的Neo4j - Lucene的 - 行家遮陽插件 - 通過Netbeans的正常工作，但不工作的罐子

Question

我創建了一個Maven的Java應用程序來執行一些Neo4j的查詢。我有一個neo4j查詢正在執行的類，還有一個我使用Swing製作了一個gui，所以我可以使用一個按鈕來執行查詢並在textArea中顯示結果。一切工作正常，如果我在Netbeans中運行該項目，但是當我使用Maven樹蔭插件來創建此項目的一個胖罐子，發生了一些事情和neo4j命令不工作。我認爲問題出在lucene jar（來自apache文件夾和neo4j文件夾），所以我在pom.xml文件中使用了一些代碼來修復它，但沒有運氣。也許問題是因爲classpath中的類名衝突。

myJFrame.java

package com.mycompany.neo4jqueries; 

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Cursor; 
import java.awt.Dimension; 
import java.awt.FlowLayout; 
import java.awt.Font; 
import java.awt.Toolkit; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.beans.PropertyChangeEvent; 
import java.beans.PropertyChangeListener; 
import java.util.Date; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.swing.BorderFactory; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
import javax.swing.JComponent; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JProgressBar; 
import javax.swing.JScrollPane; 
import javax.swing.JTextArea; 
import javax.swing.SwingWorker; 

/** 
* 
* @author Dar309 
*/ 
public class myJFrame extends JPanel { 

    private JComboBox firstComboBox; 
    private JTextArea queryTextArea, resultTextArea, infoTextArea; 
    private String[] comboBoxItems, queryList; 
    private JButton executeButton; 
    private Font monosSpacedFont = new Font("monospaced", Font.PLAIN, 12); 
    private JProgressBar progressBar; 
    private Task myTask; 
    private long miliBeforeExec = 0, miliAfterExec = 0, execTime = 0; 

    public myJFrame() { 
     super(new BorderLayout()); 

     JPanel firstPanel = new JPanel(); 
     BorderLayout fpL = new BorderLayout(); 
     firstPanel.setLayout(fpL); 

     JPanel topPanel = new JPanel(); 
     topPanel.setLayout(new BorderLayout()); 

     JPanel topPanel1 = new JPanel(); 
     topPanel1.setLayout(new FlowLayout(FlowLayout.CENTER)); 

     comboBoxItems = new String[]{"1", 
      "The Top 10 Stack Overflow Users", 
      "The Top 5 tags That Jon Skeet Used in Asking Questions"}; 

     queryList = new String[]{"match (n) \nreturn head(labels(n)) as label, count(*)", 
      "match (u:User) \nwith u,size((u)-[:POSTED]->()) as posts order by posts desc limit 10 \nreturn u.name, posts", 
      "match (u:User)-[:POSTED]->()-[:HAS_TAG]->(t:Tag) \nwhere u.name = 'Jon Skeet' \nreturn t,count(*) as posts order by posts desc limit 5"}; 

     firstComboBox = new JComboBox(comboBoxItems); 

     firstComboBox.setSelectedIndex(0); 
     firstComboBox.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       queryTextArea.setText(queryList[firstComboBox.getSelectedIndex()]); 

      } 
     }); 

     topPanel1.add(firstComboBox); 

     JPanel topPanel2 = new JPanel(); 
     topPanel2.setLayout(new FlowLayout()); 

     queryTextArea = new JTextArea(); 
     queryTextArea.setText(queryList[0]); 
     queryTextArea.setFont(monosSpacedFont); 
     queryTextArea.setEditable(false); 

     JScrollPane queryScrollPane = new JScrollPane(queryTextArea); 
     queryScrollPane.setPreferredSize(new Dimension(450, 110)); 

     topPanel2.add(queryScrollPane); 

     JPanel topPanel3 = new JPanel(); 
     topPanel3.setLayout(new FlowLayout()); 

     progressBar = new JProgressBar(0, 100); 
     progressBar.setValue(0); 
     progressBar.setString("No progress yet"); 
     progressBar.setStringPainted(true); 

     executeButton = new JButton("Execute"); 
     executeButton.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       executeButton.setEnabled(false); 
       progressBar.setIndeterminate(true); 
       firstComboBox.setEnabled(false); 
       progressBar.setString("Loading..."); 
       setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)); 

       miliBeforeExec = System.currentTimeMillis(); 

       //Instances of javax.swing.SwingWorker are not reusuable, so 
       //we create new instances as needed. 
       myTask = new Task(); 
       myTask.addPropertyChangeListener(new PropertyChangeListener() { 
        @Override 
        public void propertyChange(PropertyChangeEvent evt) { 
         if ("progress" == evt.getPropertyName()) { 
//       int progress = (Integer) evt.getNewValue(); 
//       progressBar.setValue(progress); 
         } 
        } 
       }); 
       myTask.execute(); 
      } 
     }); 

     topPanel3.add(progressBar); 
     topPanel3.add(executeButton); 

     topPanel.add(topPanel1, BorderLayout.NORTH); 
     topPanel.add(topPanel2, BorderLayout.CENTER); 
     topPanel.add(topPanel3, BorderLayout.SOUTH); 

     firstPanel.add(topPanel, BorderLayout.NORTH); 

