Java生成压缩文件的实例代码

生成压缩文件是编程中常见的功能之一，Java在java.util.zip包下提供了ZipOutputStream和ZipEntry类，可以方便地生成zip压缩文件。本文分享Java生成压缩文件的实例代码。

1. 导入相关类

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

2. 创建ZipOutputStream对象

File zipFile = new File("压缩文件路径");
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile));

3. 创建ZipEntry对象并将该对象添加到ZipOutputStream

File fileToZip = new File("被压缩文件路径");
ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
zos.putNextEntry(zipEntry);

4. 读取被压缩文件，将数据写入ZipOutputStream

FileInputStream fis = new FileInputStream(fileToZip);
byte[] buffer = new byte[1024];
int len;
while ((len = fis.read(buffer)) > 0) {
    zos.write(buffer, 0, len);
}

5. 关闭ZipOutputStream和FileInputStream对象

zos.closeEntry();
zos.close();
fis.close();

下面给出两个示例说明。

示例1：压缩单个文件

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

public class ZipSingleFile {
    public static void main(String[] args) {
        zipSingleFile(new File("被压缩文件路径"), new File("压缩文件路径"));
    }

    public static void zipSingleFile(File fileToZip, File zipFile) {
        try {
            ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile));
            ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
            zos.putNextEntry(zipEntry);

            FileInputStream fis = new FileInputStream(fileToZip);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = fis.read(buffer)) > 0) {
                zos.write(buffer, 0, len);
            }
            fis.close();

            zos.closeEntry();
            zos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

示例2：压缩多个文件

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

public class ZipMultiFile {
    public static void main(String[] args) {
        zipMultiFile(new File[]{"文件1路径", "文件2路径", "文件3路径"}, new File("压缩文件路径"));
    }

    public static void zipMultiFile(File[] filesToZip, File zipFile) {
        try {
            ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile));
            for (File fileToZip : filesToZip) {
                ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
                zos.putNextEntry(zipEntry);

                FileInputStream fis = new FileInputStream(fileToZip);
                byte[] buffer = new byte[1024];
                int len;
                while ((len = fis.read(buffer)) > 0) {
                    zos.write(buffer, 0, len);
                }
                fis.close();

                zos.closeEntry();
            }
            zos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

以上就是Java生成压缩文件的实例代码攻略，希望对你有所帮助。