企业网站建设应注意什么/怎样制作一个网页

java如何通过url读取文件

很多朋友都不知道java如何通过url读取文件，下面小编为大家整理了java通过url读取文件内容，希望能帮到大家！

复制代码 代码如下:

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.IO;

using System.Net;

using System.Text;

using System.Text.RegularExpressions;

namespace eMeng.Exam

{

///

/// GetPageHtml 的摘要说明。

///

public class GetPageHtml : System.Web.UI.Page

{

protected System.Web.UI.WebControls.Button WebClientButton;

protected System.Web.UI.WebControls.Button WebRequestButton;

protected System.Web.UI.WebControls.TextBox ContentHtml;

protected System.Web.UI.WebControls.TextBox UrlText;

protected System.Web.UI.WebControls.Button GetText;

private string PageUrl = "";

private void Page_Load(object sender, System.EventArgs e)

{}

#region Web Form Designer generated code

override protected void OnInit(EventArgs e)

{

InitializeComponent();

base.OnInit(e);

}

///

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

///

private void InitializeComponent()

{

this.WebClientButton.Click += new System.EventHandler(this.WebClientButton_Click);

this.WebRequestButton.Click += new System.EventHandler(this.WebRequestButton_Click);

this.GetText.Click += new System.EventHandler(this.GetText_Click);

this.Load += new System.EventHandler(this.Page_Load);

}

#endregion

private void WebClientButton_Click(object sender, System.EventArgs e)

{

PageUrl = UrlText.Text;

WebClient wc = new WebClient();

wc.Credentials = CredentialCache.DefaultCredentials;

///方法一：

Byte[] pageData = wc.DownloadData(PageUrl);

ContentHtml.Text = Encoding.Default.GetString(pageData);

/// 方法二：

/// ***************代码开始**********

/// Stream resStream = wc.OpenRead(PageUrl);

/// StreamReader sr = new StreamReader(resStream,System.Text.Encoding.Default);

/// ContentHtml.Text = sr.ReadToEnd();

/// resStream.Close();

/// **************代码结束********

///

wc.Dispose();

}

private void WebRequestButton_Click(object sender, System.EventArgs e)

{

PageUrl = UrlText.Text;

WebRequest request = WebRequest.Create(PageUrl);

WebResponse response = request.GetResponse();

Stream resStream = response.GetResponseStream();

StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);

ContentHtml.Text = sr.ReadToEnd();

resStream.Close();

sr.Close();

}

private void GetText_Click(object sender, System.EventArgs e)

{

PageUrl = UrlText.Text;

WebRequest request = WebRequest.Create(PageUrl);

WebResponse response = request.GetResponse();

Stream resStream = response.GetResponseStream();

StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);

ContentHtml.Text = sr.ReadToEnd();

resStream.Close();

sr.Close();

ContentHtml.Text = Regex.Replace(ContentHtml.Text," ]*>", "");

//替换空格

ContentHtml.Text = Regex.Replace(ContentHtml.Text,"s+", " ");

}

}

复制代码 代码如下:

private void toolStripButton1_Click(object sender, EventArgs e)

{

string path = @"http://www.abc.com/0211155400.xml";

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(path);

req.Timeout = 10000;

HttpWebResponse rep = (HttpWebResponse)req.GetResponse();

using (StreamReader myFile = new StreamReader(rep.GetResponseStream()))

{

string myString = myFile.ReadToEnd();

}

}