Maven不能提取依赖关系

我有这个POM文件，它有一堆依赖关系。Maven不能提取依赖关系

<?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> 

    <groupId>com.mydevgeek</groupId> 
    <artifactId>rest-template-service</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 
    <packaging>jar</packaging> 

    <name>rest-template-service</name> 
    <description>Demo Rest Template Service</description> 

    <parent> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-parent</artifactId> 
     <version>1.5.3.RELEASE</version> 
     <relativePath /> <!-- lookup parent from repository --> 
    </parent> 

    <properties> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
     <java.version>1.8</java.version> 
    </properties> 

    <dependencies> 
     <dependency> 
      <groupId>org.apache.httpcomponents</groupId> 
      <artifactId>httpclient</artifactId> 
      <version>4.5</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-web</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-test</artifactId> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>com.fasterxml.jackson.core</groupId> 
      <artifactId>jackson-core</artifactId> 
      <version>2.8.7</version> 
     </dependency> 
     <dependency> 
      <groupId>com.fasterxml.jackson.core</groupId> 
      <artifactId>jackson-databind</artifactId> 
      <version>2.8.7</version> 
     </dependency> 
    </dependencies> 

    <build> 
     <plugins> 
      <plugin> 
       <groupId>org.springframework.boot</groupId> 
       <artifactId>spring-boot-maven-plugin</artifactId> 
      </plugin> 
     </plugins> 
    </build> 


</project>

在我的源代码，我有一类与一群进口

import com.fasterxml.jackson.databind.ObjectMapper; 
import org.apache.commons.httpclient.HttpClient; 
import org.apache.commons.httpclient.methods.PostMethod; 
import org.apache.commons.httpclient.methods.RequestEntity; 
import org.apache.commons.httpclient.methods.StringRequestEntity; 

import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.http.HttpEntity; 
import org.springframework.http.HttpHeaders;

出于某种原因，当我运行mvn干净安装，试图导入HttpClient的代码时，我得到的错误。所有其他进口工作正常。

package org.apache.commons.httpclient does not exist

我检查了我的.m2存储库，并在那里看到httpclient jar。我尝试删除它，并再次下载，以确保它没有损坏，这没有帮助。

对此提出建议？

来源

2017-06-19 user2254180

Onces删除.m2文件夹中的.jar重新下载它 –

Appache HttpClient v.4.5没有这样的包。

它采用org.apache.http.

所以，你应该改变你的进口报关单或使用图书馆的旧版本。

请参阅here如何迁移到新版本。

来源

2017-06-19 13:35:30

Maven不能提取依赖关系

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