SSM框架整合&&实现用户登录

今天药忘吃喽~ 2022-05-17 09:11 264阅读 0赞

*  SSM
    
     *  1 开发环境准备
     *  2 开始整合
        
         *  2.1 创建项目
            
             *  2.1.1 创建Maven Project
             *  2.1.2 导入jar包
                
                 *  Tomcat库支持
                 *  pom.xml文件
         *  2.2 配置文件
            
             *  2.2.1 web.xml
             *  2.2.2 applicationContext.xml
             *  2.2.3 db.properties
             *  2.2.4 springmvc-servlet.xml
             *  2.2.5 SqlMapConfig.xml
     *  3 Demo（用户登录）
        
         *  3.1 创建user表
         *  3.2 前端页面
            
             *  3.2.1 login.jsp
             *  3.2.2 fail.jsp
             *  3.2.3 index.jsp
         *  3.3 后台代码
            
             *  3.3.1 domain层
                
                 *  User.java
             *  3.3.2 Dao（mapper）层
                
                 *  UserMaperr.java
                 *  UserMapper.xml
             *  3.3.3 service层
                
                 *  IUserService.java
                 *  UserService.java
             *  3.3.4 controller层
                
                 *  UserController.java
         *  3.4 运行程序
     *  4 项目下载地址

# SSM #

## 1 开发环境准备 ##

IDE使用的是eclipse（虽然IDEA更好用，但eclipse可能在工作中更通用，还是得用熟才行），搭建SSM项目之前，需要配置好如下环境：

*  JDK
 *  Tomcat
 *  Maven  
    
    
     *  帮助我们管理项目所需的jar包（ssm框架所需的jar包有20~30个）

以及eclipse的插件：

*  Spring Tools

## 2 开始整合 ##

### 2.1 创建项目 ###

#### 2.1.1 创建Maven Project ####

当你配置好Maven环境后，就可以在eclipse中直接创建Maven项目。

File->New->Other->【Maven Project】->不勾选Create a simple project

![70][]

(图2.1.1 创建Maven Project)

点击Next->选择webapp

![70 1][]

输入Group Id（组织名）与Artifact Id（项目名），然后它就会帮我们自动生成好一个包名。

![70 2][]

点击Finish，这样就创建好了一个Maven工程，以下是目录结构。

![70 3][]

可以看到项目现在是报错了，那是因为还没有引入所需要的jar包，接下来是要导入项目所需要的包。

#### 2.1.2 导入jar包 ####

##### Tomcat库支持 #####

创建好项目后，先加入Tomact库，项目->右键菜单->BuildPath->Configure Build Path->Libraries->Add Library->选中Server Runtime->Next->选中你的Tomcat版本->Finish。

##### pom.xml文件 #####

打开项目下的pom.xml文件（所有jar包依赖都写在这个文件中，进行统一管理），并将以下内容复制粘贴到\\标签之后即可，使用Ctrl+S保存xml文件。

导入的依赖如下所示：

<properties>
        
        <spring.version>4.3.5.RELEASE</spring.version>
        
        <mybatis.version>3.2.7</mybatis.version>
        
        <slf4j.version>1.7.7</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
        
        <junit.version>4.9</junit.version>
        </properties>
    
        <dependencies>
            
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-validator</artifactId>
                <version>5.4.0.Final</version>
            </dependency>
    
            
            <dependency>
                <groupId>javax.validation</groupId>
                <artifactId>validation-api</artifactId>
                <version>2.0.1.Final</version>
            </dependency>
    
            
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                
                <scope>test</scope>
            </dependency>
    
