JAVA中使用MD5加密工具类实现对数据的加密处理

1.MD5工具类 

package com.ssm.util;

import java.security.MessageDigest;

public class MD5Util {
    //将字节数组转成十六进制字符串
    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }
    //对单个字节转换成整数进行取商取余数计算
    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        //根据下标d1，d2去数组hexDigits的数据
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
         // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                //将加密之后的字节数据转换成16进制的字符串
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
}

2.在登录注册中使用MD5加密算法

　　demo目录结构 

　　数据库用户表

CREATE TABLE `user` (
  `id` int(20) NOT NULL AUTO_INCREMENT COMMENT '编号',
  `userName` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '用户名',
  `password` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '密码',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

　　pojo对象User.java

package com.ssm.pojo;

public class User {
    private Integer id;
    private String userName;
    private String password;
    public Integer getId() {
        return id;
    }
    public void setId(Integer 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;
    }
    
    
    

}

2.1DAO层

　　DAO层：DAO层主要是做数据持久层的工作，负责与数据库进行联络的一些任务都封装在此， 

• DAO层的设计首先是设计DAO的接口，
• 然后在Spring的配置文件中定义此接口的实现类，
• 然后就可在模块中调用此接口来进行数据业务的处理，而不用关心此接口的具体实现类是哪个类，显得结构非常清晰，
• DAO层的数据源配置，以及有关数据库连接的参数都在Spring的配置文件中进行配置。

UserDaO.java

package com.ssm.dao;

import com.ssm.pojo.User;

public interface UserDao {
    //用户注册
    public int register(User user) ;
    //登陆
    public User login(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.ssm.dao.UserDao">
    <resultMap type="com.ssm.pojo.User" id="UserResult">
        <result property="id" column="id" />
        <result property="userName" column="userName" />
        <result property="password" column="password" />

    </resultMap>

    <select id="login" parameterType="com.ssm.pojo.User" resultMap="UserResult">
        select * from
        user where userName=#{userName} and password=#{password} limit 1
    </select>

    <insert id="register" parameterType="com.ssm.pojo.User">
        insert into user(userName,password)
        values(#{userName},#{password})
    </insert>
</mapper> 

2.2业务层：Service层

Service层：Service层主要负责业务模块的逻辑应用设计。 

• 首先设计接口，再设计其实现的类
• 接着再在Spring的配置文件中配置其实现的关联。这样我们就可以在应用中调用Service接口来进行业务处理。
• Service层的业务实现，具体要调用到已定义的DAO层的接口，
• 封装Service层的业务逻辑有利于通用的业务逻辑的独立性和重复利用性，程序显得非常简洁。

UserService.java

package com.ssm.service.impl;

import com.ssm.pojo.User;

public interface UserService {
    public User login(User user); 
     public int register(User user);

}

UserServiceImpl.java

package com.ssm.service.impl;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.ssm.dao.UserDao;
import com.ssm.pojo.User;
@Service("userService")
public class UserServiceImpl implements UserService {
    @Resource
    private UserDao userDao;

    public User login(User user) {
        // TODO Auto-generated method stub
        return userDao.login(user);
    }

    public int register(User user) {
        // TODO Auto-generated method stub
        return userDao.register(user);
    }
    

}

2.3控制层：Controller层

Controller层:Controller层负责具体的业务模块流程的控制， 

• 在此层里面要调用Service层的接口来控制业务流程，
• 控制的配置也同样是在Spring的配置文件里面进行，针对具体的业务流程，会有不同的控制器，我们具体的设计过程中可以将流程进行抽象归纳，设计出可以重复利用的子单元流程模块，这样不仅使程序结构变得清晰，也大大减少了代码量。

RegisterController.java

package com.ssm.controller;

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

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;


import com.ssm.pojo.User;
import com.ssm.service.impl.UserService;

import com.ssm.util.MD5Util;

@Controller
@RequestMapping("user")
public class RegisterController {
    @Resource
    private UserService userService;
    @RequestMapping("/register")
    public String register(User user, HttpServletRequest request){
        String username=request.getParameter("userName");
        String password=request.getParameter("password");
        String Md5password=MD5Util.MD5Encode(password, "UTF-8");
        System.err.println(Md5password);
        user.setPassword(Md5password);
        user.setUserName(username);
        int result=userService.register(user);
        if (result > 0) {
            return "index";
        } else {
            return"register";
        }
        
        
    }
    

}

LoginController.java

package com.ssm.controller;

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

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.ssm.pojo.User;
import com.ssm.service.impl.UserService;
import com.ssm.util.MD5Util;

@Controller
@RequestMapping("user")

public class LoginController {
    @Resource
    private UserService userService;
    @RequestMapping("/login")
    public String login(User user,HttpServletRequest request){
        String userName=request.getParameter("userName");
        String password=request.getParameter("password");
        //将登陆 提交的密码进行MD5加密然后到数据库加密密码进行对比验证
        String Md5password=MD5Util.MD5Encode(password, "UTF-8");
        user.setUserName(userName);
        user.setPassword(Md5password);
        User result=userService.login(user);
        if(result==null){
            request.setAttribute("errorMsg", "请认真核对账号、密码！");
            return "login";
        }else{
            return "success";
        }
        
