Commit d4db6732bc6aa318716ba8cb270d16ffa249127d
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添加了两个工具类:数组合并和bean的copy
Showing 2 changed files with 205 additions and 0 deletions
platform-common/src/main/java/com/lyms/platform/common/utils/ArrayUtils.java
View file @
d4db673
| 1 | +package com.lyms.platform.common.utils; | |
| 2 | + | |
| 3 | +import java.lang.reflect.Array; | |
| 4 | + | |
| 5 | +/** | |
| 6 | + * @auther HuJiaqi | |
| 7 | + * @createTime 2016年11月21日 10时14分 | |
| 8 | + * @discription | |
| 9 | + */ | |
| 10 | +public class ArrayUtils { | |
| 11 | + | |
| 12 | + /** | |
| 13 | + * @auther HuJiaqi | |
| 14 | + * @createTime 2016年04月08日 13时10分 | |
| 15 | + * @discription 数组合并,仅支持相同类型的数组合并 | |
| 16 | + */ | |
| 17 | + public static <T> T[] merge(T[] array1, T[] array2) { | |
| 18 | + if ((array1 == null) && (array2 == null)) | |
| 19 | + return null; | |
| 20 | + if ((array2 == null) || (array2.length == 0)) | |
| 21 | + return array1; | |
| 22 | + if ((array1 == null) || (array1.length == 0)) | |
| 23 | + return array2; | |
| 24 | + Class c = array1.getClass().getComponentType(); | |
| 25 | + Object[] array = (Object[]) Array.newInstance(c, array1.length + array2.length); | |
| 26 | + System.arraycopy(array1, 0, array, 0, array1.length); | |
| 27 | + System.arraycopy(array2, 0, array, array1.length, array2.length); | |
| 28 | + T[] result = (T[]) array; | |
| 29 | + return result; | |
| 30 | + } | |
| 31 | + | |
| 32 | +} |
platform-common/src/main/java/com/lyms/platform/common/utils/BeanUtils.java
View file @
d4db673
| 1 | +package com.lyms.platform.common.utils; | |
| 2 | + | |
| 3 | +import java.beans.BeanInfo; | |
| 4 | +import java.beans.Introspector; | |
| 5 | +import java.beans.PropertyDescriptor; | |
| 6 | +import java.io.ByteArrayInputStream; | |
| 7 | +import java.io.ByteArrayOutputStream; | |
| 8 | +import java.io.ObjectInputStream; | |
| 9 | +import java.io.ObjectOutputStream; | |
| 10 | +import java.lang.annotation.*; | |
| 11 | +import java.lang.reflect.Field; | |
| 12 | +import java.util.HashMap; | |
| 13 | +import java.util.Map; | |
| 14 | + | |
| 15 | +/** | |
| 16 | + * @auther HuJiaqi | |
| 17 | + * @createTime 2016年11月21日 10时13分 | |
| 18 | + * @discription | |
| 19 | + */ | |
| 20 | +public class BeanUtils { | |
| 21 | + | |
| 22 | + /** | |
| 23 | + * @auther HuJiaqi | |
| 24 | + * @createTime 2016年04月07日 14时12分 | |
| 25 | + * @discription byte数组转object,建议处理异常 | |
| 26 | + */ | |
| 27 | + public static Object bytesToObject(byte[] b) { | |
| 28 | + try { | |
| 29 | + ByteArrayInputStream bis = new ByteArrayInputStream(b); | |
| 30 | + ObjectInputStream ois = new ObjectInputStream(bis); | |
| 31 | + Object obj = ois.readObject(); | |
| 32 | + ois.close(); | |
| 33 | + bis.close(); | |
| 34 | + return obj; | |
| 35 | + } catch (Exception e) { | |
| 36 | + throw new RuntimeException("byte数组转object异常", e); | |
| 37 | + } | |
| 38 | + } | |
| 39 | + | |
| 40 | + /** | |
| 41 | + * @auther HuJiaqi | |
| 42 | + * @createTime 2016年04月07日 14时14分 | |
| 43 | + * @discription object转byte数组,建议处理异常 | |
| 44 | + */ | |
| 45 | + public static byte[] objectToBytes(Object obj) { | |
| 46 | + try { | |
| 47 | + ByteArrayOutputStream bos = new ByteArrayOutputStream(); | |
| 48 | + ObjectOutputStream oos = new ObjectOutputStream(bos); | |
| 49 | + oos.writeObject(obj); | |
| 50 | + oos.flush(); | |
| 51 | + byte[] b = bos.toByteArray(); | |
| 52 | + oos.close(); | |
| 53 | + bos.close(); | |
| 54 | + return b; | |
| 55 | + } catch (Exception e) { | |
| 56 | + throw new RuntimeException("object转byte数组异常", e); | |
| 57 | + } | |
| 58 | + } | |
| 59 | + | |
| 60 | + /** | |
| 61 | + * @auther HuJiaqi | |
| 62 | + * @createTime 2016年04月07日 14时41分 | |
| 63 | + * @discription map转object,建议处理异常 | |
| 64 | + */ | |
| 65 | + public static Object mapToObject(Class c, Map map) { | |