            
            <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>aopalliance</groupId>
                <artifactId>aopalliance</artifactId>
                <version>1.0</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.ow2.asm</groupId>
                <artifactId>asm</artifactId>
                <version>4.2</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.8.13</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>cglib</groupId>
                <artifactId>cglib</artifactId>
                <version>2.2.2</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>3.7</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>dom4j</groupId>
                <artifactId>dom4j</artifactId>
                <version>1.6.1</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.9.6</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>2.9.6</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>javax.servlet.jsp.jstl</groupId>
                <artifactId>jstl-api</artifactId>
                <version>1.2</version>
                <exclusions>
                    <exclusion>
                        <groupId>javax.servlet</groupId>
                        <artifactId>servlet-api</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>javax.servlet.jsp</groupId>
                        <artifactId>jsp-api</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.glassfish.web</groupId>
                <artifactId>jstl-impl</artifactId>
                <version>1.2</version>
                <exclusions>
                    <exclusion>
                        <groupId>javax.servlet</groupId>
                        <artifactId>servlet-api</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>javax.servlet.jsp</groupId>
                        <artifactId>jsp-api</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>javax.servlet.jsp.jstl</groupId>
                        <artifactId>jstl-api</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            
            
            <dependency>
                <groupId>org.apache.taglibs</groupId>
                <artifactId>taglibs-standard-impl</artifactId>
                <version>1.2.5</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>
    
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>1.2.2</version>
            </dependency>
    
    
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.36</version>
            </dependency>
    
            
    
    
            
            <dependency>
                <groupId>commons-dbcp</groupId>
                <artifactId>commons-dbcp</artifactId>
                <version>1.2.2</version>
            </dependency>
    
            
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
    
            
            
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
    
    
            
            <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>
    
            
            <dependency>
                <groupId>org.codehaus.jackson</groupId>
                <artifactId>jackson-mapper-asl</artifactId>
                <version>1.9.13</version>
            </dependency>
    
            
            
            <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>
            
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.1</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                        <encoding>UTF-8</encoding>
                    </configuration>
                </plugin>
            </plugins>
          </build>

（注意\\标签下的JRE版本与你的Java环境是否一致，不一致需要进行修改）

写入了pom.xml文件后，我们还需要更新Maven项目，选中项目->右键菜单->Maven->Update Project->选择ok，此时eclips开始自动下载pom.xml中所指定的jar包。

### 2.2 配置文件 ###

如果你是第一次整合ssm，我强烈建议你就按照以下的文件命名方式。

ssm框架的需要配置的文件如下：

*  web.xml  
    
    
     *  配置spring
     *  配置spring mvc
     *  设置字符过滤器
 *  db.properties  
    
    
     *  设置数据库连接属性
 *  applicationContext  
    
    
     *  配置DataSource
     *  配置sqlSessionFactory工厂
     *  配置mapper接口
     *  配置事务
     *  设置注解扫描器
 *  springmvc-servlet  
    
    
     *  设置注解扫描器
     *  mvc注解驱动
     *  视图解析器
     *  文件上传解析器
 *  SqlMapConfig：  
    
    
     *  配置typeAliases

创建好如下的文件目录结构（包名、文件名可以自己进行修改），文件目录如下：

![70 4][]

创建好文件目录之后，我们就可以开始写配置文件了，注意按照自己的目录结构修改每个xml文件中的包名。

#### 2.2.1 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>
    
      
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
      </context-param>
    
    
      
      <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:springmvc-servlet.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>
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
    
      
      <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>
        <init-param>
          <param-name>forceEncoding</param-name>
          <param-value>true</param-value>
        </init-param>
      </filter>
      <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    </web-app>

#### 2.2.2 applicationContext.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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c" xmlns:cache="http://www.springframework.org/schema/cache" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" xmlns:oxm="http://www.springframework.org/schema/oxm" xmlns:p="http://www.springframework.org/schema/p" xmlns:task="http://www.springframework.org/schema/task" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.3.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.3.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd">
    
        
        <context:property-placeholder location="classpath:db.properties"/>
    
        
        <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <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>
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"></property>
              
            <property name="mapperLocations" value="classpath:/com/rhine/studySSM/mapper/*.xml"></property>
            <property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
        </bean>
    
          
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
            <property name="basePackage" value="com.rhine.studySSM.mapper" />  
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>  
        </bean>  
    
        
        
