全局异常

Springboot对Controller层方法进行统一异常处理

【注】如果全部异常处理返回json，那么可以使用 @RestControllerAdvice 代替 @ControllerAdvice ，这样在方法上就可以不需要添加 @ResponseBody。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.sql.SQLException;

/**
 * Created by Administrator on 2019/8/25 0025.
 */
@RestControllerAdvice
public class ControllerExceptionHandleAdvice {
    private final static Logger logger = LoggerFactory.getLogger(ControllerExceptionHandleAdvice.class);
    @ExceptionHandler
    public String handler(HttpServletRequest req, HttpServletResponse res, Exception e) {
        logger.info("Restful Http请求发生异常...");

        if (res.getStatus() == HttpStatus.BAD_REQUEST.value()) {
            logger.info("修改返回状态值为200");
            res.setStatus(HttpStatus.OK.value());
        }
        if (e instanceof NullPointerException) {
            logger.error("代码00：" + e.getMessage(), e);
            return "发生空指针异常";
        } else if (e instanceof IllegalArgumentException) {
            logger.error("代码01：" + e.getMessage(), e);
            return "请求参数类型不匹配";
        } else if (e instanceof SQLException) {
            logger.error("代码02：" + e.getMessage(), e);
            return "数据库访问异常";
        } else {
            logger.error("代码99：" + e.getMessage(), e);
            return "服务器代码发生异常,请联系管理员";
        }
    }
}