SpringBoot(十四)-----异常处理

SpringBoot一共有五种异常处理的方式

方式一：@ControllerAdvice+@ExceptionHandler 注解处理异常

GlobalExceptionHandler.java

package com.zk.myspringboot002;

import java.util.HashMap;
import java.util.Map;

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

//全局捕获异常
@ControllerAdvice
public class GlobalExceptionHandler {
	@ExceptionHandler(RuntimeException.class)
	@ResponseBody
	public Map<String,Object> resultError(){
		Map<String,Object> result=new HashMap<String,Object>();
		result.put("errorCode", "500");
		result.put("errorMsg", "系统错误");
		return result;
	}
}

　SpringBootApplicationTwice.java

package com.zk.myspringboot002;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@EnableAutoConfiguration
@SpringBootApplication
public class SpringBootApplicationTwice {
	public static void main(String[]args){
        SpringApplication.run(SpringBootApplicationTwice.class, args);
    }
    public static void run(String...arg0) {
        System.out.println("Hello world from Command Line Runner");
    }
}

　TestController.java

package com.zk.myspringboot002;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

//标识该接口全部返回json格式
@RestController
public class TestController {
	
	@RequestMapping("/success")
	public String success() {
		return "success";
	}
	
	@RequestMapping("/getMap")
	public Map<String,Object> index() {
		Map<String,Object> result=new HashMap<String,Object>();
		result.put("errorCode", "200");
		result.put("errorMsg", "message");
		return result;
	}
	
	
	
	@RequestMapping("/fail")
	public String error() {
		int i=1/0;
		return "error";
	}
}

　 pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>myspringboot002</groupId>
  <artifactId>myspringboot002</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <parent>
  	<groupId>org.springframework.boot</groupId>
  	<artifactId>spring-boot-starter-parent</artifactId>
  	<version>1.3.3.RELEASE</version>
  </parent>
  <dependencies>
  	<dependency>
  		<groupId>org.springframework.boot</groupId>
  		<artifactId>spring-boot-starter-web</artifactId>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework.boot</groupId>
  		<artifactId>spring-boot-starter-freemarker</artifactId>
  	</dependency>
  </dependencies>
</project>

　　运行结果如下：