如何使用jdbc获得指定sql中的表的名称

import java.sql.Connectionimport java.sql.DriverManagerimport java.sql.ResultSetimport java.sql.PreparedStatementimport java.sql.ResultSetMetaDataimport java.sql.SQLExceptionpublic class TestDemo {public static Connection getConnection() {Connection conn = nulltry {Class.forName("com.mysql.jdbc.Driver")String url = "jdbc:mysql://数据库IP地址:3306/数据库名称"String user = "数据库用户名"String pass = "数据库用户密码"conn = DriverManager.getConnection(url, user, pass)} catch (ClassNotFoundException e) {e.printStackTrace()} catch (SQLException e) {e.printStackTrace()}return conn}public static void main(String[] args) {Connection conn = getConnection()String sql = "select * from AccessType"PreparedStatement stmttry {stmt = conn.prepareStatement(sql)ResultSet rs = stmt.executeQuery(sql)ResultSetMetaData data = rs.getMetaData()for (int i = 1i <= data.getColumnCount()i++) {// 获得所有列的数目及实际列数int columnCount = data.getColumnCount()// 获得指定列的列名String columnName = data.getColumnName(i)// 获得指定列的列值int columnType = data.getColumnType(i)// 获得指定列的数据类型名String columnTypeName = data.getColumnTypeName(i)// 所在的Catalog名字String catalogName = data.getCatalogName(i)// 对应数据类型的类String columnClassName = data.getColumnClassName(i)// 在数据库中类型的最大字符个数int columnDisplaySize = data.getColumnDisplaySize(i)// 默认的列的标题String columnLabel = data.getColumnLabel(i)// 获得列的模式String schemaName = data.getSchemaName(i)// 某列类型的精确度(类型的长度)int precision = data.getPrecision(i)// 小数点后的位数int scale = data.getScale(i)// 获取某列对应的表名String tableName = data.getTableName(i)// 是否自动递增boolean isAutoInctement = data.isAutoIncrement(i)// 在数据库中是否为货币型boolean isCurrency = data.isCurrency(i)// 是否为空int isNullable = data.isNullable(i)// 是否为只读boolean isReadOnly = data.isReadOnly(i)// 能否出现在where中boolean isSearchable = data.isSearchable(i)System.out.println(columnCount)System.out.println("获得列" + i + "的字段名称:" + columnName)System.out.println("获得列" + i + "的类型,返回SqlType中的编号:"+ columnType)System.out.println("获得列" + i + "的数据类型名:" + columnTypeName)System.out.println("获得列" + i + "所在的Catalog名字:"+ catalogName)System.out.println("获得列" + i + "对应数据类型的类:"+ columnClassName)System.out.println("获得列" + i + "在数据库中类型的最大字符个数:"+ columnDisplaySize)System.out.println("获得列" + i + "的默认的列的标题:" + columnLabel)System.out.println("获得列" + i + "的模式:" + schemaName)System.out.println("获得列" + i + "类型的精确度(类型的长度):" + precision)System.out.println("获得列" + i + "小数点后的位数:" + scale)System.out.println("获得列" + i + "对应的表名:" + tableName)System.out.println("获得列" + i + "是否自动递增:" + isAutoInctement)System.out.println("获得列" + i + "在数据库中是否为货币型:" + isCurrency)System.out.println("获得列" + i + "是否为空:" + isNullable)System.out.println("获得列" + i + "是否为只读:" + isReadOnly)System.out.println("获得列" + i + "能否出现在where中:"+ isSearchable)}} catch (SQLException e) {e.printStackTrace()}}}

取字段注释 这样写就OK

Select COLUMN_NAME 列名, DATA_TYPE 字段类型, COLUMN_COMMENT 字段注释

from INFORMATION_SCHEMA.COLUMNS

Where table_name = 'companies'##表名

AND table_schema = 'testhuicard'##数据库名

AND column_name LIKE 'c_name'##字段名

取表注释这样写

Select table_name 表名,TABLE_COMMENT 表注释 from INFORMATION_SCHEMA.TABLES Where table_schema = 'testhuicard' ##数据库名

AND table_name LIKE 'companies'##表名

我想应该很清晰了吧，我写的都是SQL语句 你通过JDBC自己一调就全调出来了！有疑问就问出来哈

---