HttpClient 4.0 post file and text

HttpClient 4.0 实例--简单工具类

一、基于Maven项目前期准备

    1、所需jar包，本人使用的Maven项目，其中Pom.xml内容如下所示

<dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpmime</artifactId>
      <version>4.3.4</version>
</dependency>

      其中4.3.4只是随意使用的一个版本(只要使用4.0以上版本即可)，其中所依赖的

    客户端代码：

package com.xxx.test;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class HttpClientText {

	/**
	 * HTTPCLIENT 4.0 POST 另外一种访问方式
	 */
	@SuppressWarnings({ "deprecation", "resource" })
	public static void postForm() {
		try {
			// 定义 httpclient链接
			HttpClient httpclient = new DefaultHttpClient();
			// Post 访问提交方式
			HttpPost httppost = new HttpPost("URL 地址");
			//HttpGet httpGet =  new HttpGet("URL 地址");
			
			// 设置请求参数信息request params信息 --- 参数集合信息
			List<NameValuePair> nvps = new ArrayList<NameValuePair>();
			nvps.add(new BasicNameValuePair("参数名", "参数值"));

			// 将参数赋值到请求参数实体信息 ---并使用指定参数的编码格式 对参数转码 转义
			httppost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
			// 发起会话请求获取访问结果
			HttpResponse response = httpclient.execute(httppost);
			//HttpResponse response = httpclient.execute(httpGet);
			
			// 读取请求返回结果 实体信息
			HttpEntity entity = response.getEntity();
			// 返回结果实体Body信息
			String body = EntityUtils.toString(entity);
			System.err.println(body);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * HTTPCLIENT 4.0 POST 带附件File请求
	 */
	@SuppressWarnings({ "deprecation", "resource" })
	public static void uploadFilePost() {
		try {
			// 定义 httpclient链接
			HttpClient httpclient = new DefaultHttpClient();
			// Post 访问提交方式
			HttpPost httppost = new HttpPost("URL 地址");
			// 设置请求超时时间
			httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 50000);
			// 设置读取超时时间
			httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 50000);

			// 设置请求参数信息request params信息 --- 参数生成器
			MultipartEntityBuilder build = MultipartEntityBuilder.create();
			// ContentType 指定参数编码格式、解析方式 包含多种格式 例如： "text/html",
			// Consts.ISO_8859_1 等
			build.addPart("appid:参数名称", new StringBody("参数值", ContentType.DEFAULT_TEXT));
			// 将文件流对象写入到请求request中
			build.addBinaryBody("imageFile:参数名", new File("附件地址"));

			// 将参数赋值到请求参数实体信息
			httppost.setEntity(build.build());
			// 发起会话请求获取访问结果
			HttpResponse response = httpclient.execute(httppost);
			// 读取请求返回结果 实体信息
			HttpEntity entity = response.getEntity();
			// 返回结果实体Body信息
			String body = EntityUtils.toString(entity);
			System.err.println(body);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

 

      基于SPRING MVC 实现的服务端代码，如下所示(仅给出包含File参数的服务端代码)：

  

@RequestMapping(value = "xxx/upload_file", method = RequestMethod.POST)
public String uploadFile(String appid, MultipartFile imageFile, Model model) {
     ......
}