如何在java里面操作excel文件里面的对象

Posted 2023-03-20

/**
* @author liuwu
* Excel的导入与导出
*/
@SuppressWarnings( "unchecked" )
public class ExcelOperate
/**
* @author liuwu
* 这是一个通用的方法，利用了JAVA的反射机制,
* 可以将放置在JAVA集合中并且符合一定条件的数据以EXCEL的形式输出到指定IO设备上
* @param title 表格标题名
* @param headers 表格属性列名数组
* @param dataset 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。
* 此方法支持的 javabean属性【数据类型有java基本数据类型及String,Date,byte[](图片转成字节码)】
* @param out 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
* @param pattern 如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
* @throws IOException
*/
public static void exportExcel(String title, String[] headers,Collection dataset, OutputStream out, String pattern) throws IOException
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 20);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++)
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);

// 遍历集合数据，产生数据行
Iterator it = dataset.iterator();
int index = 0;
while (it.hasNext())
index++;
row = sheet.createRow(index);
Object t = it.next();
// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++)
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);//注意 实体get Set不要自己改名字不然反射会有问题
try
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,new Class[] );
Object value = getMethod.invoke(t, new Object[] );
HSSFRichTextString richString = new HSSFRichTextString(value.toString());
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
catch (SecurityException e)
e.printStackTrace();
e=null;
catch (NoSuchMethodException e)
e.printStackTrace();
e=null;
catch (IllegalArgumentException e)
e.printStackTrace();
e=null;
catch (IllegalAccessException e)
e.printStackTrace();
e=null;
catch (InvocationTargetException e)
e.printStackTrace();
e=null;
finally
// 清理资源



try
workbook.write(out);
catch (IOException e)
e.printStackTrace();
e=null;


参考技术A 使用POI组件，去网上下个POIjar包，使用不是太难

Java 上传解压zip文件，并且解析文件里面的excel和图片

需求：上传一个zip文件，zip文件里面包含一个excel和很多图片，需要把excel里面的信息解析出来保存到表中，同时图片也转化成base64保存到数据库表中。

PS:为了方便不同水平的开发人员阅读，我把代码全部写到Controller里面。这个demo的file入参的类型是MultipartFile，很多网上的例子是File类型。这两个类型在解析文件的时候还是有点区别的。

第①个方法：

 1     /**
 2      * 这个deomo入参的类型是MultipartFile，很多网上的例子是File类型
 3      * @param file (zip)
 4      * @param request
 5      * @param response
 6      * @return
 7      * @throws Exception
 8      */
 9     @PostMapping("/addPersonsFileOfZip")
10     public String addPersonsFileOfZip(@RequestParam("file") MultipartFile file, HttpServletRequest request) throws Exception 
11         String createdId = request.getParameter(KEY_CREATED_ID);
12         //正常上这里需要检查一下createdId是否为空
13         
14         //原则上这个uploadZipFilesAndParse方法需要写到service和serviceImpl中
15         String result =uploadZipFilesAndParse(file,createdId);
16         return  result;
17     

