ssm框架之Spring和Mybatis整合（适合新手）

最近刚学习完ssm框架，找了个项目熟悉下整合的步骤，大概是spring和mybatis先整合，之后是mybatis和springmvc的整合，这里先讲spring和mybatis的整合，已备今后的学习。

一、搭建开发环境

首先在IDEA中创建maven项目（以ecplise为例）



创建中的Group id等看情况填写即可，图中为本人的配置。



创建好的工程目录如下



如果遇到创建好的工程中没有src/main/java以及test目录等，需要右击该项目，选择Build Path中的Configure Build Path，在JRE Library选相框中Remove掉JRE再重新添加即可，如下图





接着就是pom.xml文件了

<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>me.gacl</groupId>
<artifactId>spring4-mybatis3</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>spring4-mybatis3</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- 添加Spring-core包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<vers
4000
ion>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-context包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-tx包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-jdbc包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 为了方便进行单元测试，添加spring-test包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!--添加spring-web包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!--添加aspectjweaver包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
</dependency>
<!-- 添加mybatis的核心包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<!-- 添加mybatis与Spring整合的核心包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<!-- 添加servlet3.0核心包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.2-b01</version>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- 添加mysql驱动包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
<!-- 添加druid连接池包 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.12</version>
</dependency>
<!-- 添加junit单元测试包 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>spring4-mybatis3</finalName>
</build>
</project>

二、创建数据库和表(针对MySQL)

sql创建语句如下

Create DATABASE ssm;
USE ssm;

DROP TABLE IF EXISTS t_user;
CREATE TABLE t_user (
user_id char(32) NOT NULL,
user_name varchar(30) DEFAULT NULL,
user_birthday date DEFAULT NULL,
user_salary double DEFAULT NULL,
PRIMARY KEY (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

　创建好的数据库和表如下：

　


三、使用generator工具生成代码

这里我们使用generator工具生成数据库对应的pojo，如果不会使用generator，可以看我的前一篇文章。具体的generatorConfig.xml配置如下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>

<context id="DB2Tables" targetRuntime="MyBatis3">
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://127.0.0.1:3306/ssm"
userId="root"
password="">
</jdbcConnection>
<javaTypeResolver >
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<javaModelGenerator targetPackage="com.ssm.domain" targetProject="./src">
<property name="enableSubPackages" value="false" />
<property name="trimStrings" value="true" />
</javaModelGenerator>

<sqlMapGenerator targetPackage="com.ssm.mapping"  targetProject="./src">
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>

<javaClientGenerator type="XMLMAPPER" targetPackage="com.ssm.dao"  targetProject="./src">
<property name="enableSubPackages" value="false" />
</javaClientGenerator>

<table tableName="t_user"></table>
</context>
</generatorConfiguration>

生成后的实体类

package com.ssm.domain;

import java.util.Date;

public class User {
private String userId;

private String userName;

private Date userBirthday;

private Double userSalary;

public String getUserId() {
return userId;
}

public void setUserId(String userId) {
this.userId = userId == null ? null : userId.trim();
}

public String getUserName() {
return userName;
}

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

public Date getUserBirthday() {
return userBirthday;
}

public void setUserBirthday(Date userBirthday) {
this.userBirthday = userBirthday;
}

public Double getUserSalary() {
return userSalary;
}

public void setUserSalary(Double userSalary) {
this.userSalary = userSalary;
}
}

生成后的dao类

package com.ssm.dao;

import com.ssm.domain.User;

public interface UserMapper {
int deleteByPrimaryKey(String userId);

int insert(User record);

int insertSelective(User record);

User selectByPrimaryKey(String userId);

int updateByPrimaryKeySelective(User record);

int updateByPrimaryKey(User record);
}

生成后的mapper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="com.ssm.dao.UserMapper" >
<resultMap id="BaseResultMap" type="com.ssm.domain.User" >
<id column="user_id" property="userId" jdbcType="CHAR" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="user_birthday" property="userBirthday" jdbcType="DATE" />
<result column="user_salary" property="userSalary" jdbcType="DOUBLE" />
</resultMap>
<sql id="Base_Column_List" >
user_id, user_name, user_birthday, user_salary
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >
select
<include refid="Base_Column_List" />
from t_user
where user_id = #{userId,jdbcType=CHAR}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.String" >
delete from t_user
where user_id = #{userId,jdbcType=CHAR}
</delete>
<insert id="insert" parameterType="com.ssm.domain.User" >
insert into t_user (user_id, user_name, user_birthday,
user_salary)
values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE},
#{userSalary,jdbcType=DOUBLE})
</insert>
<insert id="insertSelective" parameterType="com.ssm.domain.User" >
insert into t_user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="userId != null" >
user_id,
</if>
<if test="userName != null" >
user_name,
</if>
<if test="userBirthday != null" >
user_birthday,
</if>
<if test="userSalary != null" >
user_salary,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="userId != null" >
#{userId,jdbcType=CHAR},
</if>
<if test="userName != null" >
#{userName,jdbcType=VARCHAR},
</if>
<if test="userBirthday != null" >
#{userBirthday,jdbcType=DATE},
</if>
<if test="userSalary != null" >
#{userSalary,jdbcType=DOUBLE},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.ssm.domain.User" >
update t_user
<set >
<if test="userName != null" >
user_name = #{userName,jdbcType=VARCHAR},
</if>
<if test="userBirthday != null" >
user_birthday = #{userBirthday,jdbcType=DATE},
</if>
<if test="userSalary != null" >
user_salary = #{userSalary,jdbcType=DOUBLE},
</if>
</set>
where user_id = #{userId,jdbcType=CHAR}
</update>
<update id="updateByPrimaryKey" parameterType="com.ssm.domain.User" >
update t_user
set user_name = #{userName,jdbcType=VARCHAR},
user_birthday = #{userBirthday,jdbcType=DATE},
user_salary = #{userSalary,jdbcType=DOUBLE}
where user_id = #{userId,jdbcType=CHAR}
</update>
</mapper>

