基於Maven的SSM框架搭建

Maven + Spring + Spring MVC + Mybatis + MySQL整合SSM框架

1.數據庫准備

本文主要想實現SSM框架的搭建，並基於該框架實現簡單的登錄功能，那么先新建一張user_t表：

DROP TABLE IF EXISTS `user_t`;  
  
CREATE TABLE `user_t` (  
  `id` INT(11) NOT NULL AUTO_INCREMENT,  
  `user_name` VARCHAR(40) NOT NULL,  
  `password` VARCHAR(255) NOT NULL,  
  `age` INT(4) NOT NULL,  
  PRIMARY KEY (`id`)  
) ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;  

然后再插入一條數據：

INSERT  INTO `user_t`(`id`,`user_name`,`password`,`age`) VALUES (1,'測試','sfasgfaf',24);

為了簡單起見，密碼暫時先用明文，后面框架搭建成功后在改為MD5加密。

那么查看下user_login表的內容：

mysql> select * from user_t;
+----+-----------+----------+-----+
| id | user_name | password | age |
+----+-----------+----------+-----+
|  1 | 測試      | sfasgfaf |  24 |
+----+-----------+----------+-----+
1 row in set (0.00 sec)

2.Maven Web項目創建

新建一個Maven Project，然后輸入Group Id和Artifact Id，點擊Finish就完成了。

3.開始整合Spring Spring MVC Mybatis

用過Maven的都知道，有了Maven就沒必要去網上下載一對jar文件然后自己去管理，直接在pom.xml中添加依賴就可以：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>20171117</groupId>
 <artifactId>SSM</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>SSM Maven Webapp</name>
  <url>http://maven.apache.org</url>
  
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.3.2.RELEASE</version>
      <relativePath></relativePath>
  </parent>
  
   <properties>  
        <!-- spring版本號 -->  
        <spring.version>4.0.2.RELEASE</spring.version>  
        <!-- mybatis版本號 -->  
        <mybatis.version>3.2.6</mybatis.version>  
        <!-- log4j日志文件管理包版本 -->  
        <slf4j.version>1.7.7</slf4j.version>  
        <log4j.version>1.2.17</log4j.version>  
    </properties>  
  
    <dependencies>  
    <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.2</version>
</dependency>
        <dependency>  
            <groupId>junit</groupId>  
            <artifactId>junit</artifactId>  
            <version>4.11</version>  
            <!-- 表示開發的時候引入，發布的時候不會加載此包 -->  
            <scope>test</scope>  
        </dependency>  
        <!-- spring核心包 -->  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-core</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-web</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-oxm</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-tx</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-jdbc</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-webmvc</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-aop</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-context-support</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-test</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <!-- mybatis核心包 -->  
        <dependency>  
            <groupId>org.mybatis</groupId>  
            <artifactId>mybatis</artifactId>  
            <version>${mybatis.version}</version>  
        </dependency>  
        <!-- mybatis/spring包 -->  
        <dependency>  
            <groupId>org.mybatis</groupId>  
            <artifactId>mybatis-spring</artifactId>  
            <version>1.2.2</version>  
        </dependency>  
        <!-- 導入java ee jar 包 -->  
        <dependency>  
            <groupId>javax</groupId>  
            <artifactId>javaee-api</artifactId>  
            <version>7.0</version>  
        </dependency>  
        <!-- 導入Mysql數據庫鏈接jar包 -->  
        <dependency>  
            <groupId>mysql</groupId>  
            <artifactId>mysql-connector-java</artifactId>  
            <version>5.1.30</version>  
        </dependency>  
        <!-- 導入dbcp的jar包，用來在applicationContext.xml中配置數據庫 -->  
        <dependency>  
            <groupId>commons-dbcp</groupId>  
            <artifactId>commons-dbcp</artifactId>  
            <version>1.2.2</version>  
        </dependency>  
        <!-- JSTL標簽類 -->  
        <dependency>  
            <groupId>jstl</groupId>  
            <artifactId>jstl</artifactId>  
            <version>1.2</version>  
        </dependency>  
        <!-- 日志文件管理包 -->  
        <!-- log start -->  
        <dependency>  
            <groupId>log4j</groupId>  
            <artifactId>log4j</artifactId>  
            <version>${log4j.version}</version>  
        </dependency>  
          
          
        <!-- 格式化對象，方便輸出日志 -->  
        <dependency>  
            <groupId>com.alibaba</groupId>  
            <artifactId>fastjson</artifactId>  
            <version>1.1.41</version>  
        </dependency>  
  
