SSM框架搭建完整版（spring+springmvc+mybatis）



自己配置了一个SSM框架，打算做个小网站，这里把SSM的配置流程详细的写了出来，方便很少接触这个框架的朋友使用，文中各个资源均免费提供！

一.创建web项目（eclipse）

 File-->new-->Dynamic Web Project (这里我们创建的项目名为SSM)

下面是大致目录结构

 

二. SSM所需jar包。

 jar包链接：https://pan.baidu.com/s/1dTClhO
密码：n4mm

三.整合开始

1.mybatis配置文件（resource/mybatis/SqlMapConfig.xml）

[html] view plain copy print ?

1. <?xml version="1.0" encoding="UTF-8" ?>  
2. <!DOCTYPE configuration  
3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"  
4.         "http://mybatis.org/dtd/mybatis-3-config.dtd">  
5. <configuration>  
6.   
7. </configuration>  

<?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">
<configuration>

</configuration>

2.Dao，mybatis整合spring，通过spring管理

SqlSessionFactory、mapper代理对象

（resource/spring/applicationContext-dao.xml）

[html] view plain copy print ?

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.     xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"  
4.     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"  
5.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
6.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
7.     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
8.     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd  
9.     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">  
10.   
11.     <!-- 数据库连接池 -->  
12.     <!-- 加载配置文件 -->  
13.     <context:property-placeholder location="classpath:*.properties" />  
14.     <!-- 数据库连接池 -->  
15.     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"  
16.         destroy-method="close">  
17.         <property name="url" value="${jdbc.url}" />  
18.         <property name="username" value="${jdbc.username}" />  
19.         <property name="password" value="${jdbc.password}" />  
20.         <property name="driverClassName" value="${jdbc.driver}" />  
21.         <property name="maxActive" value="10" />  
22.         <property name="minIdle" value="5" />  
23.     </bean>  
24.     <!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->  
25.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
26.         <!-- 数据库连接池 -->  
27.         <property name="dataSource" ref="dataSource" />  
28.         <!-- 加载mybatis的全局配置文件 -->  
29.         <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />  
30.     </bean>  
31.     <!-- 自动扫描 将Mapper接口生成代理注入到Spring -->  
32.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
33.         <property name="basePackage" value="com.mapper" />  
34.     </bean>  
35. </beans>  

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

	<!-- 数据库连接池 -->
	<!-- 加载配置文件 -->
	<context:property-placeholder location="classpath:*.properties" />
	<!-- 数据库连接池 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		destroy-method="close">
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="maxActive" value="10" />
		<property name="minIdle" value="5" />
	</bean>
	<!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 数据库连接池 -->
		<property name="dataSource" ref="dataSource" />
		<!-- 加载mybatis的全局配置文件 -->
		<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
	</bean>
	<!-- 自动扫描 将Mapper接口生成代理注入到Spring -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.mapper" />
	</bean>
</beans>

这里用的是阿里的连接池，当然也可以用c3p0，个人建议用阿里

3. 所有的实现类都放到spring容器中管理。由spring创建数据库连接池，并有spring管理实务。

（resource/spring/applicationContext-service.xml）

[html] view plain copy print ?

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.     xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"  
4.     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"  
5.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
6.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
7.     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
8.     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd  
9.     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">  
10.           
11.         <!-- spring自动去扫描base-pack下面或者子包下面的java文件-->  
12. <span style="white-space: pre;">        </span><!--管理Service实现类-->  
13.         <context:component-scan base-package="com.service"/>  
14.         .  
15. </beans>  

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
		
		<!-- spring自动去扫描base-pack下面或者子包下面的java文件-->
		<!--管理Service实现类-->
		<context:component-scan base-package="com.service"/>
		.
</beans>

配置spring管理实务

 （resource/spring/applicationContext-trans.xml）

[html] view plain copy print ?

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.     xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"  
4.     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"  
5.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
6.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
7.     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
8.     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd  
9.     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">  
10.     <!-- 事务管理器 -->  
11.     <bean id="transactionManager"  
12.         class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
13.         <!-- 数据源 -->  
14.         <property name="dataSource" ref="dataSource" />  
15.     </bean>  
16.     <!-- 通知 -->  
17.     <tx:advice id="txAdvice" transaction-manager="transactionManager">  
18.         <tx:attributes>  
19.             <!-- 传播行为 -->  
20.             <tx:method name="save*" propagation="REQUIRED" />  
21.             <tx:method name="insert*" propagation="REQUIRED" />  
22.             <tx:method name="add*" propagation="REQUIRED" />  
23.             <tx:method name="create*" propagation="REQUIRED" />  
24.             <tx:method name="delete*" propagation="REQUIRED" />  
25.             <tx:method name="update*" propagation="REQUIRED" />  
26.             <tx:method name="find*" propagation="SUPPORTS" read-only="true" />  
27.             <tx:method name="select*" propagation="SUPPORTS" read-only="true" />  
28.             <tx:method name="get*" propagation="SUPPORTS" read-only="true" />  
29.         </tx:attributes>  
30.     </tx:advice>  
31.     <!-- 切面 -->  
32.     <aop:config>  
33.         <aop:advisor advice-ref="txAdvice"  
34.             pointcut="execution(* com.service.*.*(..))" />  
35.     </aop:config>  
36. </beans>  

