spring mvc随笔

一、SpringMvc学习笔记
1、使用SpringMvc时需在web.xml文件中添加配置

<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

2、SpringMvc配置文件：spring-mvc.xml文件配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">


<context:component-scan base-package="com.controller"/>
<-- 视图解析器-->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>

3、controller配置：@Controller（注解形式）

@Controller
public class HelloWorldController {

@RequestMapping("/helloWorld")
public String helloWorld(Model model){
model.addAttribute("message", "问候SpringMvc他大爷");
return "helloWorld";  //直接返回 /WEB-INF/jsp/helloWorld.jsp
}
}

4、防止乱码：在web.xml文件中加入

<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/</url-pattern>
</filter-mapping>

5、<mvc:annotation-driven />   <!-- 加入注解驱动 -->

<!-- 使用注解的包，包括子集 -->
    <context:component-scan base-package="com.controller"/>
    <context:component-scan base-package="com.model"/>

6、ModelAndView详解：

@RequestMapping("/list")
public ModelAndView list(){
ModelAndView mav=new ModelAndView();
mav.addObject("studentList", studentList);
mav.setViewName("student/list");
return mav;
}

@RequestMapping("/preSave")
public ModelAndView preSave(@RequestParam(value="id",required=false) String id){
ModelAndView mav=new ModelAndView();
if (id != null) {
mav.addObject("student", studentList.get(Integer.parseInt(id)-1));
mav.setViewName("student/update");
}else {
mav.setViewName("student/add");
}
return mav;
}

@RequestMapping("/save")
public String save(Student student){
if (student.getId() != 0) {
Student s = studentList.get(student.getId()-1);
s.setName(student.getName());
s.setAge(student.getAge());
}else {
studentList.add(student);
}
return "redirect:/student/list.do";//重定向
}


@RequestMapping("/delete")
public String delete(@RequestParam(value="id",required=false) int id){
studentList.remove(id-1);
return "redirect:/student/list.do";//重定向
}

7、

@RequestMapping("/login")
public String login(HttpServletRequest request,HttpServletResponse response){
System.out.println("---------登录验证--------");
String userName = request.getParameter("userName");
String password = request.getParameter("password");
Cookie cookie = new Cookie("user", userName+"-"+password);

User currentUser = new User(userName, password);

cookie.setMaxAge(1*60*60*24*7);
response.addCookie(cookie);

HttpSession session = request.getSession();
session.setAttribute("currentUser", currentUser);

return "redirect:/main.jsp";
} 

@RequestMapping("/login2")
public String login2(HttpServletRequest request){
System.out.println("---------登录验证--------");
return "redirect:/main.jsp";
} 

@RequestMapping("/login3")
public String login3(HttpSession session){
System.out.println("---------登录验证--------");

session.setAttribute("currentUser", "");

return "redirect:/main.jsp";
} 

//直接返回user对象的ajax形式信息
@RequestMapping("/ajax")
public @ResponseBody User ajax(){
User user = new User("张三", "admin");
return user;
}

@RequestMapping("/list")
public String list(Model model){
return "article/list";
}

//restful风格的url
//请求地址形式为：
//<a href="${pageContext.request.contextPath}/article/details/1" target="_blank">文章一</a>
//<a href="${pageContext.request.contextPath}/article/details/2" target="_blank">文章二</a>

@RequestMapping("/details/{id}")
public ModelAndView details(@PathVariable("id") int id){
ModelAndView mav=new ModelAndView();
if(id==1){
mav.addObject("article", new Article("文章一","文章一的内容"));
}else if(id==2){
mav.addObject("article", new Article("文章二","文章二的内容"));
}
mav.setViewName("article/details");
return mav;
}

8、SpringMvc配置支持文件上传：

<!-- 支持文件上传 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8" />
<property name="maxUploadSize" value="10485760" /><!-- maxsize 10M -->
</bean>

<!-- SpringMvc特殊处理，防止静态图片资源被拦截，将其映射到/resources/**路径 -->
<mvc:resources location="/images/" mapping="/images/**"></mvc:resources>
<mvc:resources location="/css/" mapping="/css/**"></mvc:resources>

