springboot框架的全局异常处理方案详解
作者：一起随缘
这篇文章主要介绍了springboot框架的全局异常处理方案,本文给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
系统框架搭建的前期过程中，为了约束代码规范，我们会对一些通用功能做一些处理，比如声明一些系统公用错误类、封装通用返回结果、统一异常处理等，这样做的优势是团队开发过程中能够形成统一的代码规范，增强代码可读性，同时又便于后期代码维护。本文主要介绍下框架中异常的处理：
1.声明全局异常处理类，并添加@ControllerAdvice和@RestController注解
代码如下：
@ControllerAdvice
@RestController
public class GlobalExceptionHandler {
private final Logger logger = Logger.getLogger(GlobalExceptionHandler.class);
//空指针异常
@ExceptionHandler(NullPointerException.class)
public Map<String, Object> nullPointer(NullPointerException e,HttpServletRequest req){
logger.error(e.getMessage());
e.printStackTrace();
return ResultObject.newResultObj(ErrorCode.NULLPOINTER);
}
//IO异常
@ExceptionHandler(IOException.class,HttpServletRequest req, HttpServletResponse res)
public Map<String, Object> IOException(IOException e){
logger.error(e.getMessage());
e.printStackTrace();
return ResultObject.newResultObj(ErrorCode.IOEXCEPTION);
}
//权限不足异常
@ExceptionHandler(UnauthorizedException.class)
public Map<String, Object> unauth(HttpServletRequest req, HttpServletResponse res){
return ResultObject.newResultObj(ErrorCode.UNAUTH);
}
//未登录异常
@ExceptionHandler(AuthorizationException.class)
public Map<String, Object> unlogin(HttpServletRequest req, HttpServletResponse res){
return ResultObject.newResultObj(ErrorCode.NOTLOGIN);
}
//其它异常
@ExceptionHandler(Exception.class)
public Map<String, Object> error(Exception e,HttpServletRequest req, HttpServletResponse res){
logger.error(e.getMessage());
e.printStackTrace();
return ResultObject.newResultObj(ErrorCode.SYSTEM);
}
}
2.声明系统通用错误处理类
/**
* 系统通用错误处理类
*/
public class ErrorCode {
//返回码
private int code = 0;
//描述信息
private String errmsg = "SUCCESS";
//成功
public static final ErrorCode SUCCESS = new ErrorCode(0,"SUCCESS");
public static final ErrorCode PARAMS = new ErrorCode(100000,"参数错误");
public static final ErrorCode SYSTEM = new ErrorCode(100001,"系统错误");
public static final ErrorCode UNLOGIN = new ErrorCode(100002,"未登录");
public static final ErrorCode UNAUTH = new ErrorCode(100003,"权限错误");
public static final ErrorCode NULLPOINTER = new ErrorCode(100004,"空指针错误");
public static final ErrorCode IOEXCEPTION = new ErrorCode(100005,"IO错误");
public static final ErrorCode UPLOAD_FAIL = new ErrorCode(100006,"文件上传失败");
public static final ErrorCode REPEAT = new ErrorCode(100007,"数据已存在");
public ErrorCode() {}
@Override
public String toString() {
return String.format("{\"errmsg\": \"%s\", \"code\": %d}", errmsg, code);
}
public int getCode() {
return code;
}
public ErrorCode setCode(int code) {
this.code = code;
return this;
}
public String getErrmsg() {
return errmsg;
}
public ErrorCode setErrmsg(String errmsg) {
this.errmsg = errmsg;
return this;
}
public ErrorCode(int code, String errmsg) {
this.code = code;
this.errmsg = errmsg;
}
}
3.声明全局异常处理类中的结果返回类
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import com.xxx.ErrorCode;//此处引用自己errorCode类所在的包路径
import org.json.JSONObject;
public class ResultObject {
/**
* 输出错误信息
* @param errorCode
*/
public static Map<String, Object> newResultObj(ErrorCode errorCode){
Map<String, Object> obj = new HashMap<String, Object>();
obj.put("code", errorCode.getCode());
obj.put("errmsg", errorCode.getErrmsg());
return obj;
}
/**
* 输出带数据的成功信息
* @param data
*/
public static Map<String, Object> newResultObj(Object data){
Map<String, Object> obj = new HashMap<String, Object>();
obj.put("code", ErrorCode.SUCCESS.getCode());
obj.put("errmsg", ErrorCode.SUCCESS.getErrmsg());
if(null != data){
obj.put("data", data);
}
return obj;
}
/**
* 输出带数据的错误信息
* @param errorCode
* @param data
*/
public static Map<String, Object> newResultObj(ErrorCode errorCode, Object data){
Map<String, Object> obj = new HashMap<String, Object>();
obj.put("code", errorCode.getCode());
obj.put("errmsg", errorCode.getErrmsg());
if(null != data){
obj.put("data", data);
}
return obj;
}
/**
* 输出结果
*/
public static void outputResult(HttpServletResponse response, ErrorCode errorCode){
try {
JSONObject json = new JSONObject();
json.put("code", errorCode.getCode());
json.put("errmsg", errorCode.getErrmsg());
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json;charset=UTF-8");
response.getWriter().write(json.toString());
} catch (Exception e1) {
}
}
}
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