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FastChar-ExtJs is a Java Web framework that uses extjs libraries.Quickly build a background management system

There is a newer version: 2.2.2

package com.fastchar.extjs.goole.compress;

import com.fastchar.core.FastChar;
import com.fastchar.utils.FastBase64Utils;
import com.fastchar.utils.FastFileUtils;
import com.fastchar.utils.FastMD5Utils;
import com.fastchar.utils.FastStringUtils;
import com.google.javascript.jscomp.CompilationLevel;
import com.google.javascript.jscomp.Compiler;
import com.google.javascript.jscomp.CompilerOptions;
import com.google.javascript.jscomp.SourceFile;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class GoogleCompress {


    /**
     * 压缩js代码
     *
     * @param path 可为目录或文件
     */
    public static void compress(String path) throws Exception {
        compress(path, path);
    }

    /**
     * 压缩js代码
     *
     * @param path 可为目录或文件
     */
    public static void compress(String path, String targetPath) throws Exception {
        File file = new File(path);
        if (file.isFile() && file.getName().endsWith(".js")) {
            doCompress(file.getPath(), targetPath);
        } else {
            File[] files = file.listFiles();
            if (files != null) {
                for (File file2 : files) {
                    compress(file2.getAbsolutePath());
                }
            }
        }
    }

    public static String compressByCode(String sourceCode) {
        Compiler compiler = new Compiler();

        CompilerOptions options = new CompilerOptions();
        CompilationLevel.SIMPLE_OPTIMIZATIONS.setOptionsForCompilationLevel(options);
        options.setEmitUseStrict(false);
        options.setLanguageOut(CompilerOptions.LanguageMode.ECMASCRIPT5);

        SourceFile extern = SourceFile.fromCode("extern.js",
                "function alert(x) {}");

        SourceFile input = SourceFile.fromCode("input.js", sourceCode);
        compiler.compile(extern, input, options);

        return compiler.toSource();
    }

    private static void doCompress(String sourcePath, String savePath) {
        try {
            String code = FastFileUtils.readFileToString(new File(sourcePath), FastChar.getConstant().getCharset());
            FastFileUtils.writeStringToFile(new File(savePath), compressByCode(code), FastChar.getConstant().getCharset());
        } catch (IOException e) {
            FastChar.getLogger().error(GoogleCompress.class, e);
        }
    }



}