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QueryRunner类结果集处理的八种方法
在连接数据库的时候(MySQL)时,会遇到的问题。 调用QueryRunner的方法是: query(Connection con,String Sql,ResultSetHandler r,Object.params) MapListHandler 将结果集每一行存储到Map集合中,键:列名;值: ...
分类:其他好文   时间:2020-11-11 16:51:56    阅读次数:25
blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'
Last_IO_Errno: 1129 Last_IO_Error: error connecting to master 'slavetest@xxx.xxx.xxx.xx:6612' - retry-time: 60 retries: 1 message: Host 'xxx.xxx.xxx.x ...
分类:数据库   时间:2020-11-10 11:23:28    阅读次数:13
Cannot initiate the connection to ports.ubuntu.com:80
root@pcl-01:/usr/share/defaults/kata-containers# qemu-system-aarch64 -vqemu-system-aarch64: error while loading shared libraries: librbd.so.1: cannot ...
分类:系统相关   时间:2020-11-04 17:41:12    阅读次数:35
10.22补题
E Nothing is eternal in the world, Kostya understood it on the 7-th of January when he saw partially dead four-color garland. Now he has a goal to rep ...
分类:其他好文   时间:2020-11-02 10:34:31    阅读次数:23
centos7 网卡配置错误问题解决办法(ifcfg-Wired_connection_1)
centos7 网卡配置错误问题解决办法(ifcfg-Wired_connection_1)
分类:其他好文   时间:2020-11-01 21:01:05    阅读次数:17
JDBC Template
query(new BeanPropertyRowMapper<T>(T.class)); JDBC连接mysql数据库,执行更新sql指令的一般顺序如下(密码和sql语句略去) 1 package cn.gao.jdbc; 2 3 import java.sql.Connection; 4 imp ...
分类:数据库   时间:2020-11-01 20:43:17    阅读次数:17
redis工具类
package redis.config; import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.redis.connection.DataType;import o ...
分类:其他好文   时间:2020-10-31 02:05:49    阅读次数:14
116. Populating Next Right Pointers in Each Node 连接右节点
You are given a perfect binary tree where all leaves are on the same level, and every parent has two children. The binary tree has the following defin ...
分类:其他好文   时间:2020-10-27 11:41:41    阅读次数:23
leetcode198 - House Robber - easy
You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping yo ...
分类:其他好文   时间:2020-10-27 10:55:44    阅读次数:21
mybaties
Mybaties介绍 MyBatis是一个优秀的持久层框架,它对jdbc的操作数据库的过程进行封装,使开发者只需要关注 SQL 本身,而不需要花费精力去处理例如注册驱动、创建connection、创建statement、手动设置参数、结果集检索等jdbc繁杂的过程代码。Mybatis通过xml或注解 ...
分类:其他好文   时间:2020-10-26 11:46:25    阅读次数:43
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