一、环境
- Idea 2020.1
- JDK 1.8
- maven
二、目的
spring boot 统一异常处理实现。
三、步骤
3.1、点击File -> New Project -> Spring Initializer，点击next
3.2、在对应地方修改自己的项目信息
3.3、选择Web依赖，选中Spring Web。可以选择Spring Boot版本，本次默认为2.2.6，点击Next
3.4、项目结构
四、添加文件
pom.xml文件
<?xml version="1.0" encoding="UTF-8"?> <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> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>org.ouyushan</groupId> <artifactId>spring-boot-error-exception</artifactId> <version>0.0.1-SNAPSHOT</version> <name>spring-boot-error-exception</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>jquery</artifactId> <version>3.5.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
添加index.ftl
<!DOCTYPE html> <html> <head lang="en"> <title>Spring Boot Demo - FreeMarker</title> <link href="/css/index.css" rel="stylesheet" /> </head> <body> <div style="text-align: center;"> <img src="/images/springboot.jpg" /> <h1 id="title">${title}</h1> </div> <script type="text/javascript" src="/webjars/jquery/3.5.0/jquery.min.js"></script> <script> $(function(){ $('#title').click(function(){ alert('点击了'); }); }) </script> </body> </html>
500.ftl
<!DOCTYPE html> <html> <head lang="en"> <title>Spring Boot Demo - FreeMarker</title> </head> <body> <h1>500-${exception}</h1> <h1>${author}</h1> </body> </html>
添加index.css
h1{color: blue;}
配置文件application.properties
spring.freemarker.template-loader-path=classpath:/templates
spring.freemarker.suffix=.ftl
UserController.java
package org.ouyushan.springboot.error.exception.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; /** * @Description: * @Author: ouyushan * @Email: ouyushan@hotmail.com * @Date: 2020/5/7 14:41 */ @Controller @RequestMapping("/user") public class UserController { @RequestMapping("/index") public String index(ModelMap map){ map.put("title", "freemarker hello word"); return "index"; // 开头不要加上/，linux下面会出错 } @RequestMapping(value = "/runtimeException") public String runtimeException(ModelMap map) { throw new RuntimeException("测试异常"); } @RequestMapping(value = "/error") public String error(ModelMap map) throws Exception { throw new Exception("测试错误"); } }
ErrorExceptionHandler.java
package org.ouyushan.springboot.error.exception.handler; /** * @Description: * @Author: ouyushan * @Email: ouyushan@hotmail.com * @Date: 2020/5/7 14:44 */ import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.format.datetime.DateFormatter; import org.springframework.http.HttpStatus; import org.springframework.ui.Model; import org.springframework.ui.ModelMap; import org.springframework.web.bind.WebDataBinder; import org.springframework.web.bind.annotation.*; import org.springframework.web.servlet.ModelAndView; /** * 异常处理 */ @ControllerAdvice public class ErrorExceptionHandler { private static final Logger logger = LoggerFactory.getLogger(ErrorExceptionHandler.class); /** * 应用到所有@RequestMapping注解方法，在其执行之前初始化数据绑定器 * @param binder */ @InitBinder public void initBinder(WebDataBinder binder) { binder.addCustomFormatter(new DateFormatter("yyyy-MM-dd")); } /** * 把值绑定到Model中，使全局@RequestMapping可以获取到该值 * @param model */ @ModelAttribute public void addAttributes(Model model) { model.addAttribute("author", "ouyushan"); } /** * 统一异常处理 * * @param exception * * @return */ @ExceptionHandler(RuntimeException.class) @ResponseStatus(HttpStatus.OK) public ModelAndView processException(RuntimeException exception) { logger.info("自定义异常处理-RuntimeException"); ModelAndView m = new ModelAndView(); logger.info("--------------------" + exception.getMessage()); m.addObject("author", "ouyushan"); m.addObject("exception", "runtimeException"); m.setViewName("error/500"); return m; } /** * 统一异常处理 * * @param exception * * @return */ @ExceptionHandler(Exception.class) @ResponseStatus(HttpStatus.OK) public ModelAndView processException(Exception exception) { logger.info("自定义异常处理-Exception"); ModelAndView m = new ModelAndView(); logger.info("--------------------" + exception.getMessage()); m.addObject("author", "ouyushan"); m.addObject("exception", "exception"); m.setViewName("error/500"); return m; } }
五、测试
请求：
返回：
500-exception
ouyushan请求：
返回：
500-runtimeException
ouyushan