第②个方法：

 1     /**
 2      *返回的是批次号
 3      *同时我另外开了线程处理zip文件里面的图片和excel，
 4      */
 5     @Override
 6     public String uploadZipFilesAndParse(MultipartFile file, String createdId) throws Exception 
 7         String filename = file.getOriginalFilename();
 8         String fileType = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase(Locale.US);
 9         String uuid = UUID.randomUUID().toString();
10         //判断文件是不是zip类型
11         if(fileType.equals("zip"))
12             
13             //FileConfig.localtion是配置文件和config类生产的，我会在评论区附上这些代码，测试demo的时候大家可以直接把FileConfig.localtion替换成D:/test
14             //String desPath = FileConfig.localtion + File.separator + uuid.replaceAll("-", "");
15             String desPath = "D:/test" + File.separator + uuid.replaceAll("-", "");
16             
17             
18             //下面这三行的代码就是把上传文件copy到服务器，一定不要遗漏了。
19             //遗漏了这个代码，在本地测试环境不会出问题，在服务器上一定会报没有找到文件的错误
20             String savePath = FileConfig.localtion + File.separator;
21             File savefile = new File(savePath+filename);
22             file.transferTo(savefile);
23             
24             FileUtil fileUtil = new FileUtil();
25             //解压zip文件，我是写在公共类里面，FileUtil类代码评论区见
26             FileUtil.unZip(file, desPath,savePath);
27             new Thread(new Runnable() 
28                 @Override
29                 public void run() 
30                     List<File> fileList = new ArrayList<>();
31                     fileList = fileUtil.getSubFiles(desPath,fileList);
32                         for (File oneFile : fileList)
33                             if (oneFile.getName().toLowerCase().endsWith(".xls") || oneFile.getName().toLowerCase().endsWith(".xlsx") ) 
34                                 try 
35                                     //解析处理excel文件
36                                     parseExcelFile(oneFile,createdId,uuid);
37                                  catch (Exception e) 
38                                     LogUtils.error(e.getMessage());
39                                 
40                             else if(oneFile.getName().toLowerCase().endsWith(".jpg")) 
41                                 try 
42                                     //解析处理图片文件
43                                     parseImageFile(oneFile,createdId,uuid);
44                                  catch (Exception e) 
45                                     LogUtils.error(e.getMessage());
46                                 
47                             
48                             
49                         
50                         //最后要删除文件，删除文件的方法见评论区FileUtil类
51                         FileUtil.clearFiles(desPath);
52                         
53                 
54             ).start();            
55 
56         
57         return uuid;
58         

View Code

 第③个方法：解压zip文件的unzip方法

 1     public static void unZip(MultipartFile  srcFile, String destDirPath,String savePath) throws RuntimeException, IOException 
 2         long startTime = System.currentTimeMillis();
 3         
 4         File file = null;  
 5         InputStream ins = srcFile.getInputStream();  
 6         file=new File(savePath+srcFile.getOriginalFilename()); 
 7         LogUtils.info("MultipartFile transform to File,MultipartFile name:"+srcFile.getOriginalFilename());
 8         inputStreamToFile(ins, file);  
 9         
10         if (!file.exists()) 
11             throw new RuntimeException(file.getPath() + ",file is not found");
12         
13         ZipFile zipFile = null;
14         try 
15             zipFile = new ZipFile(file);
16             Enumeration<?> entries = zipFile.entries();
17             while (entries.hasMoreElements()) 
18                 ZipEntry entry = (ZipEntry) entries.nextElement();
19                 LogUtils.info("zipFile context name:"+entry.getName());
20                 if (entry.isDirectory()) 
21                     String dirPath = destDirPath + File.separator+ entry.getName();
22                     File dir = new File(dirPath);
23                     dir.mkdirs();
24                 else 
25                     File targetFile = new File(destDirPath + File.separator + entry.getName());
26                     targetFile.setExecutable(true);
27                     if(!targetFile.getParentFile().exists())
28                         targetFile.getParentFile().mkdirs();
29                     
30                     targetFile.createNewFile();
31                     InputStream is = zipFile.getInputStream(entry);
32                     FileOutputStream fos = new FileOutputStream(targetFile);
33                     int len;
34                     byte[] buf = new byte[1024];
35                     while ((len = is.read(buf)) != -1) 
36                         fos.write(buf, 0, len);
37                     
38                     fos.close();
39                     is.close();
40                 
41             
42             long endTime = System.currentTimeMillis();
43             LogUtils.info("unZip time-->" + (endTime - startTime) + " ms");
44         catch(Exception e) 
45             throw new RuntimeException("unzip error from FileUtil", e);
46          finally 
47             if(zipFile != null)
48                 try 
49                     zipFile.close();
50                  catch (IOException e) 
51                     e.printStackTrace();
52                 
53             
54             
55             //MultipartFile change to file may create a temp file in the project root folder(delete the temp file)
56             File del = new File(file.toURI());  
57             del.delete(); 
58         
59     

View Code

第④个方法：unzip方法中的inputStreamToFile方法，这个方法的目的是把MultipartFile转成File类型，但是会在项目根目录下生成一个临时文件，切记要删除

