数据库 query string 允许最多有几个字符

String[] data = new String[8];//用于操作表内数据行的data数组，元素个数要与table的列的数量相一致
sql= "select name,number,area,price,room,acreage,fishing,mating from message";
try{
rs=stmt.executeQuery(sql);
while (rs.next()) {
data[0] = rs.getString(1).trim();
data[1] = rs.getString(2).trim();
data[2] = rs.getString(3).trim();