  
        <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-api</artifactId>  
            <version>${slf4j.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-log4j12</artifactId>  
            <version>${slf4j.version}</version>  
        </dependency>  
        <!-- log end -->  
        <!-- 映入JSON -->  
        <dependency>  
            <groupId>org.codehaus.jackson</groupId>  
            <artifactId>jackson-mapper-asl</artifactId>  
            <version>1.9.13</version>  
        </dependency>  
        <!-- 上傳組件包 -->  
        <dependency>  
            <groupId>commons-fileupload</groupId>  
            <artifactId>commons-fileupload</artifactId>  
            <version>1.3.1</version>  
        </dependency>  
        <dependency>  
            <groupId>commons-io</groupId>  
            <artifactId>commons-io</artifactId>  
            <version>2.4</version>  
        </dependency>  
        <dependency>  
            <groupId>commons-codec</groupId>  
            <artifactId>commons-codec</artifactId>  
            <version>1.9</version>  
        </dependency>  
    </dependencies>
  <build>
    <finalName>Test</finalName>
  </build>
</project>

3.1Spring和Mybatis的整合

3.1.1創建數據庫屬性文件jdbc.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://10.0.20.252:3306/mybatis
username=root
password=Free-Wi11
initialSize=0
maxActive=20
maxIdle=20 
minIdle=1 
maxWait=60000

3.1.2創建spring-mybatis配置文件

這個文件就是用來完成spring和mybatis的整合的。這里面也沒有多少行配置，主要就是自動掃描，自動注入，配置數據庫，詳細配置如下：

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">  
    <!-- 自動掃描 -->  
    <context:component-scan base-package="com.cn.hnust" />  
    <!-- 引入配置文件 -->  
    <bean id="propertyConfigurer"  
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
        <property name="location" value="classpath:jdbc.properties" />  
    </bean>  
  
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"  
        destroy-method="close">  
        <property name="driverClassName" value="${driver}" />  
        <property name="url" value="${url}" />  
        <property name="username" value="${username}" />  
        <property name="password" value="${password}" />  
        <!-- 初始化連接大小 -->  
        <property name="initialSize" value="${initialSize}"></property>  
        <!-- 連接池最大數量 -->  
        <property name="maxActive" value="${maxActive}"></property>  
        <!-- 連接池最大空閑 -->  
        <property name="maxIdle" value="${maxIdle}"></property>  
        <!-- 連接池最小空閑 -->  
        <property name="minIdle" value="${minIdle}"></property>  
        <!-- 獲取連接最大等待時間 -->  
        <property name="maxWait" value="${maxWait}"></property>  
    </bean>  
  
    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->  
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
        <property name="dataSource" ref="dataSource" />  
        <!-- 自動掃描mapping.xml文件 -->  
        <property name="mapperLocations" value="classpath:com/cn/hnust/mapping/*.xml"></property>  
    </bean>  
  
    <!-- DAO接口所在包名，Spring會自動查找其下的類 -->  
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
        <property name="basePackage" value="com.cn.hnust.dao" />  
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>  
    </bean>  
  
    <!-- (事務管理)transaction manager, use JtaTransactionManager for global tx -->  
    <bean id="transactionManager"  
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
        <property name="dataSource" ref="dataSource" />  
    </bean>  
  
</beans>

3.1.3日志的輸出配置

為了方便調試，一般都會使用日志來輸出信息，Log4j是Apache的一個開放源代碼項目，通過使用Log4j，我們可以控制日志信息輸送的目的地是控制台，文件，GUI組件，甚至是套接口服務器，NT的事件記錄器，UNIX Syslog守護進程等；我們也可以控制每一條日志的輸出格式；通過定義每一條日志信息的級別，我們能夠更加細致的控制日志的生成過程。

Log4j的配置很簡單，而且也是通用的，下面給出一個基本的配置，換到其他項目中也無需做多大的調整。

下面給出配置文件目錄：

log4j.properties

log4j.rootLogger=INFO,Console,File   
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.Target=System.out
log4j.appender.Console.layout = org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n   
log4j.appender.File = org.apache.log4j.RollingFileAppender    
log4j.appender.File.File = logs/ssm.log  
log4j.appender.File.MaxFileSize = 10MB  
log4j.appender.File.Threshold = ALL  
log4j.appender.File.layout = org.apache.log4j.PatternLayout  
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n

3.1.4JUnit測試

經過以上步驟，我們已經完成了Spring和Mybatis的整合，這樣就可以編寫一段測試代碼來檢驗Spring和Mybatis是否整合成功了。

3.1.4.1創建實體類User

User.java

package com.cn.hnust.pojo;

public class User {
    private int id;
    private String user_name;
    private String password;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUser_name() {
        return user_name;
    }
    public void setUser_name(String user_name) {
        this.user_name = user_name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
    