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	<!-- 事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	<!-- 通知 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<!-- 传播行为 -->
			<tx:method name="save*" propagation="REQUIRED" />
			<tx:method name="insert*" propagation="REQUIRED" />
			<tx:method name="add*" propagation="REQUIRED" />
			<tx:method name="create*" propagation="REQUIRED" />
			<tx:method name="delete*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="select*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
		</tx:attributes>
	</tx:advice>
	<!-- 切面 -->
	<aop:config>
		<aop:advisor advice-ref="txAdvice"
			pointcut="execution(* com.service.*.*(..))" />
	</aop:config>
</beans>

4. Springmvc整合spring框架，由springmvc管理controller

（resource/spring/springmvc.xml）

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"  
4.     xmlns:context="http://www.springframework.org/schema/context"  
5.     xmlns:mvc="http://www.springframework.org/schema/mvc"  
6.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  
7.         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd  
8.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">  
9.       
10.     <!-- 扫描controller -->  
11.     <context:component-scan base-package="com.controller" />  
12.       
13.     <!-- Spring 来扫描指定包下的类，并注册被@Component，@Controller，@Service，@Repository等注解标记的组件 -->  
14.     <mvc:annotation-driven />  
15.       
16.     <!-- 配置SpringMVC的视图解析器-->  
17.     <bean  
18.         class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
19.         <property name="prefix" value="/WEB-INF/jsp/" />  
20.         <property name="suffix" value=".jsp" />  
21.     </bean>  
22. </beans>  

<?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: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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
	
	<!-- 扫描controller -->
	<context:component-scan base-package="com.controller" />
	
	<!-- Spring 来扫描指定包下的类，并注册被@Component，@Controller，@Service，@Repository等注解标记的组件 -->
	<mvc:annotation-driven />
	
	<!-- 配置SpringMVC的视图解析器-->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

5. 2中加载的属性配置文件（dbconfig.properties）

根据自己的数据库更改用户名密码以及库

[html] view plain copy print ?

1. jdbc.driver=com.mysql.jdbc.Driver  
2. jdbc.url=jdbc:mysql://localhost:3306/test1?characterEncoding=utf-8  
3. jdbc.username=root  
4. jdbc.password=123456  

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test1?characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456

6. 配置log4j

（log4j.properties）

[plain] view plain copy print ?

1. log4j.rootLogger=error,CONSOLE,A  
2. log4j.addivity.org.apache=false  
3.   
4. log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender  
5. log4j.appender.CONSOLE.Threshold=error  
6. log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} -%-4r [%t] %-5p  %x - %m%n  
7. log4j.appender.CONSOLE.Target=System.out  
8. log4j.appender.CONSOLE.Encoding=gbk  
9. log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout  
10.   
11.   
12. log4j.appender.A=org.apache.log4j.DailyRollingFileAppender    
13. log4j.appender.A.File=${catalina.home}/logs/FH_log/PurePro_  
14. log4j.appender.A.DatePattern=yyyy-MM-dd'.log'  
15. log4j.appender.A.layout=org.apache.log4j.PatternLayout    
16. log4j.appender.A.layout.ConversionPattern=[FH_sys]  %d{yyyy-MM-dd HH\:mm\:ss} %5p %c{1}\:%L \: %m%n  

log4j.rootLogger=error,CONSOLE,A
log4j.addivity.org.apache=false

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=error
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} -%-4r [%t] %-5p  %x - %m%n
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.Encoding=gbk
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout


log4j.appender.A=org.apache.log4j.DailyRollingFileAppender  
log4j.appender.A.File=${catalina.home}/logs/FH_log/PurePro_
log4j.appender.A.DatePattern=yyyy-MM-dd'.log'
log4j.appender.A.layout=org.apache.log4j.PatternLayout  
log4j.appender.A.layout.ConversionPattern=[FH_sys]  %d{yyyy-MM-dd HH\:mm\:ss} %5p %c{1}\:%L \: %m%n

 (log4j.xml)

