1 package org.smart4j.framework.org.smart4j.framework.util;
 2  
 3 import org.slf4j.Logger;
 4 import org.slf4j.LoggerFactory;
 5 import java.lang.reflect.Field;
 6 import java.lang.reflect.Method;
 7  
 8 /**
 9  * Created by jack on 2017/5/23.
10  * 放射工具类
11  */
12 public class ReflectionUtil {
13     private static final Logger LOGGER = LoggerFactory.getLogger(ReflectionUtil.class);
14  
15     /**
16      * 创建实例
17      */
18     public static Object newInstance(Class<?> cls) {
19         Object instance;
20         try {
21             instance = cls.newInstance();
22         } catch (Exception e) {
23             LOGGER.error("new instance failue", e);
24             throw new RuntimeException(e);
25         }
26         return instance;
27     }
28  
29     /**
30      * 调用方法
31      */
32     public static Object invokeMethod(Object obj, Method method, Object... args) {
33         Object result;
34         method.setAccessible(true);
35         try {
36             result = method.invoke(obj,args);
37         } catch (Exception e) {
38             LOGGER.error("invoke method failure",e);
39             throw new RuntimeException(e);
40         }
41         return result;
42     }
43  
44     /**
45      * 设置成员变量的值
46      */
47     public static void setField(Object obj, Field field,Object value){
48  
49         try {
50             field.setAccessible(true);
51             field.set(obj,value);
52         } catch (IllegalAccessException e) {
53             LOGGER.error("set field failue",e);
54             throw new RuntimeException(e);
55         }
56     }
57 }

 1 package org.smart4j.framework.helper;
 2  
 3 import org.smart4j.framework.org.smart4j.framework.util.ReflectionUtil;
 4  
 5 import java.util.HashMap;
 6 import java.util.Map;
 7 import java.util.Set;
 8  
 9 /**
10  * Created by jack on 2017/5/23.
11  * bean 助手类
12  */
13 public class BeanHelper {
14     /**
15      * 定义bean映射，（用于存放bean类与bean实例的映射关系）
16      */
17     private static final Map<Class<?>,Object> BEAN_MAP = new HashMap<Class<?>, Object>();
18  
19     /**
20      * 静态代码块
21      */
22     static {
23         Set<Class<?>> beanClassSet = ClassHelper.getBeanClassSet();
24         for (Class<?> beanClass : beanClassSet) {
25             Object object = ReflectionUtil.newInstance(beanClass);
26             BEAN_MAP.put(beanClass,object);
27         }
28     }
29  
30     /**
31      * 获取Bean映射
32      */
33     public static Map<Class<?>,Object> getBeanMap(){
34         return BEAN_MAP;
35     }
36  
37     /**
38      * 获取Bean实例
39      */
40     public static <T> T getBean(Class<?> cls){
41         if (!BEAN_MAP.containsKey(cls)){
42             throw new RuntimeException("can not get bean by class:"+cls);
43         }
44         return (T) BEAN_MAP.get(cls);
45     }
46 }