標籤：
研究了一天才搞清楚，其實挺簡單的，在這裡記錄下，以便以後參考。
一、建立一個servlet項目
主要包括（WEB-INF）裡面有classes檔案夾、lib檔案夾、web.xml檔案。
將寫好的servlet類編譯成的.class放到項目中的classes檔案夾下（我的是helloServlet.class）
1、在web.xml中配置
<?xml version="1.0" encoding="ISO-8859-1"?><web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>helloServlet</servlet-class><!-路徑加名稱，如果是在classes中的myclass中則用：myclass/helloServlet。如果是lib中的.jar包則用com.gis.arcgisengine.ServiceContext的形式-> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/hello</url-pattern><!-通過url訪問的別名，實際上就是對helloServlet.class的訪問，前面的/不能少-> </servlet-mapping> </web-app>
2、helloServlet檔案（是servlet類）
import java.io.IOException;import java.io.PrintWriter;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class helloServlet extends HttpServlet { private static final long serialVersionUID = 1L; public helloServlet() { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //overwrite String[] myName = null; response.setContentType("application/octet-stream"); try { ObjectInputStream ois = new ObjectInputStream(request.getInputStream()); Object obj = ois.readObject();//讀取輸入對象（傳過來的流對象） ois.close(); myName = (String[])obj; for(int i=0;i<myName.length;i++){ System.out.println(myName[i]); } } catch (Exception e) { e.printStackTrace(); } String name = request.getParameter("name"); ServletOutputStream out = response.getOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(out); oos.writeObject(name);//寫入輸出對象（返回給調用函數） oos.close(); out.close(); /*String name = request.getParameter("name"); if(name != null){ name = new String(name.getBytes("ISO-8859-1"),"GB2312"); }else{ name = "預設值"; } response.setContentType("text/html;charset=GB2312"); PrintWriter out = response.getWriter(); out.println("<HTML>"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println(" <BODY>"); out.println("<h1>"+name+":你好</h1>"); out.println(" </BODY>"); out.println("</HTML>"); System.out.println(name); out.flush(); out.close();*/ } public void init() throws ServletException { // Put your code here }}
二、建立普通項目並調用servlet項目中的helloServlet.class中的方法
1、項目中建立普通類
import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.net.HttpURLConnection;import java.net.URL;public class webtest { public static void myFun(){ try{ String[] arr = {"aaa","bbb","ccc","ddd"}; String tempGisEngineUrl = "http://sun:8080/helloapp/hello?name=中國";//hello是在servlet項目中web.xml中配置的url訪問別名。 URL imsServerURL = new URL(tempGisEngineUrl); HttpURLConnection imsConnection = (HttpURLConnection) imsServerURL .openConnection(); imsConnection.setDoInput(true); imsConnection.setDoOutput(true); imsConnection.setUseCaches(false); imsConnection.setDefaultUseCaches(false); imsConnection.setRequestProperty("Content-Type", "application/octet-stream"); ObjectOutputStream oos = new ObjectOutputStream(imsConnection .getOutputStream()); oos.writeObject(arr);//寫入輸出對象 oos.flush(); oos.close(); ObjectInputStream ois = new ObjectInputStream(imsConnection .getInputStream()); String oResult = (String)ois.readObject();//讀取輸入對象 ois.close(); imsConnection.disconnect(); System.out.println("from servlet:"+oResult);//將讀取到的輸入對象進行轉換後列印到後台 }catch(Exception ex){ System.out.println(ex.getMessage()); } } public static void main(String[] args){ myFun(); }}
三、運行結果：
1、在servlet端輸出：
aaa
bbb
ccc
ddd
2、在調用端輸出：from servlet:中國
java 通過HttpURLConnection與servlet通訊
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