1.配置错误页面 404.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>主页</title> </head> <body> <html> <body> <h1><b th:text="${errorMsg}"></b></h1> </body> </html>
2.自定义异常处理器
package com.qcby.util; import com.qcby.entity.SysException; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class SysExceptionResolver implements HandlerExceptionResolver { /** * 程序出现了异常，调用异常处理器中的方法 * @param httpServletRequest * @param httpServletResponse * @param o * @param e * @return */ @Override public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) { e.printStackTrace(); //在命令行打印异常信息在程序中出错的位置及原因。 // 做强转 SysException exception = null; // 判断 if(e instanceof SysException){ exception = (SysException)e; }else{ exception = new SysException("系统正在维护，请联系管理员"); } ModelAndView mv = new ModelAndView(); mv.addObject("errorMsg",exception.getMessage()); // 设置跳转的页面 mv.setViewName("404"); return mv; } }
3.自定义异常类
/** * 异常处理类 */ public class SysException extends Exception{ // 提示消息 private String message; public SysException(String message){ this.message = message; } @Override public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } @Override public String toString() { return "SysException{" + "message='" + message + '\'' + '}'; } }
4.配置异常处理器
<!--配置异常处理器--> <bean id="sysExceptionResolver" class="com.qcby.util.SysExceptionResolver" />
5.Controller测试
/** * 使用异常处理器方式 * @return */ @RequestMapping("/findAll.do") public String findAll(){ System.out.println("执行了..."); // 模拟异常 int a = 10/0; return "suc"; }