table的model生成

Java生成Table Model属性注释
这段代码展示了如何使用Java创建一个Table Model的属性注释。通过对输入的属性名进行处理,将下划线转为驼峰式命名,并生成对应的Java注释。这有助于在数据表模型中为字段提供清晰的描述。
public class Test {

    /**
     * @param args
     */
    public static void main(String[] args) {
      
        String[] attr =
            new String[] {"Student_ID", "Study_NO"};

        String[] annotation =
            new String[] {"先生ID", "勉強番号"};

        for (int i = 0; i < attr.length; i++) {

            String strAttr = attr[i].toLowerCase();
            String strAnn = annotation[i];

            while (strAttr.indexOf('_') != -1) {

                int index = strAttr.indexOf('_');
                strAttr = strAttr.replaceFirst("_", "");
                String first = strAttr.substring(0, index);
                String bigChar =
                    String.valueOf(strAttr.charAt(index)).toUpperCase();
                String end = strAttr.substring(index + 1);
                strAttr = first
                    + bigChar
                    + end;
            }

            StringBuffer sb = new StringBuffer();

            sb.append("        /**\n");
            sb.append("         * "
                + strAnn
                + "\n");
            sb.append("         */\n");
            sb.append("        private String "
                + strAttr
                + ";\n");
            System.out.println(sb);
        }

    }
}
使用 AbstractTableModel 构建Table 在表格中添加JButton按钮,之前在网上找了2天没有找到好用的程序,最终终于找到一个好用的例子。 不要使,我退你们分。。 sing the Swing JTable class can quickly become a sticky business when you want to customize it to your specific needs. First you must become familiar with how the JTable class is organized. Individual cells are rendered by TableCellRenderer implementations. The table contents are represented by an implementation of the TableModel interface. By default, JTable uses DefaultTableCellRenderer to draw its cells. DefaultTableCellRenderer recognizes a few primitive types, rendering them as strings, and can even display Boolean types as checkboxes. But it defaults to displaying the value returned by toString() for types it does not specifically handle. You have to provide your own TableCellRenderer implementation if you want to display buttons in a JTable. The TableCellRenderer interface contains only one method, getTableCellRendererComponent(...), which returns a java.awt.Component that knows how to draw the contents of a specific cell. Usually, getTableCellRendererComponent() will return the same component for every cell of a column, to avoid the unnecessary use of extra memory. But when the contents of a cell is itself a component, it is all right to return that component as the renderer. Therefore, the first step towards having JButtons display correctly in a JTable is to create a TableCellRenderer implementation that returns the JButton contained in the cell being rendered. In the accompanying code listing, JTableButtonRenderer demonstrates how to do this. Even after creating a custom TableCellRenderer, you're still not done. The TableModel associated with a given JTable does not only keep track of the contents of each cell, but it also keeps track of the class of data stored in each column. DefaultTableModel is designed to work with DefaultTableCellRenderer and will return java.lang.String.class for columns containing data types that it does not specifically handle. The exact method that does this is getColumnClass(int column). Your second step is to create a TableModel implementation that returns JButton.class for cells that contain JButtons. JTableButtonModel shows one way to do this. It just returns the result of getClass() for each piece of cell data. At this point, you're almost done, but not quite. What's the use of putting a JButton in a JTable if you can't press the darn thing? By default, JTable will not forward mouse events to components contained in its cells. If you want to be able to press the buttons you add to JTable, you have to create your own MouseListener that forwards events to the JButton cells. JTableButtonMouseListener demonstrates how you could do this.
### SQLModel 自动生成数据库表结构的方法 SQLModel 是一种结合了 Pydantic 和 SQLAlchemy 的 ORM 工具,支持通过模型类定义数据库表结构,并能够根据模型类自动生成数据库表。这种特性极大地简化了数据库建表的过程,同时保证了数据模型与数据库表结构的一致性。 在 SQLModel 中,模型类继承自 `SQLModel`,并通过字段定义来描述数据库表的列。当模型类定义完成后,可以通过调用 `create_engine` 和 `SQLModel.metadata.create_all()` 方法来生成数据库表结构。这种方式使得开发者无需手动编写 SQL 语句即可完成数据库建表工作,同时也支持在运行时动态创建表结构。 ```python from sqlmodel import SQLModel, create_engine, Field class Hero(SQLModel, table=True): id: int = Field(default=None, primary_key=True) name: str secret_name: str age: int | None = None engine = create_engine("sqlite:///database.db") SQLModel.metadata.create_all(engine) ``` 该机制类似于 Flask-SQLAlchemy 中通过 `db.Model` 定义模型并自动生成数据库表的方式,同时也与 Django 中通过 `inspectdb` 命令从数据库表反向生成模型的功能形成互补[^2]。 ### 表结构生成的自动管理 SQLModel 会根据模型类的定义自动推断数据库表的结构,包括字段类型、主键约束、默认值等。开发者只需定义模型类并调用 `create_all()` 方法,即可在数据库中创建对应的表结构。这种设计模式不仅提高了开发效率,也减少了手动维护 SQL 语句的复杂性。 此外,SQLModel 的模型类定义方式与 Pydantic 模型兼容,使得数据验证和数据库操作可以共用同一套模型定义,进一步提升了代码的复用性和一致性。 ### 数据模型与数据库结构的同步 在实际开发过程中,模型类可能会随着业务需求的变化而调整。SQLModel 提供了与数据库表结构同步的能力,可以通过重新调用 `create_all()` 方法或结合 Alembic 等迁移工具来实现数据库结构的更新。这种方式与 IDEA 根据数据库表结构生成 Model 类(POJO)的思路相呼应,体现了模型与数据库之间双向同步的重要性[^4]。
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