从数据库中读取数据并存储在数组列表对象中 [英] Reading Data From Database and storing in Array List object
本文介绍了从数据库中读取数据并存储在数组列表对象中的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
你好,我想在html页面上显示数据库表的全部内容.我试图先从数据库中获取记录并存储在ArrayList
中,但是当我在html页面上返回数组列表时,它只重复显示最后一条记录我的数据库表的数量.
这是下面的代码:
Hello all i want to display entire content of my database table on html page.I am trying to fetch record from database first and store in ArrayList
but when i return array list on html page it display only last record repeatedly as count of my database table.
Here is the code below :
public ArrayList<CustomerDTO> getAllCustomers()
{
ArrayList<CustomerDTO> customers = new ArrayList<CustomerDTO>();
CustomerDTO customer = null;
Connection c;
try {
c = openConnection();
Statement statement = c.createStatement();
String s = "SELECT * FROM customer";
ResultSet rs = statement.executeQuery(s);
int g =0;
while (rs.next()) {
customer.setId(rs.getInt("id"));
customer.setName(rs.getString("name"));
customer.setAddress(rs.getString("address"));
customer.setPhone(rs.getString("phone"));
customer.setEmail(rs.getString("email"));
customer.setBountPoints(rs.getInt("bonuspoint"));
customer.setTotalsale(rs.getInt("totalsale"));
customers.add(customer);
}
rs.close();
} catch (Exception e) {
System.out.println(e);
}
return customers;
}
推荐答案
尝试以下代码
public static ArrayList<Customer> getAllCustomer() throws ClassNotFoundException, SQLException {
Connection conn=DBConnection.getDBConnection().getConnection();
Statement stm;
stm = conn.createStatement();
String sql = "Select * From Customer";
ResultSet rst;
rst = stm.executeQuery(sql);
ArrayList<Customer> customerList = new ArrayList<>();
while (rst.next()) {
Customer customer = new Customer(rst.getString("id"), rst.getString("name"), rst.getString("address"), rst.getDouble("salary"));
customerList.add(customer);
}
return customerList;
}
这是我的模型课
public class Customer {
private String id;
private String name;
private String salary;
private String address;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSalary() {
return salary;
}
public void setSalary(String salary) {
this.salary = salary;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
这是我的查看方法
private void reloadButtonActionPerformed(java.awt.event.ActionEvent evt) {
try {
ArrayList<Customer> customerList = null;
try {
try {
customerList = CustomerController.getAllCustomer();
} catch (SQLException ex) {
Logger.getLogger(veiwCustomerFrame.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (Exception ex) {
Logger.getLogger(ViewCustomerForm.class.getName()).log(Level.SEVERE, null, ex);
}
DefaultTableModel tableModel = (DefaultTableModel) customerTable.getModel();
tableModel.setRowCount(0);
for (Customer customer : customerList) {
Object rowData[] = {customer.getId(), customer.getName(), customer.getAddress(), customer.getSalary()};
tableModel.addRow(rowData);
}
} catch (Exception ex) {
Logger.getLogger(ViewCustomerForm.class.getName()).log(Level.SEVERE, null, ex);
}
}
这篇关于从数据库中读取数据并存储在数组列表对象中的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文