Question

当我在这两个表之间编写连接查询时，我在两个表之间有多个ToMany关系，加载项目时出错。

以下是查询：

@NamedQueries ({
@NamedQuery(name = "LicenseComponentDefinition.findByProductVerKeyType", query = "SELECT c from LicenseComponentDefinition c join c.licenseKeyTypes lkt WHERE lkt.keyTypeId = :keyTypeId AND WHERE c.product.productId = :productID AND c.productVersionByVersionStartId.versionId <= :versionId AND c.productVersionByVersionEndId.versionId >= :versionId")

}）

实体类如下所示

private Set<LicenseKeyType> licenseKeyTypes = new HashSet<LicenseKeyType>(0);
@ManyToMany(fetch = FetchType.LAZY)
@JoinTable(name = "component_definition_keytypes", catalog = "ldbredesigned", joinColumns = {
        @JoinColumn(name = "component_definition_id", nullable = false, updatable = false) }, inverseJoinColumns = {
                @JoinColumn(name = "license_key_type_id", nullable = false, updatable = false) })
public Set<LicenseKeyType> getLicenseKeyTypes() {
    return this.licenseKeyTypes;
}

从查询中删除join子句时，它工作正常。如下所示

SELECT c from LicenseComponentDefinition c WHERE c.product.productId = :productID AND c.productVersionByVersionStartId.versionId <= :versionId AND c.productVersionByVersionEndId.versionId >= :versionId

有人可以帮忙吗？感谢。

Answer 1

您的命名查询中包含2个WHERE关键字：

package com.ggl.sudoku.solver.controller;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.swing.JPanel;

import com.ggl.sudoku.solver.view.SudokuFrame;

public class PrintActionListener implements Runnable {

    private SudokuFrame frame;

    public PrintActionListener(SudokuFrame frame) {
        this.frame = frame;
    }

    @Override
    public void run() {
        final BufferedImage image = createPanelImage();

        PrinterJob printJob = PrinterJob.getPrinterJob();
        printJob.setPrintable(new ImagePrintable(printJob, image));

        if (printJob.printDialog()) {
            try {
                printJob.print();
            } catch (PrinterException prt) {
                prt.printStackTrace();
            }
        }
    }

    private BufferedImage createPanelImage() {
        JPanel panel = frame.getSudokuPanel();
        BufferedImage image = new BufferedImage(panel.getWidth(),
                panel.getHeight(), BufferedImage.TYPE_INT_RGB);
        Graphics2D g = image.createGraphics();
        panel.paint(g);
        g.dispose();
        return image;
    }

    public class ImagePrintable implements Printable {

        private double          x, y, width;

        private int             orientation;

        private BufferedImage   image;

        public ImagePrintable(PrinterJob printJob, BufferedImage image) {
            PageFormat pageFormat = printJob.defaultPage();
            this.x = pageFormat.getImageableX();
            this.y = pageFormat.getImageableY();
            this.width = pageFormat.getImageableWidth();
            this.orientation = pageFormat.getOrientation();
            this.image = image;
        }

        @Override
        public int print(Graphics g, PageFormat pageFormat, int pageIndex)
                throws PrinterException {
            if (pageIndex == 0) {
                int pWidth = 0;
                int pHeight = 0;
                if (orientation == PageFormat.PORTRAIT) {
                    pWidth = (int) Math.min(width, (double) image.getWidth());
                    pHeight = pWidth * image.getHeight() / image.getWidth();
                } else {
                    pHeight = (int) Math.min(width, (double) image.getHeight());
                    pWidth = pHeight * image.getWidth() / image.getHeight();
                }
                g.drawImage(image, (int) x, (int) y, pWidth, pHeight, null);
                return PAGE_EXISTS;
            } else {
                return NO_SUCH_PAGE;
            }
        }

    }

}

为首发拍摄第二张。

＆＃34; org.hibernate.HibernateException：命名查询中的错误＆＃34;在manyToMany中加入查询

1 个答案: