s1(java)项目实战（固定资产管理）（set_ childkindsAdd ）

 package set;

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import tools.*;

public class childkindsAdd extends JDialog {
    private JLabel jLabel3 = new JLabel();
    private JLabel jLabel1 = new JLabel();
    private JLabel jLabel2 = new JLabel();
    private JTextField txt_kindsID = new JTextField();
    private JTextField txt_kindsname = new JTextField();
    private JComboBox cmb_toplist;
    private JButton btn_ok = new JButton();
    private JButton btn_cancle = new JButton();
    private DBConnection dcon = null;
    private HashMap topmap = new HashMap();
    private String user;

    public childkindsAdd(Frame owner, String title, boolean modal,String _user) {
        super(owner, title, modal);
        try {
                  this.user = _user;
            setDefaultCloseOperation(DISPOSE_ON_CLOSE);
            jbInit();
            pack();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    public childkindsAdd(String _user) {
        this(new Frame(), "childkindsAdd", false,_user);
    }

    private void jbInit() throws Exception {
        inittopmap();
        cmb_toplist = new JComboBox(getNamelist());
        this.getContentPane().setLayout(null);
        jLabel3.setFont(new java.awt.Font("Dialog", Font.BOLD, 13));
        jLabel3.setToolTipText("");
        jLabel3.setText("科 目 ID");
        jLabel3.setBounds(new Rectangle(33, 65, 72, 39));
        this.setFont(new java.awt.Font("Dialog", Font.BOLD, 13));
        jLabel2.setFont(new java.awt.Font("Dialog", Font.BOLD, 13));
        jLabel2.setToolTipText("");
        jLabel2.setText("上级科目");
        jLabel2.setBounds(new Rectangle(32, 27, 72, 39));
        cmb_toplist.setBounds(new Rectangle(95, 36, 84, 24));
        txt_kindsname.setText("");
        txt_kindsname.setBounds(new Rectangle(93, 114, 80, 25));
        txt_kindsID.setText("");
        txt_kindsID.setBounds(new Rectangle(93, 73, 79, 24));

        this.getContentPane().add(jLabel3);
        txt_kindsID.setText(getchildKindsID(cmb_toplist.getSelectedItem().
                                            toString().trim()));
        txt_kindsID.setEditable(false);
        btn_cancle.setBounds(new Rectangle(125, 171, 70, 35));
        btn_cancle.setText("关闭");
        btn_ok.setBounds(new Rectangle(27, 169, 72, 36));
        btn_ok.setText("确定");
        this.getContentPane().add(jLabel1);
        this.getContentPane().add(jLabel2);
        this.getContentPane().add(txt_kindsname);
        this.getContentPane().add(txt_kindsID);
        this.getContentPane().add(cmb_toplist);
        this.getContentPane().add(btn_ok);
        this.getContentPane().add(btn_cancle);
        jLabel1.setFont(new java.awt.Font("Dialog", Font.BOLD, 13));
        jLabel1.setToolTipText("");
        jLabel1.setText("科目名称");
        jLabel1.setBounds(new Rectangle(31, 107, 72, 39));
        cmb_toplist.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                txt_kindsID.setText(getchildKindsID(cmb_toplist.getSelectedItem().
                        toString().trim()));
            }
        });
        btn_ok.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                addkinds();
                closedialog();
            }
        });
        btn_cancle.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                closedialog();
            }
        });

    }

    private void closedialog() {
        this.dispose();
    }

    private void addkinds() {
        if (txt_kindsname.getText().trim().length() == 0) {
            JOptionPane.showMessageDialog(this, "名称不能为空");
        } else {
            dcon = new DBConnection();
            String sql = "select * from ChildKind where childkind_name = '" +
                         txt_kindsname.getText().trim() + "'";
            if (dcon.isNull(sql)) {
                JOptionPane.showMessageDialog(this, "该名称已经存在");
            } else {
                sql =
                        "insert into ChildKind (fatherkind_id,childkind_id,childkind_name) values ('";
                sql += getTopid(cmb_toplist.getSelectedItem().toString().trim()) +
                        "','";
                sql += txt_kindsID.getText().trim() + "','";
                sql += txt_kindsname.getText().trim() + "')";
                JOptionPane.showMessageDialog(this, dcon.update(3, sql));
                txt_kindsname.setText("");
            }
        }
    }

    // 初始化HashMap
    private void inittopmap() {
        dcon = new DBConnection();
        String sql = "select * from FatherKind";
        Vector v = dcon.select(sql);
        for (int i = 0; i < v.size(); i++) {
            String id = ((Vector) v.get(i)).get(0).toString();
            String name = ((Vector) v.get(i)).get(1).toString();
            topmap.put(name, id);
        }
    }

    //id list
    private String[] getNamelist() {
        String[] str = new String[topmap.size()];
        Set set = topmap.entrySet();
        Iterator it = set.iterator();
        int i = 0;
        while (it.hasNext()) {
            Map.Entry me = (Map.Entry) it.next();
            str[i] = me.getKey().toString();
            i++;
        }
        return str;
    }

    public String getTopid(String name) {
        return topmap.get(name).toString();
    }

    private String getchildKindsID(String name) {
        String topid = getTopid(name);
        dcon = new DBConnection();
        Vector v = dcon.select(
                "select childkind_id from ChildKind where fatherkind_id = '" +
                topid + "' order by childkind_id asc");
        if (v.size() == 0) {
            return topid + "001";
        }
        int autoID = 1;
        for (int i = 0; i < v.size(); i++) {
            String s = ((Vector) v.get(i)).get(0).toString().trim();
            String Temp;
            if(autoID < 10)
            {
              Temp  = (topid).trim() + "00"+autoID;
            } else if(autoID < 100)
            {
                Temp  = (topid).trim() + "0"+autoID;
            }  else {
                Temp  = (topid).trim() + autoID;
            }
            if (!Temp.equals(s)) {
                return Temp;
            }
            autoID++;
        }
        autoID = v.size() + 1;
        if(autoID<10)
        {
           return topid + "00"+autoID;
        }else if(autoID < 100)
        {
            return topid + "0"+autoID;
        }else{
        return topid + autoID;}
    }
}