jdbcTemplate 获取数据表结构

jdbcTemplate 操作方法

Java代码



/**

*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

Java代码



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();

}

}

}