2008-02-19

Struts2入门实例

web.xml

 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <filter>
      <filter-name>struts2</filter-name>
      <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>
    <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>


</web-app>

 srtuts.xml (WEB-INF/classes下)

 

<?xml version="1.0" encoding="GBK" ?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <package name="struts" extends="struts-default">
       <action name="Login" class="HelloWorld.LoginAction">
         <result name="success">/helloworld/welcome.jsp</result>
         <result name="error">/helloworld/error.jsp</result>
       </action>
    </package>
</struts>

 

Action：

 

package HelloWorld;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;

public class LoginAction implements Action{
  private String username;
  private String password;
  private String[] books;
  public String[] getBooks() {
    return books;
}
public void setBooks(String[] books) {
    this.books = books;
}
public String execute() throws Exception{
      if(this.getUsername().equals("admin")&&this.getPassword().equals("1234")){
          ActionContext.getContext().getSession().put("user", this.getUsername());
          BookService bs=new BookService();
          this.setBooks(bs.getBooks());
          return SUCCESS;
      }else{
          return ERROR;
      }
  }
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;
}
  
}

 

BookService.java

 

package HelloWorld;

public class BookService {
  private String[] books=new String[]{
          "Spring 2.0",
          "Hibernate 3.2",
          "Struts 2.0"
  };
  public String[] getBooks(){
      return books;
  }
}

 

index.jsp

 

<%@ page language="java" contentType="text/html; charset=gb2312"
    pageEncoding="gb2312"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
  <head> 
    <title></title>
  </head>
  <body>      
     <s:form action="Login">
       <s:textfield name="username" label="用户名"></s:textfield>
       <s:password name="password" label="密码"></s:password>
       <s:submit value="login"></s:submit>
     </s:form>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
   
  </body>
</html>

 

welcome.jsp

 

<%@ page language="java" contentType="text/html; charset=gb2312"
    pageEncoding="gb2312"%>
<%@ page isELIgnored="false" %>
    
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
  <head> 
    <title></title>
  </head>
  <body>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
   欢迎${sessionScope.user}登陆
   <c:out value="${requestScope.now}"></c:out>
   <br>
   <table border="1">
     <s:iterator value="books" status="index">
         <s:if test="#index.odd==true">
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