通过网络得到html，并解析出其中网址(JAVA程序)

网络版程序：

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.URL;

import java.net.URLConnection;

import java.util.ArrayList;

import java.util.List;

public class TestIndex {

    private String rootUrl = "http://localhost/apk/";

    private String listUrl = rootUrl + "test-index.htm";

    private static List<String> imageUrlList = new ArrayList<String>();

    public static void main(String args[]){

        TestIndex ti = new TestIndex();

        ti.getData();

        System.out.println(imageUrlList.size());

        for(int i=0; i<imageUrlList.size();i++){

            System.out.println(imageUrlList.get(i));

        }

    }

    private InputStream getNetInputStream(String urlStr)

    {

        try

        {

            URL url = new URL(urlStr);

            URLConnection conn = url.openConnection();

            conn.connect();

            InputStream is = conn.getInputStream();

            return is;

        }

        catch (Exception e)

        {

        }

        return null;

    }

    private void getData() {

        try

        {

            InputStream is = getNetInputStream(listUrl);

            InputStreamReader isr = new InputStreamReader(is);

            BufferedReader br = new BufferedReader(isr);

            String s = null;

            String html="";

            while ((s = br.readLine()) != null)

            {

                html+=s;

            }

            is.close();

            String startStr = "src=\"https://";

            String endStr = " width=";

            int start = 0;

            int end = 0;

            int index =0;

            imageUrlList.clear();

            while (true)

            {

                start = html.indexOf(startStr, index);

                if (start < 0)

                    break;

                index=start;

                end = html.indexOf(endStr, index);

                String ss = html.substring(start+5,end-1);

                imageUrlList.add(ss);

                index +=ss.length();

            }

        }

        catch (Exception e)

        {

            // TODO: handle exception

        }

    }

}

本地版程序：

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

public class TestIndex_IO {

    private String rootUrl = "D:/Hixin/webandroid/";

    private String listUrl = rootUrl + "test-index.htm";

    private static List<String> imageUrlList = new ArrayList<String>();

    public static void main(String args[]){

        TestIndex_IO ti = new TestIndex_IO();

        ti.getData();

        System.out.println(imageUrlList.size());

        for(int i=0; i<imageUrlList.size();i++){

            System.out.println(imageUrlList.get(i));

        }

    }

    private InputStream getNetInputStream(String urlStr)

    {

            InputStream is;

            try {

                is = new FileInputStream(new File(urlStr));

                return is;

            } catch (FileNotFoundException e) {

                e.printStackTrace();

            }

            return null;

    }

    private void getData() {

        try

        {

            InputStream is = getNetInputStream(listUrl);

            InputStreamReader isr = new InputStreamReader(is);

            BufferedReader br = new BufferedReader(isr);

            String s = null;

            String html="";

            while ((s = br.readLine()) != null)

            {

                html+=s;

            }

            is.close();

            String startStr = "src=\"https://";

            String endStr = " width=";

            int start = 0;

            int end = 0;

            int index =0;

            imageUrlList.clear();

            while (true)

            {

                start = html.indexOf(startStr, index);

                if (start < 0)

                    break;

                index=start;

                end = html.indexOf(endStr, index);

                String ss = html.substring(start+5,end-1);

                imageUrlList.add(ss);

                index +=ss.length();

            }

        }

        catch (Exception e)

        {

            // TODO: handle exception

        }

    }

}

差别仅仅在于private InputStream getNetInputStream(String urlStr)函数。为避免中文乱码，建议InputStreamReader isr = new InputStreamReader(is,"utf-8");

            InputStream is = getNetInputStream(listUrl);

            InputStreamReader isr = new InputStreamReader(is);

            BufferedReader br = new BufferedReader(isr);

            String s = null;

            String html="";

            while ((s = br.readLine()) != null)

            {

                html+=s;

            }

            System.out.println(html.length());

            is.close();

输出结果为：77300

            InputStream is = getNetInputStream(listUrl);

            InputStreamReader isr = new InputStreamReader(is,"utf-8");

            BufferedReader br = new BufferedReader(isr);

            String s = null;

