java ZipOutputStream打包zip后文件被占用无法删除

￡神魔★判官ぃ 2022-05-10 03:10 597阅读 1赞

先上代码

public static boolean fileToZip(String sourceFilePath,String zipFilePath,String fileName) {  
            boolean flag = false;  
            File sourceFile = new File(sourceFilePath);  
            FileInputStream fis = null;  
            BufferedInputStream bis = null;  
            BufferedOutputStream bos=null;
            FileOutputStream fos = null;  
            ZipOutputStream zos = null;  
              
            if(sourceFile.exists() == false) {  
                System.out.println(">>>>>> 待压缩的文件目录：" + sourceFilePath + " 不存在. <<<<<<");  
            } else {  
                try {  
                    File zipFile = new File(zipFilePath + "/" + fileName + ".zip");
                    if(zipFile.exists()){
                    	if(DeleteFile.delete(zipFilePath + "/" + fileName + ".zip")){
                    		System.out.println(">>>>>> 删除" + zipFilePath + fileName + ".zip" + " 文件成功. <<<<<<"); 
                    	}
                    }
                    if(zipFile.exists()) {  
                        System.out.println(">>>>>> " + zipFilePath + " 目录下存在名字为：" + fileName + ".zip" + " 打包文件. <<<<<<");  
                    } else {  
                        File[] sourceFiles = sourceFile.listFiles();  
                        if(null == sourceFiles || sourceFiles.length < 1) {  
                            System.out.println(">>>>>> 待压缩的文件目录：" + sourceFilePath + " 里面不存在文件,无需压缩. <<<<<<");  
                        } else {  
                            fos = new FileOutputStream(zipFile);  
                            bos =new BufferedOutputStream(fos);
                            zos = new ZipOutputStream(bos);  
                            byte[] bufs = new byte[1024*10];  
                            for(int i=0;i<sourceFiles.length;i++) {  
                                // 创建ZIP实体,并添加进压缩包  
                                ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());  
                                zos.putNextEntry(zipEntry);  
                                // 读取待压缩的文件并写进压缩包里  
                                fis = new FileInputStream(sourceFiles[i]);  
                                bis = new BufferedInputStream(fis,1024*10);  
                                int read = 0;  
                                while((read=bis.read(bufs, 0, 1024*10)) != -1) {  
                                    zos.write(bufs, 0, read);  
                                }
                            }
                            flag = true;  
                        }  
                    }  
                } catch (FileNotFoundException e) {  
                    e.printStackTrace();  
                    throw new RuntimeException(e);  
                } catch (IOException e) {  
                    e.printStackTrace();  
                    throw new RuntimeException(e);  
                } finally {  
                    // 关闭流  
                    try {  
                        if(null != zos) zos.close();
                        if(null != bis) bis.close();  
                        if(null != fis) fis.close();  
                        if(null != bos) bos.close();  
                        if(null != fos) fos.close();  
                    } catch (IOException e) {  
                        e.printStackTrace();  
                        throw new RuntimeException(e);  
                    }  
                }  
            }  
              
            return flag;  
        }

主要原因还是自己对流不熟悉，for多个文件时，直接给流new一个新对象，所有导致之前的流对象在java虚拟机中没有被回收，所有才有了[调用gc回收流  
][gc_]

**真的该好好复习基础知识了**[引用与对象][Link 1]

**解决：**  
在for循环里把流关掉

for(int i=0;i<sourceFiles.length;i++) {  
            // 创建ZIP实体,并添加进压缩包  
            ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());  
            zos.putNextEntry(zipEntry);  
            // 读取待压缩的文件并写进压缩包里  
            fis = new FileInputStream(sourceFiles[i]);  
            bis = new BufferedInputStream(fis,1024*10);  
            int read = 0;  
            while((read=bis.read(bufs, 0, 1024*10)) != -1) {  
                zos.write(bufs, 0, read);  
            }
            bis.close();
            fis.close();
        }

一直以为是java.util.zip.ZipEntry，java.util.zip.ZipOutputStream 没正确使用的问题

[gc_]: https://blog.csdn.net/my13413527259/article/details/82732471
[Link 1]: https://www.cnblogs.com/focusChen/articles/2497768.html