我在从数据库获取数据以输出到控制台时遇到问题。而不是检索此信息 String sql = "SELECT * FROM COMPANY"; 我的输出是这个
org.sqlite.RS@18893021
1 John javax.swing.JLabel[,0,42,195x16,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=8388608,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,horizontalAlignment=LEADING,horizontalTextPosition=TRAILING,iconTextGap=4,labelFor=,text=Age: ,verticalAlignment=CENTER,verticalTextPosition=CENTER] javax.swing.JLabel[,0,84,195x16,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=8388608,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,horizontalAlignment=LEADING,horizontalTextPosition=TRAILING,iconTextGap=4,labelFor=,text=Address: ,verticalAlignment=CENTER,verticalTextPosition=CENTER] javax.swing.JLabel[,0,126,195x16,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=8388608,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,horizontalAlignment=LEADING,horizontalTextPosition=TRAILING,iconTextGap=4,labelFor=,text=Salary: ,verticalAlignment=CENTER,verticalTextPosition=CENTER]
这是我的代码:
package userinterface;
import javax.swing.JFrame;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import backend.SQLiteDb;
import business.Person;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.BorderLayout;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class GUI {
static SQLiteDb db;
public static void main(String[] args) {
final JFrame jframe = new JFrame();
JButton btnEnterInfo = new JButton("Enter Info");
jframe.getContentPane().add(btnEnterInfo, BorderLayout.CENTER);
jframe.setVisible(true);
jframe.setSize(300, 300);
btnEnterInfo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JLabel fullName = new JLabel("Full Name: ");
JTextField nameField = new JTextField();
JLabel age = new JLabel("Age: ");
JTextField ageField = new JTextField();
JLabel address = new JLabel("Address: ");
JTextField addressField = new JTextField();
JLabel salary = new JLabel("Salary: ");
JTextField salaryField = new JTextField();
Object[] ob = { fullName, nameField, age, ageField, address,
addressField,
salary, salaryField };
int result = JOptionPane.showConfirmDialog(null, ob, "Part 5",
JOptionPane.OK_CANCEL_OPTION);
jframe.getContentPane().setLayout(new FlowLayout());
if (result == JOptionPane.OK_OPTION) {
db = new SQLiteDb();
db.createPersonnelTable();
String fullName1 = nameField.getText();
String userAge = ageField.getText();
String userAddress = addressField.getText();
String userSalary = salaryField.getText();
Person person = new Person(fullName1, Integer
.parseInt(userAge), userAddress,
Double.parseDouble(salaryField.getText()));
db.addPerson(person);
String sql = "SELECT * FROM COMPANY";
Statement stmt = null;
try {
java.sql.Statement s;
Connection connection = DriverManager
.getConnection("JDBC:sqlite:Andy.db");
stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(sql);
while (rs.next()) {
int id_col = rs.getInt("ID");
String name = rs.getString("name");
int age1 = rs.getInt("Age");
float address1 = rs.getFloat("Address");
double salary1 = rs.getInt("Salary");
System.out.println(rs);
String output = id_col + " " + name + " " + age + " " + address + " " + salary;
System.out.println(output);
rs.close();
}
} catch (SQLException ee) {
System.out.println("ee error");
ee.printStackTrace();
} finally {
if (stmt != null) {
try {
stmt.close();
} catch (SQLException e1) {
// TODO Auto-generated catch block
System.out.println("e1 error");
e1.printStackTrace();
}
}
}
}
}
});
}
public static void viewTable(Connection con, String dbName)
throws SQLException {
}