备份mysql数据库或表
命令 mysqldump
常用参数详解
1 | -u 用户名 |
Xshell连接Ubuntu
连接操作
https://blog.csdn.net/lianghe_work/article/details/47340141
遇到的问题
- sudo apt-get install openssh-server报错
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15ll@ubuntu:~$ sudo apt-get install openssh-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
openssh-server : Depends: openssh-client (= 1:7.2p2-4ubuntu2.8)
Depends: openssh-sftp-server but it is not going to be installed
Recommends: ssh-import-id but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
解决办法 sudo apt-get install openssh-client=1:7.2p2-4ubuntu2.8
执行以上命令后在执行安装就可以了， 不过要和以上报错的版本对应
- root用户无法登陆
- 在其他用户下切换sudo su root切换到root用户
- vi /etc/ssh/sshd_config
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3<!-- 加一句去一句 -->
PermitRootLogin yes
# PermitRootLogin prohibit-password - /etc/init.d/ssh restart 来重启ssh服务
- /usr/bin/xauth: file /root/.Xauthority does not exist
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4vi /etc/ssh/sshd_config
添加 AllowAgentForwarding yes
/etc/init.d/ssh restart 来重启ssh服务 - Ubuntu 输入正确的密码后重新返回到登陆界面
Spring/Spring的单元测试
使用步骤
- 导包： Spring单元测试包spring-test-4.0.0.RELEASE.jar
- @ContextConfiguration(locations=””)来指定Spring的配置文件
- @RunWith指定用哪种驱动进行单元测试，默认JUnit
@RunWith(SpringJUnit4ClassRunner.class)
使用Spring的单元测试模块来执行标了@Test的测试方法
好处是不需要获取Bean1
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13@ContextConfiguration(locations="classpath:ioc.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringIOCTest {
ApplicationContext ioc = null;
@Autowired
BookServlet bookServlet;
@Test
public void test() {
System.out.println("--"+bookServlet);
}
}
Spring IOC实验
实验1：通过IOC容器创建对象，并为属性赋值★
实验2：根据bean的类型从IOC容器中获取bean的实例★
如果IOC容器这个类型的bean有多个，查找会报错
报错org.springframework.beans.factory.NoUniqueBeanDefinitionException
1 | /*Person bean = ioc.getBean(Person.class); |
