配置系统异常处理器

1.后台模拟一个异常

@RequestMapping(value = "/myexception.do", produces = "text/html;charset=utf-8")    public String myexception() {        int a=5/0;        return "/error.jsp";    }

2.未配置系统异常时,前台访问报错500,配置系统异常处理器后成功进入错误页面

3.前台页面

错误页面${ex.message}

效果图:

配置自定义异常处理器

1.创建自定义异常类

public class MyException extends Exception{    public MyException() {        super();    }    public MyException(String message) {        super(message);    }}

public class NameException extends MyException {    public NameException() {        super();    }    public NameException(String message) {        super(message);    }}

public class AgeException extends MyException {    public AgeException() {        super();    }    public AgeException(String message) {        super(message);    }}

2.配置处理器方法

@RequestMapping(value = "/exception.do", produces = "text/html;charset=utf-8")    public String exception(String name, Integer age) throws NameException, AgeException {        if (!name.equals("admin")) {            throw new NameException("用户名错误");        }        if (age > 40) {            throw new AgeException("年龄太大");        }        return "/result.jsp";    }

3.配置applicationContext.xml

         
             
              
              
              
                  
                       
        
         /customError/userNameError.jsp
                        
        
         /customError/userAgeeError.jsp
                    
               
          
     

配置完成,再出现异常时就对进入对应的错误页面