基于树状视图的数据库表结构查看器

package databasevisit;import java.awt.BorderLayout;import java.awt.event.ItemEvent;import java.awt.e

package databasevisit; import java.awt.BorderLayout; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import java.util.Vector; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JScrollPane;