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
        <property name="defaultEncoding" value="UTF-8"/>  
        <!-- 指定所上传文件的总大小不能超过200KB。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 -->  
        <property name="maxUploadSize" value="20000000"/>  
    </bean>

前台页面：
1、单文件上传
前台页面配置：

<form action="upLoad.do" method="post" enctype="multipart/form-data">
<table>
<tr>
<th colspan="2">上传文件</th>
</tr>
<tr>
<td>文件一</td>
<td>
<input type="file" name="file"/>
</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="上传文件"/>
</td>
</tr>
</table>
</form>

后台controller：

@RequestMapping("/upload")
public String uploadFile(@RequestParam("file1") MultipartFile file1,HttpServletRequest request)throws Exception{
String filePath=request.getServletContext().getRealPath("/");
System.out.println(filePath);
file1.transferTo(new File(filePath+"upload/"+file1.getOriginalFilename()));
return "redirect:success.html";
}

2、多文件上传
前台页面：

<form action="upLoadPic2.do" method="post" enctype="multipart/form-data">
<table>
<tr>
<th colspan="2">上传文件</th>
</tr>
<tr>
<td>文件一</td>
<td>
<input type="file" name="file"/>
</td>
</tr>
<tr>
<td>文件二</td>
<td>
<input type="file" name="file"/>
</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="上传文件"/>
</td>
</tr>
</table>
</form>

后台controller：

@RequestMapping("/upLoadPic2")
public String uploadFiles(@RequestParam("file") MultipartFile[] files,HttpServletRequest request)throws Exception{
String filePath=request.getServletContext().getRealPath("/");
System.out.println(filePath);
for(MultipartFile file:files){
file.transferTo(new File(filePath+"upload/"+file.getOriginalFilename()));
}
return "redirect:success.html";
}

二、Spring学习笔记
1、bean配置

<bean id="zhangsan" class="com.service.ZhangSan"></bean>
    <bean id="lisi" class="com.service.LiSi"></bean>
    <bean id="javaWork" class="com.service.JavaWork">
    <property name="tester" ref="zhangsan"></property>
    </bean>

2、获取ApplicationContext对象：

ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
HelloWorld helloWorld = (HelloWorld) context.getBean("helloWorld");

3、bean的注入方法：
属性注入、构造注入（通过类型、索引、联合使用类型和索引）、非静态工厂注入、工厂注入、泛型依赖注入

<bean id="people" class="com.entity.People"></bean>
   
   <bean id="people2" class="com.entity.People">
    <!-- 属性注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
   </bean>
   
   <bean id="people3" class="com.entity.People">
    <!-- 构造注入，通过类型 -->
    <constructor-arg type="int" value="2"></constructor-arg>
    <constructor-arg type="String" value="李四"></constructor-arg>
    <constructor-arg type="int" value="22"></constructor-arg>
   </bean>
   
   <bean id="people4" class="com.entity.People">
    <!-- 构造注入，通过索引 -->
    <constructor-arg index="0" value="3"></constructor-arg>
    <constructor-arg index="1" value="王五"></constructor-arg>
    <constructor-arg index="2" value="24"></constructor-arg>
   </bean>
   
   <bean id="people5" class="com.entity.People">
    <!-- 构造注入，联合使用 -->
    <constructor-arg index="0" type="int" value="4"></constructor-arg>
    <constructor-arg index="1" type="String" value="赵六"></constructor-arg>
    <constructor-arg index="2" type="int" value="21"></constructor-arg>
   </bean>
   
   <!-- 非静态工厂注入 -->
   <bean id="peopleFactory" class="com.factory.PeopleFactory"></bean>
   <bean id="people6" factory-bean="peopleFactory" factory-method="createPeople"></bean>
   
    <!-- 静态工厂注入 -->
   <bean id="people7" class="com.factory.PeopleFactory2" factory-method="createPeople"></bean>

