Java 中使用 HttpClient 4.3.6 进行文件上传

代码部分

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.junit.Test;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class SimpleTest {
    @Test
    public void fileUpload() {
        String url = "http://site.com/api";
        CloseableHttpClient httpClient = HttpClients.createDefault();

       
        try {
            // 发送二进制数据(文件)
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            File f = new File("/Path/of/your/file");
            builder.addBinaryBody(
                    "file",
                    new FileInputStream(f),
                    ContentType.APPLICATION_OCTET_STREAM,
                    f.getName()
            );
            
            // 发送文本数据
            builder.addTextBody("field1",
                    "yes",
                    ContentType.TEXT_PLAIN
            );
            HttpEntity multipart = builder.build();

            
            HttpPost httpPost = new HttpPost(url);
            httpPost.setEntity(multipart);
            CloseableHttpResponse response = httpClient.execute(httpPost);
            System.out.println(EntityUtils.toString(response.getEntity()));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Maven 依赖

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.3.6</version>
    <scope>compile</scope>
</dependency>
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpmime</artifactId>
    <version>4.3.6</version>
    <scope>compile</scope>
</dependency>