 1     private static void inputStreamToFile(InputStream ins, File file) 
 2         try 
 3             OutputStream os = new FileOutputStream(file);
 4             int bytesRead = 0;
 5             byte[] buffer = new byte[8192];
 6             while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) 
 7                 os.write(buffer, 0, bytesRead);
 8             
 9             os.close();
10             ins.close();
11             LogUtils.info("MultipartFile transform to File completed!");
12         catch(Exception e) 
13             e.printStackTrace();
14         
15     

View Code

第⑤个方法：parseExcelFile方法是解析excel的方法，里面包括我自己项目的逻辑处理，大家可以删除这些代码，只保留解析excel的代码就好

 1     private void parseExcelFile(File file,String createdId,String uuid) throws Exception 
 2         
 3         LogUtils.info("file name:"+file.getName());
 4         FileInputStream is = new FileInputStream(file); 
 5         Workbook workbook = WorkbookFactory.create(is);
 6         Sheet sheet = workbook.getSheetAt(0);
 7         
 8         int firstRowIndex = sheet.getFirstRowNum() + 1;
 9         int lastRowIndex = sheet.getLastRowNum();
10         
11         List<VapBatchPersonInfo> batchPersonList = new ArrayList<>();
12         for (int rIndex = firstRowIndex; rIndex <= lastRowIndex; rIndex++) 
13             
14             VapBatchPersonInfo vapBatchPersonInfo  = new VapBatchPersonInfo();
15             Row row = sheet.getRow(rIndex);
16             if (row != null) 
17                 int firstCellIndex = row.getFirstCellNum();
18                 int lastCellIndex = row.getLastCellNum();
19                 JSONObject jsonObject = new JSONObject();
20                 jsonObject.put(KEY_CREATED_ID, createdId);
21 
22                 Cell resultCell = row.createCell(lastCellIndex);
23                 Cell msgCell = row.createCell(lastCellIndex + 1);
24                 Boolean flag = false;
25                 for (int cIndex = firstCellIndex; cIndex < lastCellIndex; cIndex++) 
26                     Cell cell = row.getCell(cIndex);
27                     String titleName = sheet.getRow(0).getCell(cIndex).toString();
28                     String checkTitleName = checkTitleName(cIndex, titleName);
29                     if (!"SUCCESS".equals(checkTitleName)) 
30                         msgCell.setCellValue(checkTitleName);
31                         resultCell.setCellValue("Failed");
32                         flag = true;
33                         break;
34                     
35                     if (cell != null) 
36                         cell.setCellType(CellType.STRING);
37                         jsonObject.put(titleName, cell.toString());
38                     
39 
40                 
41                 if (flag) 
42                     rIndex = 0;
43                     lastRowIndex = 0;
44                  else 
45                     vapBatchPersonInfo.setBatchNo(uuid);
46                     vapBatchPersonInfo.setName(jsonObject.getString("fullName"));
47                     vapBatchPersonInfo.setImageName(jsonObject.getString("imageName"));
48                     vapBatchPersonInfo.setConfidenceThreshold(jsonObject.getString("confidenceThreshold"));
49                     vapBatchPersonInfo.setCreatedId(jsonObject.getString("createdId"));
50                     vapBatchPersonInfo.setIdentityNo(jsonObject.getString("identityNo"));
51                     vapBatchPersonInfo.setCreatedDate(new Date());
52                     vapBatchPersonInfo.setLastUpdatedId(jsonObject.getString("createdId"));
53                     vapBatchPersonInfo.setLastUpdatedDate(new Date());
54                     vapBatchPersonInfo.setStatus(TaskStatus.RUNNING);
55                     batchPersonList.add(vapBatchPersonInfo);
56                 
57             
58         
59         batchPersonInfoRepository.saveAll(batchPersonList);
60         
61     

View Code

第⑥个方法：parseImageFile方法是解析图片的方法

 1     private void parseImageFile(File file, String createdId, String uuid) throws Exception 
 2         
 3         String imgStr ="";
 4         FileInputStream fis = new FileInputStream(file);
 5         byte[] buffer = new byte[(int) file.length()]; 
 6         int offset = 0; 
 7         int numRead = 0; 
 8         while (offset < buffer.length && (numRead = fis.read(buffer, offset, buffer.length - offset)) >= 0) 
 9             offset += numRead;
10          
11         if (offset != buffer.length)  
12             throw new IOException("Could not completely read file " + file.getName()); 
13          
14         fis.close(); 
15         Base64 encoder = new Base64();
16         imgStr = Base64.encodeBase64String(buffer);
17         imgStr.length();
18         LogUtils.info("file name:"+file.getName());
19 //        LogUtils.info("file imgStr:"+imgStr);
20 //        LogUtils.info("file imgStr.length:"+imgStr.length());
21 
22     

