java中的api有什么常用的接口 java 初学者最常用到的api有哪些？？
java\u5e38\u89c1\u7684API\u6709\u54ea\u4e9b\u6240\u6709\u7684\u8bfb\u64cd\u4f5c\u90fd\u7ee7\u627f\u81ea\u4e00\u4e2a\u516c\u5171\u8d85\u7c7bjava.io.InputStream\u7c7b\u3002 \u6240\u6709\u7684\u5199\u64cd\u4f5c\u90fd\u5e38\u89c1\u7684\u6709FileReader\uff0cFileWriter\uff1bBufferReader\uff0cBufferWriter\u7b49\uff0c\u67e5\u770bjdkapi\u6587\u6863\u5c31
java.lang.*;
java.util.*;
java.io.*;
给你两个方法吧：
public static String do_post(String url, List<NameValuePair> name_value_pair) throws IOException {
String body = "{}";
DefaultHttpClient httpclient = new DefaultHttpClient();
try {
HttpPost httpost = new HttpPost(url);
httpost.setEntity(new UrlEncodedFormEntity(name_value_pair, StandardCharsets.UTF_8));
HttpResponse response = httpclient.execute(httpost);
HttpEntity entity = response.getEntity();
body = EntityUtils.toString(entity);
} finally {
httpclient.getConnectionManager().shutdown();
}
return body;
}
public static String do_get(String url) throws ClientProtocolException, IOException {
String body = "{}";
DefaultHttpClient httpclient = new DefaultHttpClient();
try {
HttpGet httpget = new HttpGet(url);
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
body = EntityUtils.toString(entity);
} finally {
httpclient.getConnectionManager().shutdown();
}
return body;
}
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