httpclient 简单例子使用
帮同学搞的我也是醉了 啥需求晕死。。
package com.test.http;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
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.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
* 使用HttpClient模拟HTTP访问
* @see ===============================================================================================================================
* @see HttpClient代表了一个HTTP客户端,HttpClient接口中定义了大多数基本的HTTP请求执行行为
* @see HttpEntity是发送或接收消息的载体,它可以通过HttpResponse.getEntity()获取到
* @see HttpConnection代表了一个HTTP连接
* @see ===============================================================================================================================
*/
public class HttpClientUtil {
public static void main(String[] args)throws Exception{
JSONObject json = new JSONObject();
json.put("username", "yq1012");
json.put("password", "123456");
json.put("sss", "123456");
//参数可以任意加 ， 返回任意参数 json.put("xxx", "xxx");
// System.out.println(json.toString());
JSONObject jsonget=HttpClientUtil.getUrl("get", "http://html.javaweb.top", json, "/vote/testReciveMsg.php");
System.out.println(jsonget);
JSONObject jsonpost=HttpClientUtil.getUrl("post", "http://html.javaweb.top", json, "/vote/testReciveMsg.php");
System.out.println(jsonpost);
}
public static JSONObject getUrl(String method, String host,JSONObject json,String uri){
String requestUrl =host+uri;
JSONObject jsonobject= new JSONObject();
if("post".equals(method)){
List<NameValuePair> formParams= new ArrayList<NameValuePair>();
formParams.add(new BasicNameValuePair("json", ""+json.toString()));
System.out.println(json.toString());
/*Map map= new HashMap<String, String>();
map=HttpClientUtil.toMap(json);
Iterator it = map.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
Object key = entry.getKey();
Object value = entry.getValue();
// System.out.println("key=" + key + " value=" + value);
formParams.add(new BasicNameValuePair(""+key, ""+value));
}*/
jsonobject=sendPostRequest(requestUrl,formParams);
}else{
String param = json.toString().replace("\"", "%22")
.replace("{", "%7b").replace("}", "%7d"); //特殊字符进行转义
requestUrl+="?json="+param;
System.out.println(requestUrl);
/*Map map= new HashMap<String, String>();
map=HttpClientUtil.toMap(json);
Iterator it = map.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
Object key = entry.getKey();
Object value = entry.getValue();
// System.out.println("key=" + key + " value=" + value);
requestUrl+=key+"="+value;
requestUrl+="&";
}*/
jsonobject=sendGetRequest(requestUrl);
}
return jsonobject;
}
/**
* 发送GET请求
* @param requestUrl 请求的地址(含参数)
* @return 响应内容
*/
@SuppressWarnings("finally")
public static JSONObject sendGetRequest(String requestUrl) {
JSONObject json =new JSONObject();
long responseLength = 0; //响应长度
String responseContent = null; //响应内容
HttpClient httpClient = new DefaultHttpClient(); //创建默认的httpClient实例
HttpGet httpGet = new HttpGet(requestUrl); //创建HttpGet
try {
HttpResponse response = httpClient.execute(httpGet); //执行GET请求
HttpEntity entity = response.getEntity(); //获取响应实体
if (null != entity) {
responseLength = entity.getContentLength();
responseContent = EntityUtils.toString(entity, "UTF-8");
EntityUtils.consume(entity); //Consume response content
}
/* System.out.println("请求地址: " + httpGet.getURI());
System.out.println("响应状态: " + response.getStatusLine());
System.out.println("响应长度: " + responseLength);
System.out.println("响应内容: " + responseContent); */
json.put("address", httpGet.getURI().getSchemeSpecificPart());
json.put("code", response.getStatusLine().getStatusCode());
json.put("length", responseLength);
json.put("content", responseContent);
} catch (ClientProtocolException e) {
//该异常通常是协议错误导致
//比如构造HttpGet对象时传入的协议不对(将"http"写成"htp")或者服务器端返回的内容不符合HTTP协议要求等
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
//该异常通常是网络原因引起的,如HTTP服务器未启动等
e.printStackTrace();
} finally {
httpClient.getConnectionManager().shutdown(); //关闭连接，释放资源
return json;
}
}
/**
* 发送带有表单参数的POST请求
* @param requestUrl 请求的地址(不含参数)
* @return 响应内容
*/
@SuppressWarnings("finally")
public static JSONObject sendPostRequest(String requestUrl,List<NameValuePair> formParams) {
JSONObject json =new JSONObject();
long responseLength = 0; //响应长度
String responseContent = null; //响应内容
HttpClient httpClient = new DefaultHttpClient(); //创建默认的httpClient实例
HttpPost httpPost = new HttpPost(requestUrl); //创建HttpPost
try {
httpPost.setEntity(new UrlEncodedFormEntity(formParams, "UTF-8"));
HttpResponse response = httpClient.execute(httpPost); //执行POST请求
HttpEntity entity = response.getEntity(); //获取响应实体
if (null != entity) {
responseLength = entity.getContentLength();
responseContent = EntityUtils.toString(entity, "UTF-8");
EntityUtils.consume(entity); //Consume response content
}
json.put("address", httpPost.getURI().getSchemeSpecificPart());
json.put("code", response.getStatusLine().getStatusCode());
json.put("length", responseLength);
json.put("content", responseContent);
/* System.out.println("请求地址: " + httpPost.getURI());
System.out.println("响应状态: " + response.getStatusLine());
System.out.println("响应长度: " + responseLength);
System.out.println("响应内容: " + responseContent);*/
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
httpClient.getConnectionManager().shutdown(); //关闭连接，释放资源
return json;
}
}
/**
* 将Json对象转换成Map
*
* @param jsonObject
* json对象
* @return Map对象
* @throws JSONException
*/
public static Map toMap(JSONObject jsonObject) throws JSONException {
Map result = new HashMap();
Iterator iterator = jsonObject.keys();
String key = null;
String value = null;
while (iterator.hasNext()) {
key = (String) iterator.next();
value = jsonObject.getString(key);
result.put(key, value);
}
return result;
}
/**
* 根据 json json 的key 查询对应的value
* @param jsonObject
* @param key
* @return
* @throws JSONException
*/
public static Object toEqual(JSONObject jsonObject,String key) throws JSONException {
Object o=jsonObject.get(key);
return o;
}
}
