spring boot: GlobalDefaultExceptionHandler方法內(nèi)的友好錯誤提示,全局異常捕獲

當你的某個控制器內(nèi)的某個方法報錯，基本上回顯示出java錯誤代碼，非常不友好，這個時候可以通過新建GlobalDefaultExceptionHandler.java文件,

1.加上@ControllerAdvice注解,?

2. 然后復(fù)寫defaultExceptionHandler方法，在方法上添加@ResponseBody輸出注解,?

? 以及@ExceptionHandler(Exception.class)注解，就能友好的已文字的信息顯示錯誤信息l

package com.muyang.boot22.config;import javax.servlet.http.HttpServletRequest;import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody;@ControllerAdvice public class GlobalDefaultExceptionHandler {@ExceptionHandler(Exception.class)@ResponseBodypublic String defaultExceptionHandler(HttpServletRequest req,Exception e){//是返回的String.//ModelAndView -- 介紹 模板引擎...? // ModelAndView mv = new ModelAndView(); // mv.setViewName(viewName);return "對不起，服務(wù)器繁忙，請稍后再試！";}}

　　

參考項目：

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pom.xml參考代碼

<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.9.RELEASE</version></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><java.version>1.8</java.version></properties><dependencies><!-- spring mvc,aop,restful,fastjson --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- jstl --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></dependency><!-- tomcat的支持 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><scope>provided</scope></dependency><dependency><groupId>org.apache.tomcat.embed</groupId><artifactId>tomcat-embed-jasper</artifactId><scope>provided</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency><!-- fastjson --> <dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.15</version></dependency><!-- 熱部署 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><optional>true</optional><scope>true</scope></dependency></dependencies><build><plugins><!-- 熱部署 --><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><!--fork : 如果沒有該項配置，呢個devtools不會起作用，即應(yīng)用不會restart --><fork>true</fork></configuration></plugin></plugins></build>

　　

?

App.java參考代碼

package com.muyang.boot22;import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.web.HttpMessageConverters; import org.springframework.context.annotation.Bean; import org.springframework.http.converter.HttpMessageConverter;import com.alibaba.fastjson.serializer.SerializerFeature; import com.alibaba.fastjson.support.config.FastJsonConfig; import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;/*** Hello world!**/ @SpringBootApplication public class App {//fastJson配置@Beanpublic HttpMessageConverters fastJsonHttpMessageConverters(){FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();FastJsonConfig fastJsonConfig = new FastJsonConfig();fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);fastConverter.setFastJsonConfig(fastJsonConfig);HttpMessageConverter<?> converter = fastConverter;return new HttpMessageConverters(converter);}public static void main( String[] args ){//System.out.println( "Hello World!" );SpringApplication.run(App.class, args);} }

　　

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HelloController.java樣例

package com.muyang.boot22.controller;import java.util.Map;import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping;@Controller public class HelloController {@RequestMapping("/hello")public void index(Map<String, Object>map){//map.put("name", "張三");//return "hello";int i = 1024/0;}}

　　

運行App.java

訪問?http://localhost:8080/hello時，報錯。能友好提示

?

轉(zhuǎn)載于:https://www.cnblogs.com/achengmu/p/9370904.html

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