接着eclipse 使用maven 创建纯spring mvc项目
毕竟项目都要访问数据库的, 所以加上mybatis的支持也就是网上大多时候说的 SSM框架的搭建(Spring + Spring MVC + Mybatis)
这个项目就叫createssm
还是从pom.xml文件开始
1 <!-- mybatis start --> 2 <dependency> 3 <groupId>org.mybatis</groupId> 4 <artifactId>mybatis</artifactId> 5 <version>${mybatis.version}</version> 6 </dependency> 7 <!-- mybatis-spring --> 8 <dependency> 9 <groupId>org.mybatis</groupId> 10 <artifactId>mybatis-spring</artifactId> 11 <version>1.3.0</version> 12 </dependency> 13 <!-- commons-dbcp 数据源 --> 14 <dependency> 15 <groupId>commons-dbcp</groupId> 16 <artifactId>commons-dbcp</artifactId> 17 <version>1.4</version> 18 </dependency> 19 20 <!-- mybatis end -->
1 <!-- jdbc driver start --> 2 <!-- oracle/ojdbc14 --> 3 <dependency> 4 <groupId>oracle</groupId> 5 <artifactId>ojdbc14</artifactId> 6 <version>10.2.0.4</version> 7 </dependency> 8 9 <!-- jdbc driver end -->
ojdbc14 的包一般比较难下, 从maven仓库手动下载到自己的maven本地仓库的oracleojdbc1410.2.0.4ojdbc14-10.2.0.4.jar
其实也可以用别得ojdbc, 但是貌似没有哪个比较好下载, 反正我的感觉是这样, 或者这里你用mysql来做测试也是一样的
先说个题外话如果使用 update project 的话按照现在的pom.xml文件 会报错
如下
如果出现类似的错误在pom文件中这样修改
1 <build> 2 <finalName>createssm</finalName> 3 4 <plugins> 5 <plugin> 6 <groupId>org.apache.maven.plugins</groupId> 7 <artifactId>maven-compiler-plugin</artifactId> 8 <version>3.1</version> 9 <configuration> 10 <source>1.8</source> 11 <target>1.8</target> 12 <encoding>UTF-8</encoding> 13 </configuration> 14 </plugin> 15 <plugin> 16 <groupId>org.apache.maven.plugins</groupId> 17 <artifactId>maven-war-plugin</artifactId> 18 <version>2.1.1</version> 19 <configuration> 20 <encoding>UTF-8</encoding> 21 </configuration> 22 </plugin> 23 </plugins> 24 </build>
然后再次update project 就好了
目前来说pom.xml文件为
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.learn.javaee</groupId> <artifactId>createssm</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>createssm Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <spring.version>4.3.2.RELEASE</spring.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- servlet api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <!-- Spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring --> <!-- mybatis start --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.1</version> </dependency> <!-- mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <!-- commons-dbcp 数据源 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!-- mybatis end --> <!-- jdbc driver start --> <!-- oracle/ojdbc14 --> <dependency> <groupId>oracle</groupId> <artifactId>ojdbc14</artifactId> <version>10.2.0.4</version> </dependency> <!-- jdbc driver end --> </dependencies> <build> <finalName>createssm</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.1.1</version> <configuration> <encoding>UTF-8</encoding> </configuration> </plugin> </plugins> </build> </project>
在applicationcontext.xml中最后插入一行
<import resource="classpath:spring-mybatis.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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 设置自动扫描的包 --> <context:component-scan base-package="cn.learn.*"></context:component-scan> <!-- 开启自动注解支持 --> <mvc:annotation-driven /> <!-- 定义静态资源位置 --> <mvc:resources location="/WEB-INF/static/" mapping="/static/**"></mvc:resources> <!-- jsp视图处理 start --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 视图前缀 --> <property name="prefix" value="/WEB-INF/view/"></property> <!-- 视图后缀 --> <property name="suffix" value=".jsp"></property> <property name="viewClass" value="org.springframework.web.servlet.view.InternalResourceView" /> <property name="order" value="1" /> </bean> <!-- jsp视图处理 end --> <!-- 引入mybatis配置 --> <import resource="classpath:spring-mybatis.xml"/> </beans>
与applicationcontext.xml文件同目录新建spring-mybatis.xml
内容
