Struts2的异常处理
Struts2的异常处理：
?1，定义自己的异常信息类：继承Exception类
??/**
?? * 我自己的异常类
?? * @author 张明学
?? *
?? */
??public class MyException extends Exception {
???private String message;
??
???public MyException(String message) {
????super(message);
????this.message = message;
???}
??
???public String getMessage() {
????return message;
???}
??
???public void setMessage(String message) {
????this.message = message;
???}
??
??}
??
?2，在Action中产生异常
???@Override
???public String execute() throws Exception {
????if (!"mengya".equals(username)) {
?????//模拟产生异常
?????throw new MyException("用户名不存在！");
????} else if (!"xiaobo".equals(password)) {
?????//模拟产生异常
?????throw new MyException("密码错误！");
????} else {
?????return SUCCESS;
????}
??
???}
?
?3，在struts.xml中配置异常
??<package name="mengya" extends="struts-default">
??
??<!-- 全局的异常配置global-results要配置在global-exception-mappings上面 -->
??<global-results>
???<result name="myException">/myException.jsp</result>
??</global-results>
??<global-exception-mappings>
???<exception-mapping result="myException"
????exception="com.mengya.exception.MyException">
???</exception-mapping>
??</global-exception-mappings>
??<action name="login" class="com.mengya.action.LoginAction">
???<!-- 局布的异常用配置 -->
???<!--?
???<exception-mapping result="myException"
????exception="com.mengya.exception.MyException">
???</exception-mapping>
???-->
???<result name="success">/show.jsp</result>
???<!--
???<result name="myException">/myException.jsp</result>
??? -->
??</action>???
