Java新手，请教如何写一个接口
public interface IntStack {
public void push(int x);
public int pop();
public void show();
}
public class MyIntStack implements IntStack {
private int[] arrStack;
public MyIntStack(int length) {
arrStack = new int[length];
for( int i=0;ilength;i++ )
arrStack[i]=-1;
}
public void push(int x) {
System.out.println(x);
}
public int pop() {
System.out.println(“pop”);
}
public void show(){
System.out.println(“show”);
}
}
java如何写一个接口？
非常简单，基础语法：
public interface 接口名 {
常量定义;
抽象方法定义；
default 方法定义；
}
即使你在接口中不定义任何方法，也是可以的。
java如何创建一个简单的http接口？
1.修改web.xml文件
!– 模拟HTTP的调用，写的一个http接口 — servlet servlet-nameTestHTTPServer/servlet-name servlet-classcom.atoz.http.SmsHTTPServer/servlet-class /servlet servlet-mapping servlet-nameTestHTTPServer/servlet-name url-pattern/httpServer/url-pattern /servlet-mapping
2.新建SmsHTTPServer.java文件
package com.atoz.http;
import java.io.IOException; import java.io.PrintWriter;
import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
import com.atoz.action.order.SendSMSAction; import com.atoz.util.SpringContextUtil;
public class SmsHTTPServer extends HttpServlet { private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(“text/html;charset=utf-8”); request.setCharacterEncoding(“utf-8”); response.setCharacterEncoding(“utf-8”); PrintWriter out = response.getWriter(); String content = request.getParameter(“content”); //String content = new String(request.getParameter(“content”).getBytes(“iso-8859-1”), “utf-8”); String mobiles = request.getParameter(“mobiles”); String businesscode = request.getParameter(“businesscode”); String businesstype = request.getParameter(“businesstype”); if (content == null || “”.equals(content) || content.length() = 0) { System.out.println(“http call failed,参数content不能为空,程序退出”); } else if (mobiles == null || “”.equals(mobiles) || mobiles.length() = 0) { System.out.println(“http call failed,参数mobiles不能为空,程序退出”); } else { /*SendSMSServiceImpl send = new SendSMSServiceImpl();*/ SendSMSAction sendSms = (SendSMSAction) SpringContextUtil.getBean(“sendSMS”); sendSms.sendSms(content, mobiles, businesscode, businesstype); System.out.println(“—http call success—“); } out.close(); }
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); } }
3.调用http接口
String content = “测试”; content = URLEncoder.encode(content, “utf-8”); String url = “” + content + “mobiles=15301895007”; URL httpTest; try { httpTest = new URL(url); BufferedReader in; try { in = new BufferedReader(new InputStreamReader( httpTest.openStream())); String inputLine = null; String resultMsg = null; //得到返回信息的xml字符串 while ((inputLine = in.readLine()) != null) if(resultMsg != null){ resultMsg += inputLine; }else { resultMsg = inputLine; } in.close(); } catch (MalformedURLException e) { e.printStackTrace(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }
打字不易，望采纳，谢谢
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