<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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>top.ytheng</groupId><artifactId>springboot-demo</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.5.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><optional>true</optional><scope>true</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>
</project>

package top.ytheng.demo.domain;public class MyException extends RuntimeException {private static final long serialVersionUID = 1L;public MyException(String code, String msg) {this.code = code;this.msg = msg;}private String code;private String msg;public String getCode() {return code;}public void setCode(String code) {this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}}

package top.ytheng.demo.domain;import java.util.HashMap;
import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.ModelAndView;//如果返回的是Json格式的数据，
//可以使用@ResponseBody+@ControllerAdvice替换@RestControllerAdvice
@RestControllerAdvice
//@ControllerAdvice
public class CustomExtHandler {private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);//捕获全局异常，处理所有不可知的异常@ExceptionHandler(value=Exception.class)//@ResponseBodypublic Object handleException(Exception e, HttpServletRequest request) {LOG.error("msg:{},url:{}", e.getMessage(), request.getRequestURL());Map<String, Object> map = new HashMap<>();map.put("code", 100);map.put("msg", e.getMessage());map.put("url", request.getRequestURL());return map;}//自定义异常//需要添加thymeleaf依赖//路径：src/main/resources/templates/error.html@ExceptionHandler(value=MyException.class)public Object handleMyException(MyException e, HttpServletRequest request) {//返回Json数据，由前端进行界面跳转//Map<String, Object> map = new HashMap<>();//map.put("code", e.getCode());//map.put("msg", e.getMsg());//map.put("url", request.getRequestURL());//return map;//进行页面跳转ModelAndView modelAndView = new ModelAndView();modelAndView.setViewName("error.html");modelAndView.addObject("msg", e.getMsg());return modelAndView;}
}

package top.ytheng.demo.controller;import java.util.HashMap;
import java.util.Map;import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import top.ytheng.demo.domain.MyException;@RestController
@RequestMapping("/exce")
public class ExceptionController {@RequestMapping("/api/v1/exce")public Object testException() {Map<String, Object> map = new HashMap<>();map.put("name", "ytheng");map.put("pwd", 123456);int data = 1/0;return map;}@RequestMapping("/api/v1/myexce")public Object testMyException() {throw new MyException("500", "my ext异常");}
}

package top.ytheng.demo;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication //等于下面3个
//@SpringBootConfiguration
//@EnableAutoConfiguration
//@ComponentScan
public class DemoApplication {public static void main(String[] args) {SpringApplication.run(DemoApplication.class, args);}}

#端口号
server.port=8090#当前项目根目录下创建爱你日志文件
logging.file=C:\\Users\\tianheng\\eclipse-workspace\\springboot.log

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body><h1>错误信息界面</h1>
</body>
</html>

http://localhost:8090/exce/api/v1/exce
http://localhost:8090/exce/api/v1/myexce