            String html="";

            while ((s = br.readLine()) != null)

            {

                html+=s;

            }

            System.out.println(html.length());

            is.close();

输出结果为：77135

 private String writeUrl = "D:/newfile/new/new";

  private String fileName ="test-index.htm";

 File f = new File(writeUrl);

            if(!f.exists()) {

                f.mkdirs();

            }

            File f1 = new File(f, fileName);

            FileOutputStream fos = new FileOutputStream(f1);

            OutputStreamWriter osw = new OutputStreamWriter(fos);  

           osw.write(html,0,html.length());

           osw.flush();

           osw.close();

解析出htm文件中包含的网址。

结果：

20

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcRvQgUjsVDBncM3mVIgIyIuE87BnlyJUy2BNsAp8kUoTanrC_css5mVAw

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcThd8cYjOTmCgYJZxX5ls-xpxaAlH1_yocOSCqI5_7OkL29SNtbCZ7q2Yoj

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTl-FzKmsppxuwzmTITGCv9uDxmrWr1pG0lw8mUD9wkWIloASxQeBEMnVjz

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQWbmiZJIXKHV2IoTBp7zSY6kD5g5VPzVtBTLJYYR5nwTtKi2-0_u93qL4e

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSlrLi_GtVgUehU7coFe1eMdrJxPdvS42iTqXkla0g75s31NBfAq2u1LE4

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSkrlyGxSs8Dr_7k3MUvoGq1vE45LgHZ0zEhIEdD9LLZiaoMcE7IAqn8ho

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTu__OUSJ4R4EKBu4jOi2ZAdHohpVQIBy3-SfnI8FYpN8wVC9kJG_aWuk_w

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcR3Bf7YtsHJ813A5_wWzpxIy4MbEmqz5NLw3qv1nPxOZqVjH7QlY-qYSCg

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcToB4nJPqVwnzn0xeasnXyhxGgOqHXdypE6KZIMTfV9k52eIrE3iYsA6Ixm

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcTkKw0LpqdB2eQMUpwdQdvM9DTeNtq1mrvMNivoQtN37p3m0OPsx4ME9i4O

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSZGzMf_3hmdDktz91yp5ZQi-eGWLCenZ0U446sXT2nqYuwlWRI_V_BVIWi

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTQF-55T5GM3dLdaoafPdlIYK0ESNvM6-Bsb4-B2rQTeyD5gGoCKxokExM-

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRoRjo4TFeXmx47zE6VH0ylcO0IQ2HBsOHYIMJCI9MsRyg_PF1WhHbqG76Q

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRrdegt1koEy51dLWrJAbVMJBlCEZ7fPl2mztYYM6onvxocRCq030Ft1gE

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcTtnQpte0uq9Ue9nsg25GeO1kw_-Hcn69ozTQkiMBHrXKwlANutyhwKD9XM

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRNRdxzmuFKABoGgyv2SC0gMticosL2LB3V1fBMOwNtVBZxHkyMw4IcWBFj

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQr40CEf75nWCj5dg-oeKtb9zK6mhktu7vnfoYAh5ioy34goC3c9ptDkQwP

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQUnyHrVEbppqhZnWnQrijhBFP0X34gRf7pKw6PdT4ggepB2k9g-p71sgGh

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcR9Us9qblbTJaw47gULXCI8sHKN4I61gYsT2ijebtZzgsMDI8GmYqQpIIw

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSIrW-IbBZjM9Ztn60r9QE1_FIMjt494qGX12tqsLsibYPLuFVwyVSgz1I

用正则表达式更简单：

 InputStream is = getNetInputStream(listUrl);

             InputStreamReader isr = new InputStreamReader(is);

             BufferedReader br = new BufferedReader(isr);

             String s = "";

             while ((s = br.readLine()) != null)

             {

                 Pattern p = Pattern.compile("src=\"https[^\"]+");

                 Matcher m = p.matcher(s);

                 while(m.find()) {

                     System.out.println(m.group());

