如何使用选择按钮创建 JSF 表

Question

我想创建 JSF 表，其中每行都有全选按钮和复选框。我找到了这个源代码example。按照这个 JSF 表教程，我找到了这个带有选择行 example 的 JSF 表。我尝试修改代码，但在 Netbeans 中出现错误，我不知道如何修复：

import java.io.Serializable;
import java.math.BigDecimal;
import javax.enterprise.context.SessionScoped;
// or import javax.faces.bean.SessionScoped;
import javax.inject.Named;
/* include SQL Packages */
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.PostConstruct;
import javax.sql.DataSource;
import javax.annotation.Resource;
import javax.faces.context.FacesContext;
import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
// or import javax.faces.bean.ManagedBean;   

import org.glassfish.osgicdi.OSGiService;

@Named("SessionsController")
@SessionScoped
public class Sessions implements Serializable {

    public Sessions() {
    }

    private Map<Long, Boolean> selectedIds = new HashMap<Long, Boolean>();
    private List<MyData> selectedDataList;

    /* Call the Oracle JDBC Connection driver */
    @Resource(name = "jdbc/Oracle")
    private DataSource ds;

    private static final ArrayList<SessionArray> sessionList =
            new ArrayList<SessionArray>(Arrays.asList(
            new SessionArray("A0001", "Intel CPU",
            new BigDecimal("700.00"), 1),
            new SessionArray("A0002", "Harddisk 10TB",
            new BigDecimal("500.00"), 2),
            new SessionArray("A0003", "Dell Laptop",
            new BigDecimal("11600.00"), 8),
            new SessionArray("A0004", "Samsung LCD",
            new BigDecimal("5200.00"), 3),
            new SessionArray("A0005", "A4Tech Mouse",
            new BigDecimal("100.00"), 10)));

    public ArrayList<SessionArray> getSessionList() {

        return sessionList;

    }

    public String deleteAction(SessionArray session) {

        sessionList.remove(session);
        return null;
    }

    public static class SessionArray {

        String orderNo;
        String productName;
        BigDecimal price;
        int qty;

        public SessionArray(String orderNo, String productName,
                BigDecimal price, int qty) {
            this.orderNo = orderNo;
            this.productName = productName;
            this.price = price;
            this.qty = qty;
        }

        public String getOrderNo() {
            return orderNo;
        }

        public void setOrderNo(String orderNo) {
            this.orderNo = orderNo;
        }

        public String getProductName() {
            return productName;
        }

        public void setProductName(String productName) {
            this.productName = productName;
        }

        public BigDecimal getPrice() {
            return price;
        }

        public void setPrice(BigDecimal price) {
            this.price = price;
        }

        public int getQty() {
            return qty;
        }

        public void setQty(int qty) {
            this.qty = qty;
        }
    }

    //select all  button code

    public String getSelectedItems() {

        // Get selected items.
        selectedDataList = new ArrayList<MyData>();
        for (MyData dataItem : dataList) {
            if (selectedIds.get(dataItem.getId()).booleanValue()) {
                selectedDataList.add(dataItem);
                selectedIds.remove(dataItem.getId()); // Reset.
            }
        }

        // Do your thing with the MyData items in List selectedDataList.

        return "selected"; // Navigation case.
    }

    public Map<Long, Boolean> getSelectedIds() {
        return selectedIds;
    }

    public List<MyData> getSelectedDataList() {
        return selectedDataList;
    }

}

当我想使用此代码private List<MyData> selectedDataList; 时，Netbeans 给了我一个错误。 MyData 找不到类。我该如何解决这个错误？

最好的祝福

Answer 1

你的项目/工作区中是否有 MyData 类...

如果不实现...如果存在，则导入它

如果您从某个示例中获取代码，请仔细检查您是否忘记了任何内容...