1·.创建基本表结构并录入数据
t_employ t_dept
2 entity实体包 get ，set方法
public class admin { private int id; private String adminname; private String pwd; } public class dept { private int id; private String name; } public class employee { private int id; private String empname; private double salary; private dept dept; }
hibernate 配置文件
admin.hbm.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.entity"> <class name="admin" table="t_admin"> <id name="id" > <generator class="native"></generator> </id> <property name="adminname" length="20"></property> <property name="pwd" length="20"></property> </class> </hibernate-mapping>
dept.hbm.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.entity"> <class name="dept" table="t_dept"> <id name="id" column="deptid"> <generator class="native"></generator> </id> <property name="name" column="deptname"></property> </class> </hibernate-mapping>
employee.hbm.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.entity"> <class name="employee" table="t_employ"> <id name="id" column="empid"> <generator class="native"></generator> </id> <property name="empname" ></property> <property name="salary"></property> <many-to-one name="dept" column="dept_id" class="dept"></many-to-one> </class> </hibernate-mapping>
3. spring 配置文件 bean-base.xml
<?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 1. 连接池实例 --> <bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource" > <property name="driverClass" value="com.mysql.jdbc.Driver"></property> <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property> <property name="user" value="root"></property> <property name="password" value="root"></property> <property name="initialPoolSize" value="3"></property> <property name="maxPoolSize" value="6"></property> </bean> <!-- 2. Spring管理SessionFactory 【全部配置都写到spring中】 --> <!-- # 注入DataSource、 注入常用配置属性、映射配置属性 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <!-- a. 连接池 --> <property name="dataSource" ref="datasource"></property> <!-- b. hibernate常用配置： 方言、显示sql、自动建表等 --> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> <!-- c. 映射配置 --> <property name="mappingLocations"> <list> <value>classpath:cn/itcast/entity/*.hbm.xml</value> </list> </property> </bean> <!-- 3. 事务相关配置 --> <!-- 3.1 事务管理器类 --> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- 3.2 事务增强(如何管理事务)--> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="get*" read-only="true"/> <tx:method name="find*" read-only="true"/> <tx:method name="*" read-only="false"/> </tx:attributes> </tx:advice> <!-- 3.3 Aop配置 = 切入点表达式(拦截目标对象，生成代理) + 事务增强应用--> <aop:config> <aop:pointcut expression="execution(* cn.itcast.service.*.*(..))" id="pt"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/> </aop:config> </beans>
4.
dao层 （iadmindao,ideptdao,iemployeedao）
dao.impl层 (admindao,deptdao,employeedao)
public interface iadmindao { void save(admin admin); admin findbyadmin(admin admin); } public interface ideptdao { List<dept> getall(); dept findbyid(int id); } public interface iemployeedao { void save(employee emp); void update(employee emp); void delete(int id); employee findbyid(int id); List<employee> getall(); List<employee> getall(String employeename); }
public class admindao implements iadmindao{ private SessionFactory sessionfactory; // IOC容器(依赖)注入SessionFactory对象 public void setSessionfactory(SessionFactory sessionfactory) { this.sessionfactory = sessionfactory; } @Override public void save(admin admin) { // TODO Auto-generated method stub sessionfactory.getCurrentSession().save(admin); } @Override public admin findbyadmin(admin admin) { // TODO Auto-generated method stub return (admin)sessionfactory.getCurrentSession()
.createQuery("from admin where adminname=? and pwd=?") .setString(0, admin.getAdminname()).setString(1, admin.getPwd()).uniqueResult(); } }
public class deptdao implements ideptdao{ private SessionFactory sessionfactory; public void setSessionfactory(SessionFactory sessionfactory) { this.sessionfactory = sessionfactory; } @Override public List<dept> getall() { // TODO Auto-generated method stub return sessionfactory.getCurrentSession().createQuery("from dept").list(); } @Override public dept findbyid(int id) { // TODO Auto-generated method stub return (dept) sessionfactory.getCurrentSession().get(dept.class, id); } }
