java将查询数据写入zip压缩包内

  public static void filetest() throws IOException {
      String zipPath = "D:\\fileTest\\image\\3.zip";      //压缩包路径
      String str1 = "测试test123abc";                      //需要写入的数据
      String str2 = "测试2";
      String Name1 = StringUtils.join("文件.json");      //压缩包里的文件
      String Name2 = StringUtils.join("file/文件1.json");  //在压缩包里创建file目录下的文件
      //创建压缩包
      ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(zipPath));
    //与方式二匹配使用（使用缓冲流）     
      BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(zipOutputStream);
      //创建压缩包里的文件
      zipOutputStream.putNextEntry(new ZipEntry(Name1));
      byte[] bytes1 = str1.getBytes(StandardCharsets.UTF_8);
      zipOutputStream.write(bytes1, 0, bytes1.length);    //将数据写入到压缩包里的文件里面
      zipOutputStream.closeEntry();
 
      zipOutputStream.putNextEntry(new ZipEntry(Name2));
      byte[] bytes2 = str2.getBytes(StandardCharsets.UTF_8);
    //方式一将数据写入文件（不适用缓冲流）     
    // zipOutputStream.write(bytes2, 0, bytes2.length);
    //方式二将数据写入文件（使用缓存流）      
      bufferedOutputStream.write(bytes, 0, bytes.length);
 
      zipOutputStream.closeEntry();
 
      zipOutputStream.flush();
      zipOutputStream.close();
  }

image.png

• f ile文件夹里面是文件1.json，里面的内容是“测试2”，文件.json的内容则是“测试test123abc”。

使用缓冲流将文件写入json文件

    public static void writeString(File file, String content) {

        BufferedWriter bufferedWriter = null;
        try {
            bufferedWriter = new BufferedWriter(new FileWriter(file));
            bufferedWriter.write(content);
            bufferedWriter.flush();
            bufferedWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                //关闭流释放资源
                bufferedWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
//测试
  public static void main(String[] args) {

        long stime1 = System.currentTimeMillis();
        for (int j = 0; j <100 ; j++) {
            File file = new File("G://wyh//out"+j+".json");
            boolean b = file.exists();
            if (!b) {
                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            List> list = new ArrayList<>();
            int[] ints = new int[]{1,2,34,2,3,2};
            Map map = new HashMap<>();
            Map map1 = new HashMap<>();

            list.add(map);
            for (int i = 0; i < 100000; i++) {
                map.put("Image"+i,"图片");
                map.put("Width"+i,"800");
                map.put("Height"+i,"Height");
                map.put("Title"+i,"View from 15th Floor");

                map1.put("Image","图片");
                map1.put("Width","800");
                map1.put("Height","Height");
                map1.put("Title","View from 15th Floor");
                map.put("IDsmap"+i,map1);
                map.put("IDs"+i,ints);
            }


            String json = JSON.toJSONString(map);
            writeString(file, json);
        }
        long etime1 = System.currentTimeMillis();
        System.out.println("-----------end-----------"+(etime1 - stime1));

    }

多文件压缩

package com.edc.erp.task.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 压缩多个文件
 */
public class ZipMultiFile {
    public static void main(String[] args) {
        File[] srcFiles = {new File(""), new File("D:\\hhh\\Massage-app.zip")};
        File zipFile = new File("D:\\hhh\\"+System.currentTimeMillis()+".zip");
        // 调用压缩方法
        zipFiles(srcFiles, zipFile);
        System.out.println("压缩完成！");
    }

    public static void zipFiles(File[] srcFiles, File zipFile) {
        // 判断压缩后的文件存在不，不存在则创建
        if (!zipFile.exists()) {
            try {
                zipFile.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        // 创建 FileOutputStream 对象
        FileOutputStream fileOutputStream = null;
        // 创建 ZipOutputStream
        ZipOutputStream zipOutputStream = null;
        // 创建 FileInputStream 对象
        FileInputStream fileInputStream = null;

        try {
            // 实例化 FileOutputStream 对象
            fileOutputStream = new FileOutputStream(zipFile);
            // 实例化 ZipOutputStream 对象
            zipOutputStream = new ZipOutputStream(fileOutputStream);
            // 创建 ZipEntry 对象
            ZipEntry zipEntry = null;
            // 遍历源文件数组
            for (int i = 0; i < srcFiles.length; i++) {
                // 将源文件数组中的当前文件读入 FileInputStream 流中
                fileInputStream = new FileInputStream(srcFiles[i]);
                // 实例化 ZipEntry 对象，源文件数组中的当前文件
                zipEntry = new ZipEntry(srcFiles[i].getName());
                zipOutputStream.putNextEntry(zipEntry);
                // 该变量记录每次真正读的字节个数
                int len;
                // 定义每次读取的字节数组
                byte[] buffer = new byte[1024];
                while ((len = fileInputStream.read(buffer)) > 0) {
                    zipOutputStream.write(buffer, 0, len);
                }
            }
            zipOutputStream.closeEntry();
            zipOutputStream.close();
            fileInputStream.close();
            fileOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}