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README.md

MiniDao

MiniDao简介及特征

MiniDao是Jeecg自己的持久化解决方案,集成了Hibernate实体维护和Mybaits SQL分离的两大优势。 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整合了Hibernate+mybatis的两大优势,支持实体维护和SQL分离
  • 9.SQL支持脚本语言

※向下兼容Hibernate实体维护方式,实体的增删改查SQL自动生成

###接口和SQL文件对应目录 github

接口定义[EmployeeDao.java]

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>

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"));
	}
}
}

技术交流

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