Java工具封装：Html、Css、Javascript文件内容压缩

1. Javascript压缩

1.1 closure-compiler

Maven： https://mvnrepository.com/artifact/com.google.javascript/closure-compiler

<dependency>
    <groupId>com.google.javascriptgroupId>
    <artifactId>closure-compilerartifactId>
    <version>v20220502version>
dependency>
1
2
3
4
5
6
7

 

public class ContentConverUtil {
    private static File tempJavascriptDir = FileUtil.mkdir("temp/generateCode/javascript");

    /**
     * Javascript压缩
     *
     * @param javascriptCotnent 待压缩的javascript内容
     * @return
     */
    @SneakyThrows
    public static String javascriptCompressor(String javascriptCotnent) {
        String result = javascriptCotnent;
        if (StrUtil.isNotBlank(javascriptCotnent)) {
            File rowjavascriptCotnentTempFile = FileUtil.createTempFile(tempJavascriptDir);
            File compressorjavascriptCotnentTempFile = FileUtil.file(tempJavascriptDir, StrUtil.format("{}.min.js", IdUtil.getSnowflakeNextIdStr()));
            try {
                FileUtil.writeUtf8String(javascriptCotnent,rowjavascriptCotnentTempFile);
                String[] args = new String[]{"--js", FileUtil.getAbsolutePath(rowjavascriptCotnentTempFile), "--js_output_file", FileUtil.getAbsolutePath(compressorjavascriptCotnentTempFile), "--warning_level", "QUIET"};
                Constructor<CommandLineRunner> constructor = ReflectUtil.getConstructor(CommandLineRunner.class, String[].class);
                CommandLineRunner commandLineRunner = constructor.newInstance((Object)args);
                ReflectUtil.invoke(commandLineRunner, "doRun", new Object[0]);
                result = FileUtil.readString(compressorjavascriptCotnentTempFile, StandardCharsets.UTF_8);
            } finally {
                FileUtil.del(rowjavascriptCotnentTempFile);
                FileUtil.del(compressorjavascriptCotnentTempFile);
            }
        }
        return result;
    }

}    
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

2. Html压缩

2.1 htmlcompressor

Maven： https://mvnrepository.com/artifact/com.googlecode.htmlcompressor/htmlcompressor/1.5.2

<dependency>
    <groupId>com.googlecode.htmlcompressorgroupId>
    <artifactId>htmlcompressorartifactId>
    <version>1.5.2version>
dependency>
1
2
3
4
5
6

 
ContentConverUtil.java

public class ContentConverUtil {
    /**
     * HTML压缩
     * @param htmlCotnent
     * @return
     */
    @SneakyThrows
    public static String htmlCompressor(String htmlCotnent) {
        if(StrUtil.isNotBlank(htmlCotnent)) {
            HtmlCompressor htmlCompressor = new HtmlCompressor();
            return htmlCompressor.compress(htmlCotnent);
        }
        return htmlCotnent;
    }
}    
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

3. Css压缩

3.1 yuicompressor

Maven： https://mvnrepository.com/artifact/com.yahoo.platform.yui/yuicompressor

pom.xml

        
        <dependency>
            <groupId>com.yahoo.platform.yuigroupId>
            <artifactId>yuicompressorartifactId>
            <version>2.4.8version>
        dependency>
1
2
3
4
5
6

 
ContentConverUtil.java

public class ContentConverUtil {

    /**
     * CSS压缩
     *
     * @param cssCotnent 待压缩的css内容
     * @return
     */
    @SneakyThrows
    public static String cssCompressor(String cssCotnent) {
        if (StrUtil.isNotBlank(cssCotnent)) {
            BufferedReader reader = null;
            ByteArrayOutputStream resultOutputStream = null;
            Writer writer = null;
            try {
                reader = IoUtil.getReader(new ByteArrayInputStream(cssCotnent.getBytes()), StandardCharsets.UTF_8);
                CssCompressor cssCompressor = new CssCompressor(reader);
                resultOutputStream = new ByteArrayOutputStream();
                writer = new OutputStreamWriter(resultOutputStream, StandardCharsets.UTF_8);
                cssCompressor.compress(writer, -1);
            } finally {
                IoUtil.close(reader);
                IoUtil.close(writer);  // 必须先关闭流，字符数组才有数据
            }
            cssCotnent = IoUtil.toStr(resultOutputStream, StandardCharsets.UTF_8);
        }
        return cssCotnent;
    }

}    
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30