如何在Java项目中使用OCR tesseract实现一个图文识别功能

package com.zhy.test;  import java.io.BufferedReader;  import java.io.File; import java.io.FileInputStream; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List;  import org.jdesktop.swingx.util.OS;  public class OCRHelper {  private final String LANG_OPTION = "-l";  private final String EOL = System.getProperty("line.separator");    private String tessPath = new File("tesseract").getAbsolutePath();     public String recognizeText(File imageFile) throws Exception  {      File outputFile = new File(imageFile.getParentFile(), "output");    StringBuffer strB = new StringBuffer();   List<String> cmd = new ArrayList<String>();   if (OS.isWindowsXP())   {    cmd.add(tessPath + "\\tesseract");   } else if (OS.isLinux())   {    cmd.add("tesseract");   } else   {    cmd.add(tessPath + "\\tesseract");   }   cmd.add("");   cmd.add(outputFile.getName());   cmd.add(LANG_OPTION); //  cmd.add("chi_sim");   cmd.add("eng");    ProcessBuilder pb = new ProcessBuilder();      pb.directory(imageFile.getParentFile());   cmd.set(1, imageFile.getName());   pb.command(cmd);   pb.redirectErrorStream(true);   Process process = pb.start();   // tesseract.exe 1.jpg 1 -l chi_sim   // Runtime.getRuntime().exec("tesseract.exe 1.jpg 1 -l chi_sim");    //  System.out.println(cmd.toString());   int w = process.waitFor();   if (w == 0)// 0代表正常退出   {    BufferedReader in = new BufferedReader(new InputStreamReader(      new FileInputStream(outputFile.getAbsolutePath() + ".txt"),      "UTF-8"));    String str;     while ((str = in.readLine()) != null)    {     strB.append(str).append(EOL);    }    in.close();   } else   {    String msg;    switch (w)    {    case 1:     msg = "Errors accessing files. There may be spaces in your image's filename.";     break;    case 29:     msg = "Cannot recognize the image or its selected region.";     break;    case 31:     msg = "Unsupported image format.";     break;    default:     msg = "Errors occurred.";    }    throw new RuntimeException(msg);   }   new File(outputFile.getAbsolutePath() + ".txt").delete();   return strB.toString().replaceAll("\\s*", "");  } }