<!-- 泛型依赖注入，后边讲 -->

public class PeopleFactory {
public People createPeople(){
People people = new People();
people.setId(6);
people.setAge(29);
people.setName("李伟");
return people;
}
}

public class PeopleFactory2 {
public static People createPeople(){
People people = new People();
people.setId(5);
people.setAge(23);
people.setName("刘锡");
return people;
}
}

4、各种类型注入（包括集合属性）

<bean id="people1" class="com.entity.People">
    <!-- 基本属性注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
   </bean>
   
   <bean id="people2" class="com.entity.People">
    <!-- bean注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog" ref="dog"></property>
   </bean>
   <bean id="dog" class="com.entity.Dog">
    <property name="name" value="jack"></property>
   </bean>
   
   <bean id="people3" class="com.entity.People">
    <!-- 内部bean注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog">
  <bean class="com.entity.Dog">
  <property name="name" value="tom"></property>
  </bean>
  </property>
   </bean>
   
   <bean id="people4" class="com.entity.People">
    <!-- null值，即没有dog属性 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog">
  <null></null>
  </property>
   </bean>
   
   <!-- <bean id="people5" class="com.entity.People">
    级联属性，dog必须先new
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog.name" value="jerry"></property>
   </bean> -->
   
   <bean id="people6" class="com.entity.People">
    <!-- list集合注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog" ref="dog"></property>
    <property name="hobbies">
    <list>
    <value>唱歌</value>
    <value>跳舞</value>
    </list>
    </property>
   </bean>
   
   <bean id="people7" class="com.entity.People">
    <!-- set集合注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog" ref="dog"></property>
    <property name="hobbies">
    <list>
    <value>唱歌</value>
    <value>跳舞</value>
    </list>
    </property>
    <property name="loves">
    <set>
    <value>唱歌2</value>
    <value>跳舞2</value>
    </set>
    </property>
   </bean>
   
    <bean id="people8" class="com.entity.People">
    <!-- map集合注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog" ref="dog"></property>
    <property name="hobbies">
    <list>
    <value>唱歌</value>
    <value>跳舞</value>
    </list>
    </property>
    <property name="loves">
    <set>
    <value>唱歌2</value>
    <value>跳舞2</value>
    </set>
    </property>
    <property name="works">
    <map>
    <entry>
    <key><value>上午</value></key>
    <value>写代码</value>
    </entry>
    <entry>
    <key><value>中午</value></key>
    <value>喝茶</value>
    </entry>
    <entry>
    <key><value>下午</value></key>
    <value>睡觉</value>
    </entry>
    </map>
    </property>
   </bean>
   
   <bean id="people9" class="com.entity.People">
    <!-- properties属性注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <property name="dog" ref="dog"></property>
    <property name="hobbies">
    <list>
    <value>唱歌</value>
    <value>跳舞</value>
    </list>
    </property>
    <property name="loves">
    <set>
    <value>唱歌2</value>
    <value>跳舞2</value>
    </set>
    </property>
    <property name="works">
    <map>
    <entry>
    <key><value>上午</value></key>
    <value>写代码</value>
    </entry>
    <entry>
    <key><value>中午</value></key>
    <value>喝茶</value>
    </entry>
    <entry>
    <key><value>下午</value></key>
    <value>睡觉</value>
    </entry>
    </map>
    </property>
    <property name="address">
    <props>
    <prop key="address1">address1</prop>
    <prop key="address2">address2</prop>
    </props>
    </property>
   </bean>

People类主体：

private int id;
private String name;
private int age;
private Dog dog;
private List<String> hobbies = new ArrayList<String>();
private Set<String> loves = new HashSet<String>();
private Map<String, String> works = new HashMap<String, String>();
private Properties address = new Properties();

//测试类主体
private ApplicationContext ac;


@Before
public void setUp() throws Exception {
ac = new ClassPathXmlApplicationContext("beans.xml");
}

/*注入基本类型值*/
@Test
public void test() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people1 = (People) ac.getBean("people1");
System.out.println(people1);
}

/*注入bean*/
@Test
public void test2() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people2 = (People) ac.getBean("people2");
System.out.println(people2);
}

