1.自定义异常类与自定义异常处理器
1).自定义异常类
/**
*自定义异常类继承Exception
*/
public class SysException extends Exception {
private String message;
@Override
public String getMessage() {
return message;
}
public SysException(String message){
this.message=message;
}
}
2).自定义异常处理器
/**
* 自定义异常处理器实现HandlerExceptionResolver接口
*/
public class SysExceptionResolve implements HandlerExceptionResolver {
@Override
public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
ModelAndView mv = new ModelAndView();
SysException sysException =null;
if(e instanceof SysException){
sysException= (SysException) e;
}else {
sysException = new SysException("服务器进入二次元了");
}
mv.addObject("message",sysException.getMessage());
mv.setViewName("error");
return mv;
}
}
2.配置自定义异常处理器和编写error友好界面
1). 在resources目录下的xml文件中配置bean
<!--配置自定义异常处理器-->
<bean id="sysExceptionResolve" class="cn.itcast.controller.utils.SysExceptionResolve"></bean>
<!--视图解析器--><bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"></property> <property name="suffix" value=".jsp"></property></bean>
2).编写error友好界面
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>异常界面</title>
</head>
<body>
<h3>${message}</h3>
</body>
</html>
3.测试结果
测试结果的前台代码
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <body> <h2>Hello World!</h2> <a href="/user/exception">Exception测试</a> </body> </html>
测试结果的后台代码
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/exception")
public String testException() throws SysException {
System.out.println("testException...");
try {
int a = 10/0;
} catch (Exception e) {
e.printStackTrace();
throw new SysException("查询数据出错了");
}
return "success";
}
}
原文地址：https://www.cnblogs.com/georgeJavaEE/p/9782708.html
时间： 2024-08-07 19:52:31