eclipse中SSM(maven)项目搭建全过程+实现用户登录功能

项目创建之前确保eclipse中已经配置好了jdk，tomcat，maven如果没有配置下面有配置教程的链接

　  eclipse中配置jdk的教程url:http://www.cnblogs.com/2016-10-07/p/7298495.html

　　　　配置tomcat的教程url:http://www.cnblogs.com/2016-10-07/p/7298515.html

　　　　配置maven的教程url:http://www.cnblogs.com/2016-10-07/p/7298650.html

一，创建maven项目

1，新建一个maven项目

2，点击Next后进入下个页面直接点击Next，进入到下面这个页面

3，我们选择最后单词为webapp的这个选项选中后点击Next，进入到下面的这个页面

此处的Group Id代表的是项目的包路径，

　　Artifact Id代表的是项目的名称

　　Version 代表版本号

　　Package代表生成的包名

点击完成我们的项目就算搭建好了，下面我们需要对项目做一些配置

4，配置项目的jdk，Tomcat,

　　右键单击项目名称选择Build path ==>Configure Build path进入到如下选项

　　我们将原有的jre Remove掉，然后  Add Library==>JRE System Library==>Next==>Alternate JRE==>Finish ==>Apply

jre配置完成，开始配置Tomcat，前面几步跟配置jdk是一样的，

Build path ==>Configure Build path==>Add Library==>Server Runtime

选择自己的Tomcat，点击下一步，然后Apply==>OK，

jdk与Tomcat就配置完成了，

5，下面我们还需要做如下的配置，

右击项目，选择Properties==>Maven==>Project  Facets

修改dynamic web module的url:http://www.cnblogs.com/2016-10-07/p/7297826.html

我们的maven项目到这就算建好了，下面开始搭建SSM框架，

 二，搭建SSM框架

　　1，在src/main/resources目录下创建SSM项目所需要的xml文件和properties文件

　　　　jdbc.properties(连接数据的配置文件)

driver=com.mysql.jdbc.Driver
#数据库的路径
url=jdbc:mysql://localhost:3306/maven
username=root
password=root
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000

 　　　　logj.properties(日志的配置文件)

#log的输出级别
log4j.rootLogger=WARN, Console, RollingFile

#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#RollingFile
log4j.appender.RollingFile=org.apache.log4j.DailyRollingFileAppender
#文件的输出目录
log4j.appender.RollingFile.File=/var/log/ssm_maven.log
log4j.appender.RollingFile.layout=org.apache.log4j.PatternLayout
log4j.appender.RollingFile.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#Hibernate level
#log4j.logger.org.hibernate=ERROR
log4j.logger.org.hibernate.cache.ehcache.AbstractEhcacheRegionFactory=ERROR
log4j.logger.org.hibernate.search.impl.ConfigContext=ERROR
log4j.logger.net.sf.ehcache.config.CacheConfiguration=ERROR

#Project defalult level
#log4j.logger.com.thinkgem.jeesite=DEBUG
log4j.logger.com.maven=DEBUG

　　　　spring-tx.xml(Spring的事务管理器配置文件)

<?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" 
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans      
                        http://www.springframework.org/schema/beans/spring-beans-3.1.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
                        http://www.springframework.org/schema/tx 
           			    http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
	<!--事务管理 -->
	<!--注意事务管理是spring的而不是springMVC的不要弄混了导致事务不回滚 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>
	<!-- 开启注解方式声明事务 -->
	<tx:annotation-driven transaction-manager="transactionManager" />
</beans>   

 　　　　spring-dao.xml(指定包下的所有dao文件都会注入到Spring中)

<?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 class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!--basePackage指定要扫描的包，在此包之下的Dao接口文件都会被Spring搜索到，可以指定多个包，包与包之间用逗号或分号分隔 -->
		<property name="basePackage" value="com.ssm.dao" />
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />

	</bean>

</beans>

 　　　　spring-db.xml(此文件用于获取jdbc.properties连接数据库的配置文件连接数据库，以及spring与mybatis的完美整合)

<?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="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="${driver}" />
		<!--数据库连接的url -->
		<property name="url" value="${url}" />
		<!--用户名 -->
		<property name="username" value="${username}" />
		<!--密码 -->
		<property name="password" value="${password}" />
		<!--初始化连接大小 -->
		<property name="initialSize" value="${initialSize}" />
		<!--连接池最大数量 -->
		<property name="maxActive" value="${maxActive}" />
		<!--连接池最大空闲 -->
		<property name="maxIdle" value="${maxIdle}" />
		<!--连接池最小空闲 -->
		<property name="minIdle" value="${minIdle}" />
		<!--获取连接最长等待时间 -->
		<property name="maxWait" value="${maxWait}" />
	</bean>

