@ControllerAdvice + @ExceptionHandler

使用 @ControllerAdvice 注解处理全局异常
实际开发中，需要对异常分门别类的进行处理，使用 @ControllerAdvice + @ExceptionHandler 注解能够处理全局异常，这种方式推荐使用，可以根据不同的异常对不 同的异常进行处理。
   使用方式：定义一个类，使用 @ControllerAdvice 注解该类，使用 @ExceptionHandler 注解方法

<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>com.advice</groupId>
  <artifactId>ExceptionAdvice</artifactId>
  <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <!-- 声明项目配置依赖编码格式为 utf-8 -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <fastjson.version>1.2.24</fastjson.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.3.1</version>
            
        </dependency>
        <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>

    </dependencies>
  
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

package com.tszr.exception.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@ControllerAdvice
public class GlobalException {
    private static final Logger log = LoggerFactory.getLogger(GlobalException.class);

    @RequestMapping("/exceptionMethod")
    public String exceptionMethod(Model model) throws Exception {
        model.addAttribute("msg", "没有抛出异常");
        int num = 1 / 0;
        log.info(String.valueOf(num));
        return "index";
    }

    /**
     * 描述：捕获 ArithmeticException 异常
     * 
     * @param model 将Model对象注入到方法中
     * @param e     将产生异常对象注入到方法中
     * @return 指定错误页面
     */

    @ExceptionHandler(value = { ArithmeticException.class })
    public String arithmeticExceptionHandle(Model model, Exception e) {
        model.addAttribute("msg", "除数不能是0哦");
        model.addAttribute("msgg", "@ExceptionHandler" + e.getMessage() + "除数不能是0哦");
        System.out.println("****************************");
        System.out.println("****************************");
        System.out.println(e.getMessage());
        System.out.println("****************************");
        System.out.println("****************************");
        System.out.println(model.toString());
        log.info(e.getMessage());
        return "error";
    }
}

package com.tszr.exception;

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

@SpringBootApplication
public class ExceptionApplication {
    public static void main(String[] args) {
        SpringApplication.run(ExceptionApplication.class, args);
    }
}