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resolveDependency() implementation     The previous article analyzed the working principle and source code of byname (bytype) and @ Autowired annotation in Spring. The @ Autowired annotation depends on injection, in which the injection point injection, whether attribute injection or method injection, has the same method org.springframew ...

preface For small partners engaged in java development, the spring framework is certainly familiar. Spring provides developers with a very rich api to meet our daily work needs. If you want to create a bean instance, you can use @ Controller, @ Service, @ Repository, @ Component and other annotations. If you want to inject an object by depen ...

Use feignClient to upload and download files, and compatible with data transmission The communication between microservices can use feign interface to communicate and transfer data content, but if there is file transfer between services, it will be very clumsy to use httpClient to transfer.feign interface actually transmits data through http r ...

3.6,Spring JDBC Template 3.6.1, overview of JdbcTemplate It is an object provided in the spring framework and is a simple encapsulation of the original cumbersome jdbc API objects. The spring framework provides us with a number of operation template classes. For example, Jdbc Template and Hibernate Template for manipulating relational data, R ...

preface The initialization process of IoC container is analyzed in detail. The main work of this initialization process is to establish BeanDefinition data mapping in IoC container. However, the IoC container does not inject Bean dependencies. This article analyzes how to inject Bean dependencies when the IoC container. The main method ca ...

In our daily work, we often encounter the function of operating Excel, such as exporting an Excel report of user information or order information. You must have heard of POI, which can be realized. But the API implemented by POI is really troublesome. It needs to write line by line parsing code (similar to Xml parsing). Today, I recommend a ver ...

preface Spring is already very familiar with spring. Spring container state events are also daily functions, which are often used for decoupling. However, sometimes events will be repeatedly monitored. At this time, they need to be handled. source is also used for special purposes. 1. demo Construct a Spring boot application and write a list ...

After building a complete SSM framework, I test the addition, deletion, modification and query of the database in the test class. The following is the test code: @Test public void insert() { ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml"); EmployeeMapper employeeMappe ...

Servlet is a protocol, framework technology, a set of standards, a set of standards for java web development, and java Dynamic web Framework Technology. Traditional Servlet: accept the user's request, process it, and give the user a response after processing. A Servlet can only receive a corresponding user request, which will lead us to de ...

Initialization of Spring Surprisingly, Spring is no stranger to the core framework in Java, a point that interviewers often ask, and the source code is also the most beautiful framework. The core is IOC and AOP. IOC is simply a container that manages everything together. AOP is dynamic and adds some enhancements when you execute the methods in ...