Discuss / Java / 练习

练习

Topic source
//请使用StringJoiner构造一个SELECT语句:
public class Main {

	public static void main(String[] args) {
		String[] fields = { "name", "position", "salary" };
		String table = "employee";
		String select = buildSelectSql(table, fields);
		System.out.println(select);
		System.out.println("SELECT name, position, salary FROM employee".equals(select) ? "测试成功" : "测试失败");
	}

	static String buildSelectSql(String table, String[] fields) {
		// TODO:
		var sj = new StringJoiner(", ","SELECT "," FROM "+table);
		for(String f: fields) {
			sj.add(f);
		}
		return sj.toString();
	}

}

  • 1

Reply