HttpClient发送get\post请求，post带参数发送

HttpClient工具类

该工具类，可实现post带复杂参数请求/get请求。

注意点：内容中文传递可能会乱码，需要注意。可使用该语句设置格式。
method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,“utf-8”);

package wizrole_bg.core.common;


import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class HttpClientUtil {


	public static String httpReader(String url, String code){
		System.out.println("GetPage:"+url);
		
		HttpClient client = new HttpClient();
		GetMethod method = new GetMethod(url);	
		
		String result = null;
		try {
			client.executeMethod(method);
			int status = method.getStatusCode();
			if (status == HttpStatus.SC_OK) {
				result = method.getResponseBodyAsString();
			} else {
				System.out.println("Method failed: " + method.getStatusLine());
			}
		} catch (HttpException e) {
			// 发生致命的异常，可能是协议不对或者返回的内容有问题
			System.out.println("Please check your provided http address!");
			e.printStackTrace();
		} catch (IOException e) {
			// 发生网络异常
			System.out.println("发生网络异常！");
			e.printStackTrace();
		} finally{
			// 释放连接
			if(method!=null)method.releaseConnection();
			method = null;
			client = null;
		}
		return result;
	}
	
	public static String httpGet(String url,String code) {
		System.out.println("GetPage:"+url);
		String content = null;
		HttpClient httpClient = new HttpClient();
		//设置header
		httpClient.getParams().setParameter(HttpMethodParams.USER_AGENT,"Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:1.9.1.2) Gecko/20090803 Fedora/3.5.2-2.fc11 Firefox/3.5.2");
		GetMethod method = new GetMethod(url);
		try {
			int statusCode = httpClient.executeMethod(method);
			System.out.println("httpClientUtils::statusCode="+statusCode);
			System.out.println(method.getStatusLine());
			content = new String(method.getResponseBody(), code);
			
		} catch (Exception e) {
			System.out.println("time out");
			e.printStackTrace();
		} finally {
			if(method!=null)method.releaseConnection();
			method = null;
			httpClient = null;
		}
		return content;
	}
	
	public static String httpPost(String url, Map paramMap, String code) {
		System.out.println("GetPage:"+url);
		String content = null;
		if (url == null || url.trim().length() == 0 || paramMap == null
				|| paramMap.isEmpty())
			return null;
		HttpClient httpClient = new HttpClient();
		//设置header
		httpClient.getParams().setParameter(HttpMethodParams.USER_AGENT,"Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:1.9.1.2) Gecko/20090803 Fedora/3.5.2-2.fc11 Firefox/3.5.2");//



		//代理设置
		//httpClient.getHostConfiguration().setProxy("128.128.176.74", 808);
		
		PostMethod method = new PostMethod(url);
		Iterator it = paramMap.keySet().iterator();
		

		while (it.hasNext()) {
			String key = it.next() + "";
			Object o = paramMap.get(key);
			if (o != null && o instanceof String) {
				method.addParameter(new NameValuePair(key, o.toString()));
			}
			if (o != null && o instanceof String[]) {
				String[] s = (String[]) o;
				if (s != null)
					for (int i = 0; i < s.length; i++) {
						method.addParameter(new NameValuePair(key, s[i]));
					}
			}
		}
		try {
			method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"utf-8");
			int statusCode = httpClient.executeMethod(method);
			
			System.out.println("httpClientUtils::statusCode="+statusCode);

			System.out.println(method.getStatusLine());
			content = new String(method.getResponseBody(), code);
			
		} catch (Exception e) {
			System.out.println("time out");
			e.printStackTrace();
		} finally {
			if(method!=null)method.releaseConnection();
			method = null;
			httpClient = null;
		}
		return content;

	}

	public static String httpPost(String url, Map paramMap) {
		//编码：UTF-8
		return HttpClientUtil.httpPost(url, paramMap, "UTF-8");
	}

	/**
	 * 从网络Url中下载文件
	 * @param urlStr
	 * @param fileName
	 * @param savePath
	 * @throws IOException
	 */
	public static void  downLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException{
		URL url = new URL(urlStr);
		HttpURLConnection conn = (HttpURLConnection)url.openConnection();
		//设置超时间为3秒
		conn.setConnectTimeout(3*1000);
		//防止屏蔽程序抓取而返回403错误
		conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

		//得到输入流
		InputStream inputStream = conn.getInputStream();
		//获取自己数组
		byte[] getData = readInputStream(inputStream);

		//文件保存位置
		File saveDir = new File(savePath);
		if(!saveDir.exists()){
			saveDir.mkdir();
		}
		File file = new File(saveDir+File.separator+fileName);
		FileOutputStream fos = new FileOutputStream(file);
		fos.write(getData);
		if(fos!=null){
			fos.close();
		}
		if(inputStream!=null){
			inputStream.close();
		}


		System.out.println("info:"+url+" download success");

	}

	/**
	 * 从输入流中获取字节数组
	 * @param inputStream
	 * @return
	 * @throws IOException
	 */
	public static  byte[] readInputStream(InputStream inputStream) throws IOException {
		byte[] buffer = new byte[1024];
		int len = 0;
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		while((len = inputStream.read(buffer)) != -1) {
			bos.write(buffer, 0, len);
		}
		bos.close();
		return bos.toByteArray();
	}

	public static String httpPostGB2312(String url, Map paramMap) {
		return HttpClientUtil.httpPost(url, paramMap, "GB2312");
	}


	public static void main(String[] args) {
//		//整体参数map
//		Map paramMap = new HashMap();
//		//内容体
//		Map miniprogramMap = new HashMap();
//
//		miniprogramMap.put("msg1","王晨");
//		miniprogramMap.put("msg2",人民医院");
//		miniprogramMap.put("msg3","123456");
//		miniprogramMap.put("msg4","已通过");
//		miniprogramMap.put("msg5","申请成功");
//		String param = "{\"msg1\":\"王尘\",\"msg2\":\"人民医院\",\"msg3\":\"WY159376454243800070846\",\"msg4\":\"已通过\",\"msg5\":\"申请成功\"}";
//
//		paramMap.put("toOpenId","oiozyskpvsA8ILYE0OJQi2dcg");
//		paramMap.put("templateId","bntz");
//		paramMap.put("msgParam",param);
//		paramMap.put("toUrl","");
//
//		System.out.println("paramMap:"+paramMap);		
//		HttpClientUtil.httpPost("http://127.0.0.1:8096/BankServer/WXGetParams/sendTemplateMsg",paramMap,"UTF-8");
	}
}

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