如何使用JAVA接口传递参数

本篇内容介绍了"如何使用JAVA接口传递参数"的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

1，给接口传递json格式的数据

import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import net.sf.json.JSONObject;public class AppAddTest {    public static final String ADD_URL = "http://192.168.1.1:8080/*.controller/*.action";    public static void appadd() {        try {            URL url = new URL(ADD_URL);            HttpURLConnection connection = (HttpURLConnection) url                    .openConnection();            connection.setDoOutput(true);            connection.setDoInput(true);            connection.setRequestMethod("POST");            connection.setUseCaches(false);            connection.setInstanceFollowRedirects(true);            connection.setRequestProperty("connection", "Keep-Alive");            //connection.setRequestProperty("Content-Type", "text/plain; charset=utf-8");            connection.connect();            //POST请求            DataOutputStream out = new DataOutputStream(                    connection.getOutputStream());            JSONObject obj = new JSONObject();            String message = java.net.URLEncoder.encode("哈哈哈","utf-8");            obj.element("detail", "df");            obj.element("TEXT1", "asd");            obj.element("TEXT2", message);            out.writeBytes("data="+obj.toString());            System.out.println("data="+obj.toString());            out.flush();            out.close();            //读取响应            BufferedReader reader = new BufferedReader(new InputStreamReader(                    connection.getInputStream()));            String lines;            StringBuffer sb = new StringBuffer("");            while ((lines = reader.readLine()) != null) {                lines = new String(lines.getBytes(), "utf-8");                sb.append(lines);            }            System.out.println(sb);            reader.close();            connection.disconnect();        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }    public static void main(String[] args) {        appadd();    }}

2.从接口获取json格式数据

import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;import java.net.URLConnection;import java.sql.Timestamp;import java.util.concurrent.ConcurrentHashMap;import net.sf.json.JSONArray;import net.sf.json.JSONException;import net.sf.json.JSONObject;import org.springframework.web.HttpRequestHandler;public class JAVAURL {    /**     * @param args     */    public static void main(String[] args) {        String url = "http://192.168.1.1:8080/*.controller.do/*.action";           System.out.println("URL："+url);           StringBuffer json = new StringBuffer();            try {                //实例一个url和URLConnection                URL oracle = new URL(url);                //打开链接                URLConnection yc = oracle.openConnection();                //输入流作参数传进InputStreamReader并用BufferedReader接受                BufferedReader in = new BufferedReader(new InputStreamReader(                                            yc.getInputStream()));                String inputLine = null;                //一直读到空，并设置流编码是UTF8                while ( (inputLine = in.readLine()) != null) {                    json.append(new String(inputLine.getBytes(),"GBK"));                }                //记得关闭连接                in.close();            } catch (Exception e)  {                e.printStackTrace();            }        try {            JSONArray jn =  JSONArray.fromObject(json.toString());            if(jn.size()>0){            for (int i = 0; i < jn.size(); i++) {                JSONObject jo = (JSONObject) jn.get(i);                System.out.println(jo.get("id"));                System.out.println(jo.get("fdName"));            }            System.out.println(jn);            }            System.out.println("数据大小："+jn.size());        } catch (Exception e) {            e.printStackTrace();            System.out.println("连接超时！");        }    }}

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