SSM框架的简单整合

梦里梦外; 2022-06-08 00:47 190阅读 0赞

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http://blog.csdn.net/zzg19950824/article/details/77916210

抽空搭建了一个SSM的简易框架，目的在于能够描述SSM的搭建流程。

SSM框架由Spring+SpringMVC+mybatis组成，这三个框架是现在比较流行的框架，Spring配合SpringMVC实现了无缝连接，mybatis相对其他的持久层框架更加简洁，实用。对于一般的项目，mybatis基本上足够了。

这三个框架以后有精力会写写详细博客，这里就这样简单介绍了。

# 一.SSM框架所用到的包 #

1.  Spring的jar

spring-aop;spring-core

2.  Mybatis的jar

dbcp;mysql-connector; spring-pesistence,mybatis

3.  Springmvc

Spring-WEB

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# 二.创建一个项目 #

1.  创建web项目，我用的是MyEclipse，这里是在项目栏中右键-new-web Project,

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2.  Project name 可以随意定，看个人情况

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3.  创建完成

# 三.搭建spring框架 #

1.  导入spring的jar

为了清楚，这里导包是一个个导的。

此处导入spring-aop,spring-core

2. 写一个简单的bean.

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3.  编写spring-config.xml

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4.  Junit4测试（出现了bean中的spring success,说明spring框架已经搭建了最简单的IOC功能）

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(JUnit4的使用方法：

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)

5.利用注解进行导包

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在spring-config中加入了context：component-scan后会自动扫描路径下用@Controller，@Service等注解标注的bean

# 四.mybatis框架的搭建 #

1.  导包

dbcp;mysql;mybatis;spring-peresistence

2.  编写jdbc.properties

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3.  编写spring-source.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"
           xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans.xsd">
           
           
           <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
            	<property name="location" value="classpath:config/jdbc.properties"/>  
       	   </bean> 
           
           
           <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"  
            destroy-method="close">  
            <property name="driverClassName" value="${jdbc.driver}" />  
            <property name="url" value="${jdbc.url}" />  
            <property name="username" value="${jdbc.username}" />  
            <property name="password" value="${jdbc.password}" />  
              
            <property name="initialSize" value="${jdbc.initialSize}"></property>  
              
            <property name="maxActive" value="${jdbc.maxActive}"></property>  
              
            <property name="maxIdle" value="${jdbc.maxIdle}"></property>  
              
            <property name="minIdle" value="${jdbc.minIdle}"></property>  
              
            <property name="maxWait" value="${jdbc.maxWait}"></property>  
        </bean>  
           
    </beans>

4.  编写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.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-3.1.xsd    
                            http://www.springframework.org/schema/context    
                            http://www.springframework.org/schema/context/spring-context-3.1.xsd    
                            http://www.springframework.org/schema/mvc    
                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  
        
        
        
                           
       <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       		<property name="dataSource" ref="dataSource"/>
       		<property name="mapperLocations" value="classpath:cn/it/mapper/xml/*.xml"/>
       </bean>                    
       
       
       
       <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
            <property name="basePackage" value="cn.it.mapper" />  
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>  
       </bean>    
       
       
       
       
       <bean id="transactionManager"  
            class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
            <property name="dataSource" ref="dataSource" />  
       </bean>                    
    </beans>

5.  整合(spring-config.xml)

6.  编写相关的类

1)sql语句

UserSql
    //创建表，有id,name,age三个字段
    create table user(
        id varchar(20),
        name varchar(20),
        age varchar(20)
    )charset=utf8;
    
    //插入值
    insert into user (id,name,age) values (1,'小明',20);
    insert into user (id,name,age) values (2,'小李',21);
    insert into user (id,name,age) values (3,'小张',22);

2）model----user.java(实体类，用于存储数据库中表的数据)

public class User {
    	private String id;
    	private String name;
    	private String age;
    	
    	
    	public String getId() {
    		return id;
    	}
    	public void setId(String id) {
    		this.id = id;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getAge() {
    		return age;
    	}
    	public void setAge(String age) {
    		this.age = age;
    	}
    
    
    }

3）mapper----usermapper.java

public interface UserMapper {
    	List<User> getUser();
    }

4)mapper.xml---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.it.mapper.UserMapper" >
    	
    	<select id="getUser" resultType="cn.it.model.User">
    		select * from user
    	</select>
    </mapper>

5)相关service类（因为只是去测试mybatis是否整合成功，所以service足以）

//这是一个service类，这个类被事务管理
    @Service
    @Transactional
    public class UserService {
    	
    	@Resource
    	private UserMapper userMapper;
    	
    	public List<User> getUser(){
    		return (List<User>) userMapper.getUser();
    	}
    }

7.  测试

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# 五.整合springMVC #

1.  整合springMVC包

spring-web.jar

2.  配置spring-mvc.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:context="http://www.springframework.org/schema/context"
    	xmlns:mvc="http://www.springframework.org/schema/mvc"
    	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
    		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
    		">
    		
    	
    	<context:component-scan base-package="cn" />
    	
    	
    	
     	<mvc:annotation-driven />
     	
     	
     	<mvc:resources mapping="/img/**" location="/img/" />
        <mvc:resources mapping="/js/**" location="/js/" />
        <mvc:resources mapping="/css/**" location="/css/" />
        <mvc:resources mapping="/html/**" location="/html/" />
        
        
     	
     	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
    		<property name="prefix" value="/WEB-INF/page/" />
    	    <property name="suffix" value=".jsp" />
        </bean>
    </beans>

3.  配置web.xml(web.xml是服务器的进入接口)

<?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">
        
        
        
        
       	<context-param>
       		<param-name>contextConfigLocation</param-name>
       		<param-value>classpath:config/spring-config.xml</param-value>
       	</context-param>
       	
       	
       	
       	
       	<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:config/spring-mvc.xml</param-value>
       		</init-param>
       		<load-on-startup>1</load-on-startup>
       	</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>

4.  编写jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>  
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>My JSP 'User.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">
    	
    
      </head>
      
      <body>
         <table border="1">
             <tbody>
                 <tr>
                 	 <th>id</th>
                     <th>姓名</th>
                     <th>年龄</th>
                 </tr>
                 
                 <c:if test="${!empty User }">
                     <c:forEach items="${User}" var="list">
                         <tr>
                         	 <td>${list.id }</td>
                             <td>${list.name }</td>
                             <td>${list.age }</td>
                             
                         </tr>                
                     </c:forEach>
                 </c:if>
             </tbody>
         </table>
      </body>
    </html>

5.  修改controller

@Controller
    @RequestMapping("/user")
    public class UserController {
    	
    	/*
    	 public void test(){
    	 System.out.println("spring success");
    	 }
    	 */
    	
    	@Autowired
    	private UserService userService;
    	
    	//requestMapping用于指定映射路径，这里可以看成当路径为/user/findUser时将会被映射到此方法
    	@RequestMapping("findUser")
    	public String getUser(HttpServletRequest request){
    		//用List接收结果
    		List<User> user = userService.getUser();
    		//把结果放到相应的request域中
    		request.setAttribute("User", user);
    		//返回一个视图
    		return "/User";
    	}
    	
    	
    }

6.  测试

开启Tomcat

在网页上输入

http://localhost:8080/spring\_mybatis\_springmvc/user/findUser

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# 六.总结 #

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这个最简单的SSM框架就搭建完毕了，以后我们可以根据这个框架进行各类框架的整合，例如shiro等。

个人搭建框架喜欢一步步来，因为出现错误时可以把范围缩小，更好查找。

全部资料：http://download.csdn.net/download/zzg19950824/9971438

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