为了避免持久化的逻辑分散到应用的各个组件中,将数据访问功能放到一个或多个专注于此项任务的组件中,这样的组件通常称为数据访问对象(DAO)或Repository. 为了避免应用与特定的数据访问策略耦合在一起,编写良好的Repository应该以借口的方式暴漏功能.通过接口来访问Repository可以为这些数据访问接口创建mock实现,提升单元测试的效率. SQLException表示在尝试访问数据库时出现了问题,但这个异常却没有告诉你哪里出错了以及如何进行处理. 可能导致抛出SQLExcepti…

http://blog.jobbole.com/100349/ http://coding-geek.com/how-databases-work/…

资料 网址 官方介绍 https://help.aliyun.com/document_detail/26092.html?spm=5176.2020520104.0.0.2b4b1450yqd1gg 首次连接访问RDS需要配置IP白名单 https://help.aliyun.com/document_detail/43185.html?spm=a2c4g.11186623.2.10.2d2031fcqOxqxu#concept-pdr-k2f-vdb 连接MySQL实例 https://he…

Spring Batch Concepts Chapter The below figure shows two kinds of Spring Batch components:infrastructure components and application components. The infrastructure componentsare the job repository and the job launcher. Spring Batch provides implementa…

一. 1.定义接口 Suppose that you need to authenticate against users in a non-relational database suchas Mongo or Neo4j. In that case, you’ll need to implement a custom implementationof the UserDetailsService interface. public interface UserDetailsService {…

一. 1.It’s quite common for user data to be stored in a relational database, accessed via JDBC . To configure Spring Security to authenticate against a JDBC -backed user store,you can use the jdbcAuthentication() method. The minimal configuration requ…

Spring Security is extremely flexible and is capable of authenticating users against virtually any data store. Several common user store situations—such as in-memory, relational database, and LDAP —are provided out of the box. But you can also create…

Now that we have a high-level overview of the Spring Security architecture and its core classes, let’s take a closer look at one or two of the core interfaces and their implementations, in particular the AuthenticationManager, UserDetailsService and…

Introduction:介绍 This is the user guide for the support for OAuth 2.0. For OAuth 1.0, everything is different, so see its user guide. This user guide is divided into two parts, the first for the OAuth 2.0 provider, the second for the OAuth 2.0 client.…

While it's common to use the Java Transaction API and the XA protocol for distributed transactions in Spring, you do have other options. The optimum implementation depends on the types of resources your application uses and the trade-offs you're will…