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手写一个数据库连接池，代码如下： 1、JDBC获取链接 public class ConnectionResource { private static String url = "jdbc:mysql://localhost:3306/test02"; private static String username = "root"; private static ...

模拟Jdbc在高并发的情况下出现如下异常的情况： com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections" 代码如下： ...