四、spring和mybaits的具体配置

注意下面的配置文件都是放在resources目录中

首先是db.properties的配置

driverClassName=com.mysql.jdbc.Driver
validationQuery=SELECT 1
jdbc_url=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
jdbc_username=root
jdbc_password=

接下是spring.xml,我是放在resources/spring/spring.xml中的

<?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"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- 引入数据库配置文件 -->
<context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
<!-- 扫描生成的接口类中的注释 -->
<context:component-scan base-package="com.ssm.service"></context:component-scan>
</beans>

然后是spring-dao.xml的配置

<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<!-- 连接池，数据源的配置 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="url" value="${jdbc_url}"></property>
<property name="username" value="${jdbc_username}"></property>
<property name="password" value="${jdbc_password}"></property>
<!-- 初始化连接大小 -->
<property name="initialSize" value="0" />
<!-- 连接池最大使用连接数量 -->
<property name="maxActive" value="20" />
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="0" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="60000" />
<!--
<property name="poolPreparedStatements" value="true" />
<property name="maxPoolPreparedStatementPerConnectionSize" value="33" />
-->
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒，也就是30分钟 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true" />
<!-- 监控数据库 -->
<!-- <property name="filters" value="stat" /> -->
<property name="filters" value="mergeStat" />
</bean>
<!--  配置sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 用于之后实例化sqlSessionFactory -->
<property name="dataSource" ref="dataSource"></property>
<!-- 扫描com.smm.mapping包中的mapper配置文件 -->
<property name="mapperLocations" value="classpath:com/ssm/mapping/*.xml"></property>
</bean>
<!-- 配置扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 扫描me.gacl.dao这个包以及它的子包下的所有映射接口类 -->
<property name="basePackage" value="com.ssm.dao"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- 配置Spring的事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 拦截器方式配置事物 -->
<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="append*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="modify*" propagation="REQUIRED" />
<tx:method name="edit*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="remove*" propagation="REQUIRED" />
<tx:method name="repair" propagation="REQUIRED" />
<tx:method name="delAndRepair" propagation="REQUIRED" />

<tx:method name="get*" propagation="SUPPORTS" />
<tx:method name="find*" propagation="SUPPORTS" />
<tx:method name="load*" propagation="SUPPORTS" />
<tx:method name="search*" propagation="SUPPORTS" />
<tx:method name="datagrid*" propagation="SUPPORTS" />

<tx:method name="*" propagation="SUPPORTS" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* me.gacl.service..*Impl.*(..))" />
<aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
</aop:config>
</beans>

五、进行单元测试

经过以上的四个步骤，srping和mybatis基本整合完成，接下来进行单元测试

首先创建com.ssm.service包，并在下面创建UserServiceI接口，代码如下

package com.ssm.service;

import com.ssm.domain.User;

public interface UserServiceI
{
void addUser(User user);
User findUserById(String user_id);
}

接着创建一个com.smm.service.impl包，在包内创建一个针对UserServiceI接口的实现类：UserServiceImpl，代码如下

package com.ssm.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ssm.dao.UserMapper;
import com.ssm.domain.User;
import com.ssm.service.UserServiceI;
@Service("userService")
public class UserServiceImpl implements UserServiceI
{
@Autowired
private UserMapper userMapper;
@Override
public void addUser(User user)
{
userMapper.insert(user);
}
@Override
public User findUserById(String user_id)
{
return userMapper.selectByPrimaryKey(user_id);
}

}

最后在src/test/java目录下创建com.ssm.test测试包，并在里面创建MybatisTest测试类，代码如下

package com.ssm.test;

import java.util.Date;

import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ssm.domain.User;
import com.ssm.service.UserServiceI;

public class MybatisTest
{
private UserServiceI userService;
@Before
public void setUp()
{
ApplicationContext bean =new  ClassPathXmlApplicationContext(new String[] {"classpath:spring/spring.xml","classpath:spring/spring-dao.xml"});
userService = (UserServiceI) bean.getBean("userService");
}
@Test
public void testAddUser()
{
User user = new User();
user.setUserId("3");
user.setUserBirthday(new Date());
user.setUserName("gatsby");
user.setUserSalary(10000.0);
userService.addUser(user);
}
}

运行该测试类，成功运行



如果遇到项目出错，首先检查之前的配置是否正确，然后右击pom.xml文件，DEBUG AS-MAVEN INSTALL，出现下图结果后再次尝试运行



到这里整合完毕，遇到任何问题欢迎留言讨论