struts2.1.6 result 04

最新推荐文章于 2017-11-14 18:43:00 发布

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最新推荐文章于 2017-11-14 18:43:00 发布

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分类专栏： strust 2 文章标签： struts string action exception class user

本文链接：https://blog.youkuaiyun.com/tanyit/article/details/6963613

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Result

1. 常用四种类型：

a) dispatcher（默认）

b) redirect

c) chain

d) redirectAction

2. 全局结果集

a) global-results | extends

3. 动态结果（了解）

a) 在action中保存一个属性，存储具体的结果location

4. 传递参数

a) 客户端跳转才需要传递

b) ${}表达式（不是EL）

result 类型跳转

Result 类型 
dispatcher 
redirect 
chain 
redirectAction 
freemarker 
httpheader 
stream 
velocity 
xslt 
plaintext 
tiles

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<html>
  <head>
  </head>
  <body>
	Result 类型
	<ol>
		<li><a href="r/r1">dispatcher</a></li>
	<li><a href="r/r2">redirect</a></li>
	<li><a href="r/r3">chain</a></li>
	<li><a href="r/r4">redirectAction</a></li>
	<li>freemarker</li>
	<li>httpheader</li>
	<li>stream</li>
	<li>velocity</li>
	<li>xslt</li>
	<li>plaintext</li>
	<li>tiles</li>
	</ol>
  </body>
</html>

 <package name="resultType" extends="struts-default" namespace="/r">
        <action name="r1">
            <result type="dispatcher"> 
                /r1.jsp
            </result>
        </action>
        
         <action name="r2">
            <result type="redirect"> 
                /r2.jsp
            </result>
        </action>
        
         <action name="r3">
            <result type="chain"> 
                r1
            </result>
        </action>
        
         <action name="r4">
            <result type="redirectAction"> 
                r2
            </result>
        </action>
    </package>

GlobalResult

package com.demo.action;

import com.opensymphony.xwork2.ActionSupport;

public class AdminAction extends ActionSupport {
	@Override
	public String execute() throws Exception {
		return "mainpage" ;
	}
}

package com.demo.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport{
    private int type;

    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }
    
    @Override
    public String execute() throws Exception {
        if(type == 1) {
            return 
            "success" ;
        } else if (type == 2) {
            return "error" ;
        }
        return "mainpage" ;
    }
}

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<html>
  <head>
  </head>
  <body>
	Resutl 类型
<ol>
	<li><a href="user/user?type=1">返回success</a></li>
	<li><a href="user/user?type=2">返回error</a></li>
	<li><a href="user/user?type=3">返回global result</a></li>
	<li><a href="admin/admin">admin，继承user包</a></li>
</ol>
</html>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<constant name="struts.devMode" value="true"/>     
    <package name="user" extends="struts-default" namespace="/user">
  
     <global-results>
     	<result name="mainpage">/main.jsp</result>
     </global-results>
		
	
	      
      <action name="user" class="com.demo.action.UserAction">
	     <result>/user_success.jsp</result> 
      	<result name="error">/user_error.jsp</result>
      </action>
    </package>
    
    <package name="admin" namespace="/admin" extends="user">
    	<action name="admin" class="com.demo.action.AdminAction">
    		<result>/admin.jsp</result>
    	</action>
    </package>
</struts>

<package name="admin" namespace="/admin" extends="user"> 继承上面package包的内容

共用的actioon

     <global-results>
     	<result name="mainpage">/main.jsp</result>
     </global-results>

DynamicResult

package com.demo.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
	private int type;
	private String r;

	public String getR() {
		return r;
	}

	public void setR(String r) {
		this.r = r;
	}

	public int getType() {
		return type;
	}

	public void setType(int type) {
		this.type = type;
	}

	@Override
	public String execute() throws Exception {
		if (type == 1) {
			r = "/user_success.jsp";
		} else if (type == 2) {
			r = "/user_error.jsp";
		}
		return "success";
	}
}

 <body>
    动态结果一定不要往了为动态结果的保存设置set get方法
<ol>
    <li><a href="user/user?type=1">返回seuccess</a></li>
    <li><a href="user/user?type=2">返回error</a></li>
</ol>
  </body>

<package name="user" namespace="/user" extends="struts-default">
        <action name="user" class="com.demo.action.UserAction">
            <result>${r}</result>
        </action>
    </package> 

User Success !!!
    <s:property value="r"/>
    <s:debug></s:debug>

package com.demo.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport{
	private int type;

	public int getType() {
		return type;
	}

	public void setType(int type) {
		this.type = type;
	}
	
	@Override
	public String execute() throws Exception {
		return SUCCESS;
	}
}

 <package name="user" namespace="/user" extends="struts-default">
    	
	    <action name="user" class="com.demo.action.UserAction">
	    	<result type="redirect">/user_success.jsp?t=${type}</result>
	    </action>	    
    </package>

向结果传参数
<ol>
	<li>
		<a href="user/user?type=1">传参数</a>
	</li>
</ol>

 <body>
	User Success !!<br/>
	from valuestack: <s:property value="t"/><br/>
	from actioncontext: <s:property value="#prameters.t"/>
	<s:debug></s:debug>
  </body>

User Success !!
from valuestack: 
from actioncontext: 1 
[Debug]