在自定义 jtable 中显示结果集 [英] Display resultset in custom jtable
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问题描述
这是我的完整代码...
Here is my complete code...
当我运行它并单击按钮时，它在结果集中显示 nullpointer exception
When I run this and click button its showing nullpointer exception at resultset
package com.openbravo.pos.followup;
/**
*
* @author manideep
*/
public class FollowUp extends javax.swing.JPanel implements JPanelView, BeanFactoryApp {
private AppView m_App;
protected DataLogicCustomers dlCustomers;
// CustomerInfo customer;
private AppConfig conf;
// private ListProvider lpr
private DefaultTableModel modelx, model;
protected DataLogicFollowUp dlFollowUp;
/**
* Creates new form FollowUp
*/
public FollowUp() {
initComponents();
String[] args = {};
conf = new AppConfig(args);
conf.load();
jLabel3.setText("");
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jLabel3 = new javax.swing.JLabel();
jButton3 = new javax.swing.JButton();
jButton4 = new javax.swing.JButton();
m_jTicketId3 = new javax.swing.JLabel();
m_jTicketId1 = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
jcmdOK = new javax.swing.JButton();
jcmdCancel = new javax.swing.JButton();
jCheckBox1 = new javax.swing.JCheckBox();
jLabel1.setText("Enter Date");
jTextField1.setPreferredSize(new java.awt.Dimension(90, 19));
jButton1.setText("Submit");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jLabel3.setText("jLabel3");
jButton3.setText("Customer");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
jButton4.setText("Product");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton4ActionPerformed(evt);
}
});
m_jTicketId3.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
m_jTicketId3.setBorder(javax.swing.BorderFactory.createCompoundBorder(javax.swing.BorderFactory.createLineBorder(javax.swing.UIManager.getDefaults().getColor("Button.darkShadow")), javax.swing.BorderFactory.createEmptyBorder(1, 4, 1, 4)));
m_jTicketId3.setOpaque(true);
m_jTicketId3.setPreferredSize(new java.awt.Dimension(160, 25));
m_jTicketId3.setRequestFocusEnabled(false);
m_jTicketId1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
m_jTicketId1.setBorder(javax.swing.BorderFactory.createCompoundBorder(javax.swing.BorderFactory.createLineBorder(javax.swing.UIManager.getDefaults().getColor("Button.darkShadow")), javax.swing.BorderFactory.createEmptyBorder(1, 4, 1, 4)));
m_jTicketId1.setOpaque(true);
m_jTicketId1.setPreferredSize(new java.awt.Dimension(160, 25));
m_jTicketId1.setRequestFocusEnabled(false);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 158, Short.MAX_VALUE))
.addGap(154, 154, 154)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 113, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 113, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(m_jTicketId1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(m_jTicketId3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(jLabel3))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(21, 21, 21)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 28, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 32, Short.MAX_VALUE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(24, 24, 24)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jButton3)
.addComponent(m_jTicketId3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jButton4))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGap(17, 17, 17)
.addComponent(m_jTicketId1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(0, 0, Short.MAX_VALUE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jLabel3)
.addGap(24, 24, 24))
);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"Customer", "Phone No.", "Product", "Last sold Qty.", "Consumption", "last sale date", "Delivery Date", "Remark 1", "Remark 2", "Stock(Y/N)", "Invoice No."
}
) {
Class[] types = new Class [] {
java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.Integer.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class
};
boolean[] canEdit = new boolean [] {
false, false, false, false, false, false, false, true, true, true, true
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit [columnIndex];
}
});
jTable1.getTableHeader().setReorderingAllowed(false);
jScrollPane1.setViewportView(jTable1);
jTable1.getColumnModel().getColumn(0).setResizable(false);
jTable1.getColumnModel().getColumn(1).setResizable(false);
jTable1.getColumnModel().getColumn(3).setResizable(false);
jTable1.getColumnModel().getColumn(4).setResizable(false);
jTable1.getColumnModel().getColumn(5).setResizable(false);
jTable1.getColumnModel().getColumn(6).setResizable(false);
jTable1.getColumnModel().getColumn(7).setResizable(false);
jTable1.getColumnModel().getColumn(7).setPreferredWidth(0);
jTable1.getColumnModel().getColumn(8).setResizable(false);
jTable1.getColumnModel().getColumn(9).setResizable(false);
jTable1.getColumnModel().getColumn(10).setResizable(false);
jcmdOK.setIcon(new javax.swing.ImageIcon(getClass().getResource("/com/openbravo/images/button_ok.png"))); // NOI18N
jcmdOK.setText("OK");