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- 引入配置文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties" /> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driver}" /> <property name="url" value="${url}" /> <property name="username" value="${username}" /> <property name="password" value="${password}" /> <!-- 初始化连接大小 --> <property name="initialSize" value="${initialSize}"></property> <!-- 连接池最大数量 --> <property name="maxActive" value="${maxActive}"></property> <!-- 连接池最大空闲 --> <property name="maxIdle" value="${maxIdle}"></property> <!-- 连接池最小空闲 --> <property name="minIdle" value="${minIdle}"></property> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="${maxWait}"></property> </bean> <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:cn/learn/mapping/*.xml"></property> </bean> <!-- DAO接口所在包名，Spring会自动查找其下的类 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.learn.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> </beans>
接下来的工作就是写各种类,
有如下图目录结构
按照spring-mybatis.xml文件
需要创建dao层和mapping层
先写mapping层的内容, 也就是EmployeesMapper.xml文件
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="cn.learn.dao.EmployeesMapper" > -- 下面会写这个类 <resultMap id="BaseResultMap" type="cn.learn.pojo.Employees" > -- 实体类的全类名, 可以任意, 不顾一般都是按照表名写 <id column="EMPLOYEE_ID" property="employeeId" jdbcType="DECIMAL" /> <result column="FIRST_NAME" property="firstName" jdbcType="VARCHAR" /> <result column="LAST_NAME" property="lastName" jdbcType="VARCHAR" /> <result column="EMAIL" property="email" jdbcType="VARCHAR" /> <result column="PHONE_NUMBER" property="phoneNumber" jdbcType="VARCHAR" /> <result column="HIRE_DATE" property="hireDate" jdbcType="DATE" /> <result column="JOB_ID" property="jobId" jdbcType="VARCHAR" /> <result column="SALARY" property="salary" jdbcType="DECIMAL" /> <result column="COMMISSION_PCT" property="commissionPct" jdbcType="DECIMAL" /> <result column="MANAGER_ID" property="managerId" jdbcType="DECIMAL" /> <result column="DEPARTMENT_ID" property="departmentId" jdbcType="DECIMAL" /> </resultMap> <sql id="Base_Column_List" > EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL, PHONE_NUMBER, HIRE_DATE, JOB_ID, SALARY, COMMISSION_PCT, MANAGER_ID, DEPARTMENT_ID </sql> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > select <include refid="Base_Column_List" /> from EMPLOYEES where EMPLOYEE_ID = #{employeeId,jdbcType=DECIMAL} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > delete from EMPLOYEES where EMPLOYEE_ID = #{employeeId,jdbcType=DECIMAL} </delete> <insert id="insert" parameterType="cn.learn.pojo.Employees" > insert into EMPLOYEES (EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL, PHONE_NUMBER, HIRE_DATE, JOB_ID, SALARY, COMMISSION_PCT, MANAGER_ID, DEPARTMENT_ID) values (#{employeeId,jdbcType=DECIMAL}, #{firstName,jdbcType=VARCHAR}, #{lastName,jdbcType=VARCHAR}, #{email,jdbcType=VARCHAR}, #{phoneNumber,jdbcType=VARCHAR}, #{hireDate,jdbcType=DATE}, #{jobId,jdbcType=VARCHAR}, #{salary,jdbcType=DECIMAL}, #{commissionPct,jdbcType=DECIMAL}, #{managerId,jdbcType=DECIMAL}, #{departmentId,jdbcType=DECIMAL}) </insert> <insert id="insertSelective" parameterType="cn.learn.pojo.Employees" > insert into EMPLOYEES <trim prefix="(" suffix=")" suffixOverrides="," > <if test="employeeId != null" > EMPLOYEE_ID, </if> <if test="firstName != null" > FIRST_NAME, </if> <if test="lastName != null" > LAST_NAME, </if> <if test="email != null" > EMAIL, </if> <if test="phoneNumber != null" > PHONE_NUMBER, </if> <if test="hireDate != null" > HIRE_DATE, </if> <if test="jobId != null" > JOB_ID, </if> <if test="salary != null" > SALARY, </if> <if test="commissionPct != null" > COMMISSION_PCT, </if> <if test="managerId != null" > MANAGER_ID, </if> <if test="departmentId != null" > DEPARTMENT_ID, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="employeeId != null" > #{employeeId,jdbcType=DECIMAL}, </if> <if test="firstName != null" > #{firstName,jdbcType=VARCHAR}, </if> <if