SSM框架实例（用户登录功能）*需考虑tomcat与jdk版本兼容性问题
第一步：新建一个web工程 First，导入搭建SSM需要的jar包到WebContent\WEB-INF\lib。
第二步：创建需要的类包controller、mapper、pojo、service、serviceImpl;
1.controller包中放控制层java类：
Login.java
@Controller//注解
public class Login {
//@Autowired可以对成员变量、方法和构造函数进行标注，来完成自动装配的工作
@Autowired//标注，注意这里的是接口，不是具体的实现类
public LoginService service;
@RequestMapping("/login")//映射地址可随意定义
private String login(String userName,String passWord){
User user=service.login(userName, passWord);
if(user!=null){
return "success";//返回jsp的文件名，不需要前缀和后缀，在springmvc.xml配置了前缀和后缀即可
}
return "fail";
}
}
2.mapper包中放dao层java接口和配置文件：
接口名称与相应的配置文件名一致，配置文件中的id对应接口中的方法名
配置文件的namespace就是对应接口的路径
LoginMapper.java
public interface LoginMapper {
//登陆
public User login(String userName,String passWord);
}
LoginMapper.xml
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
select * from user where userName=#{0} and passWord=#{1}
3.pojo包中放置javabean：
User.java
public class User {
private String userName;
private String passWord;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassWord() {
return passWord;
}
public void setPassWord(String passWord) {
this.passWord = passWord;
}
}
4.service包中放业务层接口，同mapper
LoginService.java
public interface LoginService {
//登陆
public User login(String userName,String passWord);
}
5.serviceImpl包中放业务层对应接口的实现类
LoginServiceImpl.java
public class LoginServiceImpl implements LoginService{
@Autowired
public LoginMapper mapper;
@Override
public User login(String userName, String passWord) {
User user=mapper.login(userName, passWord);
return user;
}
}
第三步：创建视图层，在WebContent\WEB-INF 创建文件夹view存放jsp页面（不能通过浏览器直接访问）
1.fail.jsp
2.success.jsp
在WebContent下创建login.jsp（可通过浏览器直接访问）
注意事项：form表单的action必须与控制层相应controller中相应的方法的@RequestMapping的值一致，
控件的name与对应方法的形参一致。
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
Login
第四步：创建一个数据源文件夹，放置SSM相关的配置文件
1.sqlMapConfig.xml 配置文件
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
2.applicationContext-dao.xml 配置文件
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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
3.applicationContext-service.xml 配置文件
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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
4.applicationContext-transaction.xml 配置文件
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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> 5.springmvc.xml 配置文件 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-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 "> 第五步：配置web.xml文件 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 第六步：将工程部署到tomcat，启动服务，通过http://localhost:8080/First/login.jsp链接到登陆页面。