                 }

             }

 src="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcRvQgUjsVDBncM3mVIgIyIuE87BnlyJUy2BNsAp8kUoTanrC_css5mVAw

 src="https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcThd8cYjOTmCgYJZxX5ls-xpxaAlH1_yocOSCqI5_7OkL29SNtbCZ7q2Yoj

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTl-FzKmsppxuwzmTITGCv9uDxmrWr1pG0lw8mUD9wkWIloASxQeBEMnVjz

 src="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQWbmiZJIXKHV2IoTBp7zSY6kD5g5VPzVtBTLJYYR5nwTtKi2-0_u93qL4e

 src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSlrLi_GtVgUehU7coFe1eMdrJxPdvS42iTqXkla0g75s31NBfAq2u1LE4

 src="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSkrlyGxSs8Dr_7k3MUvoGq1vE45LgHZ0zEhIEdD9LLZiaoMcE7IAqn8ho

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTu__OUSJ4R4EKBu4jOi2ZAdHohpVQIBy3-SfnI8FYpN8wVC9kJG_aWuk_w

 src="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcR3Bf7YtsHJ813A5_wWzpxIy4MbEmqz5NLw3qv1nPxOZqVjH7QlY-qYSCg

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcToB4nJPqVwnzn0xeasnXyhxGgOqHXdypE6KZIMTfV9k52eIrE3iYsA6Ixm

 src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcTkKw0LpqdB2eQMUpwdQdvM9DTeNtq1mrvMNivoQtN37p3m0OPsx4ME9i4O

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSZGzMf_3hmdDktz91yp5ZQi-eGWLCenZ0U446sXT2nqYuwlWRI_V_BVIWi

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTQF-55T5GM3dLdaoafPdlIYK0ESNvM6-Bsb4-B2rQTeyD5gGoCKxokExM-

 src="https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRoRjo4TFeXmx47zE6VH0ylcO0IQ2HBsOHYIMJCI9MsRyg_PF1WhHbqG76Q

 src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRrdegt1koEy51dLWrJAbVMJBlCEZ7fPl2mztYYM6onvxocRCq030Ft1gE

 src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcTtnQpte0uq9Ue9nsg25GeO1kw_-Hcn69ozTQkiMBHrXKwlANutyhwKD9XM

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRNRdxzmuFKABoGgyv2SC0gMticosL2LB3V1fBMOwNtVBZxHkyMw4IcWBFj

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQr40CEf75nWCj5dg-oeKtb9zK6mhktu7vnfoYAh5ioy34goC3c9ptDkQwP

 src="https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQUnyHrVEbppqhZnWnQrijhBFP0X34gRf7pKw6PdT4ggepB2k9g-p71sgGh

 src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcR9Us9qblbTJaw47gULXCI8sHKN4I61gYsT2ijebtZzgsMDI8GmYqQpIIw

 src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSIrW-IbBZjM9Ztn60r9QE1_FIMjt494qGX12tqsLsibYPLuFVwyVSgz1I

