getjspsrc.java

来自「JSP2.0实用教程实例源码」· Java 代码 · 共 34 行

package myFunction;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.servlet.jsp.PageContext;

public class GetJSPSrc {
   //两个参数，分别为文件名和页面上下文pageContext
   //返回值为字符串
   public static String source(String filename, PageContext pageContext)
        throws IOException {
        InputStream in;
        BufferedReader br;
        StringBuffer buf = new StringBuffer();
        // 使用servlet上下文读取文件
        in = pageContext.getServletContext().getResourceAsStream(filename);
        br = new BufferedReader(new InputStreamReader(in));
        String line = br.readLine();
        while (line != null) {
          // 将标记替换为符号对象
          line = line.replaceAll("<", "&lt;");
          line = line.replaceAll(">", "&gt;");
          // 文件内容的缓冲
          buf.append(line + "\n");
          line = br.readLine();
        }
        br.close();
        // 返回文件内容
        return buf.toString();
      }
    }