如何利用JAVA写一个简单的get或者post的接口？

2025-02-27 13:03:10

推荐回答（5个）

回答1：

WebService很简单，无论你想发布服务还是调取别人的服务。

回答2：

java中的servlet

回答3：

import java.io.IOException;

import javax.servlet.*;
import javax.servlet.http.*;

public class JavaServletSample extends HttpServlet {

    public void doGet(HttpServletRequest request, 
                      HttpServletResponse response) throws ServletException, IOException {
        // TODO       
    }

    public void doPost(HttpServletRequest request, 
                       HttpServletResponse response) throws ServletException, IOException {
        // TODO       
    }
}

最简单的一种。

回答4：

package com.huaye.network.util;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.util.EntityUtils;

public class HttpUtil {
/**
* http��ݣ�Ĭ�Ϸ��ص��ΪUTF-8��
*
* @param url
* url��ַ
* @param method
* �ύ��ʽ
* @return
* @throws IOException
*/
public static String getUrl(String url) throws IOException {

try {

HttpGet request = new HttpGet(url);
HttpClient httpClient = new DefaultHttpClient();

httpClient.getParams().setParameter(
CoreConnectionPNames.CONNECTION_TIMEOUT, 20000); // ��ʱʱ��
httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 20000); // ��ȡ��ʱ

HttpResponse response = httpClient.execute(request);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
String result = EntityUtils.toString(response.getEntity(), "utf-8");
//httpClient.getConnectionManager().releaseConnection(conn, validDuration, timeUnit)
return result;
} else {
return "kong";
}
} catch (Exception e) {
// TODO: handle exception
System.out.println(e);
e.printStackTrace();
return "kong";
}

}

/**
* post�ύ��
*
* @param url
* �ύ��ַ
* @param params
* ��
* @return
* @throws ClientProtocolException
* @throws IOException
*/
public static String postUrl(String url, Map params)
throws ClientProtocolException, IOException {
return postUrl(url, params, "UTF-8");
}

/**
* post�ύ��
*
* @param url
* �ύ��ַ
* @param params
* ��
* @param encoding
* ��
* @return
* @throws ClientProtocolException
* @throws IOException
*/
public static String postUrl(String url, Map params,
String encoding) throws ClientProtocolException, IOException {
List param = new ArrayList(); // ��
// param.add(new BasicNameValuePair("par", "request-post"));
// //��Ҳ�֪��ǲ��Ƿ�Ҫ��

// ��Ӳ��
Iterator> iterator = params.entrySet().iterator();
while (iterator.hasNext()) {
Entry entry = iterator.next();

param.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}

HttpPost request = new HttpPost(url);
HttpEntity entity = new UrlEncodedFormEntity(param, encoding);
request.setEntity(entity);

HttpClient client = new DefaultHttpClient();
client.getParams().setParameter(
CoreConnectionPNames.CONNECTION_TIMEOUT, 5000); // ��ʱʱ��
client.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 5000); // ��ȡ��ʱ

HttpResponse response = client.execute(request);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
return EntityUtils.toString(response.getEntity(), "utf-8");
} else {
return "null";
}
}
}

回答5：

你是想调用别人接口，还是接口被人调用？