1 version of the software to be aligned
- java
- Intellij IDEA Ultimate
- Maven
- SpringBoot
2.1.7 (absolutely necessary)
2 New Application
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Make sure your normal scientific means of access
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Only modified within the scope of the sign
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Sb attention may not find the version number 2.1.7, the first default, after another change, currently only check the Spring Web
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Configured as a local path maven
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Revised to version 2.1.7
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IDEA (development is the process)
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Java Command (Deployment is the final result & debugging)
3 MyBatis VS PSD
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JPA is the trend
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Mybatis is the status of domestic
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Version correspondence table
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Maven installation
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Mybatis just persistence layer framework, we also need to connect to database database-driven, do not need to pay attention to the specified version, sb starer good version has been specified
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Then, naturally the configuration database
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New pojo package
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New dao layer
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Test unit not forget
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Database field values
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However, we have to check is null field
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Because Java hump name, and the database name is underlined division, resulting in a mismatch, but fortunately for us has been resolved mybatis
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There is value it!
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If there are a lot mapper class, it does not explicitly require each comment @Mapper, add annotations in the Scan category to start
xml statement
- Note that the specified file path mapper
