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1, View View is a virtual table (non real). Its essence is to obtain a dynamic data set according to SQL statements and name it. When using, users only need to use the name to obtain the result set, which can be used as a table. Using the view, we can pick out the temporary table in the query process and implement it with the view. In t ...

https://blog.didispace.com/spring-boot-learning-1x/ 1. Unified exception handling of application Spring Boot provides a default mapping: / error. When an exception is thrown during processing, it will be transferred to the request for processing, and the request has a global error page to display the exception content. Access a nonexistent U ...

1. jdbcTemplate 1.1 basic concepts JdbcTemplate is a template object provided in the spring framework. It is a simple encapsulation of the original cumbersome Jdbc API object Core object JdbcTemplate jdbcTemplate = new JdbcTemplate(DataSource dataSource); Core method Execute addition, deletion and modification statements int update(); / ...

Transaction introduction The previous article introduced spring AOP. Spring transaction is a typical application of spring AOP. Transaction is the database transaction, which means that the reading and writing of data in the same batch are either all successful or all failed to ensure the consistency of data. It is the core function of th ...

1. Required (default) Meaning: use the current transaction. If there is no transaction, create a new transaction. The sub method must run in a transaction; If there is a transaction, join the transaction as a whole. For example: if the leader has no food, I have money, I will buy it myself and eat it myself; If some leaders eat, they will shar ...

Recommended - seata Official website: https://seata.io/zh-cn/ Seata currently has three distributed transaction implementation schemes: AT, TCC and SAGA AT mode mainly focuses on the data consistency of multi DB access. Of course, it also includes the 2PC improvement of multi DB data access consistency under multi servicesTCC mode mainly foc ...

Original website: brief introduction         This paper introduces the transaction propagation mechanism in Spring, and illustrates its usage with an example.         This content is also a common question in Java back-end interview. summary         Spring specifies seven types ...

Problem Description Message middleware is a component commonly used in distributed systems and is widely used in asynchronization, decoupling and peak-clipping of systems.Message middleware is generally considered a reliable component, that is, messages are not lost as long as they are delivered to the message middleware. Therefore, it ca ...