struts2的异常

index.jsp

 1 <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">    
11     <title>测试异常</title>    
12   </head>
13   
14   <body>
15     <form action="lee/login.action">
16     用户名:<input type="text" name="username" /><br/>
17     密码:<input type="password" name="password" /><br />
18     <input type="submit" value="提交" />
19     </form>
20   </body>
21 </html>

struts.xml

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5 
 6 <struts>
 7     <constant name="struts.enable.DynamicMethodInvocation" value="false" />
 8     <constant name="struts.devMode" value="true" />    
 9     <package name="lee" extends="struts-default">
10         <!-- 此处定义所有的全局结果 -->
11         <global-results>
12             <!-- 逻辑名为sql的结果,映射到/sqlexception.jsp页面 -->
13             <result name="sql">/sqlexception.jsp</result>
14             <!-- 逻辑名为root的结果,映射到/exception.jsp -->
15             <result name="root">/exception.jsp</result>
16         </global-results>
17         <!-- 此处定义所有的全局异常映射 -->
18         <global-exception-mappings>
19             <!-- Action抛出SqlException异常时,转入名为sql的结果 -->
20             <exception-mapping result="sql" exception="java.sql.SQLException"></exception-mapping>
21             <exception-mapping result="root" exception="java.lang.Exception"></exception-mapping>
22         </global-exception-mappings>
23         <!-- 下面配置本系统的Action -->
24         <action name="login" class="lee.LoginAction">
25             <!-- 下面配置了一个局部异常映射,当Action抛出lee.MyException时,转入名为my的结果 -->
26             <exception-mapping result="my" exception="lee.MyException"></exception-mapping>
27             <result name="my">/exception.jsp</result>
28             <result name="error">/error.jsp</result>
29             <result name="success">/welcome.jsp</result>
30         </action>
31     </package>
32 </struts>

MyExction.java

1 package lee;
2 
3 public class MyException extends Exception {     
4         public MyException(String mess){
5             super(mess);
6         }
7 }

LoginAction.java

 1 package lee;
 2 
 3 import java.sql.SQLException;
 4 
 5 import com.opensymphony.xwork2.Action;
 6 
 7 public class LoginAction  implements Action{
 8     private String username;
 9     private String password;
10     //封装服务器处理后的结果
11     private String tip;
12     public String getUsername() {
13         return username;
14     }
15     public void setUsername(String username) {
16         this.username = username;
17     }
18     public String getPassword() {
19         return password;
20     }
21     public void setPassword(String password) {
22         this.password = password;
23     }
24     public String getTip() {
25         return tip;
26     }
27     public void setTip(String tip) {
28         this.tip = tip;
29     }
30     
31     @Override
32     public String execute() throws Exception {
33         String result="";
34         if(getUsername().equalsIgnoreCase("user")){
35             throw new MyException("自定义异常"); 
36         }
37         if(getUsername().equalsIgnoreCase("sql")){
38             throw new SQLException("用户名不能为sql");
39         }
40         if(getUsername().equals("scott")&&getPassword().equals("tiger")){
41             setTip("哈哈,服务器提示!");
42             result=SUCCESS;
43         }
44         else {
45             result=ERROR;
46         }        
47         return result;
48     }    
49 }

sqlexception.jsp

 1 <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 <%@taglib prefix="s" uri="/struts-tags" %>
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'index.jsp' starting page</title>
13 
14   </head>
15   
16   <body>
17     <h1>sqlexception</h1>
18     <h2><s:property value="exception.message" /> </h2>
19     <h3>
20         <s:property value="exceptionStack" />
21     </h3>
22   </body>
23 </html>

在登陆页用户名框中输入sql,然后提交

跳转到sqlexception.jsp页面