| 66 | + try { | |
| 67 | + BeanInfo bi = Introspector.getBeanInfo(c); | |
| 68 | + Object obj = c.newInstance(); | |
| 69 | + PropertyDescriptor[] pds = bi.getPropertyDescriptors(); | |
| 70 | + for (PropertyDescriptor pd : pds) { | |
| 71 | + String name = pd.getName(); | |
| 72 | + if (map.containsKey(name)) { | |
| 73 | + pd.getWriteMethod().invoke(obj, map.get(name)); | |
| 74 | + } | |
| 75 | + } | |
| 76 | + return obj; | |
| 77 | + } catch (Exception e) { | |
| 78 | + throw new RuntimeException("map转object异常" + e); | |
| 79 | + } | |
| 80 | + } | |
| 81 | + | |
| 82 | + /** | |
| 83 | + * @auther HuJiaqi | |
| 84 | + * @createTime 2016年04月07日 14时47分 | |
| 85 | + * @discription object转map,建议处理异常 | |
| 86 | + */ | |
| 87 | + public static Map<String, String> objectToMap(Object obj) { | |
| 88 | + try { | |
| 89 | + Class c = obj.getClass(); | |
| 90 | + Map<String, String> map = new HashMap<String, String>(); | |
| 91 | + BeanInfo bi = Introspector.getBeanInfo(c); | |
| 92 | + PropertyDescriptor[] pds = bi.getPropertyDescriptors(); | |
| 93 | + for (PropertyDescriptor pd : pds) { | |
| 94 | + String key = pd.getName(); | |
| 95 | + if (!key.equals("class")) { | |
| 96 | + Object result = pd.getReadMethod().invoke(obj); | |
| 97 | + if (result != null) { | |
| 98 | + map.put(key, result.toString()); | |
| 99 | + } else { | |
| 100 | + map.put(key, ""); | |
| 101 | + } | |
| 102 | + } | |
| 103 | + } | |
| 104 | + return map; | |
| 105 | + } catch (Exception e) { | |
| 106 | + throw new RuntimeException("object转map异常" + e); | |
| 107 | + } | |
| 108 | + } | |
| 109 | + | |
| 110 | + /** | |
| 111 | + * @auther HuJiaqi | |
| 112 | + * @createTime 2016年04月07日 14时24分 | |
| 113 | + * @discription 修饰filed的自定义注解,用于复制bean | |
| 114 | + */ | |
| 115 | + @Target(ElementType.FIELD) | |
| 116 | + @Retention(RetentionPolicy.RUNTIME) | |
| 117 | + @Documented | |
| 118 | + public @interface CopyName { | |
| 119 | + String value() default ""; | |
| 120 | + } | |
| 121 | + | |
| 122 | + /** | |
| 123 | + * @auther HuJiaqi | |
| 124 | + * @createTime 2016年04月07日 16时33分 | |
| 125 | + * @discription 这个方法默认子类不会有与父类相同的field,没有处理这种情况 | |
| 126 | + */ | |
| 127 | + public static void copy(Object from, Object to) { | |
| 128 | + if (from == null || to == null) { | |
| 129 | + return; | |
| 130 | + } | |
| 131 | + Class c = from.getClass(); | |
| 132 | + Field[] fields = c.getDeclaredFields(); | |
| 133 | + c = c.getSuperclass(); | |
| 134 | + while (c != null) { | |
| 135 | + Field[] temp = c.getDeclaredFields(); | |
| 136 | + fields = ArrayUtils.merge(fields, temp); | |
| 137 | + c = c.getSuperclass(); | |
| 138 | + } | |
| 139 | + if (fields != null && fields.length > 0) { | |
| 140 | + for (Field fromField : fields) { | |
| 141 | + fromField.setAccessible(true); | |
| 142 | + String fieldName; | |
| 143 | + if (fromField.isAnnotationPresent(CopyName.class)) { | |
| 144 | + CopyName adjuster = fromField.getAnnotation(CopyName.class); | |
| 145 | + fieldName = !"".equals(adjuster.value()) ? adjuster.value() : fromField.getName(); | |
| 146 | + } else { | |
| 147 | + fieldName = fromField.getName(); | |
| 148 | + } | |
| 149 | + try { | |
| 150 | + Object obj = fromField.get(from); | |
| 151 | + Field toField = null; | |
| 152 | + c = to.getClass(); | |
| 153 | + while (c != null) { | |
| 154 | + try { | |
| 155 | + toField = c.getDeclaredField(fieldName); | |
| 156 | + break; | |
| 157 | + } catch (Exception e) { | |
| 158 | + c = c.getSuperclass(); | |
| 159 | + // 如果异常了,接着找父类 | |
| 160 | + } | |
| 161 | + } | |
| 162 | + if (toField != null) { | |
| 163 | + toField.setAccessible(true); | |
| 164 | + toField.set(to, obj); | |
| 165 | + } | |
| 166 | + } catch (Exception e) { | |
| 167 | + // 什么都不干,异常就当跳过了 | |
| 168 | + } | |
| 169 | + } | |
| 170 | + } | |
| 171 | + } | |
| 172 | + | |
| 173 | +} |