        <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        <tx:advice id="txAdvice" transaction-manager="txManager">
            <tx:attributes>
                <tx:method name="save" propagation="REQUIRED"/>
                <tx:method name="get" read-only="true"/>
                <tx:method name="*" propagation="REQUIRED"/>
            </tx:attributes>
        </tx:advice>
        <aop:config>
            <aop:pointcut expression="execution(* com.rhine.studySSM.service.impl.*.*(..))" id="pointcut"/>
            <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
        </aop:config>
    
        
        <context:component-scan base-package="com.rhine.studySSM.service"/>
    </beans>

#### 2.2.3 db.properties ####

jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql:///testconn
    jdbc.username=root
    jdbc.password=abc123456

**最好加上jdbc前缀**，以防止命名冲突，使得spring创建DataSource的bean失败。

#### 2.2.4 springmvc-servlet.xml ####

#### 2.2.5 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>
        <typeAliases>
            <package name="com.rhine.studySSM.domain"/>
        </typeAliases>
    </configuration>

## 3 Demo（用户登录） ##

以上，我们就完成了SSM（spring+spring mvc+mybatis）的整合，接下来，就以一个用户登录的例子，完成一次前端与后台的请求和响应。

**为了之后查阅每一层中的代码格式方便，所以特意在文章中贴上了几乎所有的代码。如果你不想在文章中查看具体的代码细节，可直接在文末查看代码的下载地址。**

### 3.1 创建user表 ###

<table> 
 <thead> 
  <tr> 
   <th>字段名</th> 
   <th>类型</th> 
   <th>主键</th> 
   <th>Not NULL</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>id</td> 
   <td>int</td> 
   <td>√</td> 
   <td>√</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>varchar</td> 
   <td></td> 
   <td>√</td> 
  </tr> 
  <tr> 
   <td>password</td> 
   <td>varchar</td> 
   <td></td> 
   <td>√</td> 
  </tr> 
 </tbody> 
</table>

sql脚本如下：

-- ----------------------------
    -- Table structure for user
    -- ----------------------------
    DROP TABLE IF EXISTS `user`;
    CREATE TABLE `user` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(255) NOT NULL, `password` varchar(255) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
    
    -- ----------------------------
    -- Records of user
    -- ----------------------------
    INSERT INTO `user` VALUES ('1', 'rhine', 'abc123');
    INSERT INTO `user` VALUES ('2', 'cyy', 'abc123');

### 3.2 前端页面 ###

所有的前端页面都防止在webapp文件夹中。

*  login.jsp（登录页面）  
    
    
     *  登录成功则跳转到homepage/index.jsp页面中，并显示用户名
     *  登录失败则跳转到fail.jsp页面
 *  fail.jsp（登录失败页面）
 *  index.jsp（首页）

文件目录结构如下所示：

![70 5][]

#### 3.2.1 login.jsp ####

<%@ 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">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>登录</title>
    </head>
    <body>
        <h1>用户登录</h1>
        <hr/>
        <form action="${pageContext.request.contextPath }/user/login" method="POST">
            用户名:<input type="text" name="name"><br>
            密 码:<input type="password" name="password"><br>
            <input type="submit" value="登录">
        </form>
    </body>
    </html>

注意\\标签中的name属性必须与User类中的字段名一一对应。

#### 3.2.2 fail.jsp ####

#### 3.2.3 index.jsp ####

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
    <!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>Index</title>
    </head>
    <body>
        <h1>你好<c:out value="${sessionScope.user.name }"/>, 早上好！</h1>
    </body>
    </html>

通过session获取到用户名，并使用jstl标签打印在页面上。

### 3.3 后台代码 ###

你如果学习过ssm框架，那你对后台代码的结构应该完全不陌生。

![70 6][]

#### 3.3.1 domain层 ####

##### User.java #####

package com.rhine.studySSM.domain;
    
    import java.io.Serializable;
    
    @SuppressWarnings("serial")
    public class User implements Serializable{ 
    
        private Integer id;
        private String name;
        private String password;
    
        public Integer getId() {
            return id;
        }
        public void setId(Integer id) {
            this.id = id;
        }
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public String getPassword() {
            return password;
        }
        public void setPassword(String password) {
            this.password = password;
        }
    }

