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我试图实现一个简单的接口，以便在我的数据库中进行尽可能多的查询但是我不知道该怎么做。该界面有一个按钮，每次单击它时，我都希望在我的数据库上执行查询并将结果返回到我的 JTextArea

在工作代码下方

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.border.EmptyBorder;

import org.neo4j.cypher.javacompat.ExecutionEngine; 
import org.neo4j.cypher.javacompat.ExecutionResult;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
import org.neo4j.helpers.collection.IteratorUtil;

import static org.neo4j.kernel.impl.util.FileUtils.deleteRecursively;

public class Frame extends JFrame {

public static final String DB_PATH = "/Volumes/iTanioHD/Users/tanio/Desktop/ciao";

GraphDatabaseService BORO_DB;

private JPanel contentPane;


public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                Frame frame = new Frame();
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}


    public Frame() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 794, 653);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    contentPane.setLayout(null);
    setContentPane(contentPane);


            final JTextArea queryTextArea = new JTextArea();
            queryTextArea.setBounds(25, 40, 702, 279);
            queryTextArea.setBorder(new EmptyBorder(5, 5, 5, 5));
            queryTextArea.setText("start n=node(*) where n.name! = 'my node' return n, n.name");
            contentPane.add(queryTextArea);

            JLabel cypherQueryLabel = new JLabel("Cypher Query");
            cypherQueryLabel.setBounds(25, 12, 105, 23);
            contentPane.add(cypherQueryLabel);

            final JTextArea resultTextArea = new JTextArea();
            resultTextArea.setBounds(25, 351, 702, 171);
            resultTextArea.setEditable(false);
            resultTextArea.setBorder(new EmptyBorder(5, 5, 5, 5));
            contentPane.add(resultTextArea);

            JLabel resultLabel = new JLabel("Result:");
            resultLabel.setBounds(25, 323, 55, 23);

            contentPane.add(resultLabel);

            JButton btnNewButton_2 = new JButton("Execute Query");
            btnNewButton_2.setBounds(274, 540, 176, 41);
            btnNewButton_2.setVisible(true);
            contentPane.add(btnNewButton_2);

            final GraphDatabaseService db = new GraphDatabaseFactory().newEmbeddedDatabase( DB_PATH );

            Neo4jEngine neo4jDB = new Neo4jEngine();
            neo4jDB.createBOROGraphOntology(db);

            btnNewButton_2.addActionListener(new ActionListener() {

                public void actionPerformed(ActionEvent e) {
                    String resultString;


                    ExecutionEngine engine = new ExecutionEngine( db );

                    ExecutionResult result = engine.execute(queryTextArea.getText());
                    resultString =result.dumpToString();

                    resultTextArea.setText(resultString);



                }
            }); 

}

}
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1 回答 1

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尝试这个：

import org.neo4j.cypher.javacompat.ExecutionEngine;
import org.neo4j.cypher.javacompat.ExecutionResult;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
import org.neo4j.kernel.impl.util.FileUtils;

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;

public class Frame extends JFrame {

    public static final String DB_PATH = "/Volumes/iTanioHD/Users/tanio/Desktop/ciao";

    private static GraphDatabaseService db;

    private JPanel contentPane;


    public static void main(String[] args) {
        db = new GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH);
        registerShutdownHook(db);

        Transaction tx = db.beginTx();
        try {
            db.getNodeById(0).setProperty("name", "Name 0");
            db.createNode().setProperty("name", "Name 1");
            db.createNode().setProperty("name", "Name 2");
            tx.success();
        } finally {
            tx.finish();
        }

        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Frame frame = new Frame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    private static void registerShutdownHook(final GraphDatabaseService graphDb) {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                graphDb.shutdown();
                try {
                    FileUtils.deleteRecursively(new File(DB_PATH));
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });
    }


    public Frame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 794, 653);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(null);
        setContentPane(contentPane);


        final JTextArea queryTextArea = new JTextArea();
        queryTextArea.setBounds(25, 40, 702, 279);
        queryTextArea.setBorder(new EmptyBorder(5, 5, 5, 5));
        queryTextArea.setText("start n=node(*) return n, n.name");
        contentPane.add(queryTextArea);

        JLabel cypherQueryLabel = new JLabel("Cypher Query");
        cypherQueryLabel.setBounds(25, 12, 105, 23);
        contentPane.add(cypherQueryLabel);

        final JTextArea resultTextArea = new JTextArea();
        resultTextArea.setBounds(25, 351, 702, 171);
        resultTextArea.setEditable(false);
        resultTextArea.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.add(resultTextArea);

        JLabel resultLabel = new JLabel("Result:");
        resultLabel.setBounds(25, 323, 55, 23);

        contentPane.add(resultLabel);

        JButton btnNewButton_2 = new JButton("Execute Query");
        btnNewButton_2.setBounds(274, 540, 176, 41);
        btnNewButton_2.setVisible(true);
        contentPane.add(btnNewButton_2);

        btnNewButton_2.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                ExecutionEngine engine = new ExecutionEngine(db);
                ExecutionResult result = engine.execute(queryTextArea.getText());
                resultTextArea.setText(result.dumpToString());
            }
        });
    }
}
于 2013-08-28T11:48:13.767 回答