GetFiles()怎样读取多种格式文件？

Posted 2023-04-24

System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(fileName);
System.IO.FileInfo[] fimore = di.GetFiles("*.jpg");
foreach (System.IO.FileInfo fi in fimore)

alist.Add(fi.Name);
max++;

ShowPic(alist[0].ToString());

我要可以读取 *.png *.jpg *.bmp 多种格式图片。GetFiles（）怎么写。具体语法。谢谢各位!

　　由于 getfiles() 一次只能获到一种类型的文件，所以只能先获取到指定目录下的所有文件，再循环判断每个文件是否是要获

取的文件；假如获取指定目录下的所有视频文件，实现代码如下：
　　/// <summary>
　　/// C#获取指定目录下多种指定类型文件
　　/// </summary>
　　/// <param name="filePath">路径</param>
　　private void GetVideoFiles(string filePath)
　　
　　　　DirectoryInfo di = new DirectoryInfo(filePath);
　　　　FileInfo[] afi = di.GetFiles("*.*");
　　　　string fileName;
　　　　IList<string> list = new List<string>();
　　for (int i = 0; i < afi.Length; i++)
　　　　
　　　　　　fileName = afi[i].Name.ToLower();
　　　　　　if (fileName.EndsWith(".rmvb") || fileName.EndsWith(".rm") || fileName.EndsWith(".avi") ||

fileName.EndsWith(".mp4"))
　　　　　　
　　　　　　　　list.Add(fileName);
　　　　　　
　　　　
　　
　　如果不同类型的文件要求不同的操作，把并列的条件改 if() else if() 或 switch 语句即可。
　　调用方法：GetVideoFiles(@"G:\\xq\\test"); 参考技术A 读取图片不用那么麻烦
Image a=Image.FromFile(@"C:\a.jpg");
可以结合OpenFileDialog，和imaglist使用
简单方便快捷本回答被提问者采纳 参考技术B string[] ext="png","jpg","bmp";
System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(fileName);
System.IO.FileInfo[] fimore = di.GetFiles("*.jpg");
foreach (System.IO.FileInfo fi in fimore)

foreach(string ex in ext)

if (ex == fi.Extension.ToLower())

alist.Add(fi.Name);
max++;



ShowPic(alist[0].ToString());

用java读取多种文件格式的文件（pdf,pptx,ppt,doc,docx..)

　　　本文通过开源pdfbox和poi进行处理多种文件格式的文本读入

　1.需要的jar的maven坐标：

     <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.2</version>
        </dependency>
        <!--  ppt,xls,docx,pptx,xlsx-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.14</version>
        </dependency>
        <dependency>
            <groupId>org.apache.xmlbeans</groupId>
            <artifactId>xmlbeans</artifactId>
            <version>2.6.0</version>
        </dependency>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>
    

 

