SpringBoot异常

# Spring 异常

在Spring中使用 @ControllerAdvice和@ExceptionHandler处理全局异常。

# 案例

全局异常处理

GlobalExceptionHandler

@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(IllegalArgumentException.class)
    public Object illegalHandler(IllegalArgumentException e){
        System.out.println("进入illegalHandler");
        
        return ResponseEntity.status(400).body(R.failed(e.getMessage()));
    }

    @ExceptionHandler(Exception.class)
    public Object common(Exception e){
        System.out.println("进入commonHandler");
        return ResponseEntity.status(400).body(e.getMessage());
    }

}

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测试异常 HelloController

@RestController
@RequestMapping("/api")
public class HelloController {

    @RequestMapping("/data")
    public Object data(){
        return R.ok("恭喜你，成功获取到数据");
    }
    @RequestMapping("/hello")
    public Object hello(){
        throw  new IllegalArgumentException("无效参数");
    }

    @RequestMapping("/common")
    public Object common(){
        int i=5/0;

        return "common";
    }
}

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@Data
@NoArgsConstructor
@AllArgsConstructor
public class R {

    private String code;
    private String message;
    private Object data;

    public R(String code, String message) {
        this.code = code;
        this.message = message;
    }

    public static R ok(){
        return ok(null);
    }
    public static R ok(Object data){
        R r=new R("0","操作成功",data);
        return r;
    }
    public static R failed(){

        return failed(null);
    }
    public static R failed(Object data){
        R r=new R("1","操作失败",data);
        return r;
    }

}

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pom 文件

<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
		<groupId>org.projectlombok</groupId>
		<artifactId>lombok</artifactId>
		<optional>true</optional>
</dependency>

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源码地址 (opens new window)

Last Updated: 2024/07/26, 16:12:04

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