if you write your own class, you can understand how to inject it, but how to inject a class that comes with java, such as File File file = new File (filePath) like this? and what if the filePath is calculated while the program is running? this is j...
< H2 > pol.xml < H2 > <build> <plugins> <plugin> <groupId>org.springframework.boot< groupId> <artifactId>spring-boot-maven-plugin< artifactId> <...
has the following code: public class Test{ @Autowired private Dao dao; @Autowired private Service service; @Transactional(propagation=Propagation.REQUIRED,rollbackForClassName="Exception") ...
to make a recharge diamond system, I have no experience. I would like to ask the gods to make recharge records and expense records in one table, or separately from two tables? What are the advantages and disadvantages of each? ...
1. Vue2 is learning to encounter a problem in the execution process is to select a column in Table click to edit and then pop up the modal box, put the contents of the column into the modal box, but reported an error: [Vue warn]: Invalid prop: type chec...
A SpringBoot project will call a client program implemented in Netty when an address is accessed. The client will communicate with the server also implemented in Netty and get the result, and then return the result in Json format. This is the whole proc...
< H2 > error < H2 > intellij web UserController UserMapper User jdbc pom.xml sql dao.UserMapper controller.UserController Demo10Application ...
A question that comes to mind when looking at the Spring source code * * Copyright 2002-2004 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compli...
see the use of the PageHelper paging plug-in in a project ...
Spring boot form validation @ Validated message internationalization resource files must be placed in resources ValidationMessages.properties by default. now I want to put the resource file in resources i18n validation message.properties . How ca...
similar to the constructor of PHP, the constructor executes each time it is called. in JAVA, in addition to using annotations, how to achieve a similar function, that is, when you access a routing function through URL, you will first execute the speci...
encountered a problem today I have a system, which is role-based permission control. the front end naturally controls the view that should be displayed according to the role. but in order to prevent others from directly using httpclient access, then...
how to set bean is not required messageSource this bean is not required, and the Spring container can be started when messageSource injection fails. Is there this option in Spring s xml configuration file, or is there any other way to solve th...
Which method of HIbernate is more appropriate to use in the SQL statement select name,sex from db, for example: public T findByID (ID id, I dbName) throws Exception; public List<T> findAll(I dbName) throws Exception; public List<T> findBy...
divided into two parts, the first part, let s take a look at the error message , the second part, look at the code logic . part I: error message: GoShopping :: Entity DAO DAO Mapper in namespace in mapper, there is no such path as s...
mybatis input parameter is a list of type integer if there is only a 0 in the list, do not Filter this property otherwise, this field in list ...
1. Problem description the project is built using maven, and the configuration files are placed under src main resources. because there are frequent changes to the web.xml configuration during project development, the project manager uses variables (s...
for example, the fixedRate of a scheduled task is 5 seconds, but sometimes the task executes for more than 5 seconds. What about the next execution of the task? or cron starts to do a task in 5 seconds per minute, but if the task takes more than 1 min...
configuration file of how application.yaml in SpringBoot is referenced. spring: datasource: druid: url: ${jdbc.url} username: ${jdbc.username} where jdbc.url , jdbc.username is in another file jdbc.yaml . how ...
the console output is as follows, with no error: D: apache-tomcat-8.0.30 bin catalina.bat run [2018-04-26 02:19:05,295] Artifact PersonAnalysisBS:war exploded: Waiting for server connection to start artifact deployment... Using CATALINA_...
operating environment: MacOS 10.13.6 launch php-fpm Times error content: [18-Aug-2018 22:43:11] ERROR: No pool defined. at least one pool section must be specified in config file [18-Aug-2018 22:43:11] ERROR: failed to post process the configuration [...
defines an array days,. When I changed the value of this.day1 in the array, the value of days did not change. Is there any way to make elements in days an array address reference? Hopefully, when day1 changes, so does the value of days [0]. this.d...
the cause of the problem recently, when you set up a npm private server, it was no problem to download the project dependency package locally, but you will fail to install node-sass on the server. Although cnpm can be used to solve the problem, privat...
background: 1. Mobile 2. For example, column chart, several columns are uncertain, there may be one, there may be many, text tilting display is a solution, but when there are few columns, such as a column, the leader says that showing a slanted fo...
problem description has anyone encountered any of the above questions? it s strange that sudoers has added oracle ALL= (ALL) ALL, but still doesn t have any permissions . the environmental background of the problems and what methods you have tried ...