/*注入内部bean*/
@Test
public void test3() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people3 = (People) ac.getBean("people3");
System.out.println(people3);
}

/*注入null*/
@Test
public void test4() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people4 = (People) ac.getBean("people4");
System.out.println(people4);
}

/*级联属性*/
@Test
public void test5() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people5 = (People) ac.getBean("people5");
System.out.println(people5);
}

/*注入list集合*/
@Test
public void test6() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people6 = (People) ac.getBean("people6");
System.out.println(people6);
}

/*注入set集合*/
@Test
public void test7() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people7 = (People) ac.getBean("people7");
System.out.println(people7);
}

/*注入map集合*/
@Test
public void test8() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people8 = (People) ac.getBean("people8");
System.out.println(people8);
}

/*注入properties属性*/
@Test
public void test9() {
ac = new ClassPathXmlApplicationContext("beans.xml");
People people9 = (People) ac.getBean("people9");
System.out.println(people9);
}


5、自动注入：
default-autowire="byType"><!-- 自动注入，byName、byType -->
    <!-- 
    byName时，根据people中的dog属性去寻找beans.xml中匹配的dog对象注入
    byType时，根据type类型自动注入，如果beans.xml中有两个dog对象，则报错
    constructor，和byType类似，在people中生成单独dog的构造方法即可
    -->

6、设置bean实例为多例：

<bean id="people1" class="com.entity.People">
    <!-- bean注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <!-- <property name="dog" ref="dog"></property> -->
    <!-- 虽然引用的dog为prototype多例，但是每次一个新的people生成的dog均为同一条dog，即注入之后已经固定死，不能动态改变 -->
    
    <lookup-method name="getDog" bean="dog"/>
    <!-- 加入lookup配置之后，每个people生成的dog都是多例的 -->
   </bean>
   <bean id="dog" class="com.entity.Dog" scope="prototype"><!-- prototype，设置bean为多例 -->
    <property name="name" value="jack"></property>
   </bean>

   public abstract Dog getDog();//让srping去动态实现dog的多例

7、Spring中的方法替换：

<bean id="people1" class="com.entity.People">
    <!-- bean注入 -->
    <property name="id" value="1"></property>
    <property name="name" value="张三"></property>
    <property name="age" value="20"></property>
    <replaced-method name="getDog" replacer="people2"></replaced-method>
    <!-- 方法替换：将people里面的getDog方法替换为people2中的实现的方法 -->
   </bean>
   
   <bean id="people2" class="com.entity.People2"></bean>

People实体类：

public class People {
private int id;
private String name;
private int age;
private Dog dog;//byName时，自动注入beans中名称为dog的属性

public int getId() {
return id;
}

public Dog getDog(){
Dog dog = new Dog();
dog.setName("jack");
return dog;
}

public void setDog(Dog dog) {
this.dog = dog;
}
public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

People2实体类，实现接口org.springframework.beans.factory.support.MethodReplacerMethodReplacer
public class People2 implements MethodReplacer{
@Override
public Object reimplement(Object arg0, Method arg1, Object[] arg2)
throws Throwable {
Dog dog = new Dog();
dog.setName("tom");
return dog;
}
}

8、bean的作用范围：prototype多例，request即每次请求创建一个新的bean，session，global session，
        application，singleton单例 ，request

<bean id="abstractPeople" class="com.entity.People" abstract="true" scope="prototype" >
    <property name="className" value="高三五班"></property>
    <property name="age" value="19"></property>
   </bean>


<!-- bean之间的继承 ,加入depends-on属性后，则优先寻找authority的bean并初始化-->
<bean id="zhangsan" parent="abstractPeople" depends-on="authority">
<property name="id" value="1"></property>
<property name="name" value="张三"></property>
</bean>
<!-- bean继承并覆盖父bean属性值age -->
<bean id="lisi" parent="abstractPeople">
<property name="id" value="1"></property>
<property name="name" value="张三"></property>
<property name="age" value="20"></property>
</bean>

