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README.md

MiniDao

MiniDao简介及特征

MiniDao是一种持久化解决方案,具备实体维护和SQL分离的两大优势,考虑了mybatis和hibernate的不足。 具有以下特征:

  • 1.O/R mapping不用设置xml,零配置便于维护
  • 2.不需要了解JDBC的知识
  • 3.SQL语句和java代码的分离
  • 4.可以自动生成SQL语句
  • 5.接口和实现分离,不用写持久层代码,用户只需写接口,以及某些接口方法对应的sql 它会通过AOP自动生成实现类
  • 6.支持自动事务处理和手动事务处理
  • 7.支持与hibernate轻量级无缝集成
  • 8.MiniDao吸收了Hibernate+mybatis的优势,支持实体维护和SQL分离
  • 9.SQL支持脚本语言

※实体的增删改查不需要写sql,支持SQL自动生成

###接口和SQL文件对应目录 github

接口定义[EmployeeDao.java]

@MiniDao
public interface EmployeeDao {
 @Arguments("employee")
 public List<Map> getAllEmployees(Employee employee);

 @Arguments("empno")
 Employee getEmployee(String empno);

 @Arguments({"empno","name"})
 Map getMap(String empno,String name);

 @Sql("SELECT count(*) FROM employee")
 Integer getCount();

 @Arguments("employee")
 int update(Employee employee);

 @Arguments("employee")
 void insert(Employee employee);

}

SQL文件[EmployeeDao_getAllEmployees.sql]

SELECT * FROM employee where 1=1 
<#if employee.age ?exists>
and age = :employee.age
</#if>
<#if employee.name ?exists>
and name = :employee.name
</#if>
<#if employee.empno ?exists>
and empno = :employee.empno
</#if>

MiniDao接口配置

    <!-- 注册MiniDao接口 -->
<bean class="org.jeecgframework.minidao.factory.MiniDaoBeanFactory">
	<property name="packagesToScan">
		<list>
			<value>examples.dao.*</value>
		</list>
	</property>
</bean>

测试代码

public class Client {
public static void main(String args[]) {
	BeanFactory factory = new ClassPathXmlApplicationContext(
			"applicationContext.xml");
 		
	EmployeeDao employeeDao = (EmployeeDao) factory.getBean("employeeDao");
	Employee employee = new Employee();
	List<Map> list =  employeeDao.getAllEmployees(employee);
	for(Map mp:list){
		System.out.println(mp.get("id"));
		System.out.println(mp.get("name"));
		System.out.println(mp.get("empno"));
		System.out.println(mp.get("age"));
		System.out.println(mp.get("birthday"));
		System.out.println(mp.get("salary"));
	}
}
}

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