记录maven 整合SSM框架

　　一、新建maven项目

　　建好的项目结构如下图：

　　

　　还需要做以下配置：

　　

　　勾选上这两项后，就会自动生成 “src/main/java”   和 “src/main/resources” 这两个目录

　

　　如上图，修改项目部署路径

　

　　选择项目部署时要发布的目录， src/test/java 目录不需要发布，因此remove掉。

　　配置完成后项目的结构如下图：

　　

　　项目还在报错，这是因为现在是一个web项目，缺少servlet的jar包，在pom.xml 中加上servlet的依赖就不会报错了；

　　然后开始依赖配置，pom.xml配置如下：

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>4.3.10.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <!-- 配置servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <!-- 配置spring  -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 配置spring mvc  -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 配置spring 测试jar包  -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 配置数据库连接池 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <!-- 配置mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- 配置mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>
        <!-- @ResponseBody 依赖jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.7.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.1.41</version>
        </dependency>
    </dependencies>

spring-mybatis.xml配置如下：

<?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:util="http://www.springframework.org/schema/util" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">

    <!-- 自动扫描 -->
    <context:component-scan base-package="com.ls.test" />
    
    <!-- 引入配置文件 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:db.properties" />
    </bean>
    
    <bean id="dbcp" 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}" />
    </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="dbcp" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:com/ls/test/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="com.ls.test.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="dbcp" />
    </bean>
</beans>

db.properties 数据库配置

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/goddess
username=root
password=root123

　

开始编码工作：

　　实体类User：　　

package com.ls.test.entity;

public class User {
    private Integer userId;

    private String userName;

    private String userPassword;

    private String userToken;

    private String userDesc;

    public Integer getUserId() {
        return userId;
    }

    public void setUserId(Integer userId) {
        this.userId = userId;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName == null ? null : userName.trim();
    }

    public String getUserPassword() {
        return userPassword;
    }

    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword == null ? null : userPassword.trim();
    }

    public String getUserToken() {
        return userToken;
    }

    public void setUserToken(String userToken) {
        this.userToken = userToken == null ? null : userToken.trim();
    }

    public String getUserDesc() {
        return userDesc;
    }

    public void setUserDesc(String userDesc) {
        this.userDesc = userDesc == null ? null : userDesc.trim();
    }
}

　　数据库接口 DAO:

package com.ls.test.dao;

import com.ls.test.entity.User;

public interface UserMapper {
    int deleteByPrimaryKey(Integer userId);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer userId);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);
}

　　mybatis映射xml:

<?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="com.ls.test.dao.UserMapper">
    <resultMap id="BaseResultMap" type="com.ls.test.entity.User">
        <id column="user_id" property="userId" jdbcType="INTEGER" />
        <result column="user_name" property="userName" jdbcType="VARCHAR" />
        <result column="user_password" property="userPassword"
            jdbcType="VARCHAR" />
        <result column="user_token" property="userToken" jdbcType="VARCHAR" />
        <result column="user_desc" property="userDesc" jdbcType="VARCHAR" />
    </resultMap>
    <sql id="Base_Column_List">
        user_id, user_name, user_password, user_token, user_desc
    </sql>
    <select id="selectByPrimaryKey" resultMap="BaseResultMap"
        parameterType="java.lang.Integer">
        select
        <include refid="Base_Column_List" />
        from user
        where user_id = #{userId,jdbcType=INTEGER}
    </select>
    <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
        delete from user
        where user_id = #{userId,jdbcType=INTEGER}
    </delete>
    <insert id="insert" parameterType="com.ls.test.entity.User">
        insert into user (user_id, user_name, user_password,
        user_token, user_desc)
        values (#{userId,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR},
        #{userPassword,jdbcType=VARCHAR},
        #{userToken,jdbcType=VARCHAR}, #{userDesc,jdbcType=VARCHAR})
    </insert>
    <insert id="insertSelective" parameterType="com.ls.test.entity.User">
        insert into user
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="userId != null">
                user_id,
            </if>
            <if test="userName != null">
                user_name,
            </if>
            <if test="userPassword != null">
                user_password,
            </if>
            <if test="userToken != null">
                user_token,
            </if>
            <if test="userDesc != null">
                user_desc,
            </if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
            <if test="userId != null">
                #{userId,jdbcType=INTEGER},
            </if>
            <if test="userName != null">
                #{userName,jdbcType=VARCHAR},
            </if>
            <if test="userPassword != null">
                #{userPassword,jdbcType=VARCHAR},
            </if>
            <if test="userToken != null">
                #{userToken,jdbcType=VARCHAR},
            </if>
            <if test="userDesc != null">
                #{userDesc,jdbcType=VARCHAR},
            </if>
        </trim>
    </insert>
    <update id="updateByPrimaryKeySelective" parameterType="com.ls.test.entity.User">
        update user
        <set>
            <if test="userName != null">
                user_name = #{userName,jdbcType=VARCHAR},
            </if>
            <if test="userPassword != null">
                user_password = #{userPassword,jdbcType=VARCHAR},
            </if>
            <if test="userToken != null">
                user_token = #{userToken,jdbcType=VARCHAR},
            </if>
            <if test="userDesc != null">
                user_desc = #{userDesc,jdbcType=VARCHAR},
            </if>
        </set>
        where user_id = #{userId,jdbcType=INTEGER}
    </update>
    <update id="updateByPrimaryKey" parameterType="com.ls.test.entity.User">
        update user
        set user_name = #{userName,jdbcType=VARCHAR},
        user_password = #{userPassword,jdbcType=VARCHAR},
        user_token = #{userToken,jdbcType=VARCHAR},
        user_desc = #{userDesc,jdbcType=VARCHAR}
        where user_id = #{userId,jdbcType=INTEGER}
    </update>
</mapper>