<bean id="authority" class="com.authority.Authority"></bean>

Authority实体类：

public class Authority {
public Authority() {
System.out.println("获取权限");
}
} 

9、Spring AOP

public class StudentServiceImpl implements StudentService {
@Override
public void addStudent(String name) {
//未使用aop的话，只会增加代码耦合度
System.out.println("开始添加学生："+name);
System.out.println("添加学生:"+name);
System.out.println("完成学生"+name+"添加");
}
}

AOP配置：

<bean id="studentService" class="com.service.impl.StudentServiceImpl"></bean>
    <!-- aspect的定义 -->
    <bean id="studentServiceAspect" class="com.advice.StudentServiceAspect"></bean>
    <aop:config>
    <aop:aspect id="studentServiceAspect" ref="studentServiceAspect">
    <!-- *代表任意，第一个*代表返回值，第二个代表类名，第三个代表方法名，括号..代表方法参数任意 -->
    <aop:pointcut expression="execution(* com.service.*.*(..))" id="businessService"/>
    <aop:before method="doBefore" pointcut-ref="businessService"/>
    <aop:after method="doAfter" pointcut-ref="businessService"/>
    <aop:around method="doAround" pointcut-ref="businessService"/>
    <aop:after-returning method="doAfterReturning" pointcut-ref="businessService"/>
    <aop:after-throwing method="doAfterThrowing" pointcut-ref="businessService" throwing="ex"/>
    </aop:aspect>
    </aop:config>

StudentServiceAspect实体类：

public class StudentServiceAspect {
//前置通知
public void doBefore(JoinPoint jp){
System.out.println("类名："+jp.getTarget().getClass().getName());
System.out.println("方法名："+jp.getSignature().getName());
System.out.println("开始添加学生："+jp.getArgs()[0]);
}
//后置通知
public void doAfter(JoinPoint jp){
System.out.println("类名："+jp.getTarget().getClass().getName());
System.out.println("方法名："+jp.getSignature().getName());
System.out.println("学生添加完成："+jp.getArgs()[0]);
}
//环绕通知
public Object doAround(ProceedingJoinPoint pjp) throws Throwable{
System.out.println("添加学生前");
Object retVal = pjp.proceed();//代表方法执行，如果配置了环绕通知，则不必在配置前后置通知，
//retVal即为所执行的方法的返回值
System.out.println(retVal);
System.out.println("添加学生后");
return retVal;
}

//返回通知,方法return之前调用
public void doAfterReturning(JoinPoint jp) throws Throwable{
System.out.println("返回通知");
}

//异常通知,方法return之前调用
public void doAfterThrowing(JoinPoint jp,Throwable ex) throws Throwable{
System.out.println("异常通知");
System.out.println("异常信息："+ex.getMessage());
}
} 

10、Spring JDBC的支持
1）JdbcTemplate使用：

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
<context:property-placeholder location="jdbc.properties"/>
    
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource"></property>
    </bean>


<bean id="studentDao" class="dao.impl.StudentDaoImpl">
<property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean> 

<bean id="studentService" class="service.impl.StudentServiceImpl">
<property name="studentDao" ref="studentDao"></property>
</bean> 

jdbc.properties文件：

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_spring
jdbc.username=root
jdbc.password=123

StudentDaoImpl类实体：

public class StudentDaoImpl implements StudentDao{


private JdbcTemplate jdbcTemplate;

public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}


@Override
public int addStudent(Student student) {
String sql="insert into t_student values(null,?,?)";
Object []params=new Object[]{student.getName(),student.getAge()};
return jdbcTemplate.update(sql,params);
}


@Override
public int updateStudent(Student student) {
String sql="update t_student set name=?,age=? where id=?";
Object []params=new Object[]{student.getName(),student.getAge(),student.getId()};
return jdbcTemplate.update(sql,params);
}


@Override
public int deleteStudent(int id) {
String sql="delete from t_student where id=?";
Object []params=new Object[]{id};
return jdbcTemplate.update(sql,params);
}


@Override
public List<Student> findStudents() {
String sql="select * from t_student";
final List<Student> studentList=new ArrayList<Student>();
jdbcTemplate.query(sql, new RowCallbackHandler(){


