nhmicro框架Map与bean映射（orm机制）

nhmicro框架中dao层操作为了保证灵活性和可扩展性，输入输出均为map，但开发人员比较熟悉使用bean作为dao层输入输出。使用micro-orm.jar中的MicroBeanMapUtil和MicroMappingAnno实现map与bean相互映射。维持灵活性的同时，也向开发人员编程习惯靠拢，并间接实现了编译时字段约束和检查。

 

Bean中使用@MicroMappingAnno说明map对应的key

public class TestBean {   @MicroMappingAnno(name="user_id")   private Integer userId;   @MicroMappingAnno(name="user_name") private String userName;   @MicroMappingAnno(name="user_age")  private Integer userAge;   public Integer getUserId() {     return userId; } public void setUserId(Integer userId) {     this.userId = userId; } public String getUserName() {     return userName; } public void setUserName(String userName) {     this.userName = userName; } public Integer getUserAge() {     return userAge; } public void setUserAge(Integer userAge) {     this.userAge = userAge; }     }

 

代码中使用MicroBeanMapUtil.beanToMap将bean转为map，使用MicroBeanMapUtil.mapToBean将map转为bean，注意map中的值均为string类型。

public static void main(String[] args) throws Exception {         TestBean testBean=new TestBean();         testBean.setUserAge(20);         testBean.setUserId(123);         testBean.setUserName("tom");         Map beanMap=MicroBeanMapUtil.beanToMap(testBean);         System.out.println("bean to map="+beanMap);                 Map paramMap=new HashMap();         paramMap.put("user_id", "678");         paramMap.put("user_name", "jerry");         paramMap.put("user_age", "33");         TestBean mapBean=(TestBean) MicroBeanMapUtil.mapToBean(paramMap, TestBean.class);         System.out.println("map to bean="+mapBean);     }