     JPanel resultPanel = new JPanel(); 
     resultPanel.setLayout(new BorderLayout()); 

     resultTextArea = new JTextArea(); 
     resultTextArea.setFont(monosSpacedFont); 
     resultTextArea.setText(""); 
     resultTextArea.setEditable(false); 

     JScrollPane centerScrollPane = new JScrollPane(resultTextArea); 
     centerScrollPane.setPreferredSize(new Dimension(550, 200)); 
     centerScrollPane.setBorder(BorderFactory.createEmptyBorder(5, 0, 10, 0)); 
     resultPanel.add(centerScrollPane, BorderLayout.CENTER); 

     infoTextArea = new JTextArea(); 
     infoTextArea.setRows(2); 
     infoTextArea.setFont(monosSpacedFont); 
     infoTextArea.setEditable(false); 

     resultPanel.add(infoTextArea, BorderLayout.SOUTH); 

     firstPanel.add(resultPanel, BorderLayout.CENTER); 

     add(firstPanel, BorderLayout.CENTER); 
     setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20)); 
    } 

    private static void createAndShowGUI() { 
     //Create and set up the window. 
     JFrame frame = new JFrame(); 
//  frame.setSize(650, 550); 
     frame.setSize(Toolkit.getDefaultToolkit().getScreenSize().width/2,Toolkit.getDefaultToolkit().getScreenSize().height/2); 
     frame.setMinimumSize(new Dimension(frame.getWidth(), frame.getHeight())); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setTitle("Execute your Neo4j queries"); 

     Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize(); 
     int x = (int) ((dimension.getWidth() - frame.getWidth())/2); 
     int y = (int) ((dimension.getHeight() - frame.getHeight())/2); 
     frame.setLocation(x, y); 

     //Create and set up the content pane. 
     JComponent newContentPane = new myJFrame(); 
     newContentPane.setOpaque(true); //content panes must be opaque 
     frame.setContentPane(newContentPane); 

     //Display the window. 
     frame.pack(); 
     frame.setVisible(true); 
    } 

    class Task extends SwingWorker<Void, Void> { 

     /* 
     * Main task. Executed in background thread. 
     */ 
     @Override 
     public Void doInBackground() { 
//   Random random = new Random(); 
//   int progress = 0; 
      //Initialize progress property. 
      setProgress(0); 

      System.out.println("popo"); 
      resultTextArea.append("popo"); 
      myQuery mq = new myQuery(); 
      mq.run(myJFrame.this); 
      resultTextArea.append("metaaaa"); 
      System.out.println("metaaa"); 

//   setProgress(Math.min(progress, 100)); 
      return null; 
     } 

     /* 
     * Executed in event dispatching thread 
     */ 
     @Override 
     public void done() { 
      Toolkit.getDefaultToolkit().beep(); 
      progressBar.setIndeterminate(false); 
      executeButton.setEnabled(true); 
      firstComboBox.setEnabled(true); 
//   resultTextArea.setCaretPosition(resultTextArea.getText().length()); 
      setCursor(null); //turn off the wait cursor 

      miliAfterExec = System.currentTimeMillis(); 
      execTime = miliAfterExec - miliBeforeExec; 
//   execTime += 11140000; 

      if (execTime < 60 * 1000) { 
       infoTextArea.setText("Total time: " + (double) (execTime/1000.000) + "s"); 
      }   
//   else if(execTime >= (60 * 1000) && execTime < (3600 * 1000)){ 
      else if (execTime >= (60 * 1000)) { 
       long temp = execTime; 
       for (long i = 0; i < execTime/(60 * 1000); i++) { 
        temp -= (60 * 1000); 
       } 
       infoTextArea.setText("Total time: " + (execTime/(60 * 1000)) + ":" + (double) (temp/1000.000) + "s"); 
      } 
      Date date = new Date(); 
      infoTextArea.append("\nFinished at: " + date.toString()); 

      progressBar.setString("Done!"); 
     } 
    } 

    public static void main(String[] args) { 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       createAndShowGUI(); 
      } 
     }); 
    } 

    public JTextArea getResultTextArea() { 
     return resultTextArea; 
    } 

    public JTextArea getQueryTextArea() { 
     return queryTextArea; 
    } 

} 

myQuery.java

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 
package com.mycompany.neo4jqueries; 

import java.io.File; 
import java.io.IOException; 
import java.io.PrintWriter; 
import java.util.Iterator; 
import java.util.List; 
import java.util.Map; 
import java.util.Map.Entry; 
import javax.swing.JFrame; 

import org.neo4j.graphdb.GraphDatabaseService; 
import org.neo4j.graphdb.Node; 
import org.neo4j.graphdb.Result; 
import org.neo4j.graphdb.Transaction; 
import org.neo4j.graphdb.factory.GraphDatabaseFactory; 
import org.neo4j.helpers.collection.Iterators; 