@Override
public void processRow(ResultSet rs) throws SQLException {
Student student=new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setAge(rs.getInt("age"));
studentList.add(student);
}

});
return studentList;
}
}

2）JdbcDaoSupport使用

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
<context:property-placeholder location="jdbc.properties"/>

<bean id="studentDao" class="dao.impl.StudentDaoImpl">
<property name="dataSource" ref="dataSource"></property>
</bean> 

<bean id="studentService" class="service.impl.StudentServiceImpl">
<property name="studentDao" ref="studentDao"></property>
</bean> 

StudentDaoImpl实体类：

public class StudentDaoImpl extends JdbcDaoSupport implements StudentDao{
//extends之后 只需为id=studentDao的bean添加dataSource即可

@Override
public int addStudent(Student student) {
String sql="insert into t_student values(null,?,?)";
Object []params=new Object[]{student.getName(),student.getAge()};
return this.getJdbcTemplate().update(sql,params);
}


@Override
public int updateStudent(Student student) {
String sql="update t_student set name=?,age=? where id=?";
Object []params=new Object[]{student.getName(),student.getAge(),student.getId()};
return this.getJdbcTemplate().update(sql,params);
}


@Override
public int deleteStudent(int id) {
String sql="delete from t_student where id=?";
Object []params=new Object[]{id};
return this.getJdbcTemplate().update(sql,params);
}


@Override
public List<Student> findStudents() {
String sql="select * from t_student";
final List<Student> studentList=new ArrayList<Student>();
this.getJdbcTemplate().query(sql, new RowCallbackHandler(){


@Override
public void processRow(ResultSet rs) throws SQLException {
Student student=new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setAge(rs.getInt("age"));
studentList.add(student);
}

});
return studentList;
}
}

3）使用namedParameterJdbcTemplate

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
<context:property-placeholder location="jdbc.properties"/>

<bean id="studentDao" class="dao.impl.StudentDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate"></property>
</bean> 
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
    <constructor-arg ref="dataSource"></constructor-arg>
    </bean>
    
<bean id="studentService" class="service.impl.StudentServiceImpl">
<property name="studentDao" ref="studentDao"></property>
</bean> 

StudentDaoImpl实体类：

public class StudentDaoImpl implements StudentDao{

private NamedParameterJdbcTemplate namedParameterJdbcTemplate;

public NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
return namedParameterJdbcTemplate;
}


public void setNamedParameterJdbcTemplate(
NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
}


@Override
public int addStudent(Student student) {
String sql="insert into t_student values(null,:name,:age)";
MapSqlParameterSource mps = new MapSqlParameterSource();
mps.addValue("name", student.getName());
mps.addValue("age", student.getAge());
return namedParameterJdbcTemplate.update(sql, mps);
}


@Override
public int updateStudent(Student student) {
String sql="update t_student set name=:name,age=:age where id=:id";
MapSqlParameterSource mps = new MapSqlParameterSource();
mps.addValue("name", student.getName());
mps.addValue("age", student.getAge());
mps.addValue("id", student.getId());
return namedParameterJdbcTemplate.update(sql,mps);
}


@Override
public int deleteStudent(int id) {
MapSqlParameterSource mps = new MapSqlParameterSource();
String sql="delete from t_student where id=:id";
mps.addValue("id", id);
return namedParameterJdbcTemplate.update(sql,mps);
}


@Override
public List<Student> findStudents() {
String sql="select * from t_student";
final List<Student> studentList=new ArrayList<Student>();
namedParameterJdbcTemplate.query(sql, new RowCallbackHandler(){


@Override
public void processRow(ResultSet rs) throws SQLException {
Student student=new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setAge(rs.getInt("age"));
studentList.add(student);
}

});
return studentList;
}
}

测试类：

public class T {


private ApplicationContext ac;


@Before
public void setUp() throws Exception {
ac=new ClassPathXmlApplicationContext("beans.xml");
}


