代碼一：packagecom.main.service;importjava.io.File;importjava.io.FileInputStream;importjava.io.FileNotFoundException;importorg.dom4j.Document;importorg.dom4j.DocumentException;importorg.dom4j.Element;importorg.dom4j.io.SAXReader;importjava.io.PrintWriter;publicclassReadData{publicstaticvoidmain(String[]args){try{testSaxReader("person");System.out.println("---------");testSaxReader("隸屬度");}catch(Exceptione){e.printStackTrace();}}publicstaticvoidtestSaxReader(Stringitem)throwsDocumentException,FileNotFoundException{SAXReadersaxReader=newSAXReader();System.out.println("工程路徑："+System.getProperty("user.dir"));//問題所在FileInputStreamfile=newFileInputStream("src/0625.xml");Documentdoc=saxReader.read(file);Elementmenu=doc.getRootElement();System.out.println(menu.getName());org.dom4j.Nodeperson=menu.selectSingleNode("/Menu//Item[@Title='"+item+"']");StringnodeValue=person.getText();System.out.println(nodeValue);Filefp=newFile("./data/"+item+".txt");PrintWriterpfp=newPrintWriter(fp);pfp.print(nodeValue);pfp.close();}}代碼一有main方法,System.out.println("工程路徑："+System.getProperty("user.dir"));打印出來的結果是工程路徑：E:\workspace\outer\javaConnectR，是我項目的路徑。代碼二：packagecom.main.service;importjava.awt.Graphics;importjava.awt.GraphicsConfiguration;importjava.awt.GraphicsDevice;importjava.awt.GraphicsEnvironment;importjava.awt.HeadlessException;importjava.awt.Image;importjava.awt.MediaTracker;importjava.awt.Toolkit;importjava.awt.Transparency;importjava.awt.image.BufferedImage;importjava.io.File;importjava.io.IOException;importjavax.imageio.ImageIO;importjavax.swing.ImageIcon;importjavax.swing.JFrame;importorg.rosuda.REngine.REXP;importorg.rosuda.REngine.Rserve.RConnection;importcom.main.util.Rservel;publicclassExecuteextendsJFrame{privatestaticfinallongserialVersionUID=1L;staticImageimg;publicREXPgetRobj()throwsException{System.out.println("getRobj()");RConnectionc=Rservel.getRConnection();c.eval("library(RColorBrewer)");c.eval("H