public class employeedao implements iemployeedao{ private SessionFactory sessionfactory; public void setSessionfactory(SessionFactory sessionfactory) { this.sessionfactory = sessionfactory; } @Override public void save(employee emp) { // TODO Auto-generated method stub sessionfactory.getCurrentSession().save(emp); } @Override public void update(employee emp) { // TODO Auto-generated method stub sessionfactory.getCurrentSession().update(emp); } @Override public void delete(int id) { // TODO Auto-generated method stub sessionfactory.getCurrentSession()// .createQuery("delete from employee where id=?")// .setParameter(0, id)// .executeUpdate(); } @Override public employee findbyid(int id) { // TODO Auto-generated method stub return (employee) sessionfactory.getCurrentSession().get(employee.class, id); } @SuppressWarnings("unchecked") @Override public List<employee> getall() { // TODO Auto-generated method stub return sessionfactory.getCurrentSession().createQuery("from employee").list(); } @SuppressWarnings("unchecked") @Override public List<employee> getall(String employeename) { // TODO Auto-generated method stub return sessionfactory.getCurrentSession()// .createQuery("from employee where empname like ?")// .setParameter(0, "%" +employeename + "%")// .list(); } }
bean-dao.xml
<?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- Dao 注入 SessionFactory --> <bean id="admindao" class="cn.itcast.dao.impl.admindao" > <property name="sessionfactory" ref="sessionFactory"></property> </bean> <bean id="deptdao" class="cn.itcast.dao.impl.deptdao" > <property name="sessionfactory" ref="sessionFactory"></property> </bean> <bean id="employeedao" class="cn.itcast.dao.impl.employeedao" > <property name="sessionfactory" ref="sessionFactory"></property> </bean> </beans>
5.service层 service.impl层
public interface iadminservice { void register(admin admin); admin login(admin admin); } public interface ideptservice { List<dept> getall(); dept findbyid(int id); } public interface iemployeeservice { void save(employee emp); /** * 跟新员工信息 * @param emp */ void update(employee emp); /** * 根据主键查询 * @param id * @return */ employee findbyid(int id); /** * 查询全部 * @return */ List<employee> getall(); /** * 根据员工名称条件查询 * @param employeeName * @return */ List<employee> getall(String employeename); /** * 根据主键删除 * @param id */ void delete(int id); /** * 删除多个员工 */ void deletemany(int[] ids); }
public class adminservice implements iadminservice { private iadmindao admindao; public void setAdmindao(iadmindao admindao) { this.admindao = admindao; } @Override public void register(admin admin) { // TODO Auto-generated method stub admindao.save(admin); } @Override public admin login(admin admin) { // TODO Auto-generated method stub return admindao.findbyadmin(admin); } } public class deptservice implements ideptservice { private ideptdao deptdao; public void setDeptdao(ideptdao deptdao) { this.deptdao = deptdao; } @Override public List<dept> getall() { // TODO Auto-generated method stub return deptdao.getall(); } @Override public dept findbyid(int id) { // TODO Auto-generated method stub return deptdao.findbyid(id); } } public class employeeservice implements iemployeeservice { private iemployeedao employeedao; public void setEmployeedao(iemployeedao employeedao) { this.employeedao = employeedao; } @Override public void save(employee emp) { // TODO Auto-generated method stub employeedao.save(emp); } @Override public void update(employee emp) { // TODO Auto-generated method stub employeedao.update(emp); } @Override public employee findbyid(int id) { // TODO Auto-generated method stub return employeedao.findbyid(id); } @Override public List<employee> getall() { // TODO Auto-generated method stub return employeedao.getall(); } @Override public List<employee> getall(String employeename) { // TODO Auto-generated method stub return employeedao.getall(employeename); } @Override public void delete(int id) { // TODO Auto-generated method stub employeedao.delete(id); } @Override public void deletemany(int[] ids) { // TODO Auto-generated method stub if (ids != null && ids.length >0) { for (int id : ids){ delete(id); } } } }
bean-service.xml
<?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- Service 需要注入 Dao --> <bean id="adminservice" class="cn.itcast.service.impl.adminservice"> <property name="admindao" ref="admindao"></property> </bean> <bean id="deptservice" class="cn.itcast.service.impl.deptservice"> <property name="deptdao" ref="deptdao"></property> </bean> <bean id="employeeservice" class="cn.itcast.service.impl.employeeservice"> <property name="employeedao" ref="employeedao"></property> </bean> </beans>
6.action层
