23_SpringMVC的异常处理

1. 自定义异常类

public class SysException extends Exception{

private static final long serialVersionUID = 4055945147128016300L;

 // 异常提示信息

private String message;

public String getMessage() {

 return message; }

public void setMessage(String message) {

 this.message = message; }

public SysException(String message) {

 this.message = message; }

2. 自定义异常处理器

public class SysExceptionResolver implements HandlerExceptionResolver{

/*** 跳转到具体的错误页面的方法 */

public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {

 ex.printStackTrace();

SysException e = null;

// 获取到异常对象

if(ex instanceof SysException) {

 e = (SysException) ex

; }else { e = new SysException("请联系管理员"); }

ModelAndView mv = new ModelAndView();

// 存入错误的提示信息

mv.addObject("message", e.getMessage());

// 跳转的Jsp页面

mv.setViewName("error");

return mv; } }

3. 配置异常处理器