基于HTML5的文档阅读器代码,Java代码库,德仔网

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【Java】基于HTML5的文档阅读器

作者:ulwvfje / 发布于2014/8/12/ 596


	<%@page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
	<%@page import="java.io.InputStream" %>
	<%@page import="java.io.FileInputStream" %>
	<%@page import="java.io.ByteArrayOutputStream" %>
	<%@page import="java.io.IOException" %>
	<%!
	public static String toBase64(InputStream in) throws IOException {
	 ByteArrayOutputStream bout = new ByteArrayOutputStream();
	 int len;
	 byte[] buf = new byte[4096];
	 while (true) {
	 len = in.read(buf);
	 if (len > 0) {
	 bout.write(buf, 0, len);
	 } else {
	 break;
	 }
	 }
	 bout.flush();
	 bout.close();
	 in.close();
	 final byte[] data = bout.toByteArray();
	 char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=".toCharArray();
	 byte[] codes = new byte[256];
	 for (int i = 0; i < 256; i++) {
	 codes[i] = -1;
	 }
	 for (int i = 'A'; i <= 'Z'; i++) {
	 codes[i] = (byte) (i - 'A');
	 }
	 for (int i = 'a'; i <= 'z'; i++) {
	 codes[i] = (byte) (26 + i - 'a');
	 }
	 for (int i = '0'; i <= '9'; i++) {
	 codes[i] = (byte) (52 + i - '0');
	 }
	 codes['+'] = 62;
	 codes['/'] = 63;
	 final char[] out = new char[((data.length + 2) / 3) * 4];
	 for (int i = 0, index = 0; i < data.length; i += 3, index += 4) {
	 boolean quad = false;
	 boolean trip = false;
	
	 int val = (0xFF & data[i]);
	 val <<= 8;
	 if ((i + 1) < data.length) {
	 val |= (0xFF & data[i + 1]);
	 trip = true;
	 }
	 val <<= 8;
	 if ((i + 2) < data.length) {
	 val |= (0xFF & data[i + 2]);
	 quad = true;
	 }
	 out[index + 3] = alphabet[(quad ? (val & 0x3F) : 64)];
	 val >>= 6;
	 out[index + 2] = alphabet[(trip ? (val & 0x3F) : 64)];
	 val >>= 6;
	 out[index + 1] = alphabet[val & 0x3F];
	 val >>= 6;
	 out[index + 0] = alphabet[val & 0x3F];
	 }
	 return new String(out);
	}
	%>
	<%
	//服务器端文件
	String fileName = "d:/test.docx";
	%>
	<html>
	<head>
	 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	</head>
	<body>
	<script type="text/javascript" src="http://xdoc.sinaapp.com/xdoc.js"></script>
	<script type="text/javascript">
	XDoc.to("data:application/<%=fileName.substring(fileName.lastIndexOf('.') + 1)%>;base64,<%=toBase64(new FileInputStream(fileName))%>", "html5");
	</script>
	</body>
	</html>

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　HTML5　　文档阅读器　

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