test="lastName != null" > #{lastName,jdbcType=VARCHAR}, </if> <if test="email != null" > #{email,jdbcType=VARCHAR}, </if> <if test="phoneNumber != null" > #{phoneNumber,jdbcType=VARCHAR}, </if> <if test="hireDate != null" > #{hireDate,jdbcType=DATE}, </if> <if test="jobId != null" > #{jobId,jdbcType=VARCHAR}, </if> <if test="salary != null" > #{salary,jdbcType=DECIMAL}, </if> <if test="commissionPct != null" > #{commissionPct,jdbcType=DECIMAL}, </if> <if test="managerId != null" > #{managerId,jdbcType=DECIMAL}, </if> <if test="departmentId != null" > #{departmentId,jdbcType=DECIMAL}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="cn.learn.pojo.Employees" > update EMPLOYEES <set > <if test="firstName != null" > FIRST_NAME = #{firstName,jdbcType=VARCHAR}, </if> <if test="lastName != null" > LAST_NAME = #{lastName,jdbcType=VARCHAR}, </if> <if test="email != null" > EMAIL = #{email,jdbcType=VARCHAR}, </if> <if test="phoneNumber != null" > PHONE_NUMBER = #{phoneNumber,jdbcType=VARCHAR}, </if> <if test="hireDate != null" > HIRE_DATE = #{hireDate,jdbcType=DATE}, </if> <if test="jobId != null" > JOB_ID = #{jobId,jdbcType=VARCHAR}, </if> <if test="salary != null" > SALARY = #{salary,jdbcType=DECIMAL}, </if> <if test="commissionPct != null" > COMMISSION_PCT = #{commissionPct,jdbcType=DECIMAL}, </if> <if test="managerId != null" > MANAGER_ID = #{managerId,jdbcType=DECIMAL}, </if> <if test="departmentId != null" > DEPARTMENT_ID = #{departmentId,jdbcType=DECIMAL}, </if> </set> where EMPLOYEE_ID = #{employeeId,jdbcType=DECIMAL} </update> <update id="updateByPrimaryKey" parameterType="cn.learn.pojo.Employees" > update EMPLOYEES set FIRST_NAME = #{firstName,jdbcType=VARCHAR}, LAST_NAME = #{lastName,jdbcType=VARCHAR}, EMAIL = #{email,jdbcType=VARCHAR}, PHONE_NUMBER = #{phoneNumber,jdbcType=VARCHAR}, HIRE_DATE = #{hireDate,jdbcType=DATE}, JOB_ID = #{jobId,jdbcType=VARCHAR}, SALARY = #{salary,jdbcType=DECIMAL}, COMMISSION_PCT = #{commissionPct,jdbcType=DECIMAL}, MANAGER_ID = #{managerId,jdbcType=DECIMAL}, DEPARTMENT_ID = #{departmentId,jdbcType=DECIMAL} where EMPLOYEE_ID = #{employeeId,jdbcType=DECIMAL} </update> </mapper>
然后根据这文件写dao层的EmployeesMapping.java文件 也就是上面说的
cn.learn.dao.EmployeesMapper
, 注意代码中灰色背景部分的文
package cn.learn.dao; import cn.learn.pojo.Employees; public interface EmployeesMapper { int deleteByPrimaryKey(Integer employeeId); int insert(Employees record); int insertSelective(Employees record); Employees selectByPrimaryKey(Integer employeeId); int updateByPrimaryKeySelective(Employees record); int updateByPrimaryKey(Employees record); }
其中没个方法对应xml文件中的一个id
然后写
cn.learn.pojo.Employees
package cn.learn.pojo; import java.math.BigDecimal; import java.util.Date; public class Employees { private Integer employeeId; private String firstName; private String lastName; private String email; private String phoneNumber; private Date hireDate; private String jobId; private BigDecimal salary; private BigDecimal commissionPct; private Integer managerId; private Short departmentId; public Integer getEmployeeId() { return employeeId; } public void setEmployeeId(Integer employeeId) { this.employeeId = employeeId; } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName == null ? null : firstName.trim(); } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName == null ? null : lastName.trim(); } public String getEmail() { return email; } public void setEmail(String email) { this.email = email == null ? null : email.trim(); } public String getPhoneNumber() { return phoneNumber; } public void setPhoneNumber(String phoneNumber) { this.phoneNumber = phoneNumber == null ? null : phoneNumber.trim(); } public Date getHireDate() { return hireDate; } public void setHireDate(Date hireDate) { this.hireDate = hireDate; } public String getJobId() { return