一、Struts2的流程

一、Struts2的流程

1.Struts2简单的开发开发步骤

　　模拟一个简单的登陆模块说明步骤：

（1）在web.xml中定义核心Filter来拦截用户请求；

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <!-- 定义Struts2的核心Filter -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <!-- 让Struts2的核心Filter拦截所有请求 -->
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

 

（2）如果需要以POST方式提交请求，则定义包含表单数据的JSP页面。如果仅仅是以GET方式发送请求则无需此步；

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!-- 导入Struts2的标签库 -->
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>模拟登陆页面</title>
</head>
<body>
<s:form action="login">
    <s:textfield name="username" key="user"/>
    <s:password name="password" key="pass"/>
    <s:submit key="login"/>
</s:form>    
</body>
</html>

 

（3）定义处理用户请求的Action类；

import com.opensymphony.xwork2.ActionSupport;

public class LoginTsest1 extends ActionSupport{

    private static final long serialVersionUID = 1L;
    
    //定义封装请求的username和password
    private String username;
    private String password;
    //setter、getter方法
    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;
    }
    //定义处理用户请求的execute()方法
    public String execute() throws Exception{
        //模拟登陆
        //不进行数据库访问等内容
        if(getUsername().equals("123456")&&getPassword().equals("123456")){
            return SUCCESS;
        }else{
            return ERROR;
        }
    }
}

 

（4）配置Action,并配置处理结果和物理视图资源之间的对应关系；

　　在src目录下的sturts.xml文件中配置Action

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />
    <!-- 设置OGNL表达式可以访问静态方法 -->
    <constant name="struts.ognl.allowStaticMethodAccess" value="true"/>
    <package name="test_1" extends="struts-default">
        <action name="*">
            <result>/WEB-INF/_1/login.jsp</result>
        </action>
        
        <action name="login" class="_1_Action.LoginTest1">
            <!-- 定义逻辑视图与物理资源之间的映射 -->
            <result name="error">/WEB-INF/_1/error/err.jsp</result>
            <result name="success">/WEB-INF/_1/success/success.jsp</result>
        </action>

    </package>
</struts>

 

 

 

（5）编写物理视图资源

success.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>登陆成功</title>
</head>
<body>
登陆成功！
</body>
</html>

 

err.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>登陆失败</title>
</head>
<body>
登陆失败
</body>
</html>

 

2.Struts2的流程

posted @ 2017-08-03 16:30  丶theDawn  阅读(136)  评论(0)  编辑  收藏  举报