• Spring Boot Sample 016之spring-boot-error-exception


    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
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  • 原文地址:https://www.cnblogs.com/ouyushan/p/13064711.html
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