（图片来自网络配图）
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Vector;
/**
* Java HTTP请求对象 发送GET/POST请求工具类
*/
public class HttpRequester {
private String defaultContentEncoding;
public HttpRequester() {
this.defaultContentEncoding = Charset.defaultCharset().name();
}
/**
* 发送GET请求
*
* @param urlString URL地址
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendGet(String urlString) throws IOException {
return this.send(urlString, "GET", null, null);
}
/**
* 发送GET请求
*
* @param urlString URL地址
* @param params 参数集合
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException {
return this.send(urlString, "GET", params, null);
}
/**
* 发送GET请求
*
* @param urlString URL地址
* @param params 参数集合
* @param propertys 请求属性
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys)
throws IOException {
return this.send(urlString, "GET", params, propertys);
}
/**
* 发送POST请求
*
* @param urlString URL地址
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendPost(String urlString) throws IOException {
return this.send(urlString, "POST", null, null);
}
/**
* 发送POST请求
*
* @param urlString URL地址
* @param params 参数集合
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException {
return this.send(urlString, "POST", params, null);
}
/**
* 发送POST请求
*
* @param urlString URL地址
* @param params 参数集合
* @param propertys 请求属性
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys)
throws IOException {
return this.send(urlString, "POST", params, propertys);
}
/**
* 发送HTTP请求
*
* @param urlString 地址
* @param method get/post
* @param parameters 添加由键值对指定的请求参数
* @param propertys 添加由键值对指定的一般请求属性
* @return 响映对象
* @throws IOException
*/
private HttpRespons send(String urlString, String method, Map<String, String> parameters,
Map<String, String> propertys) throws IOException {
HttpURLConnection urlConnection = null;
if (method.equalsIgnoreCase("GET") && parameters != null) {
StringBuffer param = new StringBuffer();
int i = 0;
for (String key : parameters.keySet()) {
if (i == 0)
param.append("?");
else
param.append("&");
param.append(key).append("=").append(parameters.get(key));
i++;
}
urlString += param;
}
URL url = new URL(urlString);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod(method);
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setUseCaches(false);
if (propertys != null)
for (String key : propertys.keySet()) {
urlConnection.addRequestProperty(key, propertys.get(key));
}
if (method.equalsIgnoreCase("POST") && parameters != null) {
StringBuffer param = new StringBuffer();
for (String key : parameters.keySet()) {
param.append("&");
param.append(key).append("=").append(parameters.get(key));
}
urlConnection.getOutputStream().write(param.toString().getBytes());
urlConnection.getOutputStream().flush();
urlConnection.getOutputStream().close();
}
return this.makeContent(urlString, urlConnection);
}
/**
* 得到响应对象
*
* @param urlConnection
* @return 响应对象
* @throws IOException
*/
private HttpRespons makeContent(String urlString, HttpURLConnection urlConnection) throws IOException {
HttpRespons httpResponser = new HttpRespons();
try {
InputStream in = urlConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
httpResponser.contentCollection = new Vector<String>();
StringBuffer temp = new StringBuffer();
String line = bufferedReader.readLine();
while (line != null) {
httpResponser.contentCollection.add(line);
temp.append(line).append("\r\n");
line = bufferedReader.readLine();
}
bufferedReader.close();
String ecod = urlConnection.getContentEncoding();
if (ecod == null)
ecod = this.defaultContentEncoding;
httpResponser.urlString = urlString;
httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();
httpResponser.file = urlConnection.getURL().getFile();
httpResponser.host = urlConnection.getURL().getHost();
httpResponser.path = urlConnection.getURL().getPath();
httpResponser.port = urlConnection.getURL().getPort();
httpResponser.protocol = urlConnection.getURL().getProtocol();
httpResponser.query = urlConnection.getURL().getQuery();
httpResponser.ref = urlConnection.getURL().getRef();
httpResponser.userInfo = urlConnection.getURL().getUserInfo();
httpResponser.content = new String(temp.toString().getBytes(), ecod);
httpResponser.contentEncoding = ecod;
httpResponser.code = urlConnection.getResponseCode();
httpResponser.message = urlConnection.getResponseMessage();
httpResponser.contentType = urlConnection.getContentType();
httpResponser.method = urlConnection.getRequestMethod();
httpResponser.connectTimeout = urlConnection.getConnectTimeout();
httpResponser.readTimeout = urlConnection.getReadTimeout();
return httpResponser;
} catch (IOException e) {
throw e;
} finally {
if (urlConnection != null)
urlConnection.disconnect();
}
}
/**
* 默认的响应字符集
*/
public String getDefaultContentEncoding() {
return this.defaultContentEncoding;
}
/**
* 设置默认的响应字符集
*/
public void setDefaultContentEncoding(String defaultContentEncoding) {
this.defaultContentEncoding = defaultContentEncoding;
}
}
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