基于Java反射的map自动装配JavaBean工具类设计示例代码

public list<role> findroles(map<string,object> param);

<select id= "dindroles" parametertype= "map" resulttype= "role" >

   select id,role_name as rolename,note form t_role

   where role_name = #{rolename}

   and note = #{note}

</select>

//我们常常需要手打这些字段名

map<string,object> map = new hashmap<>();

map.put( "rolename" , "xiaoming" );

map.put( "note" , "10" );

list<role> roles = rolemapper.findroles(map);

public class test {

   //实现效果

   public static void main(string[] args) {

     hashmap<string, object> map = new hashmap<>();

     person person1 = new person();

     person1.setage( 2 );

     person1.setname( "foonsu" );

     //调用写好的mapbuild自动装配

     mapbuild(person1, map);

     //输出效果

     for (map.entry entry : map.entryset()) {

       system.out.println(entry.getkey() + ":" + entry.getvalue());

     }

   }

   public static void mapbuild(object javabean, map map) {

     class clazz = javabean.getclass();

     //反射获取

     field[] name = clazz.getdeclaredfields();

     for (field field : name) {

       //将非null的javabean属性值装配到map中

       if (getgetmethod(javabean,field.getname())!= null )

         map.put(field.getname(), getgetmethod(javabean,field.getname()));

     }

   }

   /**

    * 根据属性，获取get方法

    */

   public static object getgetmethod(object ob, string name) {

     method[] m = ob.getclass().getmethods();

     try {

       for ( int i = 0 ; i < m.length; i++) {

         if (( "get" + name).tolowercase().equals(m[i].getname().tolowercase())) {

           return m[i].invoke(ob);

         }

       }

     } catch (exception e) {

     }

     return null ;

   }

}

class person{

   int age;

   string name;

   string personid;

   public string getpersonid() {

     return personid;

   }

   public void setpersonid(string personid) {

     this .personid = personid;

   }

   public int getage() {

     return age;

   }

   public void setage( int age) {

     this .age = age;

   }

   public string getname() {

     return name;

   }

   public void setname(string name) {

     this .name = name;

   }

}