}

3.1.4.2創建Dao接口，UserDao

UserDao.java

package com.cn.hnust.dao;

import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import com.cn.hnust.pojo.User;
@Repository
public interface UserDao {
//    @Select("select * from user_t where id=#{userId}")
    public User selectByPrimaryKey(int userId);
}

3.1.4.3User類與數據庫user_t表的映射文件UserMapper.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="com.cn.hnust.dao.UserDao">

    <resultMap type="com.cn.hnust.pojo.User" id="UserResult">
        <result property="id" column="id"/>
        <result property="user_name" column="user_ame"/>
        <result property="password" column="password"/>
    </resultMap>
    
    <select id="selectByPrimaryKey" parameterType="Integer" resultMap="UserResult">
        select * from user_t where id=#{userId}
    </select>
</mapper>

3.1.4.4建立Service接口IUserService

 IUserService.java

package com.cn.hnust.service;

import com.cn.hnust.pojo.User;

public interface IUserService {
 public User getUserById(int userId);
}

3.1.4.5建立IUserService接口的實現類UserServiceImpl

UserServiceImpl.java

package com.cn.hnust.service.impl;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.cn.hnust.dao.UserDao;
import com.cn.hnust.pojo.User;
import com.cn.hnust.service.IUserService;

@Service("userService")
public class UserServiceImpl implements IUserService {
    @Resource
    private UserDao userDao;

    public User getUserById(int userId) {
        // TODO Auto-generated method stub
        return this.userDao.selectByPrimaryKey(userId);
    }
    

}

 

3.1.4.6建立測試類

測試類在src/test/java中建立，如果使用了Spring那么就可以使用注解的方式來引入配置文件和類，然后將service接口對象注入，就可以進行測試了。

如果測試成功，表示Spring和Mybatis已經整合成功了。輸出信息使用的是Log4j打印到控制台。

TestMyBatis.java

package org.zsl.testmybatis;  
  
import javax.annotation.Resource;  
  
import org.apache.log4j.Logger;  
import org.junit.Before;  
import org.junit.Test;  
import org.junit.runner.RunWith;  
import org.springframework.context.ApplicationContext;  
import org.springframework.context.support.ClassPathXmlApplicationContext;  
import org.springframework.test.context.ContextConfiguration;  
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  
  
import com.alibaba.fastjson.JSON;  
import com.cn.hnust.pojo.User;  
import com.cn.hnust.service.IUserService;  
  
@RunWith(SpringJUnit4ClassRunner.class)     //表示繼承了SpringJUnit4ClassRunner類  
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})  
  
public class TestMyBatis {  
    private static Logger logger = Logger.getLogger(TestMyBatis.class);  
//  private ApplicationContext ac = null;  
    @Resource  
    private IUserService userService = null;  
  
//  @Before  
//  public void before() {  
//      ac = new ClassPathXmlApplicationContext("applicationContext.xml");  
//      userService = (IUserService) ac.getBean("userService");  
//  }  
  
    @Test  
    public void test1() {  
        User user = userService.getUserById(1);  
        // System.out.println(user.getUserName());  
        // logger.info("值："+user.getUserName());
//        System.out.println(user.getUser_name());
        logger.info(user.getId() + ".................." + user.getUser_name() + "........." + user.getPassword());  
    }  
}

Run As -> JUnit Test

運行結果:

至此，完成了Spring和Mybatis這兩大框架的整合，下面將繼續進行SpringMVC整合進項目中。

3.2整合Spring MVC

3.2.1配置spring-mvc.xml

配置里面的注釋很詳細，在此就補多少了，主要是自動掃描控制器，視圖模式，注解的啟動着三個。

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: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">  
    <!-- 自動掃描該包，使SpringMVC認為包下用了@controller注解的類是控制器 -->  
    <context:component-scan base-package="com.cn.hnust.controller" />  
    <!--避免IE執行AJAX時，返回JSON出現下載文件 -->  
    <bean id="mappingJacksonHttpMessageConverter"  
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">  
        <property name="supportedMediaTypes">  
            <list>  
                <value>text/html;charset=UTF-8</value>  
            </list>  
        </property>  
    </bean>  
    <!-- 啟動SpringMVC的注解功能，完成請求和注解POJO的映射 -->  
    <bean  
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
        <property name="messageConverters">  
            <list>  
                <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON轉換器 -->  
            </list>  
        </property>  
    </bean>  
    <!-- 定義跳轉的文件的前后綴 ，視圖模式配置-->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <!-- 這里的配置我的理解是自動給后面action的方法return的字符串加上前綴和后綴，變成一個 可用的url地址 -->  
        <property name="prefix" value="/WEB-INF/pages/" />  
        <property name="suffix" value=".jsp" />  
    </bean>  
      
