Java使用HTTP的get方法读取网络数据、使用post方法与网络交互通信

来源：互联网发布：软件项目管理教程编辑：程序博客网时间：2024/06/10 15:06

1.Java使用HTTP的get方法读取网络数据

package peixun;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;public class TestGet {    public static void main(String[] args) {        new ReadByGet().start();    }    static class ReadByGet extends Thread {        @Override        public void run() {            try {                URL url = new URL("http://fanyi.youdao.com/openapi.do?keyfrom=yyxiaozhan&key=1696230822&type=data&doctype=xml&version=1.1&q=welcome");                //使用方法打开链接,并使用connection接受返回值                URLConnection connection = url.openConnection();                //获取connection输入流,并用is接受返回值                InputStream is = connection.getInputStream();                //将字节流向字符流的转换                InputStreamReader isr = new InputStreamReader(is);                BufferedReader br = new BufferedReader(isr);                String line;                /**                 * StringBuilder和StringBuffer不同的地方在于 StringBuffer是线程安全的                 * 单线程、不需要线程安全的情况下，处于性能的考虑，优先选择StringBuilder                 */                StringBuilder builder = new StringBuilder();                while ((line = br.readLine())!= null) {                    builder.append(line);                }                br.close();                isr.close();                is.close();                System.out.println(builder.toString());            } catch (MalformedURLException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

2.Java使用HTTP的post方法与网络交互通信

package peixun;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class TestPost {    public static void main(String[] args) {        new ReadByPost().start();    }}class ReadByPost extends Thread{    @Override    public void run() {        try {            URL url = new URL("http://fanyi.youdao.com/openapi.do");            HttpURLConnection connection =  (HttpURLConnection) url.openConnection();            connection.addRequestProperty("encoding", "UTF-8");            //设置为true，connection就可以从网络获取数据            connection.setDoInput(true);            //设置为true，connection就可以向网络传送数据            connection.setDoOutput(true);            //把访问方式换成post方式            /**             * 使用方法时候要先发送数据，所以OutputStream放在InputStream前面             */            connection.setRequestMethod("POST");            //connection建立链接之后，要获取输入流和输出流            OutputStream os = connection.getOutputStream();            OutputStreamWriter osw = new OutputStreamWriter(os);            BufferedWriter bw = new BufferedWriter(osw);             bw.write("keyfrom=yyxiaozhan&key=1696230822&type=data&doctype=xml&version=1.1&q=welcome");            bw.flush();            //connection建立链接之后，要获取输入流和输出流            InputStream  is = connection.getInputStream();            InputStreamReader isr = new InputStreamReader(is);            BufferedReader br = new BufferedReader(isr);            //进行读取操作            String line;            StringBuilder builder = new StringBuilder();            while ((line = br.readLine())!=null) {//br.readline先赋值给line，然后判断line是否为空。                builder.append(line);            }            bw.close();            osw.close();            os.close();            br.close();            isr.close();            is.close();            System.out.println(builder.toString());        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

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