Spring MVC 学习

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引用至：http://fangyong2006.iteye.com/blog/117563

用Spring MVC实现用户登录的完整实例本例子是再Eclipse中建立一个Tomcat工程,来讲解Spring MVC 的全过程,实例代码如下:

<一>编写日记文件放在myMVC/WEB-INF/src下


#指定日志输入文件的大小 

log4j.appender.stdout.MaxFileSize=500KB 

log4j.appender.stdout.MaxBackupIndex=50 

log4j.appender.stdout.Append=true 

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout 

log4j.appender.stdout.layout.ConversionPattern=[%-5p]%d{yyyy-MM-ddHH:mm:ss}%c-%m%n 

#定义log4j的显示方式 

log4j.appender.A1=org.apache.log4j.RollingFileAppender 

#指定日志输入文件的名称 

log4j.appender.A1.File=org.log 

#指定日志输入文件的大小 

log4j.appender.A1.MaxFileSize=500KB 

log4j.appender.A1.MaxBackupIndex=50 

log4j.appender.A1.Append=true 

log4j.appender.A1.layout=org.apache.log4j.PatternLayout 

log4j.appender.A1.layout.ConversionPattern=%d{ISO8601}-[%P][%C{1}]-%m%n 

#定义log4j的显示方式 

log4j.appender.A1=org.apache.log4j.RollingFileAppender 

#指定日志输入文件的名称 

log4j.appender.A1.File=gc.log 

#指定日志输入文件的大小 

log4j.appender.gc.MaxFileSize=500KB 

log4j.appender.gc.MaxBackupIndex=50 

log4j.appender.gc.Append=true 

log4j.appender.gc.layout=org.apache.log4j.PatternLayout 

log4j.appender.gc.layout.ConversionPattern=%d{ISO8601}-[%P][%C{1}]-%m%n

<二>配置web.xml

<?xml version="1.0" encoding="UTF-8"?> 

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

version="2.4" 

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 

  <servlet> 

     <servlet-name>dispatcherServlet</servlet-name> 

     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 

     <!-- 初始化参数 --> 

     <init-param> 

        <param-name>contextConfigLocation</param-name> 

        <param-value>/WEB-INF/dispatcherServlet-servlet.xml</param-value> 

     </init-param> 

  </servlet> 

  <servlet-mapping> 

     <servlet-name>dispatcherServlet</servlet-name> 

     <url-pattern>*.do</url-pattern> 

  </servlet-mapping> 

  <taglib> 

     <taglib-uri>/spring</taglib-uri> 

     <taglib-location>/WEB-INF/spring.tld</taglib-location> 

  </taglib> 

  <welcome-file-list> 

    <welcome-file>index.jsp</welcome-file> 

  </welcome-file-list> 

</web-app>

<三>编写登录页面myMVC/gc/jsp目录下login.jsp


<%@taglib prefix="spring" uri="/spring"%> 

<%@ page contentType="text/html;charset=GBK"%> 

<html> 

<head><title><spring:message code="title"/></title></head> 

<body> 

   <form action="/myMVC/login.do" name="User" method="post"> 

      <spring:bind path="command.username"> 

         <spring:message code="username"></spring:message> 

         <input type="text" name="${status.expression }"value="${status.value }"/> 

         <br> 

         <font color="red"><b>${status.errorMessage }</b></font><br> 

      </spring:bind> 

      <spring:bind path="command.password"> 

         <spring:message code="password"></spring:message> 

         <input type="password" name="${status.expression }"value="${status.value }"/> 

         <br> 

         <font color="red"><b>${status.errorMessage }</b></font><br> 

      </spring:bind> 

      <spring:bind path="command.password2"> 

         <spring:message code="password2"></spring:message> 

         <input type="password" name="${status.expression }"value="${status.value }"/> 

         <br> 

         <font color="red"><b>${status.errorMessage }</b></font><br>         

      </spring:bind> 

      <input type="submit" value="<spring:messagecode='submit'/>"/> 

   </form> 

</body> 

</html>

<四>编写显示成功的页面myMVC/gc/jsp目录下success.jsp

<%@taglib prefix="spring" uri="/spring"%> 

<%@page contentType="text/html;charset=GBK"%> 

<html> 

<head><title><spring:message code="title"></spring:message></title></head> 

<body> 

   <spring:bind path="command.username"> 

      <h3><spring:message code="welcome"></spring:message>{status.value }<spring:message code="loginSuccess"/></h3><br> 

   </spring:bind> 

</body> 

</html>

<五>编写存放用户登录信息的Bean,在com.gc.action包中建立Java文件User.java

package com.gc.action; 

publicclass User { 

    private String username=null; 

    private String password=null; 

    private String password2=null; 

    public String getPassword() { 

       returnpassword; 

    } 

    publicvoid setPassword(String password) { 

       this.password = password; 

    } 

    public String getPassword2() { 

       returnpassword2; 

    } 

    publicvoid setPassword2(String password2) { 

       this.password2 = password2; 

