Java模拟发送HTTP请求

2015-10-26 14:15:00
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摘要:Java模拟发送HTTP请求
package tk.xdatk.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.List;
/**
 * Created by XdaTk on 2014/12/21.
 * <p/>
 * HTTP请求工具类
 */
public class HTTPSend {
    /**
     * 发送get请求
     *
     * @param url  请求地址
     * @param list 请求参数
     * @return 请求结果
     *
     * @throws IOException
     */
    public static String sendGet(String url, List<HTTPParam> list) throws IOException {
        StringBuffer buffer = new StringBuffer(); //用来拼接参数
        StringBuffer result = new StringBuffer(); //用来接受返回值
        URL httpUrl = null; //HTTP URL类 用这个类来创建连接
        URLConnection connection = null; //创建的http连接
        BufferedReader bufferedReader = null; //接受连接受的参数
        //如果存在参数,我们才需要拼接参数 类似于 localhost/index.html?a=a&b=b
       if (list!=null && list.size() > 0) {
           for (int i = 0; i < list.size(); i++) {
               buffer.append(list.get(i).getKey()).append("=").append(URLEncoder.encode(list.get(i).getValue(), "utf-8"));
               //如果不是最后一个参数,不需要添加&
               if ((i + 1) < list.size()) {
                   buffer.append("&");
               }
           }
           url = url + "?" + buffer.toString();
       }
        //创建URL
        httpUrl = new URL(url);
        //建立连接
        connection = httpUrl.openConnection();
        connection.setRequestProperty("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        connection.setRequestProperty("connection", "keep-alive");
        connection.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0");
        connection.connect();
        //接受连接返回参数
        bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;
        while ((line = bufferedReader.readLine()) != null) {
            result.append(line);
        }
        bufferedReader.close();
        return result.toString();
    }
    /**
     * 发送Post请求
     *
     * @param url  请求地址
     * @param list 请求参数
     *
     * @return 请求结果
     *
     * @throws IOException
     */
    public static String sendPost(String url, List<HTTPParam> list) throws IOException {
        StringBuffer buffer = new StringBuffer(); //用来拼接参数
        StringBuffer result = new StringBuffer(); //用来接受返回值
        URL httpUrl = null; //HTTP URL类 用这个类来创建连接
        URLConnection connection = null; //创建的http连接
        PrintWriter printWriter = null;
        BufferedReader bufferedReader; //接受连接受的参数
        //创建URL
        httpUrl = new URL(url);
        //建立连接
        connection = httpUrl.openConnection();
        connection.setRequestProperty("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        connection.setRequestProperty("connection", "keep-alive");
        connection.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0");
        connection.setDoOutput(true);
        connection.setDoInput(true);
        printWriter = new PrintWriter(connection.getOutputStream());
        if (list!=null && list.size() > 0) {
            for (int i = 0; i < list.size(); i++) {
                buffer.append(list.get(i).getKey()).append("=").append(URLEncoder.encode(list.get(i).getValue(), "utf-8"));
                //如果不是最后一个参数,不需要添加&
                if ((i + 1) < list.size()) {
                    buffer.append("&");
                }
            }
        }
        printWriter.print(buffer.toString());
        printWriter.flush();
        connection.connect();
        //接受连接返回参数
        bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;
        while ((line = bufferedReader.readLine()) != null) {
            result.append(line);
        }
        bufferedReader.close();
        return result.toString();
    }
}
package tk.xdatk.util;
public class HTTPParam {
    //请求参数
    private String key;
    //参数值
    private String value;
    public HTTPParam() {
    }
    public HTTPParam(String key, String value) {
        this.key = key;
        this.value = value;
    }
    public String getKey() {
        return key;
    }
    public void setKey(String key) {
        this.key = key;
    }
    public String getValue() {
        return value;
    }
    public void setValue(String value) {
        this.value = value;
    }
}
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