Html2Js－－Html代码到Javascript文件的转换

之前在网上有一些现成的转换工具的，不过有些是Javascript，只限于Web环境下使用，有些是本地程序，但是没有编码的选项，只是单纯的提供输入及输出，工作的时候需要处理些特殊编码的文件的时候就没法子了。没办法，只有自已写一个转换工具，满足自已的需要。因为时间关系，暂时写了一个在控制台下运行的程序，谁有兴趣，帮忙做个界面出来也不错。呵，下面是所有代码。可惜，我机子上没用Java2Html的插件，要不代码就没这么难看了。。。不过将就下了。

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.nio.charset.Charset;

public class Html2Js {
    private String source;

    private String dist;

    private String encoding;

    public static String html2js(String html) {
        StringBuffer sb = new StringBuffer(html);
        StringBuffer js = new StringBuffer();
        for (int i = 0; i < sb.length(); i++) {
            if (sb.charAt(i) == '"') {
                sb.replace(i, i, "\\");
                i++;
            }
        }
        for (int i = 0; i < sb.length(); i++) {
            if (sb.charAt(i) == '\n') {
                sb.replace(i, i, "\"+");
                i = i + 2;
            }
        }
        for (int i = 0; i < sb.length(); i++) {
            if (sb.charAt(i) == '\n') {
                sb.replace(i + 1, i + 1, "\"");
                i = i + 2;
            }
        }
        js.append("document.write(\"");
        js.append(sb);
        js.append("\");");
        return js.toString();
    }

    public static void main(String[] arg) {
        if (arg.length == 0) {
            System.out
                    .println("useage: java Html2Js <sourcePath> [distPath] [encoding]\n"
                            + " -sourcePath: specify your source HTML file\n"
                            + " -distPath: specify your expect path of the file generate by program,defaul the same as sourcePath\n"
                            + " -encoding: specify the encoding of the source file,the output use the same encoding,if not specify,use the system file encoding");
            return;
        }
        // prepare
        Html2Js tool = new Html2Js();
        tool.source = arg[0];

        if (arg.length > 1)
            tool.dist = arg[1];
        else
            tool.dist = tool.source.substring(0, tool.source.lastIndexOf('.'))
                    + ".js";

        if (arg.length > 2)
            tool.encoding = arg[2];
        else
            tool.encoding = System.getProperty("file.encoding");

        // read the source
        try {
            String html = tool.getSource().replaceAll("\r", "");
            tool.genFile(tool.dist, html2js(html), tool.encoding);
            System.out.println("html2js finish!");
        } catch (FileNotFoundException e) {
            System.err.println("Fatal error! source file : " + tool.source
                    + "not found!");
            throw new RuntimeException(e.getMessage());
        } catch (IOException e) {
            System.err.println("Fatal error!");
            throw new RuntimeException(e.getMessage());
        }
    }

    /**
     * 从源文件读进文本
     *
     * @throws IOException
     */
    public String getSource() throws IOException {
        StringBuffer sb = new StringBuffer();
        Reader reader = new InputStreamReader(new FileInputStream(source),
                Charset.forName(encoding));
        int read = 0;
        char[] data = new char[1024];

        while ((read = reader.read(data, 0, 1024)) != -1) {
            sb.append(data, 0, read);
        }

        return sb.toString();
    }

    public void genFile(String fullFileName, String body, String encoding)
            throws IOException {
        File file = new File(fullFileName);
        FileOutputStream fos = null;

        fos = new FileOutputStream(file);

        OutputStreamWriter writer = new OutputStreamWriter(fos, Charset
                .forName(encoding));
        if (body != null && !"".equals(body)) {
            writer.write(body);
            writer.close();
        }
    }

    public void setDist(String dist) {
        this.dist = dist;
    }

    public void setEncoding(String encoding) {
        this.encoding = encoding;
    }
   
    public void setSource(String source) {
        this.source = source;
    }
}