java中的if语句为什么不执行？

public boolean equal(String name,String mima,String sql) throws SQLException
{
boolean yes =false;
if(name!=null&&name!="")
{
Statement statement = this.connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
ResultSet resultset = statement.executeQuery(sql); //执行数据查询SELECT语句

resultset.beforeFirst(); //移动指针到第一行之前
while(resultset.next()) //获得每列数据
{
if((name.equals(resultset.getString(1)))&&(mima.equals(resultset.getString(2))))
{
yes=true;
break;
}
System.out.println(name);
System.out.println(mima);