View Code

 最后附上FileConfig和FileUtil的代码

FileConfig代码：

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

/**
 *Jun 12, 2019
 * 
 * FileConfig.java
 */
@ConfigurationProperties(prefix = "upload")
@Component
@Order
public class FileConfig 
    
    public static String localtion;    
    public static String maxFileSize;    
    public static String maxRequestSize;    

    /**
     * @param localtion the localtion to set
     */
    public void setLocaltion(String localtion) 
        FileConfig.localtion = localtion;
    

    /**
     * @param maxFileSize the maxFileSize to set
     */
    public void setMaxFileSize(String maxFileSize) 
        FileConfig.maxFileSize = maxFileSize;
    

    /**
     * @param maxRequestSize the maxRequestSize to set
     */
    public void setMaxRequestSize(String maxRequestSize) 
        FileConfig.maxRequestSize = maxRequestSize;
    
    
    

View Code

FileConfig类里面读取的配置文件信息：

配置文件类型是yml,大家也可以自己改成properties文件格式

upload: 
  #localtion: $UPLOAD_DIR:/home/data/test
  localtion: $UPLOAD_DIR:D:/test
  maxFileSize: 10240KB 
  maxRequestSize: 102400KB  

FileUtil类的代码：

  1 import java.io.*;
  2 import java.nio.channels.FileChannel;
  3 import java.nio.file.Files;
  4 import java.nio.file.Path;
  5 import java.nio.file.Paths;
  6 import java.nio.file.attribute.PosixFilePermission;
  7 import java.util.ArrayList;
  8 import java.util.Enumeration;
  9 import java.util.HashSet;
 10 import java.util.List;
 11 import java.util.Set;
 12 import java.util.zip.ZipEntry;
 13 import java.util.zip.ZipFile;
 14 
 15 import org.springframework.web.multipart.MultipartFile;
 16 
 17 import sg.com.mha.ummi.common.util.LogUtils;
 18 
 19 
 20 public class FileUtil 
 21     
 22     public static void clearFiles(String workspaceRootPath) 
 23         File file = new File(workspaceRootPath);
 24         deleteFile(file);
 25     
 26 
 27     public static void deleteFile(File file) 
 28         if (file.exists()) 
 29             if (file.isDirectory()) 
 30                 File[] files = file.listFiles();
 31                 for (int i = 0; i < files.length; i++) 
 32                     deleteFile(files[i]);
 33                 
 34             
 35         
 36         file.delete();
 37     
 38 
 39     public static void fileWrite(String str, String fileNamePath) throws IOException 
 40         FileWriter writer = null;
 41         try 
 42             File file = new File(fileNamePath);
 43             if (!file.getParentFile().exists()) 
 44                 file.getParentFile().mkdirs();
 45                 file.createNewFile();
 46             
 47             writer = new FileWriter(file, true);
 48             writer.write(str + System.getProperty("line.separator"));
 49 
 50          catch (IOException e) 
 51             LogUtils.error(e.getMessage());
 52          finally 
 53             if (writer != null) 
 54                 writer.close();
 55             
 56         
 57     
 58 
 59     public static void changePermission(File dirFile, int mode) throws IOException 
 60         char[] modes = Integer.toOctalString(mode).toCharArray();
 61         if (modes.length != 3) 
 62             return;
 63         
 64         Set<PosixFilePermission> perms = new HashSet<PosixFilePermission>();
 65         switch (modes[0]) 
 66             case ‘1‘:
 67                 perms.add(PosixFilePermission.OWNER_EXECUTE);
 68                 break;
 69             case ‘2‘:
 70                 perms.add(PosixFilePermission.OWNER_WRITE);
 71                 break;
 72             case ‘4‘:
 73                 perms.add(PosixFilePermission.OWNER_READ);
 74                 break;
 75             case ‘5‘:
 76                 perms.add(PosixFilePermission.OWNER_READ);
 77                 perms.add(PosixFilePermission.OWNER_EXECUTE);
 78                 break;
 79             case ‘6‘:
 80                 perms.add(PosixFilePermission.OWNER_READ);
 81                 perms.add(PosixFilePermission.OWNER_WRITE);
 82                 break;
 83             case ‘7‘:
 84                 perms.add(PosixFilePermission.OWNER_READ);
 85                 perms.add(PosixFilePermission.OWNER_WRITE);
 86                 perms.add(PosixFilePermission.OWNER_EXECUTE);
 87                 break;
 88 
 89             default:
 90                 break;
 91         
 92         switch (modes[1]) 
