Swing入门级项目全程实录第6讲

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1、创建数据表t_book(略)

 

2、创建BookModel

package com.java1234.model;

public class Book {

    private int id;
    private String bookName;
    private String author;
    private String sex;
    private float price;
    private String bookDesc;
    private int bookTypeId;
    
    /**
     * @return the id
     */
    public int getId() {
        return id;
    }
    /**
     * @param id the id to set
     */
    public void setId(int id) {
        this.id = id;
    }
    /**
     * @return the bookName
     */
    public String getBookName() {
        return bookName;
    }
    /**
     * @param bookName the bookName to set
     */
    public void setBookName(String bookName) {
        this.bookName = bookName;
    }
    /**
     * @return the author
     */
    public String getAuthor() {
        return author;
    }
    /**
     * @param author the author to set
     */
    public void setAuthor(String author) {
        this.author = author;
    }
    /**
     * @return the sex
     */
    public String getSex() {
        return sex;
    }
    /**
     * @param sex the sex to set
     */
    public void setSex(String sex) {
        this.sex = sex;
    }
    /**
     * @return the price
     */
    public float getPrice() {
        return price;
    }
    /**
     * @param price the price to set
     */
    public void setPrice(float price) {
        this.price = price;
    }
    /**
     * @return the bookDesc
     */
    public String getBookDesc() {
        return bookDesc;
    }
    /**
     * @param bookDesc the bookDesc to set
     */
    public void setBookDesc(String bookDesc) {
        this.bookDesc = bookDesc;
    }
    /**
     * @return the bookTypeId
     */
    public int getBookTypeId() {
        return bookTypeId;
    }
    /**
     * @param bookTypeId the bookTypeId to set
     */
    public void setBookTypeId(int bookTypeId) {
        this.bookTypeId = bookTypeId;
    }
    
}

3、创建BookAddInterFrm(略)

 

4、在MainFrm中添加图书添加链接

private void jmi_BookAddActionPerformed(java.awt.event.ActionEvent evt) {
        //添加图书窗口 
        BookAddInterFrm BookAddInterFrm = new BookAddInterFrm();
        BookAddInterFrm.setVisible(true);
        table.add(BookAddInterFrm);
    }

5、添加jcb_BookType下拉列表框

/**
     * 添加jcb_BookType下拉列表框
     */
    private void fillBookType() {
        BookType bookType=null;
        Connection con=null;
        try {
            con=dbUtil.getCon();
            ResultSet rs=bookTypeDao.bookTypeList(con, new BookType());
            
            while(rs.next()){
                bookType=new BookType();
                bookType.setId(rs.getInt("id"));
                bookType.setBookTypeName(rs.getString("bookTypeName"));
                jcb_bookType.addItem(bookType);    
            }
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        
    }

　　修改toString方法，设定返回值

public String toString() {
        return getBookTypeName();
    }

 6、设置默认属性

      //设置窗口的位置
        setLocation(500, 150);
        
        //设置默认值
        jrb_man.setSelected(true);
        if(jcb_bookType.getItemCount()>0){
            jcb_bookType.setSelectedIndex(0);            
        }
        
        //显示下拉列表框
        fillBookType();

 7、编写重置代码

private void jb_resetActionPerformed(java.awt.event.ActionEvent evt) {
        resetValue();
    }
    
    //重置
    private void resetValue(){
        bookNameTxt.setText("");
        authorTxt.setText("");
        jrb_man.setSelected(true);
        if (jcb_bookType.getItemCount() > 0) {
            jcb_bookType.setSelectedIndex(0);
        }
        priceTxt.setText("");
        bookDescTxt.setText("");
    }

 8、编写添加代码

/**
     * 图书添加
     * @param con
     * @param book
     * @return int
     * @throws Exception
     */
    public int bookAdd(Connection con,Book book) throws Exception{
        String sql="insert into t_book values(null,?,?,?,?,?,?)";
        PreparedStatement pstmt=con.prepareStatement(sql);
        pstmt.setString(1, book.getBookName());
        pstmt.setString(2, book.getAuthor());
        pstmt.setString(3, book.getSex());
        pstmt.setFloat(4, book.getPrice());
        pstmt.setString(5, book.getBookDesc());
        pstmt.setInt(6, book.getBookTypeId());
        return pstmt.executeUpdate();
    }

/**
     * 图书添加事件
     */
    private void jb_addActionPerformed(java.awt.event.ActionEvent evt) {
        //获取数据
        String bookName=bookNameTxt.getText();
        String author=authorTxt.getText();
        String price=priceTxt.getText();
        String bookDesc=bookDescTxt.getText();
        
        String sex="";
        if(jrb_man.isSelected()){
            sex="男";
        }
        if(jrb_female.isSelected()){
            sex="女";
        }
        
        BookType bookType=(BookType) jcb_bookType.getSelectedItem();
        int bookTypeId=bookType.getId();
        
        //判断是否为空
        if(StringUtil.isEmpty(bookName)){
            JOptionPane.showMessageDialog(null, "图书名称不能为空");
            return;
        }
        if(StringUtil.isEmpty(author)){
            JOptionPane.showMessageDialog(null, "图书作者不能为空");
            return;
        }
        if(StringUtil.isEmpty(price)){
            JOptionPane.showMessageDialog(null, "图书价格不能为空");
            return;
        }
        
        //封装
        Book book=new Book(bookName,author,sex,Float.parseFloat(price),bookDesc,bookTypeId);
        
        //连接数据库，并添加数据
        Connection con=null;
        try {
            con=dbUtil.getCon();
            int addNum=bookDao.bookAdd(con, book);
            if(addNum==1){
                JOptionPane.showMessageDialog(null, "添加成功");
                resetValue();
            }else{
                JOptionPane.showMessageDialog(null, "添加失败");
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "添加失败");
        }finally{
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }