1. 编写自定义异常类
package cn.jfjb.crud.exception; public class UserNotExistException extends RuntimeException { public UserNotExistException() { super("用户不存在"); } }
2. 处理自测试异常
package cn.jfjb.crud.handler; import cn.jfjb.crud.exception.UserNotExistException; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody; import java.util.HashMap; import java.util.Map; @ControllerAdvice public class MyExceptionHandler { @ResponseBody @ExceptionHandler(UserNotExistException.class) public Map<String, Object> handleException(Exception e) { Map<String, Object> map = new HashMap<>(); map.put("code", "user.notexist"); map.put("message", e.getMessage()); return map; } }
3. 配置application.yml文件(不配置的话无法获取exception)
server: error: include-exception: true
4. 编写测试
package cn.jfjb.crud.controller; import cn.jfjb.crud.exception.UserNotExistException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; @Controller public class HelloController { @RequestMapping({"/testException"}) public String testException(@RequestParam("user") String user) { if (user != "aaa") { throw new UserNotExistException(); } return "index"; } }
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