Interviewer: what is the difference between SSH and SSM frameworks? How to choose??

2022 The global C++ And system software technology conference | 3 month 11-12 Japan · Shanghai Click to learn more 》>>>

source ：blog.csdn.net/horero/article/details/54236833

I have used SSH Frame for a while , Finally, when optimizing the project, decide to use SSM frame , Here are some simple differences between the two frameworks .

SSH The frame is Struts+Spring+Hibernate and SSM It means Spring-MVC+Spring+MyBatis, Just from these two abbreviations, you can see , If we compare the differences between the two, we mainly compare Struct and Spring-MVC as well as Hibernate and MyBatis.

SpringMVC contrast Struts

1. Struts and Spring-MVC Are responsible for receiving and forwarding , But both are aimed at request Your request is very different ,Struts It's about a Action Class to make the request , That is, a Action Corresponds to a request class , So class interception , The requested data class is shared . and Spring-MVC For method level requests , That is, a method corresponds to a request , It belongs to method interception , The requested data method is not shared .
2. Spring-MVC There are relatively few configuration files , Easy to use , It can accelerate the speed of software development , Experience effectively .
3. Spring-MVC The entrance to is Servlet Level and Struts The level of is Filter Grade .

Hibernate contrast MyBatis

in the light of Hibernate and MyBatis Operate on persistent classes , The differences between them can be sorted out as follows ：

1. Hibernate It's a kind of O/R Relational type , That is to complete the mapping between database tables and persistent classes , and MyBatiss It's for you SQL-Maping, Personal understanding is a kind of Hibernate After encapsulating the database , You can call the corresponding database operation statement HQL, and MyBatis It uses the original database operation statement .
2. be based on 1 The reason in , be Hibernate Optimization is relatively MyBatis More difficult .
3. MyBatis Getting started faster , and Hibernate It's relatively difficult to master .
4. For advanced queries ,Mybatis It needs to be written manually SQL sentence , as well as ResultMap. and Hibernate There is a good mapping mechanism , Developers don't need to care SQL Generation and result mapping of , You can focus more on business processes .
5. Hibernate Database portability is good ,MyBatis Database portability is not good , Different databases require different writes SQL.

Summary

summary ：SSH Although I feel very heavy , But for understanding MVC Model even IOC It's not bad , It's quite suitable for practicing , however SSM It makes people feel fast , No matter for OOP Or face AOP Programming , It gives people a transparent pleasure .

Recent hot article recommends ：

1.1,000+ Avenue Java Arrangement of interview questions and answers (2022 The latest version )

2. Explode ！Java Xie Cheng is coming ...

3.Spring Boot 2.x course , It's too complete ！

4.20w Programmer red envelope cover , Get it quickly ...

5.《Java Development Manual （ Song Mountain version ）》 The latest release , Download it quickly ！

I think it's good , Don't forget to like it + Forward ！