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">  
3. <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">  
4.   
5.     <!-- Appenders -->  
6.     <appender name="console" class="org.apache.log4j.ConsoleAppender">  
7.         <param name="Target" value="System.out" />  
8.         <layout class="org.apache.log4j.PatternLayout">  
9.             <param name="ConversionPattern" value="%d{yyyy HH:mm:ss} %-5p %c - %m%n" />  
10.         </layout>  
11.     </appender>  
12.       
13.     <!-- Application Loggers -->  
14.     <logger name="com">  
15.         <level value="error" />  
16.     </logger>  
17.       
18.     <!-- 3rdparty Loggers -->  
19.     <logger name="org.springframework.core">  
20.         <level value="error" />  
21.     </logger>   
22.       
23.     <logger name="org.springframework.beans">  
24.         <level value="error" />  
25.     </logger>  
26.       
27.     <logger name="org.springframework.context">  
28.         <level value="error" />  
29.     </logger>  
30.   
31.     <logger name="org.springframework.web">  
32.         <level value="error" />  
33.     </logger>  
34.   
35.     <logger name="org.springframework.jdbc">  
36.         <level value="error" />  
37.     </logger>  
38.   
39.     <logger name="org.mybatis.spring">  
40.         <level value="error" />  
41.     </logger>  
42.     <logger name="java.sql">  
43.         <level value="error" />  
44.     </logger>  
45.     <!-- Root Logger -->  
46.     <root>  
47.         <priority value="error" />  
48.         <appender-ref ref="console" />  
49.     </root>  
50.       
51. </log4j:configuration>  

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

	<!-- Appenders -->
	<appender name="console" class="org.apache.log4j.ConsoleAppender">
		<param name="Target" value="System.out" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="%d{yyyy HH:mm:ss} %-5p %c - %m%n" />
		</layout>
	</appender>
	
	<!-- Application Loggers -->
	<logger name="com">
		<level value="error" />
	</logger>
	
	<!-- 3rdparty Loggers -->
	<logger name="org.springframework.core">
		<level value="error" />
	</logger>	
	
	<logger name="org.springframework.beans">
		<level value="error" />
	</logger>
	
	<logger name="org.springframework.context">
		<level value="error" />
	</logger>

	<logger name="org.springframework.web">
		<level value="error" />
	</logger>

	<logger name="org.springframework.jdbc">
		<level value="error" />
	</logger>

	<logger name="org.mybatis.spring">
		<level value="error" />
	</logger>
	<logger name="java.sql">
		<level value="error" />
	</logger>
	<!-- Root Logger -->
	<root>
		<priority value="error" />
		<appender-ref ref="console" />
	</root>
	
</log4j:configuration>

 SSM框架整合完成，至于mybatis逆向工程生成的mapper.xml和pojo请放到第一张图的目录下

逆向工程项目我会贴出链接，解压导入改路径运行main方法就会自动生成了，注意配置生成的路径

逆向工程链接： 链接：https://pan.baidu.com/s/1ht4x3jI 密码：tvad

到这里项目整合完成，接下来是测试！

 UserController.java

[java] view plain copy print ?

1. package com.controller;  
2.   
3. import javax.annotation.Resource;  
4. import javax.servlet.http.HttpServletRequest;  
5. import org.springframework.stereotype.Controller;  
6. import org.springframework.web.bind.annotation.RequestMapping;  
7. import org.springframework.web.servlet.ModelAndView;  
8. import com.pojo.User;  
9. import com.service.UserService;  
10.   
11. @Controller  
12. @RequestMapping("/user")    
13. public class UserController {  
14.       
15.     @Resource(name="userService")  
16.     private UserService userService;  
17.     /** 
18.      * 根据id查询 
19.      */  
20.     @RequestMapping(value="/queryById")  
21.     public ModelAndView queryById(HttpServletRequest request){  
22.         ModelAndView mv = new ModelAndView();  
23.         String id = request.getParameter("id");  
24.         try{  
25.             User var = userService.findById(id);  
26.             mv.setViewName("index");  
27.             mv.addObject("var", var);  
28.         } catch(Exception e){  
29.         }  
30.         return mv;  
31.     }  
32. }  

package com.controller;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.pojo.User;
import com.service.UserService;

@Controller
@RequestMapping("/user")  
public class UserController {
	
	@Resource(name="userService")
	private UserService userService;
	/**
	 * 根据id查询
	 */
	@RequestMapping(value="/queryById")
	public ModelAndView queryById(HttpServletRequest request){
		ModelAndView mv = new ModelAndView();
		String id = request.getParameter("id");
		try{
			User var = userService.findById(id);
			mv.setViewName("index");
			mv.addObject("var", var);
		} catch(Exception e){
		}
		return mv;
	}
}

UserService.java

[java] view plain copy print ?

