查询:
String sql = "SELECT " + Joiner.on(",").join(columns) + " FROM " + table + " WHERE 1=1";
写入:
String table="table";
String insertSql = String.format("INSERT INTO %s(%s) VALUES(%s)",
table,Joiner.on(",").join(list), "值");
String sql=String.format(insertSql);
System.out.println(sql);
输出:INSERT INTO table(one,two,three,four) VALUES(值)