        
    }

}

2.4view层（视图层）

• View层 此层与控制层结合比较紧密，需要二者结合起来协同工发。View层主要负责前台jsp页面的表示.

login.jsp

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" %>
<html>
<body>

<form action="${pageContext.request.contextPath}/user/login" method="post">
<p>用户名: <input type="text" name="username" style=" 300px" /></p>
<p>密&nbsp;&nbsp;码: <input type="password" name="password" style=" 300px" /></p>
<p><input type="submit" value="登陆" /></p>

</form>
<a href="jsp/register.jsp">注册</a>
</body>
</html>

register.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>注册</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/user/register" method="post">
<p>用户名: <input type="text" name="userName" style=" 300px" /></p>
<p>密&nbsp;&nbsp;码: <input type="password" name="password" style=" 300px" /></p>
<p><input type="submit" value="注册" /></p>

</form>

</body>
</html>

DAO层，Service层这两个层次都可以单独开发，互相的耦合度很低，完全可以独立进行，这样的一种模式在开发大项目的过程中尤其有优势Controller，View层因为耦合度比较高，因而要结合在一起开发，但是也可以看作一个整体独立于前两个层进行开发。这样，在层与层之前我们只需要知道接口的定义，调用接口即可完成所需要的逻辑单元应用，一切显得非常清晰简单。Service逻辑层设计Service层是建立在DAO层之上的，建立了DAO层后才可以建立Service层，而Service层又是在Controller层之下的，因而Service层应该既调用DAO层的接口，又要提供接口给Controller层的类来进行调用，它刚好处于一个中间层的位置。每个模型都有一个Service接口，每个接口分别封装各自的业务处理方法。

3.MD5工具类

MD5Util.java

package com.ssm.util;

import java.security.MessageDigest;

public class MD5Util {
    //将字节数组转成十六进制字符串
    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }
    //对单个字节转换成整数进行取商取余数计算
    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        //根据下标d1，d2去数组hexDigits的数据
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
         // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                //将加密之后的字节数据转换成16进制的字符串
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
}

4.ssm框架的配置文件

①数据库配置文件

jdbc.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssmtest?useUnicode=true&characterEncoding=UTF-8
username=root
password=123456
#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

②log4j配置文件

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/springmvcMybist/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

③spring-mybatis配置文件

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-4.0.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-4.0.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描 -->
    <context:component-scan base-package="com.ssm" />

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

④spring-mvc配置文件

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-4.0.xsd  
                            http://www.springframework.org/schema/context  
                            http://www.springframework.org/schema/context/spring-context-4.0.xsd  
                            http://www.springframework.org/schema/mvc  
                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!--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>

    <!-- 对静态资源的访问 -->
    <!-- <mvc:resources mapping="/js/**" location="/js/" /> <mvc:resources mapping="/css/**" 
        location="/css/" /> -->

    <!-- 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.ssm.controller" />

    <!-- 添加注解驱动 -->
    <mvc:annotation-driven enable-matrix-variables="true" />
    <!-- 允许对静态资源文件的访问 -->

    <mvc:default-servlet-handler />

    <!-- 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/jsp/" />
        <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>

⑤配置web.xml文件

<?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>
    
    <!-- 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监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 防止Spring内存溢出监听器 -->
    <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>
        <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <welcome-file-list>
        <welcome-file>/index.html</welcome-file>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

4.maven工程的pom.xml配置

<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.ssmdemo01</groupId>
  <artifactId>mavenproject</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>mavenproject Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <properties>  
        <!-- spring版本号 -->  
        <spring.version>4.0.2.RELEASE</spring.version>  
        <!-- mybatis版本号 -->  
        <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>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
      <dependency>  
            <groupId>javax</groupId>  
            <artifactId>javaee-api</artifactId>  
            <version>7.0</version>  
        </dependency>  
    
    
    
     <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>  
        <!-- 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>  
        <!-- 导入java ee jar 包 -->  
        <dependency>  
            <groupId>javax</groupId>  
            <artifactId>javaee-api</artifactId>  
            <version>7.0</version>  
        </dependency>  
        <!-- 导入Mysql数据库链接jar包 -->  
        <dependency>  
            <groupId>mysql</groupId>  
            <artifactId>mysql-connector-java</artifactId>  
            <version>5.1.30</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>1.2.2</version>  
        </dependency>  
        <!-- JSTL标签类 -->  
        <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>  
          
          
        <!-- 格式化对象，方便输出日志 -->  
        <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>  
        <!-- 上传组件包 -->  
        <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>mavenproject</finalName>
  </build>
  
</project>

5.运行项目