 93             case ‘1‘:
 94                 perms.add(PosixFilePermission.GROUP_EXECUTE);
 95                 break;
 96             case ‘2‘:
 97                 perms.add(PosixFilePermission.GROUP_WRITE);
 98                 break;
 99             case ‘4‘:
100                 perms.add(PosixFilePermission.GROUP_READ);
101                 break;
102             case ‘5‘:
103                 perms.add(PosixFilePermission.GROUP_READ);
104                 perms.add(PosixFilePermission.GROUP_EXECUTE);
105                 break;
106             case ‘6‘:
107                 perms.add(PosixFilePermission.GROUP_READ);
108                 perms.add(PosixFilePermission.GROUP_WRITE);
109                 break;
110             case ‘7‘:
111                 perms.add(PosixFilePermission.GROUP_READ);
112                 perms.add(PosixFilePermission.GROUP_WRITE);
113                 perms.add(PosixFilePermission.GROUP_EXECUTE);
114                 break;
115             default:
116                 break;
117         
118         switch (modes[2]) 
119             case ‘1‘:
120                 perms.add(PosixFilePermission.OTHERS_EXECUTE);
121                 break;
122             case ‘2‘:
123                 perms.add(PosixFilePermission.OTHERS_WRITE);
124                 break;
125             case ‘4‘:
126                 perms.add(PosixFilePermission.OTHERS_READ);
127                 break;
128             case ‘5‘:
129                 perms.add(PosixFilePermission.OTHERS_EXECUTE);
130                 perms.add(PosixFilePermission.OTHERS_READ);
131                 break;
132             case ‘6‘:
133                 perms.add(PosixFilePermission.OTHERS_READ);
134                 perms.add(PosixFilePermission.OTHERS_WRITE);
135                 break;
136             case ‘7‘:
137                 perms.add(PosixFilePermission.OTHERS_EXECUTE);
138                 perms.add(PosixFilePermission.OTHERS_READ);
139                 perms.add(PosixFilePermission.OTHERS_WRITE);
140                 break;
141             default:
142                 break;
143         
144 
145         try 
146             Path path = Paths.get(dirFile.getAbsolutePath());
147             Files.setPosixFilePermissions(path, perms);
148          catch (Exception e) 
149             e.printStackTrace();
150         
151     
152 
153     public static File mkFile(String fileName) 
154         File f = new File(fileName);
155         try 
156             if (f.exists()) 
157                 f.delete();
158             
159             f.createNewFile();
160          catch (IOException e) 
161             e.printStackTrace();
162         
163         return f;
164     
165 
166 
167     public static void copyDirAndFile(String oldPath, String newPath) throws IOException 
168         if (!(new File(newPath)).exists()) 
169             (new File(newPath)).mkdir();
170         
171         File file = new File(oldPath);
172         //file name list
173         String[] filePaths = file.list();
174         for (String filePath : filePaths) 
175             String oldFullPath = oldPath + file.separator + filePath;
176             String newFullPath = newPath + file.separator + filePath;
177             File oldFile = new File(oldFullPath);
178             File newFile = new File(newFullPath);
179             if (oldFile.isDirectory()) 
180                 copyDirAndFile(oldFullPath, newFullPath);
181              else if (oldFile.isFile()) 
182                 copyFile(oldFile, newFile);
183             
184         
185     
186 
187     public static void copyFile(File source, File dest) throws IOException 
188         FileChannel inputChannel = null;
189         FileChannel outputChannel = null;
190         try 
191             inputChannel = new FileInputStream(source).getChannel();
192             outputChannel = new FileOutputStream(dest).getChannel();
193             outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
194          finally 
195             inputChannel.close();
196             outputChannel.close();
197         
198     
199     
200     /**
201      * @author panchaoyuan
202      * @param srcFile    Unzipped file
203      * @param destDirPath   Unzipped destination folder
204      * @throws RuntimeException
205      * @throws IOException 
206      */
