[新手-图文]整合ssm框架，从mybatis到spring+mybatis再到ssm(sping+mybatis+spingmvc)，数据库mysql

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0序 相关准备

ssmJar包

数据库

创建  db_ssm数据库t_user表   照图中插入一条数据

1，创建一个web项目

2，导入jar包

有点多。。。

3，创建service dao entity实体 

代码

Usermapper.java

package cn.abc.dao.user;

import cn.abc.entity.User;

public interface UserMapper {
public User getUserById(int id);
}

Usermapper.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="cn.abc.dao.user.UserMapper">

<select id="getUserById" parameterType="Integer" resultType="User">
select * from t_user where id = #{id};
</select>
</mapper>

User.java

package cn.abc.entity;

public class User {
private int id;
private String name;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", password=" + password
+ "]";
}
}

UserService.java

package cn.abc.service;

import cn.abc.entity.User;

public interface UserService {
public User getUserById(int id);
}

UserServiceImpl.java

package cn.abc.service;

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

import cn.abc.dao.user.UserMapper;
import cn.abc.entity.User;
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;

public UserMapper getUserMapper() {
return userMapper;
}

public void setUserMapper(UserMapper userMapper) {
this.userMapper = userMapper;
}

public User getUserById(int id) {
// TODO Auto-generated method stub
return userMapper.getUserById(id);
}

}

4，创建resources文件夹 

Jdbc.properties

driver=com.mysql.jdbc.Driver
#在和mysql传递数据的过程中，使用unicode编码格式，并且字符集设置为utf-8
url=jdbc:mysql://127.0.0.1:3306/db_ssm?useUnicode=true&characterEncoding=utf-8
user=root
password=myw123456
#定义初始连接数
initialSize=5
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
#暂时未知
removeAbandonedTimeout=180
#无用链接回收机制
removeAbandoned=true

log4j.properties

log4j.rootLogger=DEBUG,CONSOLE,file
#log4j.rootLogger=ERROR,ROLLING_FILE
log4j.logger.cn.smbms.dao=debug
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug
log4j.logger.java.sql.ResultSet=debug
log4j.logger.org.tuckey.web.filters.urlrewrite.UrlRewriteFilter=debug

######################################################################################
# Console Appender  \u65e5\u5fd7\u5728\u63a7\u5236\u8f93\u51fa\u914d\u7f6e
######################################################################################
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=error
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= [%p] %d %c - %m%n

######################################################################################
# DailyRolling File  \u6bcf\u5929\u4ea7\u751f\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\uff0c\u6587\u4ef6\u540d\u683c\u5f0f:log2009-09-11
######################################################################################
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.DatePattern=yyyy-MM-dd
log4j.appender.file.File=log.log
log4j.appender.file.Append=true
log4j.appender.file.Threshold=error
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-M-d HH:mm:ss}%x[%5p](%F:%L) %m%n

log4j.logger.com.opensymphony.xwork2=error

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

<!-- 通过这个配置文件完成mybatis与数据库的连接 -->
<configuration>

<!-- 引入 database.properties 文件-->
<properties resource="jdbc.properties"/>

<settings>
<!-- 配置mybatis的log实现为LOG4J -->
<setting name="logImpl" value="LOG4J" />
<!-- 设置resultMap的自动映射级别为NONE(禁止自动匹配) -->
<!-- <setting name="autoMappingBehavior" value="NONE" /> -->
</settings>

<!--类型别名-->
<typeAliases>
<!-- <typeAlias alias="User" type="cn.smbms.pojo.User"/> -->
<package name="cn.abc.entity"/>
</typeAliases>

<environments default="development">
<environment id="development">

<transactionManager type="JDBC"></transactionManager>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${user}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments>

<mappers>
<mapper resource="cn/abc/dao/user/UserMapper.xml"/>
</mappers>

</configuration>

5，编写工具类

MyBatisUtil.java

package cn.abc.util;

import java.io.IOException;
import java.io.InputStream;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class MybatisUtil {
private static  SqlSessionFactory sqlSessionFactory;

public static SqlSessionFactory getSqlSessionFactory() {
try {
InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("加载文件出错");
e.printStackTrace();
}
return sqlSessionFactory;

}

public static SqlSession openSession() {
return getSqlSessionFactory().openSession();
}
}

6,测试mybatis

添加junit jar包

编写测试类

package cn.abc.test;

import org.apache.ibatis.session.SqlSession;
import org.apache.log4j.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import cn.abc.dao.user.UserMapper;
import cn.abc.entity.User;
import cn.abc.util.MybatisUtil;

public class TestMybatis {
private static Logger logger = Logger.getLogger(TestMybatis.class);
private SqlSession sqlSession =  null;
private UserMapper userMapper = null;

@Before
public void setUp() throws Exception {
sqlSession =  MybatisUtil.openSession();
userMapper = sqlSession.getMapper(UserMapper.class);
}

@After
public void tearDown() throws Exception {
sqlSession.close();
}

@Test
public void test() {
User user = userMapper.getUserById(1);
logger.info(user.toString());
}

}

执行测试

好，信息打出来了。Mybatis成功 ，下面开始整合spring  

7，整合spring 创建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:p="http://www.springfra
d03d
mework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd ">
<!-- 引入 -->
<context:property-placeholder location="classpath:jdbc.properties"/>

