使用spm build 批量打包压缩seajs 代码

时间:2023-03-09 00:37:59
使用spm build 批量打包压缩seajs 代码

一,安装环境

1.安装spm

spm工具是基于node(nodejs的服务平台)的,因此我们需要先安装 node 和 npm 下载地址:http://nodejs.org/#download.下载完成后安装即可。

node安装完成后,找到cmd命令文件以管理员的方式打开,输入以下命令进行安装:

npm install spm -g

在此过程中,可能需要你很长的时间等待。(偶尔可能连接失败了,你需要关闭cmd后重新开启并执行同样的命令,过程将继续)

使用spm build 批量打包压缩seajs 代码

安装完成后,恭喜你,可以使用了。

2.spm的使用

使用spm其实就是执行cmd命令,安装完成后,你就可以使用命令了 (当然有很多命令的),输入:

spm help

你会看到所有的命令。我们主要用的命令就是

spm build

当然得注意两点:

(1).需要将执行目录切换到项目。比如你的项目js目录在D:/www/spm/js下;则需要先用cmd命令切换到D:/www/spm/js.见下图

(2).项目的js目录结构里面必须包含src目录,即未合并和压缩的js文件(seajs模块文件)。目录结构约定传送门。

使用spm build 批量打包压缩seajs 代码

最后,这些只是将了我接触的时候遇到的问题,具体spm命令及使用细节请见官方文档

https://github.com/spmjs/spm/

二,批量压缩类

写了个类查找所有JS文件,调用DOS命令执行文件的压缩

package com.tank.test;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.LoggerFactory;
/**
 * @author tank
 * @date:Sep 24, 2012 4:14:58 PM
 * @description:
 * @version :1.0
 */
public class TestSeaJS {
    private static final Logger logger = Logger.getLogger(TestSeaJS.class);
    private static final String SRC_PATH = "F:/MyEclipseforSpring8.6/showcang/WebRoot/js";
    private static final String OUT_PATH = "D:/apache-tomcat-6.0.35/webapps/showcang/js";
    //private static final String APP_URL = "http://127.0.0.1:8080/js";
    private static final String APP_URL = "http://www.showcang.com/js";
    // private static final String CMD = "spm build #0# --combine --app_url #1#
    // --app_path #2# --out_path #3#";
    private static StringBuffer sb = new StringBuffer();
  
    public static void main(String[] args) {
        //String cmdStr = "spm build ${0} --combine --app_url ${1} --app_path ${2} --out_path ${3}";
        File file = new File(SRC_PATH);
        StringBuffer sbcontext = new StringBuffer();
        // sbcontext.append("d: \r");
        // sbcontext.append("cd D:/Soft/seajs-spm-ab7a728/demo/js \r");
        findFile(file, sbcontext);
        new FileHelper().getWriteTXT("c:/seajs.bat", sbcontext.toString());
        logger.info("压缩完成!");
    }
    public static void findFile(File file, StringBuffer sbcontext) {
        File[] dir = file.listFiles();
        for (File f : dir) {
            if (f.isFile()) {
                String filepath = f.getAbsolutePath();
                if (filepath != null && filepath.toLowerCase().endsWith("js")) {
                    String dirpath = f.getParentFile().getPath();
                    String outPath = dirpath.substring(SRC_PATH.length());
                    sb.delete(0, sb.length());
                    sb.append("spm build ").append(filepath).append(" --combine --app_url ").append(APP_URL).append(" --app_path ").append(dirpath).append(
                            " --out_path ").append(OUT_PATH).append(outPath);
                    sbcontext.append(sb.toString());
                    Runtime rt = Runtime.getRuntime();
                    BufferedReader br = null;
                    try {
                        Process process = rt.exec("cmd  /C " + sb.toString());
                        br = new BufferedReader(new InputStreamReader(process.getInputStream()));
                        String line = br.readLine();
                        while (line != null) {
                            logger.info(line);
                            line = br.readLine();
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                        logger.error(e.getMessage());
                    } finally {
                        if (br != null) {
                            try {
                                br.close();
                            } catch (Exception e) {
                                e.printStackTrace();
                                logger.error(e.getMessage());
                            }
                        }
                    }
                    sbcontext.append("\r");
                }
            } else if (file.isDirectory()) {
                findFile(f, sbcontext);
            }
        }
    }
}

  文件帮助类:

package com.tank.test;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
/**
 * @author tank
 * @date:Sep 26, 2011 9:03:29 PM
 * @description: 纯文本文件操作类 .txt
 * @version :
 */
public class FileHelper {
    public String getReadTXT(String path) {
        BufferedReader br = null;
        try {
            br = new BufferedReader(new InputStreamReader(new FileInputStream(path), "utf-8"));
            String data = null;
            StringBuffer sbf = new StringBuffer();
            while ((data = br.readLine()) != null) {
                sbf.append(data);
            }
            return sbf.toString();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        return null;
    }
    public boolean getWriteTXT(String path, String writeContext) {
        OutputStreamWriter fw = null;
        try {
            fw = new OutputStreamWriter(new FileOutputStream(path), "utf-8");
            fw.write(writeContext, 0, writeContext.length());
            fw.flush();
            return true;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return false;
        } finally {
            try {
                fw.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}

  三,写批处理调用

java -jar compass.jar

  执行bat即可!

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