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SSM

u 三大框架基本概念

spring、SpringMVC、Mybatis

u 整合思路
u 环境准备
u 工程结构
u SPRING + SPING MVC + MYBATIS 三大框架整合
- ü Mybatis和spring进行整合
- ü Spring整合service
- ü 整合springMVC
- ü 配置前端控制器
- ü 编写登录页面
- ü 数据库配置和日志配置
- ü 项目部署

1 三大框架基本概念

spring：

Spring是一个开源框架，Spring是于2003 年兴起的一个轻量级的Java 开发框架，由Rod Johnson 在其著作Expert One-On-One J2EE Development and Design中阐述的部分理念和原型衍生而来。它是为了解决企业应用开发的复杂性而创建的。Spring使用基本的JavaBean来完成以前只可能由EJB完成的事情。然而，Spring的用途不仅限于服务器端的开发。从简单性、可测试性和松耦合的角度而言，任何Java应用都可以从Spring中受益。简单来说，Spring是一个轻量级的控制反转（IoC）和面向切面（AOP）的容器框架。

SpringMVC：

Spring MVC属于SpringFrameWork的后续产品，已经融合在Spring Web Flow里面。Spring MVC 分离了控制器、模型对象、分派器以及处理程序对象的角色，这种分离让它们更容易进行定制。

Mybatis：

MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code，并且改名为MyBatis 。MyBatis是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects（DAO）MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射，将接口和Java的POJOs（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。

2 整合思路

SSM系统架构：

spring将各层进行整合

通过spring管理持久层的mapper(相当于dao接口)
通过spring管理业务层service，service中可以调用mapper接口。
spring进行事务控制。
通过spring管理表现层Handler，Handler中可以调用service接口。

mapper、service、Handler都是javabean。

第一步：整合dao层

ü mybatis和spring整合，通过spring管理mapper接口。

ü 使用mapper的扫描器自动扫描mapper接口在spring中进行注册。

第二步：整合service层

ü 通过spring管理service接口。

ü 使用配置方式将service接口配置在spring配置文件中。

ü 实现事务控制。

第三步：整合springMVC

ü 由于springMVC是spring的模块，不需要和spring整合，直接把springMVC加入到项目中即可。

3. 示例：

2. login.jsp

<%@ 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 'login.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>
       <form action="<%=path %>/login.action" method="post">
           用户名:<input type="text" name="username" ><br/>
           密码:<input type="text" name="password"><br/>
           <input type="submit" value="提交">
       </form>
       ${message }
  </body>
</html>

3. success.jsp

<%@ 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 'sucess.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>
    id:${user.id }<br>
    username:${user.username }<br/>
    password:${user.password }<br/>
  </body>
</html>

4. web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    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_3_0.xsd">
  <display-name></display-name>    
  
  <!-- 加载Spring容器 -->
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:/spring/applicationContext-*.xml</param-value>
  </context-param>
  <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
  <!-- springmvc前端控制器 -->
  <servlet>
      <servlet-name>springmvc_rest</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 初始化时加载配置文件 -->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:/spring/springmvc.xml</param-value>
    </init-param>
    <!-- 表示容器在启动时立即加载Servlet -->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc_rest</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  <!-- 解决post请求的中文乱码问题 -->
  <filter>
      <filter-name>CharacterEncodingFilter</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <init-param>
          <param-name>encoding</param-name>
          <param-value>utf-8</param-value>
      </init-param>
  </filter>
  <filter-mapping>
          <filter-name>CharacterEncodingFilter</filter-name>
          <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

5. springmvc.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.springframework.org/schema/p"
    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.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/aop  
                        http://www.springframework.org/schema/aop/spring-aop.xsd
                        http://www.springframework.org/schema/tx  
                        http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 指定需要扫描的包 -->
    <context:component-scan base-package="com.inspur.ssm.*"></context:component-scan>

    <!-- 使用mvc注解驱动，代替注解映射器和注解适配器配置 -->
    <mvc:annotation-driven></mvc:annotation-driven>
    
    
    <!-- 视图解析器  -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

6. (1)applicationContext-dao.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.springframework.org/schema/p"  
    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.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/aop  
                        http://www.springframework.org/schema/aop/spring-aop.xsd
                        http://www.springframework.org/schema/tx  
                        http://www.springframework.org/schema/tx/spring-tx.xsd"> 
    <!-- 加载配置文件db.properties中的内容，db.properties文件中key命名要有一定命名规则 -->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <!-- 配置Mybatis工厂:sqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 指定核心配置文件位置：加载mybatis的配置文件 -->
        <property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml"></property>
    </bean>
    
