Maven返回编译失败：包com.mashape.unirest.http不存在
我尝试使用Maven安装依赖项Unirest。我下载了.jar文件（ unirest-java-1.4.9.jar ）并将其添加到POM中，如下所示：
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.mashape.unirest</groupId>
<artifactId>unirest-java</artifactId>
<version>1.4.9</version>
</dependency>
</dependencies>
</dependencyManagement>
此外，我在Eclipse中添加了.jar：
现在Maven表示该软件包不存在。 Eclipse并没有说任何错误。 我做错了什么？ 开始时的警告是否有问题？
我的日志：
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.sap.cloud.sdk.sensorLive:sensorLive-application:war:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-jar-plugin is missing. @ com.sap.cloud.sdk.sensorLive:sensorLive:1.0-SNAPSHOT, C:\Users\c5283284\Documents\Projekte\Transformation module\sensorLive\pom.xml, line 52, column 21
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.sap.cloud.sdk.sensorLive:sensorLive-unit-tests:jar:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-jar-plugin is missing. @ com.sap.cloud.sdk.sensorLive:sensorLive:1.0-SNAPSHOT, C:\Users\c5283284\Documents\Projekte\Transformation module\sensorLive\pom.xml, line 52, column 21
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.sap.cloud.sdk.sensorLive:sensorLive-integration-tests:jar:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-jar-plugin is missing. @ com.sap.cloud.sdk.sensorLive:sensorLive:1.0-SNAPSHOT, C:\Users\c5283284\Documents\Projekte\Transformation module\sensorLive\pom.xml, line 52, column 21
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.sap.cloud.sdk.sensorLive:sensorLive:pom:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-jar-plugin is missing. @ line 52, column 21
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] sensorLive - Root [pom]
[INFO] sensorLive - Application [war]
[INFO] sensorLive - Unit Tests [jar]
[INFO] sensorLive - Integration Tests [jar]
[INFO]
[INFO] --------------< com.sap.cloud.sdk.sensorLive:sensorLive >---------------
[INFO] Building sensorLive - Root 1.0-SNAPSHOT [1/4]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M2:enforce (SAP S/4HANA Cloud SDK Project Structure Checks) @ sensorLive ---
[INFO]
[INFO] --------< com.sap.cloud.sdk.sensorLive:sensorLive-application >---------
[INFO] Building sensorLive - Application 1.0-SNAPSHOT [2/4]
[INFO] --------------------------------[ war ]---------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M2:enforce (SAP S/4HANA Cloud SDK Project Structure Checks) @ sensorLive-application ---
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ sensorLive-application ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ sensorLive-application ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 9 source files to C:\Users\c5283284\Documents\Projekte\Transformation module\sensorLive\application\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /C:/Users/c5283284/Documents/Projekte/Transformation module/sensorLive/application/src/main/java/com/sap/cloud/sdk/sensorLive/Servlet.java:[16,1] package com.mashape.unirest.http does not exist
[ERROR] /C:/Users/c5283284/Documents/Projekte/Transformation module/sensorLive/application/src/main/java/com/sap/cloud/sdk/sensorLive/Servlet.java:[17,32] package com.mashape.unirest.http does not exist
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for sensorLive - Root 1.0-SNAPSHOT:
[INFO]
[INFO] sensorLive - Root .................................. SUCCESS [ 0.485 s]
[INFO] sensorLive - Application ........................... FAILURE [ 2.233 s]
[INFO] sensorLive - Unit Tests ............................ SKIPPED
[INFO] sensorLive - Integration Tests ..................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.079 s
[INFO] Finished at: 2019-01-31T10:22:32+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project sensorLive-application: Compilation failure: Compilation failure:
[ERROR] /C:/Users/c5283284/Documents/Projekte/Transformation module/sensorLive/application/src/main/java/com/sap/cloud/sdk/sensorLive/Servlet.java:[16,1] package com.mashape.unirest.http does not exist
[ERROR] /C:/Users/c5283284/Documents/Projekte/Transformation module/sensorLive/application/src/main/java/com/sap/cloud/sdk/sensorLive/Servlet.java:[17,32] package com.mashape.unirest.http does not exist
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :sensorLive-application
我的POM：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<name>sensorLive - Root</name>
<description>sensorLive - Root</description>
<groupId>com.sap.cloud.sdk.sensorLive</groupId>
<artifactId>sensorLive</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.sap.cloud.s4hana</groupId>
<artifactId>sdk-bom</artifactId>
<version>2.9.1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.mashape.unirest</groupId>
<artifactId>unirest-java</artifactId>
<version>1.4.9</version>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<java.version>1.8</java.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
<maven.compiler.testSource>${java.version}</maven.compiler.testSource>
<maven.compiler.testTarget>${java.version}</maven.compiler.testTarget>
<project.build.resourceEncoding>UTF-8</project.build.resourceEncoding>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>
<modules>
<module>application</module>
<module>unit-tests</module>
<module>integration-tests</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.maventest.App</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.openejb.maven</groupId>
<artifactId>tomee-maven-plugin</artifactId>
<version>1.7.1</version>
<configuration>
<tomeeVersion>1.7.1</tomeeVersion>
<tomeeClassifier>plus</tomeeClassifier>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>3.0.0-M2</version>
<executions>
<execution>
<id>SAP S/4HANA Cloud SDK Project Structure Checks</id>
<goals>
<goal>enforce</goal>
</goals>
<configuration>
<rules>
<requireMavenVersion>
<version>3.3.9</version>
</requireMavenVersion>
<requireJavaVersion>
<version>${java.version}</version>
</requireJavaVersion>
<reactorModuleConvergence />
</rules>
<fail>true</fail>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
这就是我导入Unirest的方式：
import com.mashape.unirest.http.*;
2 个答案:
答案 0 :(得分：3)
您已将依赖项添加到pom的dependencyManagement部分。本节适用于多模块项目，其中可以在父pom中定义依赖项，但在子模块中使用依赖项。 Further reading。
要使用依赖项，必须打开子模块的pom（在这种情况下为application，unit-tests或integration-tests的pom），然后告诉maven您希望像这样使用依赖项：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
...
<groupId>com.sap.cloud.sdk.sensorLive</groupId>
<artifactId>application</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>com.mashape.unirest</groupId>
<artifactId>unirest-java</artifactId>
</dependency>
</dependencies>
...
</project>
答案 1 :(得分：2)
尝试从dependencyManagement标记中删除unirest-java依赖性，并像下面的示例一样添加依赖性标记
示例：
<dependencies>
<dependency>
<groupId>com.mashape.unirest</groupId>
<artifactId>unirest-java</artifactId>
<version>1.4.9</version>
</dependency>
</dependencies>
如果您使用的是Eclipse，只需进行一次Maven更新，即可解决问题。
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