 处理多种文件格式，详情见代码：

  1 package cn.lcg.utils;
  2 
  3 import java.io.File;
  4 import java.io.FileInputStream;
  5 import java.io.IOException;
  6 import java.text.NumberFormat;
  7 import java.util.List;
  8 
  9 import org.apache.pdfbox.pdmodel.PDDocument;
 10 import org.apache.pdfbox.text.PDFTextStripper;
 11 import org.apache.poi.hslf.extractor.PowerPointExtractor;
 12 import org.apache.poi.hssf.usermodel.HSSFCell;
 13 import org.apache.poi.hssf.usermodel.HSSFRow;
 14 import org.apache.poi.hssf.usermodel.HSSFSheet;
 15 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 16 import org.apache.poi.hwpf.HWPFDocument;
 17 import org.apache.poi.hwpf.usermodel.Range;
 18 import org.apache.poi.ss.usermodel.Cell;
 19 import org.apache.poi.xslf.usermodel.XMLSlideShow;
 20 import org.apache.poi.xslf.usermodel.XSLFSlide;
 21 import org.apache.poi.xslf.usermodel.XSLFSlideShow;
 22 import org.apache.poi.xssf.usermodel.XSSFCell;
 23 import org.apache.poi.xssf.usermodel.XSSFRow;
 24 import org.apache.poi.xssf.usermodel.XSSFSheet;
 25 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 26 import org.apache.poi.xwpf.extractor.XWPFWordExtractor;
 27 import org.apache.poi.xwpf.usermodel.XWPFDocument;
 28 import org.openxmlformats.schemas.drawingml.x2006.main.CTRegularTextRun;
 29 import org.openxmlformats.schemas.drawingml.x2006.main.CTTextBody;
 30 import org.openxmlformats.schemas.drawingml.x2006.main.CTTextParagraph;
 31 import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShape;
 32 import org.openxmlformats.schemas.presentationml.x2006.main.CTShape;
 33 import org.openxmlformats.schemas.presentationml.x2006.main.CTSlide;
 34 
 35 /**
 36  * 
 37  * @author yujian
 38  * @date   2016年10月12日
 39  * @version 0.0.1
 40  */
 41 public class FileFormat {
 42     /**
 43      * 用来读取doc文件的方法
 44      * @param filePath
 45      * @return
 46      * @throws Exception
 47      */
 48     public static String getTextFromDoc(String filePath) throws Exception{
 49         StringBuilder sb = new StringBuilder();
 50             FileInputStream fis = new FileInputStream(new File(filePath));
 51             HWPFDocument doc = new HWPFDocument(fis);
 52             Range rang = doc.getRange();
 53             sb.append(rang.text());    
 54             fis.close();
 55             return sb.toString();
 56         
 57     }
 58     /**
 59      * 用来读取docx文件
 60      * @param filePath
 61      * @return
 62      * @throws IOException 
 63      * @throws Exception
 64      */
 65     @SuppressWarnings("resource")
 66     public static String getTextFromDocx(String filePath) throws IOException {
 67         FileInputStream in = new FileInputStream(filePath);
 68         XWPFDocument doc = new XWPFDocument(in);
 69         XWPFWordExtractor extractor = new XWPFWordExtractor(doc);
 70         String text = extractor.getText();
 71         in.close();
 72         return text;
 73     }
 74     /**
 75      * 用来读取pdf文件
 76      * @param filePath
 77      * @return
 78      * @throws IOException
 79      */
 80     public static String getTextFromPDF(String filePath) throws IOException{
 81             File input = new File(filePath);
 82             PDDocument pd = PDDocument.load(input);
 83             PDFTextStripper stripper = new PDFTextStripper();
 84             return stripper.getText(pd);
 85     }
 86     /**
 87      * 用来读取ppt文件
 88      * @param filePath
 89      * @return
 90      * @throws IOException
 91      */
 92     public static String getTextFromPPT( String filePath) throws IOException{
 93         FileInputStream in = new FileInputStream(filePath);
 94         PowerPointExtractor extractor = new PowerPointExtractor(in);
 95         String content = extractor.getText();
 96         extractor.close();
 97         return content;
 98     }
 99     /**
100      * 用来读取pptx文件
101      * @param filePath
102      * @return
103      * @throws IOException
104      */
105     public static String getTextFromPPTX( String filePath) throws IOException{
106         String resultString = null;
107         StringBuilder sb = new StringBuilder();
108         FileInputStream in = new FileInputStream(filePath);
109         try {
110             XMLSlideShow xmlSlideShow = new XMLSlideShow(in);
111             List<XSLFSlide> slides = xmlSlideShow.getSlides();
112             for(XSLFSlide slide:slides){
113                 CTSlide rawSlide = slide.getXmlObject();
114                 CTGroupShape gs = rawSlide.getCSld().getSpTree();
115                 CTShape[] shapes = gs.getSpArray();
116                 for(CTShape shape:shapes){
117                     CTTextBody tb = shape.getTxBody();