1. package com.service;  
2.   
3. import javax.annotation.Resource;  
4.   
5. import org.springframework.stereotype.Service;  
6.   
7. import com.mapper.UserMapper;  
8. import com.pojo.User;  
9.   
10. @Service("userService")  
11. public class UserService {  
12.     @Resource  
13.     private UserMapper dao;  
14.     /* 
15.     * 通过id获取数据 
16.     */  
17.     public User findById(String id)throws Exception{  
18.         return (User)dao.selectByPrimaryKey(id);  
19.     }  
20. }  

package com.service;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.mapper.UserMapper;
import com.pojo.User;

@Service("userService")
public class UserService {
	@Resource
	private UserMapper dao;
	/*
	* 通过id获取数据
	*/
	public User findById(String id)throws Exception{
		return (User)dao.selectByPrimaryKey(id);
	}
}

为节省篇幅，更快的搭建成功，这里只写了一个方法，根据id查询数据

WebContent/index.jsp

[html] view plain copy print ?

1. <%@ page language="java" contentType="text/html; charset=utf-8"  
2.     pageEncoding="utf-8"%>  
3. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
4. <%  
5.     String path = request.getContextPath();  
6.     String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
7. %>  
8. <html>  
9. <head>  
10. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">  
11. <title>查询用户</title>  
12. </head>  
13. <body>  
14.     <form action="user/queryById.do" method="post">  
15.         输入要查询的id:   <input type="text" name="id" value="123456"/>  
16.         <button type="submit">提交</button>  
17.     </form>  
18. </body>  
19. </html>  

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
	String path = request.getContextPath();
	String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>查询用户</title>
</head>
<body>
	<form action="user/queryById.do" method="post">
		输入要查询的id:	<input type="text" name="id" value="123456"/>
		<button type="submit">提交</button>
	</form>
</body>
</html>

  WebContent/WEB-INF/jsp/index.jsp

[html] view plain copy print ?

1. <%@ page language="java" contentType="text/html; charset=utf-8"  
2.     pageEncoding="utf-8"%>  
3. <%@page import="com.pojo.*"%>  
4. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
5. <html>  
6. <head>  
7. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">  
8. <title>Insert title here</title>  
9. <style type="text/css">  
10.     .td td{  
11.         width: 100px;  
12.     }  
13.     .table{  
14.         text-align: center;  
15.         margin: 0 auto;  
16.     }  
17. </style>  
18. </head>  
19. <body>  
20. <%  
21.     User user = ((User)request.getAttribute("var"));  
22. %>  
23.   
24.     <table class="table">  
25.         <tr class="td">  
26.             <td>ID</td>  
27.             <td>用户名</td>  
28.             <td>密码</td>  
29.             <td style="width: 200px">公司</td>  
30.             <td>年龄</td>  
31.             <td>性别</td>  
32.         </tr>  
33. <%if(user!=null){%>  
34.         <tr class="td">  
35.             <td><%=user.getId()%></td>  
36.             <td><%=user.getUsername()%></td>  
37.             <td><%=user.getPassword()%></td>  
38.             <td><%=user.getCompany()%></td>  
39.             <td><%=user.getAge()%></td>  
40.             <td><%=user.getSex()==1?"男":"女"%></td>  
41.         </tr>  
42.     <%}else{ %>  
43.         <tr class="td">  
44.             <td style="color: red;">暂无相关数据</td>  
45.         </tr>  
46. <%} %>  
47.     </table>  
48.   
49. </body>  
50. </html>  

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@page import="com.pojo.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
<style type="text/css">
	.td td{
		width: 100px;
	}
	.table{
		text-align: center;
		margin: 0 auto;
	}
</style>
</head>
<body>
<%
	User user = ((User)request.getAttribute("var"));
%>

	<table class="table">
		<tr class="td">
			<td>ID</td>
			<td>用户名</td>
			<td>密码</td>
			<td style="width: 200px">公司</td>
			<td>年龄</td>
			<td>性别</td>
		</tr>
<%if(user!=null){%>
		<tr class="td">
			<td><%=user.getId()%></td>
			<td><%=user.getUsername()%></td>
			<td><%=user.getPassword()%></td>
			<td><%=user.getCompany()%></td>
			<td><%=user.getAge()%></td>
			<td><%=user.getSex()==1?"男":"女"%></td>
		</tr>
	<%}else{ %>
		<tr class="td">
			<td style="color: red;">暂无相关数据</td>
		</tr>
<%} %>
	</table>

</body>
</html>

启动项目，输入 localhost:8080/SSM 访问

 项目链接：https://pan.baidu.com/s/1htxBSIK 密码：ooxq   文中链接失效+Q:171727855  补发

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