    <!-- Mapper代理开发（基于MapperScannerConfigurer）:mapper批量扫描 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.inspur.ssm.mapper"></property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>

    

</beans>

　(2)applicationContext-transaction.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.springframework.org/schema/p"
    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.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/aop  
                        http://www.springframework.org/schema/aop/spring-aop.xsd
                        http://www.springframework.org/schema/tx  
                        http://www.springframework.org/schema/tx/spring-tx.xsd">
      <!-- 事务管理器，依赖于数据源:事务管理器，对mybatis操作数据库的事务控制，spring使用jdbc的事务控制类 -->
      <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
              <!-- 数据源dataSource在 applictaionContext-dao.xml配置了 -->
              <property name="dataSource" ref="dataSource"></property>
      </bean>                   
                        
</beans>

7. sqlMapConfig.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">
<configuration>
    <!-- 配置别名 -->
    <typeAliases>
        <!-- 批量扫描别名 -->
        <package name="com.inspur.ssm.pojo"/>
    </typeAliases>
</configuration>

8. LoginController.java

package com.inspur.ssm.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

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

import com.inspur.ssm.pojo.Userssm;
import com.inspur.ssm.service.LoginService;


@Controller
public class LoginController {
    @Autowired
    private LoginService loginService;
    //登录
    @RequestMapping("/login")
    public String login(HttpServletRequest request,Userssm userssm) throws Exception{
        Userssm user=null;
        try {
            user=loginService.findUser(userssm);
            
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
            request.setAttribute("message", e.getMessage());
        }
        if(user!=null){
            HttpSession session = request.getSession();
            //在session中保存用户信息
            session.setAttribute("user", user);
            //重定向到登录成功页面
            return "success";
        }
        return "login";
        
    }

}

9. UserssmMapper.java

package com.inspur.ssm.mapper;

import com.inspur.ssm.pojo.Userssm;

public interface UserssmMapper {
    Userssm findUser(Userssm userssmQuery);

}

10. UsessmrMapper.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.inspur.ssm.mapper.UserssmMapper">
    <select id="findUser" resultType="userssm" parameterType="userssm">
        select * from userssm where username=#{username} and password=#{password}
    </select>
</mapper>

11. Userssm.java

package com.inspur.ssm.pojo;

public class Userssm {
    private String id;
    private String username;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    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;
    }
    private String password;
    

}

12. LoginService.java

package com.inspur.ssm.service;

import javax.annotation.Resource;

import com.inspur.ssm.pojo.Userssm;

@Resource
public interface LoginService {
    //查询用户列表
    public Userssm findUser(Userssm userssm) throws Exception;

}

13. LoginServiceImpl.java

package com.inspur.ssm.serviceImpl;

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

import com.inspur.ssm.mapper.UserssmMapper;
import com.inspur.ssm.pojo.Userssm;
import com.inspur.ssm.service.LoginService;

@Service("loginService")
public class LoginServiceImpl implements LoginService {
    @Autowired
    private UserssmMapper userssmMapper;
    @Override
    public Userssm findUser(Userssm userssmQuery) throws Exception {
        // TODO Auto-generated method stub
        Userssm userssm = userssmMapper.findUser(userssmQuery);
        if(userssm==null){
            throw new Exception("用户信息不存在");
        }else{
            return userssm;
        }
    }

}

14. db.properties

jdbc.driver=oracle.jdbc.driver.OracleDriver
jdbc.url=jdbc:oracle:thin:@localhost:1521:inspur
jdbc.username=scott
jdbc.password=tiger

15. log4j.properties

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p [%t] %c{1}:%L - %m%n
#在开发环境下日志级别要设置成DEBUG，生产环境设置成info或error
log4j.rootLogger=DEBUG, stdout

4. 对应数据库语言

create table USERSSM
(
  ID   NUMBER(6) not null,
  userNAME VARCHAR2(100) not null,
  role VARCHAR2(10),
  realname VARCHAR2(10),
  password VARCHAR2(10)

)
select * from userssm for update

5. 浏览器运行结果

查询成功：

查询失败：

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原文地址：https://www.cnblogs.com/sunxiaoyan/p/9227425.html