/** 
* 
* @author Dar309 
*/ 
public class myQuery { 

    private static final File DB_PATH = new File("D:/IU/Διπλωματική/neo4j-community-3.1.2/data/databases/graph.db"); 
    String resultString; 
    String columnsString; 
    String nodeResult; 
    String rows = ""; 


    void run(myJFrame myFrame) { 
     GraphDatabaseService db = new GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH); 

     myFrame.getResultTextArea().append("sdadsdsadsads"); 
     System.out.println("naiiiii"); 
     try (Transaction ignored = db.beginTx(); 
//    Result result = db.execute("match (u:User) with u,size((u)-[:POSTED]->()) as posts order by posts desc limit 10 return u.name, posts")) { 
       Result result = db.execute(myFrame.getQueryTextArea().getText())) { 

      // START SNIPPET: columns 
      List<String> columns = result.columns(); 
      // END SNIPPET: columns 

      columnsString = columns.toString(); 
//   resultString = db.execute("match (u:User) with u,size((u)-[:POSTED]->()) as posts order by posts desc limit 10 return u.name, posts").resultAsString(); 
      resultString = result.resultAsString(); 
      System.out.println("\n\ncolumnsString\n------------------------------------------"); 
      System.out.println(columnsString); 

      System.out.println("\n\nresultString\n------------------------------------------"); 
      System.out.println(resultString); 
      myFrame.getResultTextArea().append(resultString); 

      try { 
       PrintWriter writer = new PrintWriter("the-file-name.txt", "UTF-8"); 
       writer.print(resultString); 
       writer.close(); 
      } catch (IOException e) { 
       // do something 
      } 
     } 

     db.shutdown(); 
    } 

} 

的pom.xml

<?xml version="1.0" encoding="UTF-8"?> 
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>com.mycompany</groupId> 
    <artifactId>Neo4jQueries</artifactId> 
    <version>1.0-SNAPSHOT</version> 
    <packaging>jar</packaging> 
    <properties> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
     <maven.compiler.source>1.8</maven.compiler.source> 
     <maven.compiler.target>1.8</maven.compiler.target> 
    </properties> 
    <dependencies> 
     <dependency> 
      <groupId>org.neo4j</groupId> 
      <artifactId>neo4j</artifactId> 
      <version>3.1.2</version> 
     </dependency> 
    </dependencies> 
    <name>neo4jQueries</name> 

    <build> 
     <plugins> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-shade-plugin</artifactId> 
       <version>3.0.0</version> 
       <executions> 
        <execution> 
         <phase>package</phase> 
         <goals> 
          <goal>shade</goal> 
         </goals> 
         <configuration> 
          <shadedArtifactAttached>true</shadedArtifactAttached> 
          <shadedClassifierName>shaded</shadedClassifierName> 
          <createDependencyReducedPom>false</createDependencyReducedPom> 
          <relocations> 
           <relocation> 
            <pattern>org.apache.lucene</pattern> 
            <shadedPattern>shaded_lucene_5_5_0.org.apache.lucene</shadedPattern> 
           </relocation> 
           <relocation> 
            <pattern>org.neo4j</pattern> 
            <shadedPattern>shaded_neo4j.org.neo4j</shadedPattern> 
           </relocation> 
          </relocations> 
          <transformers> 
           <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> 
            <mainClass>com.mycompany.neo4jqueries.myJFrame</mainClass> 
           </transformer> 
          </transformers> 
         </configuration> 
        </execution> 
       </executions> 
      </plugin> 
     </plugins> 
    </build> 

    <repositories> 
     <repository> 
      <id>neo4j-repo</id> 
      <name>Neo4j Repository</name> 
      <url>http://m2.neo4j.org/content/repositories/releases</url> 
     </repository> 
    </repositories> 

</project> 

當我雙擊罐子，我看到GUI和一切工作正常，直到調用myQuery類，然後沒有執行neo4j命令，但沒有顯示錯誤消息。

有誰可以幫我解決這個問題嗎？

Answer 1

你的程序的硬編碼路徑到Neo4j的DB。

所以，如果你沒有運行在其上開發的代碼在同一臺機器上的jar文件，它不會是能夠找到數據庫，並會拋出異常。

然而，作爲InvokeLater的醫生說，如果Runnable你給它：

拋出一個未捕獲的異常事件調度線程將放鬆 （不是當前線程）

這意味着你的線程永遠不會看到任何未捕獲的異常，除非你明確地告訴Swing使用你提供的異常處理程序。請參閱this question及其2個頂級得分答案（取決於您使用的是哪個版本的Java）。