1、@ExceptionHandler 进行局部的异常处理
package controller;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import exception.ExceptionUtil;
@Controller
public class ExceptionController {
private static Logger logger = LogManager.getLogger(ExceptionController.class.getName());
@RequestMapping("/exception/{id}")
@ResponseBody
public Object hello(@PathVariable String id) {
if(id.equals("1")) {
int i = 1/0;
return null;
} else if(id.equals("2")) {
throw new NullPointerException("空指针异常");
} else if(id.equals("3")) {
throw new ExceptionUtil("自定义异常");
}
else {
return "ok";
}
}
/**
* 处理局部的ArithmeticException异常
* @return
*/
@ExceptionHandler(ArithmeticException.class)
@ResponseBody
public String handleArithmeticException(){
return "ArithmeticException";
}
/**
* 处理局部的NullPointerException异常
* @return
*/
@ExceptionHandler(NullPointerException.class)
@ResponseBody
public String handleNullPointerException(){
return "NullPointerException";
}
/**
* 处理自定义异常
* @return
*/
@ExceptionHandler(ExceptionUtil.class)
@ResponseBody
public String handleExceptionUtil() {
return "ExceptionUtil";
}
}
ExceptionUtil的具体代码为
package exception;
public class ExceptionUtil extends RuntimeException {
public ExceptionUtil(String string) {
super(string);
}
}
运行结果
2、@ControllerAdvice+@ExceptionHandler 构建全局异常处理
首先定义一个全局异常处理类MyGlobalExceptionHandler，该类加上了@ControllerAdvice注解，同时使用@ExceptionHandler对不同异常类的处理方法进行注解
@ControllerAdvice
public class MyGlobalExceptionHandler {
/**
* 处理局部的ArithmeticException异常
* @return
*/
@ExceptionHandler(ArithmeticException.class)
@ResponseBody
public String handleArithmeticException(){
return "ArithmeticException";
}
/**
* 处理局部的NullPointerException异常
* @return
*/
@ExceptionHandler(NullPointerException.class)
@ResponseBody
public String handleNullPointerException(){
return "NullPointerException";
}
/**
* 处理自定义异常
* @return
*/
@ExceptionHandler(ExceptionUtil.class)
@ResponseBody
public String handleExceptionUtil() {
return "ExceptionUtil";
}
}
接着需要在SpringContext.xml文件中对MyGlobalExceptionHandler所在包进行扫描
<context:component-scan base-package="handler" />
运行结果
参考：
1、https://blog.csdn.net/qq_29914837/article/details/82697089
2、https://www.cnblogs.com/lenve/p/10748453.html
3、https://www.cnblogs.com/stamp/p/allex.html
4、https://www.cnblogs.com/Coder-Pig/p/7340694.html
原文：https://www.cnblogs.com/wylwyl/p/13283237.html