springboot使用IDEA远程Debug

目录 1、先创建一个准备远程调试的Demo，注意构建项目的配置2、打包3、在IDEA配置远程Debug4、在终端启动刚才打好的jar包5、测试

项目上线之后，如果日志打印的很模糊或者业务逻辑比较复杂，有时候无法定位具体的错误原因，因此可以通过IDEA远程代理进行Debug。

线上的代码一定要和本地的一致！

环境：

2.1.4.RELEASE（org.springframework.boot） jdk1.8 Apache Maven 3.5.0 1、先创建一个准备远程调试的Demo，注意构建项目的配置

<?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>2.1.4.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.remote.test</groupId><artifactId>remote_test</artifactId><version>0.0.1-SNAPSHOT</version><name>remote_test</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</artifactId></dependency> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.junit.jupiter</groupId><artifactId>junit-jupiter-api</artifactId><version>RELEASE</version><scope>test</scope></dependency></dependencies> <build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-shade-plugin</artifactId><version>2.2</version><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>2.1.4.RELEASE</version></dependency></dependencies><configuration><keepDependenciesWithProvidedScope>true</keepDependenciesWithProvidedScope><createDependencyReducedPom>false</createDependencyReducedPom><filters><filter><artifact>*:*</artifact><excludes><exclude>META-INF/*.SF</exclude><exclude>META-INF/*.DSA</exclude><exclude>META-INF/*.RSA</exclude></excludes></filter></filters></configuration><executions><execution><phase>package</phase><goals><goal>shade</goal></goals><configuration><finalName>${project.artifactId}-${project.version}-all</finalName><transformers><transformer implementation='org.apache.maven.plugins.shade.resource.AppendingTransformer'><resource>META-INF/spring.handlers</resource></transformer><transformer implementation='org.springframework.boot.maven.PropertiesMergingResourceTransformer'><resource>META-INF/spring.factories</resource></transformer><transformer implementation='org.apache.maven.plugins.shade.resource.AppendingTransformer'><resource>META-INF/spring.schemas</resource></transformer><transformer implementation='org.apache.maven.plugins.shade.resource.ServicesResourceTransformer'/><transformer implementation='org.apache.maven.plugins.shade.resource.ManifestResourceTransformer'><!--根据项目的全名指定启动类--> <mainClass>com.remote.test.remote_test.RemoteTestApplication</mainClass></transformer></transformers></configuration></execution></executions></plugin></plugins></build></project>

package com.remote.test.remote_test; import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController; import java.util.HashMap;import java.util.Map; @RestController@RequestMapping('remote/test')public class UserController { private static final Logger logger = LoggerFactory.getLogger(UserController.class); @PostMapping('selectByUserId') public String selectUserInfo(@RequestParam('userId') String userId) {try { Map<String,Object> userInfo = new HashMap<>(); userInfo.put('userId',userId); userInfo.put('age',23); userInfo.put('name','yanshao'); userInfo.put('address','shanghai'); logger.info('Query user information by user ID. userInfo: {}',userInfo.toString()); return this.success(userInfo);} catch (Exception e) { logger.error('Query user information by user ID. userId:{} ', userId, e); return this.fail();} } private String success(Object data){Map<String,Object> res = new HashMap<>();res.put('code',0);res.put('desc','success');res.put('data',data);return res.toString(); } private String fail(){Map<String,Object> res = new HashMap<>();res.put('code',1);res.put('desc','fail');return res.toString(); } }2、打包

输入：mvn clean package，（大概需要等几分钟），最好在构建之前指定本地repository，就不需要重新下载jar包了。

3、在IDEA配置远程Debug

指定socket port = 8081，指定准备debug的模块

4、在终端启动刚才打好的jar包

a. 先在IDEA启动debug

b. 然后在终端输入命令：java -agentlib:jdwp=transport=dt_socket,server=n,address=localhost:8081 -jar remote_test-0.0.1-SNAPSHOT-all.jar

5、测试

在准备请求的接口上标记断点

注意：必须先在IDEA启动Debug，然后再启动项目

➜ Desktop java -agentlib:jdwp=transport=dt_socket,server=n,address=localhost:8081 -jar remote_test-0.0.1-SNAPSHOT-all.jarERROR: transport error 202: connect failed: Connection refusedERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [debugInit.c:750]

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