我用于数据插入的代码。 这个过程工作正常，直到执行语句。不知道我为什么要面对这个问题。
package com.emandi.dao;
import java.sql.Date;
import java.sql.Statement;
import com.emandi.dbconnection.DBConnection;
import com.emandi.domain.Item;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;
public class ItemDAO {
public void createItem(Item item) throws SQLException, ClassNotFoundException {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (Exception ex) {
}
Connection con = DBConnection.getConnection();
String query = "insert into item(item_id, item_name, total_quantity, available_quantity,date,user_id,item_type_id)"
+ " values (?, ?, ?, ?,?,?,?)";
PreparedStatement preparedStmt = con.prepareStatement(query);
Long a12= item.getItemId();
preparedStmt.setLong(1,a12);
preparedStmt.setString(2,item.getItemName());
preparedStmt.setDouble (3,item.getTotalQuantity());
preparedStmt.setDouble (4,item.getAvailableQuantity());
//java.sql.Date d= new java.sql.Date(format.parse(source).getTime());
java.util.Date utilStartDate = item.getDate();
java.sql.Date sqlStartDate = new java.sql.Date(utilStartDate.getTime());
preparedStmt.setDate(5,sqlStartDate);
Long as = item.getUser().getUserId();
preparedStmt.setLong(6,as);
Long as1 = item.getItemType().getItemTypeId();
preparedStmt.setLong(7,as1);
System.out.println("Before");
preparedStmt.executeUpdate();
System.out.println("After");
}
}
Class项如下
public class Item {
private Long itemId;
private User user;
private ItemType itemType;
private String itemName;
private Double totalQuantity;
private Double availableQuantity;
private Date date;
}
我现在还附加了输出屏幕。enter image description here
现在我还使用Total_quantity的正确拼写更新了插入查询。
仍面临问题