<!--  数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${driver}"></property>
<property name="url" value="${url}"></property>
<property name="username" value="${user}"></property>
<property name="password" value="${password}"></property>
<property name="initialSize" value="${initialSize}"></property>
<property name="maxActive" value="${maxActive}"></property>
<property name="maxIdle" value="${maxIdle}"></property>
<property name="minIdle" value="${minIdle}"></property>
<property name="maxWait" value="${maxWait}"></property>
<!-- 开启无用链接的回收机制 true 是开启 当前的空闲链接数《2 且当前活动数》最大活动数-3 出发无用连接的回收 -->
<property name="removeAbandoned" value="${removeAbandoned}"></property>
<!-- 无用链接回收机制 -->
<property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}"></property>

<!-- 配置sql心跳 重启数据库 使用新的连接 保证连接池的连接是真实有效的连接 testWhileIdle testOnBorrow testOnreturn
下面的都是sql心跳包 主要是把无用的连接给回收 mysql如果8个小时没有动态，会自己断开连接 -->
<!-- 开启Evict的定时校验，循环校验 -->
<property name="testWhileIdle" value="true"></property>
<!-- 定义事件间隔 单位毫秒 大于0的时候才会开启Evict -->
<property name="timeBetweenEvictionRunsMillis" value="60000"></property>
<!-- 在进行borrowObject处理时，会对拿到的连接进行校验 默认是false -->
<property name="testOnBorrow" value="false"></property>
<!-- 在进行returnObject处理时，会对返回的连接进行校验 默认是false -->
<property name="testOnReturn" value="false"></property>
<!-- 校验使用的sql语句 validationQuery 复杂的校验sql会影响性能 告诉 数据库我还活着 -->
<property name="validationQuery" value="select 1"></property>
<!-- 每次校验所有的连接 -->
<property name="numTestsPerEvictionRun" value="${maxActive}"></property>
</bean>

<!-- 配置SqlSessionFactoryBean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- 引入mybatis的配置 此处应保留mybatis的配置文件，以适应拓展 -->
</bean>
<!-- 配置事务 -->
<!-- 需要  aop tx -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 定义事物管理器 用上面的定义来进行事务处理   这个有问题  不能打开，用到的时候在研究
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="hl*" propagation="REQUIRED" rollback-for="Exception" />

</tx:attributes>
</tx:advice>
-->

<!-- 配置SqlSessionTemplate -->
<!--  <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
</bean> -->

<!-- Dao  将词包下的接口转换为实体类-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.abc.dao"></property>
</bean>
<!-- Service -->
<!-- 扫描注解定义 -->
<context:component-scan base-package="cn.abc"></context:component-scan>

<!-- redis 配置暂缺 -->
</beans>

下面的这个东西是关键，它可以扫描dao接口，转换为bean。比如此例中就是把UserMapper接口转化为了userMapper bean

    <beanclass="org.mybatis.spring.mapper.MapperScannerConfigurer">
       <propertyname="basePackage"value="cn.abc.dao"></property>
    </bean>

8,修改mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

<!-- 通过这个配置文件完成mybatis与数据库的连接 -->
<configuration>

<!-- 引入 database.properties 文件-->
<properties resource="jdbc.properties"/>

<settings>
<!-- 配置mybatis的log实现为LOG4J -->
<setting name="logImpl" value="LOG4J" />
<!-- 设置resultMap的自动映射级别为NONE(禁止自动匹配) -->
<!-- <setting name="autoMappingBehavior" value="NONE" /> -->
</settings>

<!--类型别名-->
<typeAliases>
<!-- <typeAlias alias="User" type="cn.smbms.pojo.User"/> -->
<package name="cn.abc.entity"/>
</typeAliases>
<!--
<environments default="development">
<environment id="development">
配置事务管理，采用JDBC的事务管理
<transactionManager type="JDBC"></transactionManager>
POOLED:mybatis自带的数据源，JNDI:基于tomcat的数据源
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${user}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments>

将mapper文件加入到配置文件中
<mappers>
<mapper resource="cn/smbms/dao/user/UserMapper.xml"/>
</mappers> -->

</configuration>

只保留了一个typeAliases别的都被注释掉了

9创建测试类

package cn.abc.test;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.abc.entity.User;
import cn.abc.service.UserService;

public class TestSpring {
private static Logger logger = Logger.getLogger(TestSpring.class);
@Test
public void test() {
ApplicationContext ctx=new
ClassPathXmlApplicationContext("spring-mybatis.xml");
UserService us =	(UserService) ctx.getBean("userService");
User user = us.getUserById(1);
logger.info(user.toString());
}
}

运行结果

出来了，至此spring+mybatis的整合已经结束了。此时由于mybatis-config文件的修改，TestMybatis已经不能用了

下面整合spring mvc

10，整合spring mvc 创建spring-mvc.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-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/util http://www.springframework.org/schema/util/spring-util-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
<!-- 以annotation的方式  装配controller -->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 使用注解的包，  这个可以扫描controller   包括子集 -->
<context:component-scan base-package="cn.abc.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"></property>
</bean>

</beans>

11，配置web.xml   照图中的路径找，没有文件要自己创建一个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"> <display-name></display-name>
<!-- 加载-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>
<!-- Spring监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<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>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

这个地方有两个关键点context-param 与ContextLoaderListener 这两个东西就把sping的东西整合到web项目了，仔细看看

12，编写controller

package cn.abc.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import cn.abc.entity.User;
import cn.abc.service.UserService;

@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/haha")
public String helloWorld(Model model){
User user = userService.getUserById(1);
model.addAttribute("user", user);
return "hello";
}

}

     13，在下图位置创建文件夹及jsp文件

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'hello.jsp' starting page</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>
${user.name}
</body>
</html>

里面只有一个el表达式

如果有jsp报错   右键项目》properties》java build path》libraries》add lib》service runtime》选择tomcat

14，测试 

在浏览器中输入http://localhost:8080/ssm/haha

就可以看到结果了

这个张三就是从数据库取出来的数据

源码在评论区