@Test
public void addStudent() {
StudentService studentService=(StudentService)ac.getBean("studentService");
int addNums=studentService.addStudent(new Student("王五", 1));
if(addNums==1){
System.out.println("添加成功");
}
}

@Test
public void updateStudent() {
StudentService studentService=(StudentService)ac.getBean("studentService");
int updateNums=studentService.updateStudent(new Student(6,"王五2", 2));
if(updateNums==1){
System.out.println("更新成功");
}
}

@Test
public void deleteStudent() {
StudentService studentService=(StudentService)ac.getBean("studentService");
int deleteNums=studentService.deleteStudent(6);
if(deleteNums==1){
System.out.println("删除成功");
}
}

@Test
public void findStudents() {
StudentService studentService=(StudentService)ac.getBean("studentService");
List<Student> studentList=studentService.findStudents();
for(Student student:studentList){
System.out.println(student);
}
}
}

11、Spring 事务管理器

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
    <!-- jdbc事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 事务管理模板 -->
    <bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
    <property name="transactionManager" ref="transactionManager"></property>
    </bean>
    
<context:property-placeholder location="jdbc.properties"/>

<bean id="bankDao" class="dao.impl.BankDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate"></property>
</bean> 
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
    <constructor-arg ref="dataSource"></constructor-arg>
    </bean>
    
<bean id="bankService" class="service.impl.BankServiceImpl">
<property name="bankDao" ref="bankDao"></property>
<property name="transactionTemplate" ref="transactionTemplate"></property>
</bean> 

BankDaoImpl实体类：

public class BankDaoImpl implements BankDao {

private NamedParameterJdbcTemplate namedParameterJdbcTemplate;

public NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
return namedParameterJdbcTemplate;
}


public void setNamedParameterJdbcTemplate(
NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
}


@Override
public void inMoney(int money, int userId) {
String sql = "update t_count set count = count + :money where userId = :userId";
MapSqlParameterSource mps = new MapSqlParameterSource();
mps.addValue("money", money);
mps.addValue("userId", userId);
namedParameterJdbcTemplate.update(sql, mps);
}


@Override
public void outMoney(int money, int userId) {
String sql = "update t_count set count = count - :money where userId = :userId";
MapSqlParameterSource mps = new MapSqlParameterSource();
mps.addValue("money", money);
mps.addValue("userId", userId);
namedParameterJdbcTemplate.update(sql, mps);
}
}

BankServiceImpl实体类：

public class BankServiceImpl implements BankService{

private BankDao bankDao;
private TransactionTemplate transactionTemplate;
/*要使用TransactionTemplate，需要加jdbc事务管理器*/

/*编程式事务管理*/
@Override
public void transferAccounts(final int count,final int userIdA,final int userIdB) {
transactionTemplate.execute(new TransactionCallbackWithoutResult() {

@Override
protected void doInTransactionWithoutResult(TransactionStatus status) {
bankDao.outMoney(count, userIdA);
bankDao.inMoney(count, userIdB);
}
});
}
public void setBankDao(BankDao bankDao) {
this.bankDao = bankDao;
}
public TransactionTemplate getTransactionTemplate() {
return transactionTemplate;
}
public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
this.transactionTemplate = transactionTemplate;
}
}

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
    <!-- jdbc事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置事务通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
    <tx:method name="*"/><!-- 所有方法 -->
    </tx:attributes>
    </tx:advice>
    <!-- 配置事务切面 -->
    <aop:config>
    <!-- 配置切点 -->
    <aop:pointcut expression="execution(* com.service.*.*(..))" id="serviceMethod"/>
    <!-- 配置事务通知 -->
    <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
    </aop:config>
    <!-- 事务管理模板 -->
    <bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
    <property name="transactionManager" ref="transactionManager"></property>
    </bean>
    
<context:property-placeholder location="jdbc.properties"/>

<bean id="bankDao" class="dao.impl.BankDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate"></property>
</bean> 
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
    <constructor-arg ref="dataSource"></constructor-arg>
    </bean>
    
