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1. 使用maven构建SpringBoot的名叫spring-boot-exception3项目
2. pom.xml
<project xmlns=".0.0"xmlns:xsi=""xsi:schemaLocation=".0.0 .0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.bjbs</groupId><artifactId>spring-boot-exception3</artifactId><version>0.0.1-SNAPSHOT</version><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.13.RELEASE</version></parent><!-- 修改jdk版本 --><properties><java.version>1.8</java.version><!-- 指定thymeleaf和thymeleaf-layout-dialect高版本可以防止html标签不规范报错 --><thymeleaf.version>3.0.2.RELEASE</thymeleaf.version><thymeleaf-layout-dialect.version>2.0.4</thymeleaf-layout-dialect.version></properties><dependencies><!-- springBoot的启动器 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency></dependencies>
</project>3. 新建UserController.java
package com.bjbs.controller;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
public class UserController {@RequestMapping("/nullException")public String nullException(){String str = null;str.length();return "index";}
}4. 新建ShowController.java
package com.bjbs.controller;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
public class ShowController {@RequestMapping("/byZeroException") // java.lang.ArithmeticExceptionpublic String byZeroException(){int a = 10/0;return "index";}
}5. 新建GlobalException.java
package com.bjbs.exception;import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.servlet.ModelAndView;/*** 全局异常处理类*/
@ControllerAdvice
public class GlobalException {/*** java.lang.NullPointerException* 该方法需要返回一个ModelAndView: 目的是可以让我们封装异常信息以及视图的指定* 参数Exception e: 会将产生异常对象注入到方法中*/@ExceptionHandler(value={java.lang.NullPointerException.class})public ModelAndView nullPointerExceptionHandler(Exception e){ModelAndView mv = new ModelAndView();mv.addObject("error", "自定义空指针错误提示信息: " + e.toString());mv.setViewName("error");return mv;}/*** java.lang.ArithmeticException* 该方法需要返回一个ModelAndView: 目的是可以让我们封装异常信息以及视图的指定* 参数Exception e: 会将产生异常对象注入到方法中*/@ExceptionHandler(value={java.lang.ArithmeticException.class})public ModelAndView arithmeticExceptionHandler(Exception e){ModelAndView mv = new ModelAndView();mv.addObject("error", "自定义除以0错误提示信息: " + e.toString());mv.setViewName("error");return mv;}
}6. 新建App.java
package com.bjbs;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** springBoot启动类*/
@SpringBootApplication
public class App {public static void main(String[] args) {SpringApplication.run(App.class, args);}
}7. 在src/main/resources/templates下, 新建index.html
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>主页</title></head><body><span th:text="Hello"></span></body>
</html>8. 在src/main/resources/templates下, 新建error.html, 注意: 名称必须叫error。
<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>错误提示页面</title></head><body>出错了, 请与管理员联系。<span th:text="${error}"></span></body>
</html>9. 运行项目, 使用浏览器访问空指针异常
10. 运行项目, 使用浏览器访问除数为0异常
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