struts2的Result配置

在struts-default.xml

<result-types>   
              <!--配置Action连接结果-->   
            <result-type name="chain" class="com.opensymphony.xwork2.ActionChainResult"/>   
              <!--配置默认连接结果-->   
            <result-type name="dispatcher" class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>   
            <!--配置freemarker结果类型-->   
            <result-type name="freemarker" class="org.apache.struts2.views.freemarker.FreemarkerResult"/>   
            <!--配置http请求的类型-->   
            <result-type name="httpheader" class="org.apache.struts2.dispatcher.HttpHeaderResult"/>   
            <!--配置重定向结果类型-->   
            <result-type name="redirect" class="org.apache.struts2.dispatcher.ServletRedirectResult"/>   
            <!--配置重定向action结果类型-->   
            <result-type name="redirectAction" class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>   
            <!--配置stream结果类型-->   
            <result-type name="stream" class="org.apache.struts2.dispatcher.StreamResult"/>   
             <!--配置velocityResult结果类型-->   
            <result-type name="velocity" class="org.apache.struts2.dispatcher.VelocityResult"/>   
            <result-type name="xslt" class="org.apache.struts2.views.xslt.XSLTResult"/>   
            <result-type name="plainText" class="org.apache.struts2.dispatcher.PlainTextResult" />   
            <!-- Deprecated name form scheduled for removal in Struts 2.1.0. The camelCase versions are preferred. See ww-1707 -->   
            <result-type name="redirect-action" class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>   
            <result-type name="plaintext" class="org.apache.struts2.dispatcher.PlainTextResult" />   
        </result-types>

例子

struts.xml   
<?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>   

       <package name="test" extends="struts-default">   
        <action name="reg" class="com.struts2.HelloWorld">   
           <result name="success" type="chain">index</result>   
          <result name="ERROR" type="chain">   
             <param name="actionName">reg</param>   
         </result>   
           <result name="input" type="chain">   
               <param name="actionName">reg</param>   
           </result>   

        </action>   
        <action name="index" class="com.struts2.HelloWorld" method="goIndex">   
          <result name="success">   
              <param name="location">/index.jsp</param>   
          </result>   
        </action>   
      </package>   


    </struts>   
action   
package com.struts2;   

import java.util.Date;   
import java.util.Map;   

import com.opensymphony.xwork2.ActionContext;   
import com.opensymphony.xwork2.ActionSupport;   

public class HelloWorld extends ActionSupport{   
  /**  
     *   
     */  
private static final long serialVersionUID = 1L;   
private Date date2;   
private String msg;      
public String getMsg() {   
    return msg;   
}   
public void setMsg(String msg) {   
    this.msg = msg;   
}   
public Date getDate2() {   
    return date2;   
}   
public void setDate2(Date date2) {   
    this.date2 = date2;   
}   
public String getUsername() {   
        return username;   
    }   
    public void setUsername(String username) {   
        this.username = username;   
    }   
    public int getAge() {   
        return age;   
    }   
    public void setAge(int age) {   
        this.age = age;   
    }   
private String username;   
   private  int age;   
   @SuppressWarnings("unchecked")   
public String goIndex(){   
//     Map<String,String> map=null;   
//   if(this.getUsername().equals(""))   
//       return ERROR;   
//   else {   
//   map=ActionContext.getContext().getSession();   
//   map.put("username", this.getUsername());   
//   System.out.println ("姓名"+getUsername()+"\t 年龄："+this.getAge()+"\t注册日期"+this.getDate2());   
//       return SUCCESS;   
//   }   
       Map<String,String> map=null;   
       map=ActionContext.getContext().getSession();   
       map.put("username", this.getUsername());   
       System.out.println ("姓名"+getUsername()+"\t 年龄："+this.getAge()+"\t注册日期"+this.getDate2());   
       return SUCCESS;   

   }   

@Override  
public void validate() {   
    if(username.length()>10){   
        this.addFieldError("username",  "用户名太长了");   
    }   
    if(username.equals("")){   
        this.addFieldError("username", "用户名不能为空");   
    }   
    if(age<0||age>150){   
        this.addFieldError("age", "请输入合法的年龄");   
    }   
}   
}