HttpClient（五）-- 模拟表单上传文件

<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>

<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.5.2</version>
</dependency>

import java.io.File;
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class HttpClientUpload {

public static void main(String[] args) {
// 将 fileUrl 上传到 url中，上传成功后，返回 下载地址
String url = "http://127.0.0.1:8080/Joe/upload";
String fileUrl = "C:/abc.txt";
try {
System.out.println(post(url, "file", new File(fileUrl)));
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* post:(上传).
*
* @author Joe Date:2017年9月11日下午5:37:46
* @param serverUrl
* @param fileParamName
* @param file
* @return
* @throws ClientProtocolException
* @throws IOException
*/
public static String post(String serverUrl, String fileParamName, File file)
throws ClientProtocolException, IOException {
HttpPost httpPost = new HttpPost(serverUrl);
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
// 上传的文件
builder.addBinaryBody(fileParamName, file);
HttpEntity httpEntity = builder.build();
httpPost.setEntity(httpEntity);
// 请求获取数据的超时时间 、 设置从connect
// Manager获取Connection超时时间（因为目前版本是可以共享连接池的）、设置连接超时时间
RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(10000).setConnectionRequestTimeout(3000)
.setConnectTimeout(10000).build();
httpPost.setConfig(requestConfig);
HttpClient httpClient = HttpClients.createDefault();
HttpResponse response = httpClient.execute(httpPost);
return EntityUtils.toString(response.getEntity());
}
}