通过网络得到html，并解析出其中网址(JAVA程序)的更多相关文章

Java匹马行天下之 Java国出了个Java——举国欢庆
Java帝国的崛起前言: 看庭前花开花落,宠辱不惊, 望天上云卷云舒,去留无意. 闹心的事儿,选择释怀: 纠缠的人儿,试着放下, 生活其实很美. 心若向阳,就无惧悲伤. 愿你明朗坦荡纵情豁达,有得有 ...
Android网络请求与数据解析，使用Gson和GsonFormat解析复杂Json数据
版权声明:未经博主允许不得转载一:简介 [达叔有道]软件技术人员,时代作者,从 Android 到全栈之路,我相信你也可以!阅读他的文章,会上瘾!You and me, we are family ...
初探iOS网络开发，数据解析。
通过大众点评平台开发来简单了解一下,oc的网络编程和数据解析(json) 首先我们需要到大大众点评开发者平台申请一个key.http://developer.dianping.com/app/tech ...
Flutter网络请求和数据解析
一:前言 - 什么是反射机制,Flutter为什么禁用反射机制? 在Flutter中它的网络请求和数据解析稍微的比较麻烦一点,因为Flutter不支持反射机制.相信大家都看到这么一条,就是Flutte ...
Android okHttp网络请求之Json解析
前言: 前面两篇文章介绍了基于okHttp的post.get请求,以及文件的上传下载,今天主要介绍一下如何和Json解析一起使用?如何才能提高开发效率? okHttp相关文章地址: Android o ...
ZeroMQ接口函数之：zmq_z85_decode – 从一个用Z85算法生成的文本中解析出二进制密码
ZeroMQ 官方地址 :http://api.zeromq.org/4-0:zmq_z85_decode zmq_z85_decode(3) ØMQ Manual - ØMQ/4.1 ...
js中解析json对象：JSON.parse()用于从一个字符串中解析出json对象, JSON.stringify()用于从一个对象解析出字符串。
JSON.parse()用于从一个字符串中解析出json对象. var str = '{"name":"huangxiaojian","age&quo ...
GJM : Unity3D 常用网络框架与实战解析【笔记】
Unity常用网络框架与实战解析 1.Http协议 Http协议存在TCP 之上有时候 TLS\SSL 之上默认端口80 https 默认端口 ...
网络热恋之XML解析
XML 可扩展标记语言用于标记电子文件使其具有结构性的标记语言,可以用来标记数据.定义数据类型,是一种允许用户对自己的标记语言进行定义的源语言易读性高,编码手写难度小,数据量大 NSXMLPars ...

随机推荐

性能调优之MYSQL高并发优化
性能调优之MYSQL高并发优化一.数据库结构的设计如果不能设计一个合理的数据库模型,不仅会增加客户端和服务器段程序的编程和维护的难度,而且将会影响系统实际运行的性能.所以,在一个系统开始实施之 ...
Java并发编程：如何创建进程？
转载自:http://www.cnblogs.com/dolphin0520/p/3913517.html 在前面一篇文章中已经讲述了在进程和线程的由来,今天就来讲一下在Java中如何创建线程,让线程 ...
npm 配置和安装 express4.X 遇到的问题及解决
前言:懒得看前面两篇介绍的也可以从本节直接参考,但建议最好了解下,因为 4.X 的express 已经把命令行工具分离出来 (链接https://github.com/expressjs/genera ...
.elf格式内容
arm-linux-ld 可以将程序链接成我们arm平台下的可运行的程序以之前使用过的led程序为例: 首先: arm-linux-gcc -g -c led.S (-g是表示产生调试信息, -c是 ...
linux_cmd_list_0
一.文件 touch file # 创建空白文件 rm -rf 目录名 # 不提示删除非空目录(-r:递归删除 -f强制) dos2unix # windows文本转linux文本 unix2dos ...
MySQL关于Duplicate entry '1' for key 'PRIMARY'错误
今天复习MySQL遇到Duplicate entry '1' for key 'PRIMARY'错误. 原因是主键值为'1'的数据已经存在,主键是唯一的,不可重复.
Swift中枚举的总结以及使用
枚举定义了一组具有相关性的数据,是开发者可以再带吗中以一个安全的方式来使用这些值,以又助于提供代码的可读性. 在Swift中,枚举可以分成两种:任意类型的枚举和指定类型的枚举,结构如下: //任意类型 ...
Elasticsearch搜索之cross_fields分析
cross_fields类型采用了一种以词条为中心(Term-centric)的方法,这种方法和best_fields及most_fields采用的以字段为中心(Field-centric)的方法有很 ...
多个git账号的SSH配置
一般使用git都只需要维持一个默认的git账户就可以打天下了. 但如果自己确实需要多个git账号的需求的话,就有必要配置多个ssh key了. 首先为生成多个ssh key ssh-keygen -t ...
Java设计模式之（建造者模式）
建造者模式:是将一个复杂的对象的构建与它的表示分离,使得同样的构建过程可以创建不同的表示. 建造者模式通常包括下面几个角色: 1. builder:抽象建造者,给出一个抽象接口,以规范产品对象的各个组 ...

通过网络得到html，并解析出其中网址(JAVA程序)

通过网络得到html，并解析出其中网址(JAVA程序)的更多相关文章

随机推荐

热门专题