我在多个类上使用getter和setter访问变量时遇到问题。我抬起头this one，但我很困惑。
我有3个类型的用户：mysql表中的Admin (Position No: 0，Manager (Position No: 1)，Clerk (Position No:2)。
我有SeeReportsAndFeedbacks课。我想通过选择position_no = 0的行来显示所有报告，其中1代表管理员和经理，2代表职员。 if语句已经完成了。
因此，店员只能看到带有position_no=2的报告
经理只能看到带有position_no=0和1的报告
管理员只能看到带有position_no=0和1的报告
请帮我。我在这里呆了很长时间。我的吸气器安装程序有什么问题？
如果我在Login_Form上设置，并调用get在girisyap()函数中显示正确，但是如果我在名为SeeReportsAndFeedbacks的其他类中调用get，它将显示Users () constructor中的第一个初始值，而不是girisyap()函数上的设置值Login_Form。tip值将mysql db中的position_no作为字符串，new1值将if语句解析（转换）为int字符串
screenshot
GIST
用户类别
public class Users {
private int id;
private String username;
private String fullname;
private String password;
private String phone;
private String gender;
private byte[] image;
private int position_no;
public Users () {
setPno(1); //firsst initialize
//getFullname();
}
public Users (int uid ,String uname, String fname, String upassword, String uphone, String ugender, byte[] uimage, int pno){
this.id = uid;
this.username = uname;
this.fullname = fname;
this.password = upassword;
this.phone = uphone;
this.gender =ugender;
this.image =uimage;
this.position_no = pno;
}
public Users (int pno){
setPno(pno);
}
public int getPno(){
return position_no;
}
public void setPno(int pno){
this.position_no = pno;
}}
SeeReportsAndFeedbacks类（针对该问题，我删除了不相关的功能或其他一些gui东西。
public class SeeReportsAndFeedbacks { // extends javax.swing.JFrame
//CLIENT client = new CLIENT();
int new1 = 9999; //testing something
int PositionNoGetiren;
//sers loginf = new Users(0, null,null,null,null,null,null,new1);
public SeeReportsAndFeedbacks() {
//initComponents();
Users loginf = new Users();
PositionNoGetiren = loginf.getPno(); //gets initial value instead of set value on login_form
System.out.println("Babakingg " + PositionNoGetiren);
//int ananas = loginf.getPno();
//fillFeedbackJTable(jTable2);
}
public void fillReportJTable(){//JTable table
//loginf.setPno(2); it works if i manually set but it's useless
//System.out.println("Loginfvalue in see reports: " + loginf.getPno() + loginf.getUsername());
//new1 = loginf.getPno(); //not works shows 0
//see.getNo();
new1=PositionNoGetiren;
String selectQuery = "SELECT * FROM `users` WHERE `position_no` = ?";
if(new1==0){//admin
selectQuery = "SELECT * FROM `reports`";
}
if(new1==1){//manager
selectQuery = "SELECT * FROM `reports` WHERE `position_no` = 1";
}
if(new1==2){//clerk
selectQuery = "SELECT * FROM `reports` WHERE `position_no` = 2";
}
//}
}}
登录表单
public class Login_Form {
int positionNoGetiren;
/**
* Creates new form Login_Form
*/
public Login_Form() {
//initComponents();
//positionNoGetiren = 9999;
}
private void girisyap() {
//I DELETED ALL DATABASE RELATED THINGS FOR QUESTION.
//String tip = rs.getString("position_no"); //DETECTS CORRECTLY POSITION NO FROM DATABASE
String tip = "IT'S rs.getString(\"position_no\")"; //for posting question
System.out.println(tip);
int new1 = Integer.parseInt(tip);
//Users loginf = new Users(new1); //welcome yazisi icin
Users loginf = new Users(); //ONLY WORKS IN THIS CLASS.
loginf.setPno(new1); //set user type for reports class BUT IT'S NOT WORKING
System.out.println("Loginf degeri login_formdaki: " + loginf.getPno());
//THIS IF IS WORKING CORRECTLY.
if(new1==0){
//Admin form = new Admin();
//form.setVisible(true);
//form.pack();
//form.setLocationRelativeTo(null);
// form.setExtendedState(JFrame.MAXIMIZED_BOTH);
}
if(new1==1){
//Manager form = new Manager();
//form.setVisible(true);
//form.pack();
//form.setLocationRelativeTo(null);
}
if(new1==2){
//Clerk form = new Clerk();
//form.setVisible(true);
//form.pack();
//form.setLocationRelativeTo(null);
// form.setExtendedState(JFrame.MAXIMIZED_BOTH);
}
//this.dispose();
}
private void jButton_LoginActionPerformed(java.awt.event.ActionEvent evt) {
girisyap();}
}
最佳答案
您的获取者和安装者没有错。
这很可能是与解析TIP值有关的一个问题，无法将其解析为INT，可能是其浮点值具有类似2.00000004之类的浮点数，或者仅仅是null。尝试编写测试或记录查询返回的值，然后检查这是否是您要查找的值。