Java实现Http请求参数对特殊字符的处理办法

转载自：http://blog.csdn.net/hellochenlian/article/details/38512781

java中URL 的编码和解码函数

java.net.URLEncoder.encode(String s)和java.net.URLDecoder.decode(String s);

在javascript 中URL 的编码和解码函数

escape(String s)和unescape(String s) ;

附上Java实例代码:

URLConnection版：

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;
import java.util.Map;

public class HttpRequest {
    /**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + URLEncoder.encode(param, "utf8");
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(URLEncoder.encode(param,"utf8"));
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }  
    public static void main(String[] args) {
        //发送 GET 请求
        String s=HttpRequest.sendGet("http://192.168.10.191:9000/CoreTrade/ajax/ajaxLoginMobileAction", "userNo=18107729226&password=2hXWD5JlN8FgdwaMN+7+Ug==");
        System.out.println(s);
        
        //发送POST 请求
        String s2=HttpRequest.sendPost("http://192.168.10.191:9000/CoreTrade/ajax/ajaxLoginMobileAction", "userNo=18107729226&password=2hXWD5JlN8FgdwaMN+7+Ug==");
        System.out.println(s2);
    }
}

HttpClient版本，需要导入HttpClient包，下载地址: http://hc.apache.org/downloads.cgi ：

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class HttpClientDemo {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		HttpClient client = new DefaultHttpClient();  
		String paramUrl = "http://localhost:9000/CoreTrade/ajax/ajaxLoginMobileAction"+"?";
		String params = "userNo=18107729226&password=";
		HttpGet get = null;
		try {
			get = new HttpGet(paramUrl+URLEncoder.encode(params+"2hXWD5JlN8FgdwaMN+7+Ug==", "utf8"));
		} catch (UnsupportedEncodingException e2) {
			// TODO Auto-generated catch block
			e2.printStackTrace();
		}  
		HttpResponse res = null;
		try {
			res = client.execute(get);
		} catch (ClientProtocolException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (IOException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}  
		System.out.println(res.getProtocolVersion());  
		System.out.println(res.getStatusLine().getStatusCode());  
		System.out.println(res.getStatusLine().getReasonPhrase());  
		System.out.println(res.getStatusLine().toString());  
		  
		Header[] headers = res.getAllHeaders();  
		for (Header header : headers) {  
		    System.out.println(header.getName() + ": " + header.getValue());  
		}  
		  
		if (res.getEntity() != null) {  
		    try {
				System.out.println(EntityUtils.toString(res.getEntity()));
			} catch (ParseException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}  
		}  
		try {
			EntityUtils.consume(res.getEntity());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}  
		  
		client.getConnectionManager().shutdown();  
	}

}