java 利用7z.exe 压缩解压

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;

public class Sevenzip2 {
   
   

static String sevenZipPath = "C:\\Program Files\\7-Zip\\7z.exe"; // 7zip程序的路径
String outDir="out";

public String getOutDir() {
   
   
	return outDir;
}

public void setOutDir(String outDir) {
   
   
	this.outDir = outDir;
	File dir=new File(outDir);
	dir.mkdirs();
}
/**
 * 
 * @param filename 文件名
 * @param dir 要压缩的文件夹
 */
public void compress(String filepath, String dir) {
   
   
	   String filename= Paths.get(filepath).getFileName().toString();
	   String newfile=this.getOutDir()+File.separatorChar+filename;
	   newfile =filepath;
	   System.out.println("压缩到"+newfile);
      ProcessBuilder pb = new ProcessBuilder(sevenZipPath, "a", "-tzip",newfile, dir);

    try {
   
   
        Process process = pb.start();
        int exitcode=process.waitFor(); // 等待命令执行完毕
        if(0!=exitcode) {
   
   
    		System.out.println("压缩错误");
    		System.exit(0