	<!--spring与mybatis完美整合，不需要mybatis配置映射文件 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<!-- 自动扫描mapping.xml文件，classpath后需要输入自己的mapper文件的路径 -->
		<property name="mapperLocations" value="classpath:com/ssm/mapper/*.xml"></property>
	</bean>
</beans>                       

 　　spring-mvc.xml(用于配置SpringMVC)

<?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">


	<!--添加注解驱动 -->
	<mvc:annotation-driven />
	<mvc:default-servlet-handler />
	<!--设置使用注解的类所在的包 -->
	<context:component-scan base-package="com.ssm.controller" />
	<!--完成请求和注解POJO的映射 -->
	<bean
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="messageConverters">
			<list>
				<ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->
			</list>
		</property>
	</bean>
	<!--定义跳转文件的前后缀，试图模式配置 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
	<!--避免IE执行AJAX时，返回JSON出现下载文件 -->
	<bean id="mappingJacksonHttpMessageConverter"
		class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
		<property name="supportedMediaTypes">
			<list>
				<value>text/html;charset=UTF-8</value>
			</list>
		</property>
	</bean>
	<!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 -->
	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<!-- 默认编码 -->
		<property name="defaultEncoding" value="utf-8" />
		<!-- 文件大小最大值 -->
		<property name="maxUploadSize" value="10485760000" />
		<!-- 内存中的最大值 -->
		<property name="maxInMemorySize" value="40960" />
	</bean>
</beans>                       

　　applicationContext.xml(将其他几个配置文件整合到这个Spring配置文件中)

<?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">

	<!--使用注解方式注入 -->
	<context:annotation-config />
	<!--自动扫描包  base-package为你的代码的路径-->
	<context:component-scan base-package="com.ssm" />
	<!--导入dao配置 -->
	<import resource="spring-dao.xml" />
	<!--导入数据库配置 -->
	<import resource="spring-db.xml" />
	<!--导入事务管理器配置 -->
	<import resource="spring-tx.xml" />
</beans>

 　　2，项目的pom.xml文件如下（所需的jar已经全部导入）

<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>com.maven</groupId>
	<artifactId>ssm_maven</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>ssm_maven Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<!-- 用来设置版本号 -->
	<properties>
		<srping.version>4.0.2.RELEASE</srping.version>
		<mybatis.version>3.2.8</mybatis.version>
		<slf4j.version>1.7.12</slf4j.version>
		<log4j.version>1.2.17</log4j.version>
	</properties>
	<!-- 用到的jar包 -->
	<dependencies>
		<!-- 单元测试 -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.11</version>
			<!-- 表示开发的时候引入，发布的时候不会加载此包 -->
			<scope>test</scope>
		</dependency>
		<!-- java ee包 -->
		<dependency>
			<groupId>javax</groupId>
			<artifactId>javaee-api</artifactId>
			<version>7.0</version>
		</dependency>
		<!-- spring框架包 start -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-oxm</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${srping.version}</version>
		</dependency>
		<!-- spring框架包 end -->
		<!-- mybatis框架包 start -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>${mybatis.version}</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.2.2</version>
		</dependency>
		<!-- mybatis框架包 end -->
		<!-- 数据库驱动 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.35</version>
		</dependency>
		<!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
		<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>1.4</version>
		</dependency>
		<!-- jstl标签类 -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<!-- log start -->
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>${log4j.version}</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 -->
		<!-- Json -->
		<!-- 格式化对象，方便输出日志 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.6</version>
		</dependency>
		<dependency>
			<groupId>org.codehaus.jackson</groupId>
			<artifactId>jackson-mapper-asl</artifactId>
			<version>1.9.13</version>
		</dependency>
		<!-- 上传组件包 start -->
		<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>1.10</version>
		</dependency>
		<!-- 上传组件包 end -->
	</dependencies>
	<build>
		<finalName>ssm_maven</finalName>
	</build>
</project>

 　　3，web.xml文件的配置如下

<?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>
	<welcome-file-list>
		<welcome-file>/WEB-INF/jsp/login.jsp</welcome-file>
	</welcome-file-list>

	<!-- 加载spring bean -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- 编码过滤器 -->
	<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 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>
		<url-pattern>/</url-pattern>
	</servlet-mapping>

</web-app> 

至此，我们的项目的配置就结束了

三，开始敲代码

　　1，我们的代码是放在src/main/java这个目录下的，在这个目录下新建如下的包

　　　　

　　　　创建好这几个包

　　2，在controller这层中创建userController.java

package com.ssm.controller;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.ssm.entity.User;
import com.ssm.service.IUserService;

/**
 * 
 * @author liyongqiang
 *
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

