Spring详细内容-Spring ORM Frameworks En（6）

阳光穿透心脏的1/2处 2023-09-24 19:24 115阅读 0赞

1.Spring ORM Frameworks

  • Spring provides API to easily integrate Spring with ORM frameworks such as Hibernate,PA(Java Persistence API), JDO(Java Data Objects), Oracle Toplink and iBATIS

Advantage of ORM Frameworks with Spring

  • Less coding is required: By the help of Spring framework, you don’t need to write extra codes before and after the actual database logic such as getting the connection, starting transaction, commiting transaction, closing connection etc.
  • Easy to test: Spring’s IoC approach makes it easy to test the application.
  • Better exception handling: Spring framework provides its own API for exception handling with ORM framework.
  • Integrated transaction management: By the help of Spring framework, we can wrap our mapping code with an explicit template wrapper class or AOP style method interceptor.

2. Spring Expression Language (SPEL)

  • SpEL is an exression language supporting the features of querying and manipulating an object graph at runtime.
  • SpEL API
    The SpEL API provides many interfaces and classes.
    Expression interface
    SpelExpression class
    ExpressionParser interface
    SpelExpressionParser class
    EvaluationContext interface
    StandardEvaluationContext class

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