使用Java实现上传文件至服务器的代码

你好！很高兴为你解答问题。以下是使用Java实现上传文件至服务器的代码示例：

import java.io.File;
import java.io.IOException;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.FileRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;

public class UploadUtil {
    
    /**
     * 上传文件至服务器
     * @param file 需要上传的文件
     * @param url 服务器接收文件的地址
     * @return 返回上传是否成功的标记
     */
    public static boolean uploadFile(File file, String url) {
        boolean success = false;
        PostMethod postMethod = new PostMethod(url);
        HttpClient client = new HttpClient();
        try {
            FileRequestEntity fileRequestEntity = new FileRequestEntity(file,"application/octet-stream");
            postMethod.setRequestEntity(fileRequestEntity);
            int statusCode = client.executeMethod(postMethod);
            if (statusCode == HttpStatus.SC_OK) {
                success = true;
                System.out.println("上传成功！");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            postMethod.releaseConnection();
        }
        return success;
    }

    /**
     * 示例
     * @param args
     */
    public static void main(String[] args) {
        File file = new File("/Users/test/test.txt"); // 需要上传到服务器的文件路径
        String url = "http://localhost:8080/test/upload"; // 服务器接收文件的地址
        uploadFile(file,url); // 上传文件至服务器
    }

}

希望能够帮助到你！如果有任何问题，欢迎继续向我提问。