<bean id="bankService" class="service.impl.BankServiceImpl">
<property name="bankDao" ref="bankDao"></property>
<property name="transactionTemplate" ref="transactionTemplate"></property>
</bean>

public class BankDaoImpl implements BankDao {

private NamedParameterJdbcTemplate namedParameterJdbcTemplate;

public NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
return namedParameterJdbcTemplate;
}


public void setNamedParameterJdbcTemplate(
NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
}


@Override
public void inMoney(int money, int userId) {
String sql = "update t_count2 set count = count + :money where userId = :userId";
MapSqlParameterSource mps = new MapSqlParameterSource();
mps.addValue("money", money);
mps.addValue("userId", userId);
namedParameterJdbcTemplate.update(sql, mps);
}


@Override
public void outMoney(int money, int userId) {
String sql = "update t_count set count = count - :money where userId = :userId";
MapSqlParameterSource mps = new MapSqlParameterSource();
mps.addValue("money", money);
mps.addValue("userId", userId);
namedParameterJdbcTemplate.update(sql, mps);
}
}

public class BankServiceImpl implements BankService{

private BankDao bankDao;
@Override
public void transferAccounts(final int count,final int userIdA,final int userIdB) {
bankDao.outMoney(count, userIdA);
bankDao.inMoney(count, userIdB);
}
public void setBankDao(BankDao bankDao) {
this.bankDao = bankDao;
}
}

<!-- jdbc事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 事务管理模板 -->
    <bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
    <property name="transactionManager" ref="transactionManager"></property>
    </bean>
    
    <!-- 事务管理注解驱动 --> 
    <tx:annotation-driven transaction-manager="transactionManager"/>
    
<context:property-placeholder location="jdbc.properties"/>

<bean id="bankDao" class="dao.impl.BankDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate"></property>
</bean> 
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
    <constructor-arg ref="dataSource"></constructor-arg>
    </bean>
    
<bean id="bankService" class="service.impl.BankServiceImpl">
<property name="bankDao" ref="bankDao"></property>
<property name="transactionTemplate" ref="transactionTemplate"></property>
</bean> 

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
    <!-- jdbc事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置事务通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
    <!-- <tx:method name="*"/>所有方法配置事务通知，适应于service较多情况下 -->
    <!-- 配置事务传播特性 -->
    <tx:method name="insert*" propagation="REQUIRED" />  
            <tx:method name="update*" propagation="REQUIRED" />  
            <tx:method name="edit*" propagation="REQUIRED" />  
            <tx:method name="save*" propagation="REQUIRED" />  
            <tx:method name="add*" propagation="REQUIRED" />  
            <tx:method name="new*" propagation="REQUIRED" />  
            <tx:method name="set*" propagation="REQUIRED" />  
            <tx:method name="remove*" propagation="REQUIRED" />  
            <tx:method name="delete*" propagation="REQUIRED" />  
            <tx:method name="change*" propagation="REQUIRED" />  
            <tx:method name="get*" propagation="REQUIRED" read-only="true" />  
            <tx:method name="find*" propagation="REQUIRED" read-only="true" />  
            <tx:method name="load*" propagation="REQUIRED" read-only="true" />  
            <tx:method name="*" propagation="REQUIRED" read-only="true" />  
    </tx:attributes>
    </tx:advice>
    <!-- 配置事务切面 -->
    <aop:config>
    <!-- 配置切点 -->
    <aop:pointcut expression="execution(* com.service.*.*(..))" id="serviceMethod"/>
    <!-- 配置事务通知 -->
    <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
    </aop:config>
    <!-- 事务管理模板 -->
    <bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
    <property name="transactionManager" ref="transactionManager"></property>
    </bean>
    
<context:property-placeholder location="jdbc.properties"/>

<bean id="bankDao" class="dao.impl.BankDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate"></property>
</bean> 
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
    <constructor-arg ref="dataSource"></constructor-arg>
    </bean>
    
<bean id="bankService" class="service.impl.BankServiceImpl">
<property name="bankDao" ref="bankDao"></property>
<property name="transactionTemplate" ref="transactionTemplate"></property>
</bean>