    <!-- 配置文件上傳，如果沒有使用文件上傳可以不用配置，當然如果不配，那么配置文件中也不必引入上傳組件包 -->  
    <bean id="multipartResolver"    
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">    
        <!-- 默認編碼 -->  
        <property name="defaultEncoding" value="utf-8" />    
        <!-- 文件大小最大值 -->  
        <property name="maxUploadSize" value="10485760000" />    
        <!-- 內存中的最大值 -->  
        <property name="maxInMemorySize" value="40960" />    
    </bean>   
  
</beans>

3.2.2配置web.xml文件

這里面對spring-mybatis.xml的引入以及配置的spring-mvc的Servlet就是為了完成SSM整合，之前Spring和Mybatis整合不需要再此處進行任何配置。配置一樣有詳細的注釋。

web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns="http://java.sun.com/xml/ns/javaee"  
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"  
    version="3.0">  
    <display-name>Archetype Created Web Application</display-name>  
    <!-- Spring和mybatis的配置文件 -->  
    <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <param-value>classpath:spring-mybatis.xml</param-value>  
    </context-param>  
    <!-- 編碼過濾器 -->  
    <filter>  
        <filter-name>encodingFilter</filter-name>  
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
        <async-supported>true</async-supported>  
        <init-param>  
            <param-name>encoding</param-name>  
            <param-value>UTF-8</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>encodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
    <!-- Spring監聽器 -->  
    <listener>  
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
    </listener>  
    <!-- 防止Spring內存溢出監聽器 -->  
    <listener>  
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>  
    </listener>  
  
    <!-- Spring MVC servlet -->  
    <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>  
        <load-on-startup>1</load-on-startup>  
        <async-supported>true</async-supported>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>SpringMVC</servlet-name>  
        <!-- 此處可以可以配置成*.do，對應struts的后綴習慣 -->  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>  
    <welcome-file-list>  
        <welcome-file>/index.jsp</welcome-file>  
    </welcome-file-list>  
  
</web-app> 

3.3測試

至此已經完成了SSM三大框架的整合了，接下來測試一下。

3.3.1新建jsp頁面

success.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Success</title>
</head>
<body>
    <p>login success</p>
</body>
</html>

fail.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>fail</title>
</head>
<body>
    <p>login fail</p>
</body>
</html>

3.3.2建立UserController類

UserController.java 控制器

package com.cn.hnust.controller;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.cn.hnust.pojo.User;
import com.cn.hnust.service.IUserService;

@Controller  
@RequestMapping("/user")  
public class UserController {  
   @Resource  
   private IUserService userService;  
     
   @RequestMapping("/showUser")
   @ResponseBody
   public String toIndex(HttpServletRequest request,Model model){  
       int userId = Integer.parseInt(request.getParameter("id"));  
       User user = this.userService.getUserById(userId);  
       model.addAttribute("user", user);  
       System.out.println(user.getPassword());
       if ( user.getPassword().equals("12345") ) {
           return "success" + user.getPassword();
       } else {
           return "fail" + user.getPassword();
       }
//       return "success";  
   }  
} 

這個控制器寫的比較簡單，就是從瀏覽器訪問/user/showUser?id=1，然后去數據庫中取出id為1的用戶的信息，判斷該用戶的密碼和“12345”是否相同，如果相同則返回success字符串 + 該用戶的密碼，否則返回fail字符串 + 該用戶的密碼，由之前我們存到數據庫中的id=1的用戶的密碼來看，其顯然應該返回fail + 該用戶的密碼：

3.3.3部署項目

Run As -> Run On Server

在瀏覽器中輸入http://localhost:8080/Test/user/showUser?id=1，運行的結果為：

至此，SSM三大框架的整合就完成了，在此基礎上可以再太你家啊其他功能。

也可以對UserController進行修改：

package com.cn.hnust.controller;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.cn.hnust.pojo.User;
import com.cn.hnust.service.IUserService;

@Controller  
@RequestMapping("/user")  
public class UserController {  
   @Resource  
   private IUserService userService;  
     
   @RequestMapping("/showUser")
//   @ResponseBody
   public String toIndex(HttpServletRequest request,Model model){  
       int userId = Integer.parseInt(request.getParameter("id"));  
       User user = this.userService.getUserById(userId);  
       model.addAttribute("user", user);  
       System.out.println(user.getPassword());
       if ( user.getPassword().equals("12345") ) {
//           return "success" + user.getPassword();
           return "success";
       } else {
//           return "fail" + user.getPassword();
       }
//       return "success";  
       return "fail";
   }  
} 

驗證id=1的用戶的密碼是否是“12345”，如果是則返回success.jsp頁面，否則返回fail.jsp頁面，注意去掉了@ResponseBody的注解，返回的就是頁面

運行結果：