Java编程琐事(4)——Java类中调用Servlet

一、Java中调用servlet说明:

我们有时可能需要在Java类中调用Servlet从而实现某些特殊的功能,在JavaAPI中提供了一个URL的类,其中openStream( )方法可以打开URL的连接,并返回一个用于该连接读入的InputStream

二、Java中调用servlet应用举例:

package com.solid.test;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.MalformedURLException;

import java.net.URL;

public class TestCallServlet {

//servlet路径

private static final String path = "http://localhost:8080/test/servlet/TestServlet";

/**

* 测试调用servlet方法

* @param args

*/

public static void main(String[] args) {

try {

URL url = new URL(path);

url.openStream();

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

三、读取某个页面源代码的应用举例:

package com.solid.test;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;

public class TestReaderSource {

//URL路径

private static final String path = "http://www.google.cn";

//读取path路径下页面的源代码方法测试

public static void main(String[] args) {

BufferedReader br = null;

String source;

try {

URL url = new URL(path);

URLConnection conn = url.openConnection();

br = new BufferedReader(new InputStreamReader(conn.getInputStream()));

while((source=br.readLine())!=null) {

System.out.println(source);

}

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(br != null) {

br.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

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