public class MySqlClient {InputStreamReader in = new InputStreamReader(System.in);BufferedReader br = new BufferedReader(in);String sql = "";

来源：学生作业帮助网编辑：作业帮时间：2024/05/14 03:11:55

public class MySqlClient {
InputStreamReader in = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(in);
String sql = "";

把输入的作为参数,构建一个读取数据用的InputStreamReader流.然后再把刚才构建的流对象做个包装,包装成BufferedReader流最后把它赋值给br