118                     if(null==tb){
119                         continue;
120                     }
121                     CTTextParagraph[] paras = tb.getPArray();
122                     for(CTTextParagraph textParagraph:paras){
123                         CTRegularTextRun[] textRuns = textParagraph.getRArray();
124                         for(CTRegularTextRun textRun:textRuns){
125                             sb.append(textRun.getT());
126                         }
127                     }
128                 }
129             }
130             resultString = sb.toString();
131             xmlSlideShow.close();
132         } catch (Exception e) {
133             e.printStackTrace();
134         }
135         return resultString;
136     }
137     /**
138      * 用来读取xls
139      * @param filePath
140      * @return
141      * @throws IOException
142      */
143     public static String getTextFromxls(String filePath) throws IOException{
144         FileInputStream in = new FileInputStream(filePath);
145         StringBuilder content = new StringBuilder();
146         HSSFWorkbook workbook = new HSSFWorkbook(in);
147         for(int sheetIndex=0;sheetIndex<workbook.getNumberOfSheets();sheetIndex++){
148             HSSFSheet sheet = workbook.getSheetAt(sheetIndex);
149             for(int rowIndex=0;rowIndex<=sheet.getLastRowNum();rowIndex++){
150                 HSSFRow row = sheet.getRow(rowIndex);
151                 if(row==null){
152                     continue;
153                 }
154                 for(int cellnum=0;cellnum<row.getLastCellNum();cellnum++){
155                     HSSFCell cell = row.getCell(cellnum);
156                     if(cell!=null){
157                         content.append(cell.getRichStringCellValue().getString()+" ");
158                     }
159                         
160                 }
161             }
162             
163         }
164         workbook.close();
165         return content.toString();
166         
167     }
168     /**
169      * 用来读取xlsx文件
170      * @param filePath
171      * @return
172      * @throws IOException
173      */
174     public static String getTextFromxlsx(String filePath) throws IOException{
175         StringBuilder content = new StringBuilder();
176         XSSFWorkbook workbook = new XSSFWorkbook(filePath);
177         for(int sheet=0;sheet<workbook.getNumberOfSheets();sheet++){
178             if(null!=workbook.getSheetAt(sheet)){
179                 XSSFSheet aSheet =workbook.getSheetAt(sheet);
180                 for(int row=0;row<=aSheet.getLastRowNum();row++){
181                     if(null!=aSheet.getRow(row)){
182                         XSSFRow aRow = aSheet.getRow(row);
183                         for(int cell=0;cell<aRow.getLastCellNum();cell++){
184                             if(null!=aRow.getCell(cell)){
185                                 XSSFCell aCell = aRow.getCell(cell);
186                                 if(convertCell(aCell).length()>0){
187                                     content.append(convertCell(aCell));
188                                 }
189                             }
190                             content.append(" ");
191                         }
192                     }
193                 }
194             }
195         }
196         workbook.close();
197         return content.toString();
198         
199     }
200     
201     private static String convertCell(Cell cell){
202         NumberFormat formater = NumberFormat.getInstance();
203         formater.setGroupingUsed(false);
204         String cellValue="";
205         if(cell==null){
206             return cellValue;
207         }
208         
209         switch(cell.getCellType()){
210             case HSSFCell.CELL_TYPE_NUMERIC:
211                 cellValue = formater.format(cell.getNumericCellValue());
212                 break;
213             case HSSFCell.CELL_TYPE_STRING:
214                 cellValue = cell.getStringCellValue();
215                 break;
216             case HSSFCell.CELL_TYPE_BLANK:
217                 cellValue = cell.getStringCellValue();
218                 break;
219             case HSSFCell.CELL_TYPE_BOOLEAN:
220                 cellValue = Boolean.valueOf(cell.getBooleanCellValue()).toString();
221                 break;
222             case HSSFCell.CELL_TYPE_ERROR:
223                 cellValue = String.valueOf(cell.getErrorCellValue());
224                 break;
225             default:cellValue="";
226         }
227         return cellValue.trim();
228     }
229 }

 

 解释的话就没有那么多时间，这些代码在我的项目中完全正确，所以你们可以放心使用。