jcmdOK.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jcmdOKActionPerformed(evt);
}
});
jcmdCancel.setIcon(new javax.swing.ImageIcon(getClass().getResource("/com/openbravo/images/button_cancel.png"))); // NOI18N
jcmdCancel.setText("Cancel");
jcmdCancel.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jcmdCancelActionPerformed(evt);
}
});
jCheckBox1.setText("Select All");
jCheckBox1.setMaximumSize(new java.awt.Dimension(0, 0));
jCheckBox1.setPreferredSize(new java.awt.Dimension(0, 0));
jCheckBox1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jCheckBox1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(353, 353, 353)
.addComponent(jcmdOK)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jcmdCancel)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 1408, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jCheckBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(74, 74, 74))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(8, 8, 8)
.addComponent(jCheckBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 406, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 26, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jcmdOK)
.addComponent(jcmdCancel))
.addGap(31, 31, 31))
);
}// </editor-fold>//GEN-END:initComponents
private void getListSRLine(Element e){
String customer= getAttrDataFromElement((Element)e.getElementsByTagName("customer").item(0),"identifier");
String phone= getCharacterDataFromElement((Element)e.getElementsByTagName("phone").item(0));
String product=getAttrDataFromElement((Element)e.getElementsByTagName("product").item(0),"identifier");
String lastsoldqty=getCharacterDataFromElement((Element)e.getElementsByTagName("lastsoldqty").item(0));
String consumption=getCharacterDataFromElement((Element)e.getElementsByTagName("consumption").item(0));
String lastsaledate=getCharacterDataFromElement((Element)e.getElementsByTagName("lastsaledate").item(0));
String deliverydate=getCharacterDataFromElement((Element)e.getElementsByTagName("deliverydate").item(0));
String remark1=getCharacterDataFromElement((Element)e.getElementsByTagName("remark1").item(0));
String remark2=getCharacterDataFromElement((Element)e.getElementsByTagName("remark2").item(0));
String stock=getCharacterDataFromElement((Element)e.getElementsByTagName("stock").item(0));
String invoiceno=getCharacterDataFromElement((Element)e.getElementsByTagName("invoiceno").item(0));
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
model.addRow(new Object[]{customer,phone,product,lastsoldqty,consumption,lastsaledate,deliverydate,remark1,remark2,stock,invoiceno});
//sortColumn(model, 1, true);
model.fireTableDataChanged();
jTable1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
jTable1.setAutoCreateRowSorter(true);
jTable1.getColumnModel().getColumn(0).setPreferredWidth(150);
jTable1.getColumnModel().getColumn(1).setPreferredWidth(120);
jTable1.getColumnModel().getColumn(2).setPreferredWidth(200);
jTable1.getColumnModel().getColumn(3).setPreferredWidth(50);
jTable1.getColumnModel().getColumn(4).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(5).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(6).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(7).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(8).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(9).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(10).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(11).setPreferredWidth(0);
}
private void executeSearch() {
try {
Class.forName("org.postgresql.Driver");
} catch (ClassNotFoundException e) {
System.out.println("Where is your PostgreSQL JDBC Driver? "
+ "Include in your library path!");
e.printStackTrace();
return;
}
System.out.println("PostgreSQL JDBC Driver Registered!");
Connection connection = null;
try {
connection = DriverManager.getConnection(
"jdbc:postgresql://localhost:5432/openbravopos", "postgres",
"postgres");
} catch (SQLException e) {
System.out.println("Connection Failed! Check output console");
e.printStackTrace();
return;
}
if (connection != null) {
try {
System.out.println("You made it, take control your database now!");
int colCount;
String [] headers;
Statement stmt = null;
// rs=(ResultSet) dlFollowUp.getFollowUpList();
// getFollowUplist();
ResultSet rs = null;
rs = stmt.executeQuery("SELECT id,customer,phone,product,lastsoldqty,consumption,lastsaledate,deliverydate,remark1,remark2,stock,invoiceno FROM followup");
java.sql.ResultSetMetaData rsmd = rs.getMetaData();
int colNo = rsmd.getColumnCount();
while(rs.next()){
Object[] objects = new Object[colNo];
for(int i=0;i<colNo;i++){
objects[i]=rs.getObject(i+1);
}
model.addRow(objects);
}
jTable1.setModel(model);
} catch (SQLException ex) {
Logger.getLogger(FollowUp.class.getName()).log(Level.SEVERE, null, ex);
}
} else {
System.out.println("Failed to make connection!");
}
}
public static String getAttrDataFromElement(Element e,String attr){
return e.getAttribute(attr);
}
public static String getCharacterDataFromElement(Element e) {
Node child = e.getFirstChild();
