SSM实现最简单的登录验证

SSM实现最简单的登录验证

1.导入项目相关的jar包

以上就是该项目所需要的一些jar包（可能会有些jar没有用到，jar包是我自己在网上找的，放在/WEB-INF/bin文件夹里面，就不需要导包了！）

小编上传的jar包：http://download.csdn.net/detail/qq_25997041/9663603

2.建立项目结构

3.配置文件的配置

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/test1
jdbc.username=root
jdbc.password=
#定义初始连接数
jdbc.initialSize=0
#定义最大连接数
jdbc.maxActive=20
#定义最大空闲
jdbc.maxIdle=20
#定义最小空闲
jdbc.minIdle=1
#定义最长等待时间
jdbc.maxWait=60000

log4j.properties

#定义LOG输出级别
log4j.rootLogger=INFO,Console,File
#定义日志输出目的地为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以灵活地指定日志输出格式，下面一行是指定具体的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n
#文件大小到达指定尺寸的时候产生一个新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定输出目录
log4j.appender.File.File = logs/ssm.log
#定义文件最大大小
log4j.appender.File.MaxFileSize = 10MB
# 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志
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

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:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- 自动扫描 -->
<context:component-scan base-package="com.cn.ft" />
<!-- 引入配置文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:db.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}" />

4000
<property name="password" value="${jdbc.password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${jdbc.initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${jdbc.maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${jdbc.maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${jdbc.minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${jdbc.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" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/cn/ft/mapping/*.xml"></property>
</bean>

<!-- DAO接口所在包名，Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.cn.ft.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

<!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>

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:util="http://www.springframework.org/schema/util" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 -->
<context:component-scan base-package="com.cn.ft.controller" />

<!--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>

<!-- 启动SpringMVC的注解功能，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>

<!-- 定义跳转的文件的前后缀 ，视图模式配置 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>

<!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 -->
<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>

Account.java

package com.cn.ft.entity;

public class Account {
private Integer id;
private String user;
private String paw;
private Integer age;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public String getUser() {
return user;
}

public void setUser(String user) {
this.user = user;
}

public String getPaw() {
return paw;
}

public void setPaw(String paw) {
this.paw = paw;
}

public Integer getAge() {
return age;
}

public void setAge(Integer age) {
this.age = age;
}

}

AccountDao.java

package com.cn.ft.dao;

import com.cn.ft.entity.Account;

public interface AccountDao {
public Account getByName(String user);
}

accountMapping.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"
"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<mapper namespace="com.cn.ft.dao.AccountDao">
<select id="getById" parameterType="int" resultMap="accountMap">
select * from account where id = #{id}
</select>
<select id="getByName" parameterType="string" resultMap="accountMap">
select * from account where acc = #{name}
</select>
<resultMap id="accountMap" type="com.cn.ft.entity.Account">
<id property="id" column="id" />
<result property="user" column="acc" />
<result property="paw" column="password" />
<result property="age" column="age" />
</resultMap>

</mapper>

AccountController.java

package com.cn.ft.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 com.cn.ft.dao.AccountDao;
import com.cn.ft.entity.Account;

@Controller
@RequestMapping("/account")
public class AccountController {
@Resource
private AccountDao dao;

@RequestMapping("/showAccount")
public String toShowAccount(HttpServletRequest request, Model model) {
String user = request.getParameter("user");
String paw = request.getParameter("paw");
if (user == null || user == "") {
model.addAttribute("msg", "账号为空");
return "login";
}
Account account = dao.getByName(user);
if (!account.getPaw().equals(paw)) {
model.addAttribute("msg", "密码错误");
return "login";
}
model.addAttribute("acc", account);
return "showAccount";
}

@RequestMapping("/toLogin")
public String toLogin() {
return "login";
}
}

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>web</display-name>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
<!-- Spring配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>
<!-- 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>
<!-- 配置Spring监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 添加对SpringMVC的支持 -->
<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>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>

4.数据库

数据库字段以及数据信息：

6.测试

DaoTest.java

package com.cn.ft.test;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.alibaba.fastjson.JSON;
import com.cn.ft.dao.AccountDao;
import com.cn.ft.entity.Account;

public class DaoTest {
private Logger logger = Logger.getLogger(DaoTest.class);

@Test
public void ssfTest() {
ApplicationContext ac = new ClassPathXmlApplicationContext("spring-mybatis.xml");
AccountDao dao = ac.getBean(AccountDao.class);
Account acc = dao.getByName("haha");
logger.info(JSON.toJSONString(acc));
}
}

成功结果：



执行测试代码，看到数据库中的数据，表明已经成功

5.页面

login.jsp

<%@page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login</title>
</head>
<body>
<form action="showAccount.do" method="post">
<div>
账号：<input type="text" name="user" placeholder="请输入账号">
</div>
<div>
密码：<input type="password" name="paw" placeholder="请输入密码">
</div>
<div>
<span>${msg }</span>
</div>
<div>
<input type="submit" value="登录">
</div>
</form>
</body>
</html>

showAccount.jsp

<%@page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Account</title>
</head>
<body>
<h1>测试</h1>
<h2>ID：${acc.id }</h2>
<h3>USER：${acc.user }</h3>
<h4>PAW：${acc.paw }</h4>
<h5>AGE：${acc.age }</h5>
</body>
</html>

6.测试页面

将项目添加到服务器，小编用的是Tomcat

在浏览器中输入一下网址访问：

http://localhost:8080/项目名称/account/toLogin.do

效果图：



输入数据库中保存的账号和密码登录成功效果：



在过程中，小编遇到了两个BUG，都是因为缺少jar包引起的错误，若您也遇到相同的报错信息可以往这方面想，一下是小编的报错信息（仅供参考）：



注：缺少 commons-fileupload-1.3.2.jar



注：缺少 jackson-mapper-asl-1.9.13.jar 和 jackson-core-asl-1.9.13.jar

以上就是小编这次的SSM学习之旅！如果有大神看到有哪里不好的地方，希望您告诉小编改进改进！

注：以上的配置文件是小编收集整理起来的，并非全部原创，感谢分享的博主。