/** * 员工模块控制器开发： * 1. 员工列表展示 * 2. 添加员工 * 3. 修改员工信息 * 5. 删除 * *RequestAware 将数据保存到request中 *这样不用重复 map<string,object> request=(map<string,object>)actioncontext.getcontext.get("request"); * */ public class employeeaction extends ActionSupport implements ModelDriven<employee>, RequestAware{ /** * 模型驱动要布置set get方法 */ private int deptid; public void setDeptid(int deptid) { this.deptid = deptid; } public int getDeptid() { return deptid; } /*******一、封装数据 private Employee employee = new Employee(); // 【模型驱动】 // 封装请求的部门id(下拉列表的实际的值) * * */ private employee employee= new employee(); public void setEmployee(employee employee) { this.employee = employee; } public employee getEmployee() { return employee; } @Override public employee getModel() { // TODO Auto-generated method stub return employee; //返回实例化的对象 } /*******二、注入员工Service********/ private iemployeeservice employeeservice; public void setEmployeeservice(iemployeeservice employeeservice) { this.employeeservice = employeeservice; } // 部门Service private ideptservice deptservice; public void setDeptservice(ideptservice deptservice) { this.deptservice = deptservice; } /** * 1. 员工列表展示 */ public String list(){ List<employee> listemp=employeeservice.getall(); request.put("listemp", listemp); return "list"; } /** * 添加员工 * @return */ public String viewadd(){ // 查询所有部门信息, 保存到request List<dept> listdept = deptservice.getall(); request.put("listdept", listdept); return "add"; } /** * 2. 添加员工 - 添加员工数据 */ public String save(){ // 先根据部门主键查询 dept dept= deptservice.findbyid(deptid); employee.setDept(dept); // 设置到员工对象中 employeeservice.save(employee); // 调用Service，保存员工 return "listaction"; // 重定向到Action } private Map<String, Object>request; @Override public void setRequest(Map<String, Object> request) { // TODO Auto-generated method stub this.request=request; } }
bean-action.xml
<?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <bean id="employeeaction" class="cn.itcast.action.employeeaction" > <property name="employeeservice" ref="employeeservice"></property> <property name="deptservice" ref="deptservice"></property> </bean> </beans>
bean.xml
<?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <import resource="config/bean-base.xml"/> <import resource="config/bean-dao.xml"/> <import resource="config/bean-action.xml"/> <import resource="config/bean-service.xml"/> </beans>
struts.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <package name="emp" extends="struts-default"> <global-results> <result name="success">/index.jsp</result> <result name="null">/error/null.jsp</result> <result name="error">/error/error.jsp</result> </global-results> <global-exception-mappings> <exception-mapping result="null" exception="java.lang.NullPointerException" ></exception-mapping> <exception-mapping result="error" exception="java.lang.Exception" ></exception-mapping> </global-exception-mappings> <action name="emp_*" class="employeeaction" method="{1}"> <result name="list">/WEB-INF/list.jsp</result> <result name="add">/WEB-INF/add.jsp</result> <result name="listaction" type="redirectAction">emp_list</result> </action> </package> </struts>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <!-- struts 配置信息 --> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- spring 配置信息 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:bean*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
list.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@taglib uri="/struts-tags" prefix="s" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>用户展示区</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <div align="center" style="80%"> <s:a href="emp_viewadd">添加员工</s:a> </div> <table border="1" align="center" width="80%" cellpadding="5" cellspacing="0"> <tr> <th>序号</th> <th>员工编号</th> <th>员工姓名</th> <th>员工薪水</th> </tr> <s:if test="#request.listemp != null"> <s:iterator var="emp" value="#request.listemp" status="st"> <tr> <td> <s:property value="#st.count"/> </td> <td> <s:property value="#emp.id"/> </td> <td> <s:property value="#emp.empname"/> </td> <td> <s:property value="#emp.salary"/> </td> </tr> </s:iterator> </s:if> <s:else> <tr> <td colspan="5">对不起，没有你要找的数据！请先录入。</td> </tr> </s:else> </table> </body> </html>
add.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@taglib uri="/struts-tags" prefix="s" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>添加</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <s:form action="/emp_save.action" method="post" theme="simple"> <table border="1" align="center" cellpadding="5" cellspacing="0"> <tr> <td> 员工姓名 </td> <td> <s:textfield name="empname" id="empname" value=""></s:textfield> </td> </tr> <tr> <td>员工薪水 </td> <td> <s:textfield name="salary" id="salary" value=""></s:textfield> </td> </tr> <tr> <tr> <td>选择部门</td> <td> <s:select name="deptid" headerKey="-1" headerValue="请选择" list="#request.listdept" listKey="id" listValue="name" value="-1" ></s:select> </td> </tr> <tr> <td colspan="2"> <s:submit value="添加员工"></s:submit> </td> </tr> </table> </s:form> </body> </html>
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遇到过的坑：
myeclipse tomcat服务器中已有其他项目启动 ，报错提示 其他项目找不到 配置文件。
解决办法 ，删除tomcat 服务器下其他项目配置文件 这样启动项目较快
save 增加员工，保存数据就提示找不到empsave.action ,action设置没错 ，就是添加员工添加不了
解决办法，打断点 观察到数据保存不了，在于t_employ表 empid 没设置自动增加属性，empid没值，保存不了。删除外键关联，重新创建empid 列 设为自动增长 。