JAVA URL 操作使用工具类

import java.io.IOException;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;

//操作从URL中获取网络资源的类
public class Url {
    public static void getImageResourcByURL(String imagesFile)
            throws IOException {// 获取URL指定的资源
        URL url = new URL(imagesFile);
        Object obj = url.getContent();// 获得此URL的内容
        System.out.println(obj.getClass().getName());// 显示名称
    }

    public static void getHtmlResourceByURL(String htmlFile) throws IOException {// 获取URL指定的资源
        URL url = new URL(htmlFile);
        URLConnection uc = url.openConnection();// 创建远程对象连接对象
        InputStream in = uc.getInputStream();// 打开的连接读取的输入流
        int c;
        while ((c = in.read()) != -1) {// 循环读取资源信息
            System.out.print((char) c);
        }
        System.out.println();
        in.close();
    }

    public static void getHTMLResource(String htmlFile) throws IOException {// 读取URL指定的网页内容
        URL url = new URL(htmlFile);// 创建URL对象
        Reader reader = new InputStreamReader(new BufferedInputStream(
                url.openStream()));// 打开URL连接创建一个读对象
        int c;
        while ((c = reader.read()) != -1) {// 循环读取资源信息
            System.out.print((char) c);
        }
        System.out.println();
        reader.close();
    }

    public static void getResourceOfHTML(String htmlFile) throws IOException {// 读取URL指定的网页内容
        URL url = new URL(htmlFile);
        InputStream in = url.openStream();// 打开URL连接创建输入流
        int c;
        while ((c = in.read()) != -1) {// 循环读取资源信息
            System.out.print((char) c);
        }
        System.out.println();
        in.close();
    }

    public static void supportURLType(String host, String file) {// Java所支持的URL类型
        String[] schemes = { "http", "https", "ftp", "mailto", "telnet",
                "file", "ldap", "gopher", "jdbc", "rmi", "jndi", "jar", "doc",
                "netdoc", "nfs", "verbatim", "finger", "daytime",
                "systemresource" };// 创建URL类型数组
        for (int i = 0; i < schemes.length; i++) {// 循环遍历数组判断是否是java支持的URL类型
            try {
                URL u = new URL(schemes[i], host, file);
                System.out.println(schemes[i] + "是java所支持的URL类型\r\n");
            } catch (Exception ex) {
                System.out.println(schemes[i] + "不是java所支持的URL类型\r\n");
            }
        }
    }

    public static void main(String[] args) throws IOException {
        // java程序主入口处
        String imageFile = "http://www.baidu.com/001.jpg";
        String htmlFile = "http://www.baidu.com/";
        String host = "http://www.baidu.com";
        String file = "";
        System.out.println("1.//获取URL指定的图像资源信息");
        getImageResourcByURL(imageFile);
        System.out.println("2.获取URL指定的HTML网页资源信息");
        getHtmlResourceByURL(htmlFile);
        System.out.println("3.根据URL创建读对象读取网页内容");
        getHTMLResource(htmlFile);
        System.out.println("4.根据URL创建输入流读取网页内容");
        getResourceOfHTML(htmlFile);
        System.out.println("5.判断Java所支持的URL类型 ");
        supportURLType(host, file);
    }
}