import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
public class ReadDB {
public List<String> query() {
Connection conn = null;
PreparedStatement stmt = null;
ResultSet rs = null;
String sql = " select * from compare; ";
List<String> mapList = new ArrayList<String>();
try
{
conn = DBHelper.getConnection();
stmt = conn.prepareStatement(sql);
rs = stmt.executeQuery();
while(rs.next())
{
mapList.add(rs.getString("id"));
}
return mapList;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
finally
{
if(rs!=null)
{
try
{
rs.close();
rs = null;
}
catch (Exception e)
{
e.printStackTrace();
}
}
if(stmt!=null)
{
try
{
stmt.close();
stmt = null;
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}
}
java原生jdbc读取mysql数据库的数据
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转载自blog.csdn.net/qq_29777207/article/details/81629526
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