207     public static void unZip(MultipartFile  srcFile, String destDirPath,String savePath) throws RuntimeException, IOException 
208         long startTime = System.currentTimeMillis();
209         
210         File file = null;  
211         InputStream ins = srcFile.getInputStream();  
212         file=new File(savePath+srcFile.getOriginalFilename()); 
213         LogUtils.info("MultipartFile transform to File,MultipartFile name:"+srcFile.getOriginalFilename());
214         inputStreamToFile(ins, file);  
215         
216         if (!file.exists()) 
217             throw new RuntimeException(file.getPath() + ",file is not found");
218         
219         ZipFile zipFile = null;
220         try 
221             zipFile = new ZipFile(file);
222             Enumeration<?> entries = zipFile.entries();
223             while (entries.hasMoreElements()) 
224                 ZipEntry entry = (ZipEntry) entries.nextElement();
225                 LogUtils.info("zipFile context name:"+entry.getName());
226                 if (entry.isDirectory()) 
227                     String dirPath = destDirPath + File.separator+ entry.getName();
228                     File dir = new File(dirPath);
229                     dir.mkdirs();
230                 else 
231                     File targetFile = new File(destDirPath + File.separator + entry.getName());
232                     targetFile.setExecutable(true);
233                     if(!targetFile.getParentFile().exists())
234                         targetFile.getParentFile().mkdirs();
235                     
236                     targetFile.createNewFile();
237                     InputStream is = zipFile.getInputStream(entry);
238                     FileOutputStream fos = new FileOutputStream(targetFile);
239                     int len;
240                     byte[] buf = new byte[1024];
241                     while ((len = is.read(buf)) != -1) 
242                         fos.write(buf, 0, len);
243                     
244                     fos.close();
245                     is.close();
246                 
247             
248             long endTime = System.currentTimeMillis();
249             LogUtils.info("unZip time-->" + (endTime - startTime) + " ms");
250         catch(Exception e) 
251             throw new RuntimeException("unzip error from FileUtil", e);
252          finally 
253             if(zipFile != null)
254                 try 
255                     zipFile.close();
256                  catch (IOException e) 
257                     e.printStackTrace();
258                 
259             
260             
261             //MultipartFile change to file may create a temp file in the project root folder(delete the temp file)
262             File del = new File(file.toURI());  
263             del.delete(); 
264         
265     
266 
267     /**
268      * MultipartFile changed to File
269      * @author panchaoyuan
270      * @return 
271      */
272     private static void inputStreamToFile(InputStream ins, File file) 
273         try 
274             OutputStream os = new FileOutputStream(file);
275             int bytesRead = 0;
276             byte[] buffer = new byte[8192];
277             while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) 
278                 os.write(buffer, 0, bytesRead);
279             
280             os.close();
281             ins.close();
282             LogUtils.info("MultipartFile transform to File completed!");
283         catch(Exception e) 
284             e.printStackTrace();
285         
286     
287 
288       /**
289      * @author panchaoyuan
290      */
291     public List<File> getSubFiles(String  desFile,List<File> fileList) 
292         File file = new File(desFile);
293         File[] files = file.listFiles();
294         for (File fileIndex : files) 
295             if (!fileIndex.exists()) 
296                 throw new NullPointerException("Cannot find " + fileIndex);
297              else if (fileIndex.isFile()) 
298                 fileList.add(fileIndex);
299              else 
300                 if (fileIndex.isDirectory()) 
301                     getSubFiles(fileIndex.getAbsolutePath(),fileList);
302                 
303             
304         
305         return fileList;
306     
307     
308     
309 

View Code

 

水平有限，可能写得不是很完整，大家copy这些代码的时候有可能因为引入包的不同，不一定走得成功，如有疑问，在评论区联系本人，写得不好的地方也欢迎指正。