定义一个控制器通知组件,处理所有Controller所发生的异常。
controller/advice/ExceptionAdvice.java
package com.nowcoder.community.controller.advice;
import com.nowcoder.community.util.CommunityUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
@ControllerAdvice(annotations = Controller.class)
public class ExceptionAdvice {
private static final Logger logger = LoggerFactory.getLogger(ExceptionAdvice.class);
@ExceptionHandler({Exception.class})
public void handleException(Exception e, HttpServletRequest request, HttpServletResponse response) throws IOException {
logger.error("服务器发生异常: " + e.getMessage());
for (StackTraceElement element : e.getStackTrace()) {
logger.error(element.toString());
}
String xRequestedWith = request.getHeader("x-requested-with");
if ("XMLHttpRequest".equals(xRequestedWith)) {
response.setContentType("application/plain;charset=utf-8");
PrintWriter writer = response.getWriter();
writer.write(CommunityUtil.getJSONString(1, "服务器异常!"));
} else {
response.sendRedirect(request.getContextPath() + "/error");
}
}
}