jobId; } public void setJobId(String jobId) { this.jobId = jobId == null ? null : jobId.trim(); } public BigDecimal getSalary() { return salary; } public void setSalary(BigDecimal salary) { this.salary = salary; } public BigDecimal getCommissionPct() { return commissionPct; } public void setCommissionPct(BigDecimal commissionPct) { this.commissionPct = commissionPct; } public Integer getManagerId() { return managerId; } public void setManagerId(Integer managerId) { this.managerId = managerId; } public Short getDepartmentId() { return departmentId; } public void setDepartmentId(Short departmentId) { this.departmentId = departmentId; } }
其实这三个文件可以自动生成, 回头在写一个怎么自动生成这三个文件的记录
最后写一个service, 用来处理业务层内容. 一般在项目中, controller层是用来处理逻辑层的东西
package cn.learn.service; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import cn.learn.dao.EmployeesMapper; import cn.learn.pojo.Employees; @Service public class EmployeeService { @Autowired private EmployeesMapper employeesMapper; public void pringEmployee(Integer employeeId){ Employees employees = employeesMapper.selectByPrimaryKey(employeeId); System.out.println(employees.getEmail()); } }
注解不能被忽略, 要不然不好用, 这里简单的输出了一下被查询员工的email
最后改写一下
package cn.learn.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import cn.learn.service.EmployeeService; @Controller @RequestMapping("/index") public class IndexController { @Autowired private EmployeeService employeesService; @RequestMapping("/helloword") public ModelAndView hellowordAction(){ employeesService.pringEmployee(100); //直接返回到view目录下的 index目录下的helloword.jsp return new ModelAndView("index/helloword"); } }
红色的100是我自己数据库里面一个员工的id
到这里为止, 启动服务器, 访问http://localhost:8080/createssm/index/helloword 就会在控制台数据对应员工的邮箱地址了
最后附上用plsql导出的employees表的数据结构, 这里有个别字段可能由于有外键, 导致导入失败, 自己写的时候, 可以去掉这些约束
----------------------------------------------------- -- Export file for user C##AZHW@ORCL -- -- Created by Administrator on 2016/11/12, 1:51:37 -- ----------------------------------------------------- set define off spool sql.log prompt prompt Creating table EMPLOYEES prompt ======================== prompt create table EMPLOYEES ( employee_id NUMBER(6) not null, first_name VARCHAR2(20), last_name VARCHAR2(25), email VARCHAR2(25), phone_number VARCHAR2(20), hire_date DATE, job_id VARCHAR2(10), salary NUMBER(8,2), commission_pct NUMBER(2,2), manager_id NUMBER(6), department_id NUMBER(4) ) ; comment on column EMPLOYEES.employee_id is '员工id'; comment on column EMPLOYEES.first_name is '姓'; comment on column EMPLOYEES.last_name is '名字'; comment on column EMPLOYEES.email is '邮箱'; comment on column EMPLOYEES.phone_number is '电话'; comment on column EMPLOYEES.hire_date is '入职日期'; comment on column EMPLOYEES.job_id is '工号'; comment on column EMPLOYEES.salary is '工资'; comment on column EMPLOYEES.commission_pct is '职务'; comment on column EMPLOYEES.manager_id is '直属领导id'; comment on column EMPLOYEES.department_id is '部门id'; alter table EMPLOYEES add constraint EMP_EMP_ID_PK primary key (EMPLOYEE_ID); alter table EMPLOYEES add constraint EMP_EMAIL_UK unique (EMAIL); alter table EMPLOYEES
--这几个字段有外键约束, 可以去掉不用 add constraint EMP_DEPT_FK foreign key (DEPARTMENT_ID) references DEPARTMENTS (DEPARTMENT_ID); alter table EMPLOYEES add constraint EMP_JOB_FK foreign key (JOB_ID) references JOBS (JOB_ID); alter table EMPLOYEES add constraint EMP_MANAGER_FK foreign key (MANAGER_ID) references EMPLOYEES (EMPLOYEE_ID); alter table EMPLOYEES add constraint EMP_EMAIL_NN check ("EMAIL" IS NOT NULL); alter table EMPLOYEES add constraint EMP_HIRE_DATE_NN check ("HIRE_DATE" IS NOT NULL); alter table EMPLOYEES add constraint EMP_JOB_NN check ("JOB_ID" IS NOT NULL); alter table EMPLOYEES add constraint EMP_LAST_NAME_NN check ("LAST_NAME" IS NOT NULL); alter table EMPLOYEES add constraint EMP_SALARY_MIN check (salary > 0); spool off