先以简单的文件读写实现为基础，FileHelper类中的readFile方法用于读取文件内容，writeFile方法用于向文件中写入内容。
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");
}
}
然后在FileHelper类的基础上写一个WebpageMaker类，其createPage方法用于将特定文件中的内容生成在特定的网页中。
其中如果要插入代码可以将代码加入中。
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");
}
}
样例：
输入文件：test.txt
hello world！
大家好：）
#include
int main() {
printf("hello world!\n");
return 0;
}
输出文件：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;
}