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更直接一点吧，用jdk自带的urlconnection来实现，无需依赖其他库。下边的e68a84e8a2ad3231313335323631343130323136353331333361313962示例实现了post和get方法。

示例如下：

Java代码

public class HttpUtil {

public static final String CHARSET = "UTF-8";

public static String post(String url, Map postParams) {

HttpURLConnection con = null;

OutputStream osw = null;

InputStream ins = null;

try {

con = (HttpURLConnection) new URL(url).openConnection();

con.setDoInput(true);

con.setRequestMethod("POST");

con.setRequestProperty("Content-Type",

"application/x-www-form-urlencoded");

if (null != postParams) {

con.setDoOutput(true);

String postParam = encodeParameters(postParams);

byte[] bytes = postParam.getBytes(CHARSET);

con.setRequestProperty("Content-Length",

Integer.toString(bytes.length));

osw = con.getOutputStream();

osw.write(bytes);

osw.flush();

}

int resCode = con.getResponseCode();

if (resCode < 400) {

ins = con.getInputStream();

} else {

ins = con.getErrorStream();

}

return readContent(ins);

} catch (IOException e) {

} finally {

try {

if (osw != null) {

osw.close();

}

if (ins != null) {

ins.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}

return null;

}

public static String get(String url) {

HttpURLConnection con = null;

OutputStream osw = null;

InputStream ins = null;

try {

con = (HttpURLConnection) new URL(url).openConnection();

con.setRequestMethod("GET");

int resCode = con.getResponseCode();

if (resCode < 400) {

ins = con.getInputStream();

} else {

ins = con.getErrorStream();

}

return readContent(ins);

} catch (IOException e) {

} finally {

try {

if (osw != null) {

osw.close();

}

if (ins != null) {

ins.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}

return null;

}

private static final String readContent(InputStream ins) throws IOException {

StringBuilder sb = new StringBuilder();

BufferedReader br = new BufferedReader(new InputStreamReader(ins,

HttpUtil.CHARSET));

if (ins != null) {

String line;

while ((line = br.readLine()) != null) {

sb.append(line);

}

}

return sb.toString();

}

public static String encodeParameters(Map postParams) {

StringBuilder buf = new StringBuilder();

if (postParams != null && postParams.size() > 0) {

for (Map.Entry tmp : postParams.entrySet()) {

try {

buf.append(URLEncoder.encode(tmp.getKey(), CHARSET))

.append("=")

.append(URLEncoder.encode(tmp.getValue(), CHARSET))

.append("&");

} catch (java.io.UnsupportedEncodingException neverHappen) {

}

}

buf.deleteCharAt(buf.length() - 1);

}

return buf.toString();

}

}

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