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原创 Mybatis search by using a date

Here’s today’s task: the front end only gave me a date parameter with a default time:createTime: “2021-07-11 00:00:00”. What I needed to do was getting rid of the time, use the date as the search parameter to searth this date’s data. So the mybatis can be

2021-07-12 14:45:58 233

原创 Something about @JsonFormat

Firstly I use @JsonFormat to format a date which was selected from the database, like this: @JsonFormat(shape= JsonFormat.Shape.STRING, pattern="yyyy-MM-dd HH:mm:ss") private Date createTime; Then I realized that the return value to the front end is wrong

2021-06-21 17:47:23 162

原创 Fuzzy Search, MySql MAX, GROUP BY and ORDER BY funtion

When you need a fuzzy seach funciton which only shares one search bar: <select id="selectAllProducts" resultMap="ProductResult"> select id, product_no, name, type, unit, brand, remark from product_info where 1=1 <if test="(appSearc

2021-05-31 16:06:59 222

原创 How to Git Reset and push to the remote branch

If I have already push my code to a remote branch, how to reset it into the previous version? Firstly, Git Reset your local branch. I use IDEA’s Git Reset function, Hard mode. Then, use git bash tool to putin “git push --force”. Check the local branch nam

2021-01-05 10:54:30 230

原创 @GeneratedValue(generator = “JDBC“)

If the primary key is self increment, you have to add @GeneratedValue(generator = “JDBC”) on your entity’s field. Otherwise, the primary key can be got if you want to use it again.

2020-11-11 15:36:28 3204 1

原创 IDEA Maven Local Configuration

1 Your local maven directory 2 Settings file in your local MAVEN directory, notice: MAVEN directory. 3 Your local repository url 4 You have to put a SAME settings file into your local repository directory, like this:

2020-09-23 09:45:00 325

原创 Compare The First Chinese Character And Make A Positive Sequence List

If the first character is Chinese, make a positive sequence list and make pages. private String getListInPages(Page<RoomDeviceTypeEntity> page, JSONObject pageObject, List<RoomDeviceTypeEntity> list) { Comparator comparator = Collat

2020-09-21 15:27:47 202

原创 Redisson Jar package Confict

This problem confused me. Even more exprienced coders in my team couldn’t say why. Here is the problem description: I pulled the code into my machine and didn’t change anything and I couldn’t run it locally, however, my co-workers could. So I tracked down

2020-09-16 10:20:43 540

原创 How to not register eureka when starting a module

Put following command into Edit Configuration/VM options: -Deureka.client.register-with-eureka=false

2020-09-14 15:23:00 145

原创 Clone And Set Up Your First Project From GitLab into IDEA

Set Up GitSSH 1. Initialize git username and email This is the global setting git config --global user.name "XXX" git config --global user.email "xxx@eeee.com" 2. Create SSH $ ssh-keygen -t rsa -C "your_email@163.com" press enter key if you are comfort

2020-09-14 11:53:22 177

原创 How To Remote Debug

sudo java -Xdebug -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5555 -jar ./xxxx.jar >>xxxxx.log

2020-09-11 10:31:01 275

原创 How to avoid Index Out Of Boundary Exeption

1. Use fori iterate, get the index 2. current index has to less than list size minus one For example: [1,2,3,4,5] size is 5 Index (4) is the last element, which is 5 So index number has to be less than 4, which is the (size -1) if (deviceInfos.size() -1

2020-09-09 18:09:21 187

原创 Start a jar file under Linux system

1 package and put your jar file onto the server, Xshell with “rz” command would be very simple. by the way, “sz” for download 2 jar package starts up and output log file sudo nohup java -jar ./xxxx.jar >xxxxx.log 2>&1 & if you don’t want to w

2020-09-09 17:39:40 148

原创 How To Print MyBatis SQL

How To Print MyBatis SQL SpringBoot properties file shoule be written like this: logging.level.com.test.example.dao = debug mybatis.configuration.log-impl = org.apache.ibatis.logging.stdout.StdOutImpl notice: the second configuration is important! Otherwis

2020-09-09 11:22:47 183

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