StrutsResultSupport的利用详解编程语言

在有非凡情形时；假如没有异常信息，然则有错误而且有错误信息等内容；此时也需要进行友爱的错误处置惩罚的话，那么可以借助StrutsResultSupport 返回效果类型来实现特定处置惩罚。此种体式格局先需要继续StrutsResultSupport ，然后可以在子类中获取本次请求的相关信息，再凭据相关信息进行效果处置惩罚：

package commons.struts2; 

import a href="http://lib.csdn.net/base/java" title="Java 常识库" target=_blank Java /a .io.PrintWriter; 

import javax.servlet.http.HttpServletResponse; 

import org.apache.struts2.dispatcher.StrutsResultSupport; 

import com.opensymphony.xwork2.ActionInvocation; 

 * result type for output string in action 

 * @author songwei,yaolei b Example: /b 

 * 
 

 * !-- START SNIPPET: example -- 

 * result name="success" type="string" 

 * param name="stringName" stringName /param 

 * /result 

 * !-- END SNIPPET: example -- 

 * 

 *
 */
public class StringResultType extends StrutsResultSupport {
 private static final long serialVersionUID = 1L;
 private String contentTypeName;
 private String stringName = "";
 public StringResultType() {
 super();
 }
 public StringResultType(String location) {
 super(location);
 }
 protected void doExecute(String finalLocation, ActionInvocation invocation)
 throws Exception {
 HttpServletResponse response = (HttpServletResponse) invocation
 .getInvocationContext().get(HTTP_RESPONSE);
 // String contentType = (String)
 // invocation.getStack().findValue(conditionalParse(contentTypeName,
 // invocation)); 
 String contentType = conditionalParse(contentTypeName, invocation);
 if (contentType == null) {
 contentType = "text/plain; charset=UTF-8";
 }
 response.setContentType(contentType);
 PrintWriter out = response.getWriter();
 // String result = conditionalParse(stringName, invocation); 
 String result = (String) invocation.getStack().findValue(stringName);
 out.println(result);
 out.flush();
 out.close();
 }
 public String getContentTypeName() {
 return contentTypeName;
 }
 public void setContentTypeName(String contentTypeName) {
 this.contentTypeName = contentTypeName;
 }
 public String getStringName() {
 return stringName;
 }
 public void setStringName(String stringName) {
 this.stringName = stringName;
 }
} 
 

package test; 

import com.opensymphony.xwork2.ActionSupport; 

public class MyAction extends ActionSupport{ 

 String result="abc"; 

 public String ajax() { 

 return "ajaxResponse"; 

 // getter setter 

 public String getResult() { 

 return result; 

 public void setResult(String result) { 

 this.result = result; 

} 


 !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" 

 result-types 

 result-type name="string" /result-type 

 /result-types 

 action name="myAction" 

 result name="ajaxResponse" type="string" 

 param name="stringName" result /param 

 /result 

 /action 

 /package 

 /struts 

这里界说返回Action的String result变量，即“abc”。

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/11694.html