先来看下没加全局异常,发生报错的返回
简短的

长一点的

这样报错抛给前端会是一大堆,不方便处理

gatway的全局异常处理只能捕获模块调用间的异常,单独的模块报错还是要用到 @ControllerAdvice

上核心代码

package com.zhzh.config.excep;import com.zhzh.model.ResultVO;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.SQLException;@ControllerAdvice
public class CustomExceptionHandler {@ResponseBody@ExceptionHandler(value = Exception.class)public ResultVO errorHandler(Exception ex) {String msg ="";//判断异常的类型,返回不一样的返回值if(ex instanceof MissingServletRequestParameterException){msg ="缺少必需参数："+((MissingServletRequestParameterException) ex).getParameterName();}else if(ex instanceof IllegalArgumentException){msg = "参数不合法";}else if(ex instanceof NullPointerException){msg ="空指针异常";}else if(ex instanceof ClassCastException){msg = "类型强制转换异常";}else if(ex instanceof ArrayIndexOutOfBoundsException){msg ="数组索引越界";}else if(ex instanceof NumberFormatException){msg = "字符串转换为数字异常";}else if(ex instanceof SQLException){msg = "操作数据库异常";}else if(ex instanceof IOException){msg ="输入/输出流异常";}else if(ex instanceof NoSuchMethodException){msg = "方法未找到异常";}else if(ex instanceof ArithmeticException){msg = "数学运算（分母为0）异常";}else if(ex instanceof ClassNotFoundException){msg = "指定的类不存在";}else{msg=ex.getMessage();}ex.printStackTrace();StringWriter errorsWriter = new StringWriter();ex.printStackTrace(new PrintWriter(errorsWriter));String error = errorsWriter.toString();ResultVO resultVO = new ResultVO(500,msg, error);return resultVO;}
}

这里捕获的常见的异常,根据实际使用修改,msg的报错信息可自行修改

测试


好像更多了…不过前端只用抛出msg里面的内容