    } 

    public String getUsername() { 

       returnusername; 

    } 

    publicvoid setUsername(String username) { 

       this.username = username; 

    } 

}

<六>在com.gc.action包下编写用户验证类UserValidator.java

package com.gc.action; 

import com.gc.action.User; 

import org.springframework.validation.Validator; 

import org.springframework.validation.Errors; 

publicclass UserValidator implements Validator { 

    publicboolean supports(Class clazz){ 

       return clazz.equals(User.class); 

    } 

    publicvoid validate(Object obj,Errors errors){ 

       User user=(User)obj; 

       if(!"tang".equals(user.getUsername())){ 

           errors.rejectValue("username", "usernameerror", null, "用户名不正确"); 

       } 

       if(!"123456".equals(user.getPassword())){ 

           errors.rejectValue("password", "passworderror", null, "密码不正确"); 

       } 

       if(!user.getPassword().equals(user.getPassword2())){ 

           errors.rejectValue("password2", "password2error", null, "2次输入密码不一致"); 

       } 

    } 

}

<七>在com.gc.action包下编写用户登录逻辑Login.java

package com.gc.action; 

import java.util.Map; 

import org.apache.log4j.Logger; 

import org.springframework.validation.BindException; 

import org.springframework.web.servlet.ModelAndView; 

import org.springframework.web.servlet.mvc.SimpleFormController; 

publicclass Login extends SimpleFormController{ 

    private Logger logger=Logger.getLogger(this.getClass().getName()); 

    public ModelAndView onSubmit(Object command,BindException errors)throws Exception{ 

       User user=(User)command; 

       Map modle=errors.getModel(); 

       modle.put("user", user); 

       returnnew ModelAndView(getSuccessView(),modle); 

    } 

}

<八>myMVC/WEB-INF目录下编写配置文件dispatcherServlet-servlet.xml

<?xml version="1.0" encoding="UTF-8"?> 

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" 

"http:www.springframework.org/dtd/spring-bean.dtd"> 

<beans> 

   <!-- 定义国际化消息 --> 

   <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> 

      <property name="basename"> 

         <value>messages</value> 

      </property> 

   </bean> 

   <!-- 定义映射 --> 

   <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> 

      <property name="mapping"> 

         <props> 

            <prop key="login.do">login</prop> 

         </props> 

      </property> 

   </bean> 

   <!-- 定义视图及路径 --> 

   <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 

      <property name="viewClass"> 

         <value>org.springframework.web.servlet.view.InternalResourceView</value> 

      </property> 

      <!-- JSP都放在WEB-INF/jsp目录下 --> 

      <property name="prefix"> 

         <value>/WEB-INF/jsp</value> 

      </property> 

      <!-- JSP页面的后缀都四.JSP --> 

      <property name="suffix"> 

         <value>.jsp</value> 

      </property> 

   </bean> 

   <!-- 定义控制器 --> 

   <bean id="login" class="com.gc.action.Login"> 

      <property name="commandClass"> 

         <value>com.gc.action.User</value> 

      </property> 

      <!-- 指定验证类 --> 

      <property name="validator"> 

         <ref bean="userValidator"/> 

      </property> 

      <!-- 指定失败要返回的页面 --> 

      <property name="formView"> 

         <value>login</value> 

      </property> 

      <property name="successView"> 

         <value>success</value> 

      </property> 

   </bean> 

   <!-- 定义验证类 --> 

   <bean id="userValidator" class="com.gc.action.UserValidator"></bean> 

</beans>

<九>myMVC/WEB-INF/src目录下编写资源文件messages.properties及messages_en_US.properties
messages.properties

title=SpringMVC实例 

username=输入用户名: 

password=输入密码: 

password2=确认密码: 

submit=提交 

welcome=欢迎 

loginSuccess=登录成功 

usernameerror=用户名不正确 

passworderror=密码不正确 

doublepassword=2次密码不一致 
   native2ascii工具转码后 

title=SpringMVC\u5b9e\u4f8b 

username=\u8f93\u5165\u7528\u6237\u540d: 

password=\u8f93\u5165\u5bc6\u7801: 

password2=\u786e\u8ba4\u5bc6\u7801: 

submit=\u63d0\u4ea4 

welcome=\u6b22\u8fce 

loginSuccess=\u767b\u5f55\u6210\u529f 

usernameerror=\u7528\u6237\u540d\u4e0d\u6b63\u786e 

passworderror=\u5bc6\u7801\u4e0d\u6b63\u786e 

doublepassword=2\u6b21\u5bc6\u7801\u4e0d\u4e00\u81f4 
messages_en_US.properties 


title=SpringMVC 

username=username 

password=password 

password2=password2 

submit=submit 

welcome=welcome 

loginSuccess=loginSuccess 

usernameerror=usernameerror 

passworderror=passworderror 

doublepassword=doublepassworderror

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Spring MVC | 异常输出到日志 log4j java

2011-08-11 16:50
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