先以簡單的文件讀寫實現為基礎，FileHelper類中的readFile方法用於讀取文件內容，writeFile方法用於向文件中寫入內容。
import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileReader;import java.io.FileWriter;public class FileHelper { public static String readFile(String filename) throws Exception { BufferedReader reader = new BufferedReader(new FileReader(filename)); String ans = "", line = null; while((line = reader.readLine()) != null){ ans += line + "/r/n"; } reader.close() ; return ans; } public static void writeFile(String content, String filename) throws Exception { BufferedWriter writer = new BufferedWriter(new FileWriter(filename)); writer.write(content); writer.flush(); writer.close() ; } public static void main(String[] args) throws Exception { String ans = readFile("D://input.txt"); writeFile(ans, "D://output.txt"); }}然後在FileHelper類的基礎上寫一個WebpageMaker類，其createPage方法用於將特定文件中的內容生成在特定的網頁中。
其中如果要插入代碼可以將代碼加入中。
import java.util.StringTokenizer;public class WebpageMaker { public static String initBegin() { String s = "<!doctype html><html><head><title></title></head><body>/r/ n"; return s; } public static String initEnd() { String s = "/r/n</body></html>/r/n"; return s; } public static void createPage(String inputfilename, String outputfilename ) throws Exception { String content = FileHelper.readFile(inputfilename); StringTokenizer st = new StringTokenizer(content, "/r/n"); String ans = ""; ans += initBegin(); boolean isCoding = false; while( st.hasMoreElements()) { String s = st.nextToken(); int len = s.length(); for(int i=0;i<len;i++) { if(i+6 <= len && s. substring(i,i+6).equals("<alex>")) { isCoding = true; ans += "<pre style=/"background-color:aliceblue/">"; i += 5; continue; } if(i+7 <= len && s.substring(i,i+7).equals("</alex>")) { isCoding = false; ans += "</pre>"; i += 6 ; continue; } char c = s.charAt(i); if(c == '/"') ans += ""; else if(c == '&') ans += "&"; else if( c == '<') ans += "<"; else if(c == '>') ans += ">"; else if(c == ' ') ans += ""; else if(c == '/t') ans += ""; else ans += c; } if(false == isCoding) ans += "<br />/r/n"; else ans += "/r/n "; } ans += initEnd(); FileHelper.writeFile(ans, outputfilename); } public static void main(String[] args) throws Exception { createPage("D://test.txt", "D:// test.html"); }}樣例：
輸入文件：test.txt
hello world！大家好：）#include int main() { printf("hello world!/n"); return 0;}輸出文件：test.html
<!doctype html><html><head><title></title></head><body>hello world！ <br />大家好：）<br /><pre style="background-color:aliceblue">#include <stdio.h>int main() { printf("hello world!/n"); return 0; }</pre><br /></body></html>效果如下：
hello world！大家好：）#include <stdio.h>int main() { printf("hello world!/n"); return 0;}