if (child instanceof CharacterData) {
CharacterData cd = (CharacterData) child;
return cd.getData();
}
return "";
}
private void jcmdOKActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jcmdOKActionPerformed
// jButton1ActionPerformed(evt);
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
//dispose();
}//GEN-LAST:event_jcmdOKActionPerformed
private void jcmdCancelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jcmdCancelActionPerformed
dispose();
}//GEN-LAST:event_jcmdCancelActionPerformed
private void jCheckBox1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jCheckBox1ActionPerformed
// TODO add your handling code here:
}//GEN-LAST:event_jCheckBox1ActionPerformed
String field="";
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
jLabel3.setText("");
executeSearch();
// entity = response.getafilter();
}//GEN-LAST:event_jButton1ActionPerformed
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
JCustomerFinder finder = JCustomerFinder.getCustomerFinder(this, dlCustomers);
finder.setVisible(true);
CustomerInfo custsel=finder.getSelectedCustomer();
m_jTicketId3.setText(custsel.printName());
}//GEN-LAST:event_jButton3ActionPerformed
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
/* // TODO add your handling code here:
JProductFinder finder = JProductFinder.getProductFinder(this, dlSales, m_App.getInventoryLocation(),m_App);
finder.setVisible(true);
ProductAttrInfoExt prod = finder.getSelectedProduct();
m_jTicketId1.setText(prod.getName());*/
}//GEN-LAST:event_jButton4ActionPerformed
private void dispose(){
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
model.setRowCount(0);
jLabel3.setText(null);
model.fireTableDataChanged();
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
private javax.swing.JCheckBox jCheckBox1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
private javax.swing.JTextField jTextField1;
private javax.swing.JButton jcmdCancel;
private javax.swing.JButton jcmdOK;
private javax.swing.JLabel m_jTicketId1;
private javax.swing.JLabel m_jTicketId3;
// End of variables declaration//GEN-END:variables
@Override
public String getTitle() {
return "Follow Up";
}
@Override
public void activate() throws BasicException {
resetFollowUp();
}
public void resetFollowUp(){
jTextField1.setText("");
m_jTicketId3.setText("");
m_jTicketId1.setText("");
}
@Override
public boolean deactivate() {
return true;
}
@Override
public JComponent getComponent() {
return this;
}
@Override
public void init(AppView app) throws BeanFactoryException {
jTable1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
jTable1.getColumnModel().getColumn(0).setPreferredWidth(150);
jTable1.getColumnModel().getColumn(1).setPreferredWidth(150);
jTable1.getColumnModel().getColumn(2).setPreferredWidth(250);
jTable1.getColumnModel().getColumn(3).setPreferredWidth(100);
jTable1.getColumnModel().getColumn(4).setPreferredWidth(200);
jTable1.getColumnModel().getColumn(5).setPreferredWidth(250);
jTable1.getColumnModel().getColumn(6).setPreferredWidth(250);
jTable1.getColumnModel().getColumn(7).setPreferredWidth(250);
jTable1.getColumnModel().getColumn(8).setPreferredWidth(200);
jTable1.getColumnModel().getColumn(9).setPreferredWidth(200);
jTable1.getColumnModel().getColumn(10).setPreferredWidth(100);
DefaultTableModel modelx = (DefaultTableModel) jTable1.getModel();
for(int j=0;j< modelx.getRowCount();j++){
}
m_App=app;
// setWarehouse(m_App.getWarehouseSearchKey());
dlCustomers = (DataLogicCustomers) m_App.getBean("com.openbravo.pos.customers.DataLogicCustomers");
}
@Override
public Object getBean() {
return this;
}
}
推荐答案
你从不初始化 Statement 对象....
You never initialise the Statement object....
Statement stmt = null; // Look ma, I'm null
// rs=(ResultSet) dlFollowUp.getFollowUpList();
// getFollowUplist();
ResultSet rs = null;
// Look ma, I'm still null
rs = stmt.executeQuery("SELECT id,customer,phone,product,lastsoldqty,consumption,lastsaledate,deliverydate,remark1,remark2,stock,invoiceno FROM followup");
您需要先创建stmt 才能使用...
You need to create the stmt before you can use...
stmt = connection.createStatement();
您可以阅读 JDBC 的 benifit 教程
You may find reading through the JDBC tutorials of benifit
问题 2
您在 FollowUp 类开始时将 model 定义为实例变量...
You define model as instance variable at the start of your FollowUp class...
private DefaultTableModel modelx, model;
但是你从来没有将它初始化为任何东西......
But you never initialise it to anything....
我想，根据您的代码，您需要在 executeSearch 方法中初始化它...
I would imagine, based on your code, you would need to initialise it in your executeSearch method...
// You will need to fill this out with appropriate values,
// the number of columns in you JTable should match the
// the number columns from your query...
Object[] columns = new Object[]{....};
model = new DefaultTableModel(columns, 0);
while(rs.next()){
Object[] objects = new Object[colNo];
for(int i=0;i<colNo;i++){
objects[i]=rs.getObject(i+1);
}
model.addRow(objects);
}
这篇关于在自定义 jtable 中显示结果集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！
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