jsp生成html - 我的Blog我做主^_^

jsp生成html

从网上找到了两种方法都是大同小异，经过我整理了一下。先将两种方法贴出来尊重原作者，向其致敬
1.作者：仓木泽
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,将相应的文件信息存入数据库中，然后直接访问html文件<这个问题我想了好久，我怎么就没有向这方面想呢，要不是别人提醒，恐怕我还要想一阵子，真的是气人呢，呵呵>。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地方
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>
2. 作者：xxx(不好意思给忘了)

<%@ 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 = ReplaceAll.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("before-----"+content);
          String s1 = content;
             str = s1.replaceAll(flag,temp);
            // System.out.println("replace after-----"+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("test the temp"+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>

</tr>

</table>
</body>
</html>
下面是我整理的方法：
1.我使用了已有大部分程序，但借用了pathfile字段，将得到的路径分类的保存到系统路径下。
我写了一个bean已实现这个功能：
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) {
          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());
    }

}

posted on 2007-01-31 18:31 java_蝈蝈阅读(264) 评论(0) 编辑收藏

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