    /**
     * 用户登录
     * 
     * @param req
     * @param mv
     * @return
     */
    @RequestMapping("/login")
    public ModelAndView login(HttpServletRequest req, ModelAndView mv) {

        Map<String, String> map = new HashMap<String, String>();
        map.put("username", req.getParameter("username"));
        map.put("password", req.getParameter("password"));
        User user = userService.login(map);
        if (user != null) {//登录成功进入首页
            mv.setViewName("index");
        } else {//登录失败回到登录页面
            mv.addObject("message", "用户名或密码输入错误,请重新输入");
            mv.setViewName("login");
        }
        return mv;

    }


}

 　　3，dao层IUserDao.java

package com.ssm.dao;

import java.util.Map;

import com.ssm.entity.User;

public interface IUserDao {


	/**
	 * 登录
	 * 
	 * @param map
	 * @return
	 */
	public User login(Map<String, String> map);

}

 　　4，entity层User.java

package com.ssm.entity;

import java.io.Serializable;
import java.math.BigDecimal;

public class User implements Serializable {

	private static final long serialVersionUID = 1L;
	private int id;
	private String username;
	private String password;
	private String email;
	private String createTime;
	private String lastLoginTime;
	private int status;
	private BigDecimal account;
	
	public BigDecimal getAccount() {
		return account;
	}

	public void setAccount(BigDecimal account) {
		this.account = account;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getCreateTime() {
		return createTime;
	}

	public void setCreateTime(String createTime) {
		this.createTime = createTime;
	}

	public String getLastLoginTime() {
		return lastLoginTime;
	}

	public void setLastLoginTime(String lastLoginTime) {
		this.lastLoginTime = lastLoginTime;
	}

	public int getStatus() {
		return status;
	}

	public void setStatus(int status) {
		this.status = status;
	}

	public static long getSerialversionuid() {
		return serialVersionUID;
	}

	public int getId() {
		return id;
	}

	public void setId(int 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;
	}

}

 　　5，service层IUserService.java

package com.ssm.service;

import java.util.Map;

import com.ssm.entity.User;

public interface IUserService {


	/**
	 * 登录
	 * 
	 * @param map
	 * @return
	 */
	public User login(Map<String, String> map);

}

 　　6，service下的impl中UserServiceImpl.java

package com.ssm.service.impl;

import java.util.Map;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.ssm.dao.IUserDao;
import com.ssm.entity.User;
import com.ssm.service.IUserService;

@Service("UserService")
public class UserServiceImpl implements IUserService {

	@Resource
	private IUserDao userDao;

	public User login(Map<String, String> map) {
		// TODO Auto-generated method stub
		return userDao.login(map);
	}

}

 　　7，mapper下的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.ssm.dao.IUserDao">
	<resultMap id="BaseResultMap" type="com.ssm.entity.User">
		<result column="id" property="id" jdbcType="INTEGER" />
		<result column="username" property="username" jdbcType="VARCHAR" />
		<result column="password" property="password" jdbcType="VARCHAR" />

	</resultMap>


	<!--用户登录 -->
	<select id="login" parameterType="java.util.Map" resultType="com.ssm.entity.User">
		SELECT
		*
		FROM
		u_user
		WHERE
		username=#{username,jdbcType=VARCHAR}
		AND
		password=#{password,jdbcType=VARCHAR}
	</select>

</mapper>  

 　　项目所需的sql文件：

　　

-- ----------------------------
-- Table structure for u_user
-- ----------------------------
DROP TABLE IF EXISTS `u_user`;
CREATE TABLE `u_user` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `username` varchar(20) DEFAULT NULL COMMENT '用户昵称',
  `email` varchar(128) DEFAULT NULL COMMENT '邮箱|登录帐号',
  `password` varchar(32) DEFAULT NULL COMMENT '密码',
  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
  `last_login_time` datetime DEFAULT NULL COMMENT '最后登录时间',
  `status` bigint(1) DEFAULT '1' COMMENT '1:有效，0:禁止登录',
  `account` decimal(15,2) DEFAULT NULL COMMENT '账户',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=17 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of u_user
-- ----------------------------
INSERT INTO `u_user` VALUES ('14', 'admin', null, '123456', null, null, '1', '1500.00');
INSERT INTO `u_user` VALUES ('16', 'zhangsan', null, '123456', null, null, '1', '3500.00');

　　前端的页面代码在我上传的项目源码中，直接复制过去用就行了，我就不在这写了

　　项目源码百度云盘链接: https://pan.baidu.com/s/1i4397Hr 密码: ptma

　　下面我们看下登录页面的效果，项目的访问路径：http://localhost:80/ssm_maven

 点击登录后

好了，到这项目就算完成了。