Question

我有问题。

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

public class qq {

        public static void main(String[] args) throws UnsupportedEncodingException, IOException {
        HttpClient httpclient = new DefaultHttpClient();
//        HttpPost httppost = new HttpPost("http://192.168.0.102/uploadtest/upload_photo");
        System.out.println("aaaa");

    }
}

文件manifest.mf：

Manifest-version: 1.0
Main-Class: qq

操作系统debian 8 java版本： java版“1.8.0_111” Java（TM）SE运行时环境（版本1.8.0_111-b14） Java HotSpot（TM）64位服务器VM（版本25.111-b14，混合模式）

和

javac -cp ./lib/httpclient-4.2.5.jar:./lib/httpcore-4.4.5.jar:./lib/httpmime-4.2.5.jar:./lib/commons-logging-1.2.jar qq.java
jar cfm test.jar manifest.mf qq.class

没问题，没有错误，退出代码 - 0。

我试试：

# java -jar test.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/impl/client/DefaultHttpClient
        at qq.main(qq.java:18)
Caused by: java.lang.ClassNotFoundException: org.apache.http.impl.client.DefaultHttpClient
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        ... 1 more

如何解决这个问题？

Answer 1

我建议您使用 Maven 或 Gradle ，因为系统会自动加载。\ / p>

<强>的Maven：

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.1</version>
</dependency>

<强>摇篮：

compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.1'

java和httpclient java.lang.NoClassDefFoundError

1 个答案: