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整理Jsp生成html文件
发布:    2010-03-20     返回

最近在用jsp生成html文件,整理出三种方法,希望对大家有所帮助。

方法1:

为了减轻服务器压力,将原来的文章管理系统由JSP文件的从数据库中取数据显示改为由jsp生成静态html文件后直接访问html文件。下面是一个简单的示例

1.buildhtml.jsp

 

<%@ page contentType="text/html; charset=gb2312" import="java.util.*,java.io.*"%>

 

<%

try{

String title="jsp生成静态html文件";

String content="小样,还搞不定你?";

String editer="hpsoft";

String filePath = "";

filePath = request.getRealPath("/")+"template.htm";

out.print(filePath);

String templateContent="";

FileInputStream fileinputstream = new FileInputStream(filePath);//读取模块文件

int lenght = fileinputstream.available();

byte bytes[] = new byte[lenght];

fileinputstream.read(bytes);

fileinputstream.close();

templateContent = new String(bytes);

out.print(templateContent);

templateContent=templateContent.replaceAll("###title###",title);

templateContent=templateContent.replaceAll("###content###",content);

templateContent=templateContent.replaceAll("###author###",editer);

//替换掉模块中相应的方法

out.print(templateContent);

// 根据时间得文件名

Calendar calendar = Calendar.getInstance();

String fileame = String.valueOf(calendar.getTimeInMillis()) +".html";

fileame = request.getRealPath("/")+fileame;//生成的html文件保存路径

FileOutputStream fileoutputstream = new FileOutputStream(fileame);//建立文件输出流

byte tag_bytes[] = templateContent.getBytes();

fileoutputstream.write(tag_bytes);

fileoutputstream.close();

}

catch(Exception e){

out.print(e.toString());

}

 

%>

 

 

模板文件

 

2. template.htm

<html>

<head>

<title>###title###</title>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<LINK href="../css.css" rel=stylesheet type=text/css>

</head>

<body>

<table width="500" border="0" align="center" cellpadding="0" cellspacing="2">

<tr>

  <td align="center">###title###</td>

</tr>

<tr>

  <td align="center">作者:###author### </td>

</tr>

<tr>

  <td>###content###

</td>

</tr>

</table>

</body>

</html>

 

方法2:

<%@ page contentType="text/html; charset=gb2312"%>

<%

String[] flag = {"<$title$>","<$date$>","<$author$>","<$content$>"};

String title=request.getParameter("title");

String content=request.getParameter("content");

String editer="admin";

//Session.getAttribute("s_userName");

String filePath = "";

filePath = application.getRealPath("./adminroot/news.template");

String templateContent;

try{

templateContent = ReadTemplates.getTlpContent(filePath);

}catch(Exception e){

throw new Exception("模板信息读取失败。请联系系统管理员。");

}

templateContent = ReplaceAll.replace(templateContent,flag[0],title);

templateContent = ReplaceAll.replace(templateContent,flag[1],GetDate.getStringDate());

templateContent = Replac eAll.replace(templateContent,flag[2],editer);

templateContent = ReplaceAll.replace(templateContent,flag[3],content);

 

// 根据时间得文件名与路径名

 

Calendar calendar = Calendar.getInstance();

String fileName = String.valueOf(calendar.getTimeInMillis()) +".shtml";

String pathName = application.getRealPath("./news")+"\\"+ calendar.get(Calendar.YEAR) +

"\\"+ (calendar.get(Calendar.MONTH)+1) +"\\"+ calendar.get(Calendar.DAY_OF_MONTH)+"\\";

try{

WriteHtml.save(templateContent,pathName,fileName);

}catch(WriteFileException we){

throw new Exception("操作失败!");

}%>

import java.io.*;

 

public class WriteHtml {

 

 

  public WriteHtml() {

 

  }

 

  public static void save(String s, String s1, String s2)

 

 

  {

 

    try {

      a(s1);

      FileOutputStream fileoutputstream = new FileOutputStream(s1 + s2);

      byte abyte0[] = s.getBytes();

      fileoutputstream.write(abyte0);

      fileoutputstream.close();

    }

    catch (IOException e) {

      System.out.println( " write html error" +e.getMessage());

    }

  }

 

  private static void a(String s) {

 

    try {

      File file = new File(s);

      if (!file.exists())

        file.mkdirs();

    }

    catch (Exception e) {

      System.out.println( " mkdirs error!" +e.getMessage());

    }

  }

}

import java.io.*;

 public class  ReplaceAll

 {

  private static Object a = new Object();

  public ReplaceAll()

  {

  }

 

  public String replace(String content,String flag,String temp)

 

  {

   String str = null;

 

         try

 

         {

          //System.out.println(&quot;before-----&quot;+content);

          String s1 = content;

             str = s1.replaceAll(flag,temp);

            // System.out.println(&quot;replace after-----&quot;+str);

         }

         catch(Exception e)

         {

          System.out.println("replace all error:"+e.getMessage());

         }

         return str;

 

    ;  }

 

     private static void a(String s)

     {

         File file = new File(s);

         if(!file.exists())

             file.mkdirs();

     }

 }

 

import java.io.*;

 

 import java.util.*;

 

 public class ReadTemplates

 

 {

 

     private String temp = null;

 

     private Object a = new Object();

 

     public ReadTemplates()

 

     {

     }

 

     public String getTlpContent(String s)

 

 

     {

 

         if(temp == null)

             synchronized(a)

             {

                 if(temp == null)

                     try

                     {

                         System.out.println("----------------------------");

                         temp = a(s);

                         //System.out.println(&quot;test the temp&quot;+temp);

                     }

                     catch(Exception e)

                     {

                        System.out.println("get tlpconente error"+e.getMessage());

                     }

             }

         return temp;

     }

 

     private synchronized String a(String s)

 

 

     {

 

         String s1 = null;

         try

         {

             FileInputStream fileinputstream = new FileInputStream(s);

             int i = fileinputstream.available();

             byte abyte0[] = new byte[i];

             fileinputstream.read(abyte0);

             fileinputstream.close();

             s1 = new String(abyte0);

         }

         catch(IOException e)

         {

          System.out.println("ioexception error"+e.getMessage());

         }

         return s1;

     }

 

 }

 

<html>

<head>

<title>Untitled Document</title>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<LINK href="../css.css" rel=stylesheet type=text/css>

</head>

 

<body>

 

<table width="500" border="0" align="center" cellpadding="0" cellspacing="2">

<tr>

<td align="center"><$title$></td>

</tr>

<tr>

<td align="center">作者:<$author$>  发布时间:<font color=#ff0000><$date$></font></td>

</tr>

<tr>

<td><$content$>

</td>

 

</tr>

 

 

</table>

 

</body>

</html>

方法3:

package com.binghe.publish.database;

 

import java.io.*;

 

 

public class JspToHtml {

 

  private String temp = "";

  private Object a = new Object();

  public JspToHtml() {

  }

 

  public String readTemple(String filepath) {

 

 

    if (temp == null) {

 

      synchronized (a) {

        System.out.println("---------------");

        try {

          FileInputStream fileinputstream = new FileInputStream(filepath);

          int i = fileinputstream.available();

          byte byte0[] = new byte[i];

          fileinputstream.read(byte0);

          fileinputstream.close();

          temp = new String(byte0);

        }

        catch (FileNotFoundException ex) {

      &nb sp;   System.out.println("FileNotFoundException error" + ex.getMessage());

        }

        catch (IOException ex1) {

          System.out.println("IOException error" + ex1.getMessage());

        }

      }

 

    }

 

    return temp;

  }

 

  public String replaceAll(String content, String flag, String s) {

 

    String str = null;

    String s1 = content;

    try {

      str = s1.replaceAll(flag, s);

    }

    catch (Exception ex2) {

      System.out.println("Exception error" + ex2.getMessage());

    }

    return str;

  }

 

  public static void writeHtml(String content, String pathname, String filename) {

 

    File file = new File(pathname);

    if (!file.exists()) {

      file.mkdir();

    }

    try {

      FileOutputStream fileoutputstream = new FileOutputStream(pathname +

          filename);

      byte byte0[] = content.getBytes();

 

      fileoutputstream.close();

 

 

    }

 

    catch (FileNotFoundException ex) {

      System.out.println("FileNotFoundException error" + ex.getMessage());

    }

    catch (IOException ex1) {

      System.out.println("IOException error" + ex1.getMessage());

    }

 

  }

 

 

}

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域信息科技提供专业的jsp空间,虚拟JSP主机,jsp主机,独享TOMCAT,JSP服务器
域信息科技提供专业的jsp空间,虚拟JSP主机,jsp主机,独享TOMCAT,JSP服务器