异常统一处理

• 在class注解上 @ControllerAdvice

• 在方法上注解上 @ExceptionHandler(value = Exception.class)

       /*

        * 返回json数据或者String数据：

        * 那么需要在方法上加上注解：@ResponseBody

        * 添加return即可。

        */

       

       /*

        * 返回视图：

        * 定义一个ModelAndView即可，

        * 然后return;

        * 定义视图文件(比如：error.html,error.ftl,error.jsp);

        *

        */
package com.osvue.win.app.spr;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

@ControllerAdvice
public class GlobalExceptionHoder {

 @ResponseBody
 @ExceptionHandler(value = Exception.class)
 public String defaultErrorHandler(HttpServletRequest req, Exception e) {
  System.out.println("global exception control ...");
  e.printStackTrace();
  return "error";
 }
}

log4j

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
private Logger logger =  LoggerFactory.getLogger(this.getClass());

优雅注入

 @EnableConfigurationProperties({CustomProperties.class})
@ConfigurationProperties(prefix = "custom.datasource.ds1")
public class CustomProperties {
 
 private String url;
 private String driverClassName;
 private String username;
 private String password;
}
// 在启动类中加入：
@EnableConfigurationProperties({BlogProperties.class})