jdbcTemplate 查询数据库字段名称，类型方法

jdbcTemplate 操作方法

/**
*1.方法一：
*/
String sql = "select * from "+ tableName;
//RowCountCallbackHandler rcch = new RowCountCallbackHandler();
//this.jdbcTemplateDao.query(sql, rcch);
//String[] coloumnName = rcch.getColumnNames();
//int[] coloumnType = rcch.getColumnTypes();
SqlRowSet sqlRowSet = this.jdbcTemplateDao.queryForRowSet(sql);
SqlRowSetMetaData sqlRsmd = sqlRowSet.getMetaData();
int columnCount = sqlRsmd.getColumnCount();
for (int i = 1; i <= columnCount; i++) {
Map<String,String> fieldMap = new HashMap<String,String>();
fieldMap.put("name", sqlRsmd.getColumnName(i));
fieldMap.put("fieldType", String.valueOf(sqlRsmd.getColumnType(i)));
tableFieldList.add(fieldMap);
}

/**
*方法二：
*/
String sql = "select * from "+ tableName;
RowCountCallbackHandler rcch = new RowCountCallbackHandler();
this.jdbcTemplateDao.query(sql, rcch);
String[] coloumnName = rcch.getColumnNames();
int[] coloumnType = rcch.getColumnTypes();

下面这里是JDBC的操作方法

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.ResultSetMetaData;

public class OperateDB {

 public static void main(String[] args) {
  try {
   Class.forName("com.mysql.jdbc.Driver");
   String url = "jdbc:mysql://192.168.11.211/education?useUnicode=true&characterEncoding=utf-8";
   String user = "root";
   String password = "12345678";
   Connection con = (Connection) DriverManager.getConnection(url, user, password);
   Statement statement = con.createStatement();
   ResultSet result = statement.executeQuery("select * from t_sys_user");
注意，这里，完全可以操作视图，操作表的sql语句 与操作视图的sql语句一样，  

 


   ResultSetMetaData metadata = (ResultSetMetaData) result.getMetaData();
   List<String> metadataList = new ArrayList<String>();
   System.out.println("====================表结构=============================");
   for(int i = 1; i <= metadata.getColumnCount();i++){
    metadataList.add(metadata.getColumnName(i));
    System.out.print(metadata.getColumnName(i) + "   ");   //name
    System.out.print(metadata.getColumnTypeName(i) + "   ");  //type
    System.out.print(metadata.isNullable(i) + "   ");    //null
    System.out.print(metadata.getColumnCharacterSet(i) + "   "); //encode
    System.out.println();   //key
    
   }
   
   System.out.println("====================表数据=============================");
   Iterator<String> i = null;
   String oneKey = null;
   while(result.next()){
    i = metadataList.iterator();
    while(i.hasNext()){
     oneKey = i.next();
     System.out.print(oneKey + ":" + result.getString(oneKey) + "    ");
    }
    System.out.println();
   }
   
   result.close();
   statement.close();
   con.close();
   
  } catch (ClassNotFoundException e) {
   e.printStackTrace();
  } catch (SQLException e) {
   e.printStackTrace();
  }
  
 }

}