java读取各类型的文件。

用到以下几个包。

bcmail-jdk14-132.jar

bcprov-jdk14-132.jar

checkstyle-all-4.2.jar

FontBox-0.1.0-dev.jar

lucene-core-2.0.0.jar

PDFBox-0.7.3.jar

poi-3.0-alpha3-20061212.jar

poi-contrib-3.0-alpha3-20061212.jar

poi-scratchpad-3.0-alpha3-20061212.jar

代码示例：

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import org.apache.poi.hslf.HSLFSlideShow;
import org.apache.poi.hslf.model.Slide;
import org.apache.poi.hslf.model.TextRun;
import org.apache.poi.hslf.usermodel.SlideShow;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.usermodel.Paragraph;
import org.apache.poi.hwpf.usermodel.Range;
import org.pdfbox.pdfparser.PDFParser;
import org.pdfbox.util.PDFTextStripper;

public class Test {

/**
* @param args
*/
public static void p(Object obj) {
System.out.println(obj);
}

public static void main(String[] args) {

try {
p(readPpt("src/1.dps"));
} catch (Exception e) {
e.printStackTrace();
}

}
//读取ppt
public static String readPpt(String path) throws Exception {

StringBuffer content = new StringBuffer("");
try {
SlideShow ss = new SlideShow(new HSLFSlideShow(path));// path为文件的全路径名称，建立SlideShow
Slide[] slides = ss.getSlides();// 获得每一张幻灯片
for (int i = 0; i < slides.length; i++) {
TextRun[] t = slides[i].getTextRuns();// 为了取得幻灯片的文字内容，建立TextRun
for (int j = 0; j < t.length; j++) {
content.append(t[j].getText());// 这里会将文字内容加到content中去
}
content.append(slides[i].getTitle());
}
} catch (Exception ex) {
System.out.println(ex.toString());
}
return content.toString().trim();

}
// 读取xls
public static String readXls(String path) throws Exception {
StringBuffer content = new StringBuffer("");// 文档内容
HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(path));
int sheetCount = workbook.getNumberOfSheets();// excel几张表
for (int i = 0; i < sheetCount; i++) {// 遍历excel表
HSSFSheet sheet = workbook.getSheetAt(i);// 对excel的第一个表引用
int rowCount = sheet.getLastRowNum();// 取得最后一行的下标
for (int j = 0; j < rowCount; j++) {// 循环每一行
HSSFRow row = sheet.getRow(j);// 引用行
if (row == null) {
continue;
} else {
short cellNum = row.getLastCellNum();
for (short m = 0; m < cellNum; m++) {
HSSFCell cell = row.getCell(m);// 引用行中的一个单元格
if (cell != null) {
int cellType = cell.getCellType();
// CELL_TYPE_NUMERIC 0 数字
// CELL_TYPE_STRING 1 字符串
// CELL_TYPE_FORMULA 2 公式
// CELL_TYPE_BLANK 3 空格
// CELL_TYPE_BOOLEAN 4 布尔值
// CELL_TYPE_ERROR 5 错误
switch (cellType) {
// 单元格类型为数字
case HSSFCell.CELL_TYPE_NUMERIC:
// 取数字单元格的值
double d = cell.getNumericCellValue();
content.append(String.valueOf(d) + "   ");
break;
// 单元格类型为字符串
case HSSFCell.CELL_TYPE_STRING:
String str = cell.getStringCellValue().trim();
if (!"".equals(str)) {
content.append(str + "   ");
}
         break;
// 单元格类型为公式
case HSSFCell.CELL_TYPE_FORMULA:
// 不读取公式
// String formula = cell.getCellFormula();
// content = content + formula+" ";
break;
// 单元格类型为空白
case HSSFCell.CELL_TYPE_BLANK:
break;
// 单元格类型为布尔值
case HSSFCell.CELL_TYPE_BOOLEAN:
// boolean bool = cell.getBooleanCellValue();
// content = content + bool+" ";
break;
// 单元格类型为错误
case HSSFCell.CELL_TYPE_ERROR:
// byte errorCode = cell.getErrorCellValue();
// content = content + errorCode+" ";
break;
default:
break;
        }
       } else {
        // content = content + "..." +" ";//没有数据的单元格使用...填充
       }
      }
     }
     content.append("\r");
    }
   }
return content.toString().trim();
}

// 读取pdf
public static String readPdf(String path) throws Exception {
   StringBuffer content = new StringBuffer("");// 文档内容
FileInputStream fis = new FileInputStream(path);
PDFParser p = new PDFParser(fis);
p.parse();
PDFTextStripper ts = new PDFTextStripper();
content.append(ts.getText(p.getPDDocument()));
fis.close();
return content.toString().trim();
}

// 读取word,只能读取文本内容 图片不行
public static String readWord(String path) throws Exception {

StringBuffer content = new StringBuffer("");// 文档内容
HWPFDocument doc = new HWPFDocument(new FileInputStream(path));
Range range = doc.getRange();
int paragraphCount = range.numParagraphs();// 段落
for (int i = 0; i < paragraphCount; i++) {// 遍历段落读取数据
Paragraph pp = range.getParagraph(i);
content.append(pp.text());
}
return content.toString().trim();
}

// 读取text
public static String readTxt(String path) {
StringBuffer content = new StringBuffer("");// 文档内容
try {
FileReader reader = new FileReader(path);
BufferedReader br = new BufferedReader(reader);
String s1 = null;

while ((s1 = br.readLine()) != null) {
content.append(s1 + "\r");
}
br.close();
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
return content.toString().trim();
}

}

转载：http://www.cnblogs.com/candl/p/3592649.html