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DefaultHttpClient使用
转自:http://username2.iteye.com/blog/1664995
- 博客分类:
- java
- 工具类
javaio
1 httpClient封装后使用,get和post方法
Java代码
- package util;
- import java.io.BufferedReader;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- import net.sf.json.JSONObject;
- 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.HttpPost;
- import org.apache.http.entity.StringEntity;
- import org.apache.http.impl.client.DefaultHttpClient;
- import org.apache.http.message.BasicNameValuePair;
- import org.apache.http.protocol.HTTP;
- /**
- * @Title:TestHttpClient
- * @Author Tony
- * @Date: 2014年6月21日 下午3:29:37
- * @Description: httpClient使用,1 发送post请求 2 发送get请求
- *
- */
- public class TestHttpClient {
- /**
- * @Title: methodPost
- * @Description: httpclient方法中post提交数据的使用
- * @param @return
- * @param @throws Exception
- * @return String
- * @throws
- */
- public static String methodPost() throws Exception {
- DefaultHttpClient httpclient = new DefaultHttpClient();
- // // 代理的设置
- // HttpHost proxy = new HttpHost("10.60.8.20", 8080);
- // httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
- // proxy);
- // 目标地址
- HttpPost httppost = new HttpPost(
- "http://localhost:8011/testServlet");
- System.out.println("请求: " + httppost.getRequestLine());
- // post 参数 传递
- List<BasicNameValuePair> nvps = new ArrayList<BasicNameValuePair>();
- nvps.add(new BasicNameValuePair("content", "11111111")); // 参数
- nvps.add(new BasicNameValuePair("path", "D:/file")); // 参数
- nvps.add(new BasicNameValuePair("name", "8")); // 参数
- nvps.add(new BasicNameValuePair("age", "9")); // 参数
- nvps.add(new BasicNameValuePair("username", "wzt")); // 参数
- httppost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8)); // 设置参数给Post
- // 执行
- HttpResponse response = httpclient.execute(httppost);
- HttpEntity entity = response.getEntity();
- System.out.println(response.getStatusLine());
- if (entity != null) {
- System.out.println("Response content length: "
- + entity.getContentLength());
- }
- // 显示结果
- BufferedReader reader = new BufferedReader(new InputStreamReader(
- entity.getContent(), "UTF-8"));
- String line = null;
- while ((line = reader.readLine()) != null) {
- System.out.println(line);
- }
- if (entity != null) {
- entity.consumeContent();
- }
- return null;
- }
- /**
- * @Title: methodGet
- * @Description: 以get方法提交数的使用
- * @param @return
- * @param @throws Exception
- * @return String
- * @throws
- */
- public static String methodGet() throws Exception {
- DefaultHttpClient httpclient = new DefaultHttpClient();
- // // 代理的设置
- // HttpHost proxy = new HttpHost("10.60.8.20", 8080);
- // httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
- // 目标地址
- HttpPost httpGet = new HttpPost("http://localhost:8011/testServlet");
- // 构造最简单的字符串数据
- StringEntity reqEntity = new StringEntity("name=test&password=test");
- // 设置类型
- reqEntity.setContentType("application/x-www-form-urlencoded");
- // 设置请求的数据
- httpGet.setEntity(reqEntity);
- // 执行
- HttpResponse response = httpclient.execute(httpGet);
- HttpEntity entity = response.getEntity();
- System.out.println(response.getStatusLine());
- if (entity != null) {
- System.out.println("Response content length: " + entity.getContentLength()); //得到返回数据的长度
- }
- // 显示结果
- BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"));
- String line = null;
- while ((line = reader.readLine()) != null) {
- System.out.println(line);
- }
- if (entity != null) {
- entity.consumeContent();
- }
- return null;
- }
- /**
- * 模拟url访问 从特定的url中获取json
- *
- * @param urlStr
- * @param params
- * @return json object ,or null if failed
- * 参数经过封装后传过来 ,提交为 post请求
- */
- private static JSONObject getJsonFromUrl(String urlStr,
- Map<String, String> params) {
- HttpClient httpClient = new DefaultHttpClient();
- HttpPost httpPost = new HttpPost(urlStr);
- JSONObject json = null;
- try {
- if (params != null) {
- Iterator<String> keys = params.keySet().iterator();
- List<NameValuePair> nvps = new ArrayList<NameValuePair>();
- while (keys.hasNext()) {
- String key = keys.next();
- nvps.add(new BasicNameValuePair(key, params.get(key)));
- }
- httpPost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
- }
- HttpResponse response = httpClient.execute(httpPost);
- HttpEntity entity = response.getEntity();
- InputStream is = entity.getContent();
- byte[] bytes = new byte[256];
- StringBuffer sb = new StringBuffer();
- while (is.read(bytes) > 0) {
- sb.append(new String(bytes));
- bytes = new byte[256];
- }
- json = JSONObject.fromObject(sb.toString());
- } catch (Exception e) {
- e.printStackTrace();
- }
- return json;
- }
- /**
- * @Title: main
- * @Description: 测试类
- * @param @param args
- * @return void
- * @throws
- */
- public static void main(String[] args) {
- try {
- TestHttpClient.methodGet();
- // TestHttpClient.methodPost();
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
2 后台接受数据的servlet
Java代码
- public class TestServlet extends HttpServlet {
- private static final long serialVersionUID = 1L;
- /**
- * @see HttpServlet#service(HttpServletRequest request, HttpServletResponse response)
- */
- protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- request.setCharacterEncoding( "utf-8");
- response.setContentType("text/html;charset=utf-8");
- response.setCharacterEncoding("utf-8");
- String name = request.getParameter("name");
- System.out.println("name 变量数据: "+name);
- }
- }
- httpClient使用jar.rar (873.8 KB)
- 下载次数: 418
- json-lib-2.4-jdk15.zip (142.3 KB)
- 下载次数: 32
DefaultHttpClient使用
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