anderx 4 年之前
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e4274fa429
共有 1 個文件被更改,包括 132 次插入0 次删除
  1. 132 0
      src/main/java/com/kede/common/utils/MapUtils.java

+ 132 - 0
src/main/java/com/kede/common/utils/MapUtils.java

@@ -0,0 +1,132 @@
+package com.kede.common.utils;
+
+import java.beans.BeanInfo;
+import java.beans.Introspector;
+import java.beans.PropertyDescriptor;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+ 
+ 
+/**
+ * Map工具类
+ *
+ */
+public class MapUtils {
+ 
+    /**
+     * 从map集合中获取属性值
+     * 
+     * @param <E>
+     * @param map  map集合
+     * @param key  键对
+     * @param defaultValue 默认值
+     * @return
+     */
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public final static <E> E get(Map map, Object key, E defaultValue) {
+        Object o = map.get(key);
+        if (o == null)
+            return defaultValue;
+        return (E) o;
+    }
+    
+    /**
+     * Map集合对象转化成 JavaBean集合对象
+     * 
+     * @param javaBean JavaBean实例对象
+     * @param mapList Map数据集对象
+     * @return
+     */
+    @SuppressWarnings({ "rawtypes" })
+    public static <T> List<T> map2Java(T javaBean, List<Map> mapList) {
+        if(mapList == null || mapList.isEmpty()){
+            return null;
+        }
+        List<T> objectList = new ArrayList<T>();
+        
+        T object = null;
+        for(Map map : mapList){
+            if(map != null){
+                object = map2Java(javaBean, map);
+                objectList.add(object);
+            }
+        }
+        
+        return objectList;
+        
+    }
+    
+    /**
+     * Map对象转化成 JavaBean对象
+     * 
+     * @param javaBean JavaBean实例对象
+     * @param map Map对象
+     * @return
+     */
+    @SuppressWarnings({ "rawtypes","unchecked"})
+    public static <T> T map2Java(T javaBean, Map map) {
+        try {
+            // 获取javaBean属性
+            BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass());
+            // 创建 JavaBean 对象
+            Object obj = javaBean.getClass().newInstance();
+ 
+            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
+            if (propertyDescriptors != null && propertyDescriptors.length > 0) {
+                String propertyName = null; // javaBean属性名
+                Object propertyValue = null; // javaBean属性值
+                for (PropertyDescriptor pd : propertyDescriptors) {
+                    propertyName = pd.getName();
+                    if (map.containsKey(propertyName)) {
+                        propertyValue = map.get(propertyName);
+                        pd.getWriteMethod().invoke(obj, new Object[] { propertyValue });
+                    }
+                }
+                return (T) obj;
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+ 
+        return null;
+    }
+ 
+    /**
+     * JavaBean对象转化成Map对象
+     * 
+     * @param javaBean
+     * @return
+     */
+    @SuppressWarnings({ "rawtypes", "unchecked" })
+    public static Map java2Map(Object javaBean) {
+        Map map = new HashMap();
+         
+        try {
+            // 获取javaBean属性
+            BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass());
+ 
+            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
+            if (propertyDescriptors != null && propertyDescriptors.length > 0) {
+                String propertyName = null; // javaBean属性名
+                Object propertyValue = null; // javaBean属性值
+                for (PropertyDescriptor pd : propertyDescriptors) {
+                    propertyName = pd.getName();
+                    if (!propertyName.equals("class")) {
+                        Method readMethod = pd.getReadMethod();
+                        propertyValue = readMethod.invoke(javaBean, new Object[0]);
+                        map.put(propertyName, propertyValue);
+                    }
+                }
+            }
+            
+        } catch (Exception e) {
+            e.printStackTrace();
+        }  
+        
+        return map;
+    }
+ 
+}