重复执行多次查询表功能会报错是为什么呢

() {
    Properties properties=Properties()String propertyFile = SelectCommand..getResource().getPath(){
        propertyFile=URLDecoder().(propertyFile)properties.load(FileInputStream(propertyFile))DataSource dataSource= DruidDataSourceFactory.(properties)QueryRunner qr=QueryRunner(dataSource)List<News> list=qr.query(BeanListHandler<>(News.))(list.size()==){
            System..println()}{
            (News emp:list){
                System..println(emp)}
        }
    } (Exception e) {
        System..println()e.printStackTrace()}
}

十一月 18, 2021 10:39:33 下午 com.alibaba.druid.pool.DruidDataSource error

严重: init datasource error, url: jdbc:mysql://localhost:3306/imooc?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true

java.sql.SQLNonTransientConnectionException: Data source rejected establishment of connection,  message from server: "Too many connections"

十一月 18, 2021 10:39:46 下午 com.alibaba.druid.pool.DruidDataSource error

严重: create connection SQLException, url: jdbc:mysql://localhost:3306/imooc?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true, errorCode 1040, state 08004

java.sql.SQLNonTransientConnectionException: Data source rejected establishment of connection,  message from server: "Too many connections"