与数据库中的字段名一一对应，如果不同，则需要设置别名。

#### 3.3.2 Dao（mapper）层 ####

##### UserMaperr.java #####

package com.rhine.studySSM.mapper;
    
    import org.springframework.stereotype.Repository;
    import com.rhine.studySSM.domain.User;
    
    @Repository
    public interface UserMapper { 
    
        User userlogin(User user);
    }

##### 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.rhine.studySSM.mapper.UserMapper">
      <resultMap id="BaseResultMap" type="com.rhine.studySSM.domain.User">
        <id column="id" jdbcType="INTEGER" property="id"/>
        <result column="name" jdbcType="VARCHAR" property="name"/>
        <result column="passsword" jdbcType="VARCHAR" property="password"/>     
      </resultMap>
      <select id="userlogin" parameterType="com.rhine.studySSM.domain.User" resultType="com.rhine.studySSM.domain.User">
        SELECT * FROM user WHERE name=#{name} AND password=#{password}
      </select>
    </mapper>

#### 3.3.3 service层 ####

##### IUserService.java #####

package com.rhine.studySSM.service;
    
    import com.rhine.studySSM.domain.User;
    
    public interface IUserService { 
        User userlogin(User user);
    }

##### UserService.java #####

package com.rhine.studySSM.service.impl;
    
    import java.util.List;
    
    import javax.annotation.Resource;
    
    import org.springframework.stereotype.Service;
    
    import com.rhine.studySSM.domain.User;
    import com.rhine.studySSM.mapper.UserMapper;
    import com.rhine.studySSM.service.IUserService;
    
    
    @Service
    public class UserService implements IUserService{ 
    
        @Resource
        UserMapper userMapper;
    
        @Override
        public User userlogin(User user) {
            return userMapper.userlogin(user);
        }
    }

#### 3.3.4 controller层 ####

##### UserController.java #####

package com.rhine.studySSM.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.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import com.rhine.studySSM.domain.User;
    import com.rhine.studySSM.service.IUserService;
    
    
    @Controller
    @RequestMapping("/user")
    public class UserController { 
    
        @Autowired
        IUserService userService;
    
        @RequestMapping("/login")
        public String login(User user, Model model, HttpServletRequest req) {
            HttpSession session = req.getSession();
            if(user != null) {
                User loginUser = userService.userlogin(user);
                if(loginUser != null) {
                    System.out.println("登录成功");
                    session.setAttribute("user", loginUser);
                    return "homepage/index";
                }else {
                    System.out.println("登录失败");
                    return "fail";
                } 
            }
            return "fail";
        }
    }

### 3.4 运行程序 ###

在tomcat中运行程序，并根据数据库user表中的已有数据，进行登录，效果如下：

![70 7][]

（早上开始写的，写完都中午了，还早上好…哈哈。写博客还是挺花时间的，不过后面回顾起来更省时间！）

## 4 项目下载地址 ##

SSM就已经整合完成了，现在有了这个模板，就不需要每次都去重复的配置项目了，省去了很多事情。

gitee地址：[https://gitee.com/Rhine/StudySSM][https_gitee.com_Rhine_StudySSM]

[70]: /images/20220517/4c71604f23a640379c5038a903726b5a.png
[70 1]: /images/20220517/77f1cf936ba1406ba3d3dd8c53612d4d.png
[70 2]: /images/20220517/b308be2cb5ba4f64b4fbf2becd536895.png
[70 3]: /images/20220517/b606307b7b464dc5a329310ab6c27e6c.png
[70 4]: /images/20220517/dc93358eeeab4f6a9f64ca2d0a7965b0.png
[70 5]: /images/20220517/dc104877f41a4805a93d0cd5a6e0ab12.png
[70 6]: /images/20220517/ba2618af50ab4677968bd2875f870544.png
[70 7]: /images/20220517/8da58c7330da42fb9c289d22104960b0.png
[https_gitee.com_Rhine_StudySSM]: https://gitee.com/Rhine/StudySSM