　　服务层 UserService:

package com.ls.test.service;

import com.ls.test.entity.User;

public interface UserService {
    User findUserById(Integer userId);
}

　　UserServiceImpl:

package com.ls.test.service.impl;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.ls.test.dao.UserMapper;
import com.ls.test.entity.User;
import com.ls.test.service.UserService;

@Service
public class UserServiceImpl implements UserService {
    
    @Resource
    private UserMapper userDao;//注入UserMapper
    
    @Override
    public User findUserById(Integer userId) {
        User user = userDao.selectByPrimaryKey(userId);
        return user;
    }

}

　　控制层 controller

package com.ls.test.controller;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.ls.test.entity.User;
import com.ls.test.service.UserService;

@Controller
public class UserController {
    @Resource
    private UserService us;//注入UserService
    
    @ResponseBody
    @RequestMapping("/user")
    public User execute(@RequestParam("userId") Integer userId){
        User user = us.findUserById(userId);
        return user;
    }
}

编写测试用例：

　　TestDao

package test;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.alibaba.fastjson.JSON;
import com.ls.test.dao.UserMapper;
import com.ls.test.entity.User;

@RunWith(SpringJUnit4ClassRunner.class)  
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})
public class TestDao {
    
    @Resource
    private UserMapper userDao;
    
    @Test
    public void testDao(){
        User user = userDao.selectByPrimaryKey(1);
        System.out.println("testDao: "+JSON.toJSON(user));
    }    
}

运行测试用例，得到这个下图结果，说明mybatis配置ok

TestService

package test;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.alibaba.fastjson.JSON;
import com.ls.test.entity.User;
import com.ls.test.service.UserService;

@RunWith(SpringJUnit4ClassRunner.class)  
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})
public class TestService {
    
    @Resource
    private UserService us;
    
    @Test
    public void testUserService(){
        User user = us.findUserById(1);
        System.out.println("testUserService: "+JSON.toJSON(user));
    }
    
}

运行测试用例，得到这个下图结果，说明spring和mybatis整合成功

TestController

package test;

import javax.annotation.Resource;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.ResultActions;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import com.ls.test.controller.UserController;

@RunWith(SpringJUnit4ClassRunner.class)  
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})
public class TestController {
    
    @Resource
    private UserController uc;
    private MockMvc mockMvc;
    @Before
    public void setup(){
        mockMvc = MockMvcBuilders.standaloneSetup(uc).build();
    }
    @Test
    public void testUserController() throws Exception{
        ResultActions  resultActions=mockMvc.perform(MockMvcRequestBuilders.post("/user").param("userId", "1"));
        MvcResult mvcRresult= resultActions.andReturn();
        String result = mvcRresult.getResponse().getContentAsString();
        System.out.println("testUserController :"+result);
    }
}

运行测试用例，得到这个下图结果，说明spring、spring mvc和mybatis整合成功

实体类、dao、mybatis映射文件可以通过 mybatis-generator-core-1.3.2.jar 这个jar包自动生成，本文中样例就是同过这个jar包生成

最后附上项目最终的结构图：