[feat] ObjUtil 增加对象的深度copy

src/main/java/com/yexuejc/base/util/ObjUtil.java

@@ -4,9 +4,11 @@ import com.yexuejc.base.annotation.ToUeProperty;
 
 import java.io.*;
 import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.*;
+import java.util.stream.Collectors;
 
 /**
  * 对象工具：对类的操作
@@ -260,4 +262,145 @@ public class ObjUtil {
         return outer;
     }
 
+    /**
+     * 复制对象属性值，包含父类 (不需要getter和setter)
+     * <p>includeField和excludeField同时传入，走包含逻辑，</p>
+     *
+     * @param source       源对象
+     * @param targetClass  目标对象class
+     * @param includeField 包含对象
+     * @param excludeField 排除对象
+     * @param <I>
+     * @param <O>
+     * @return 目标对象
+     * @throws Exception
+     */
+    public static <I, O> O copy(I source, Class<O> targetClass, List<String> includeField, List<String> excludeField) throws Exception {
+        List<Field> allFields = getAllFields(source.getClass());
+        O o = targetClass.getDeclaredConstructor().newInstance();
+        if (StrUtil.isNotEmpty(excludeField) && StrUtil.isEmpty(includeField)) {
+            allFields = allFields.stream().filter(f -> !excludeField.contains(f.getName())).collect(Collectors.toList());
+        }
+        if (StrUtil.isNotEmpty(includeField)) {
+            allFields = allFields.stream().filter(f -> includeField.contains(f.getName())).collect(Collectors.toList());
+        }
+        allFields.forEach(f -> {
+            try {
+                try {
+                    Field field = targetClass.getDeclaredField(f.getName());
+                    if (field != null) {
+                        f.setAccessible(true);
+                        Object v = f.get(source);
+                        f.setAccessible(false);
+                        field.setAccessible(true);
+                        field.set(o, v);
+                        field.setAccessible(false);
+                    }
+                } catch (NoSuchFieldException e) {
+                }
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        });
+        return o;
+    }
+
+    /**
+     * 深度复制对象
+     * <p>获取source的所有getXxx。xxx作为属性，且包含父类的getXxx</p>
+     * <p>查找target的xxx属性，进行反射设值</p>
+     *
+     * @param source       源对象
+     * @param targetClass  目标对象class
+     * @param invokeSetter 设置target属性值时，是否使用setter方法设置
+     * @param <I>
+     * @param <O>
+     * @return 目标对象
+     */
+    public static <I, O> O copy(I source, Class<O> targetClass, boolean invokeSetter) throws Exception {
+        List<Method> getterMethods = getAllGetterMethods(source.getClass(), "get");
+        O o = targetClass.getDeclaredConstructor().newInstance();
+        getterMethods.forEach(method -> {
+            try {
+                String fieldName = method.getName().replace("get", "");
+                Object v = method.invoke(source);
+                if (invokeSetter) {
+                    try {
+                        Method setterMethod = targetClass.getDeclaredMethod("set" + fieldName, method.getReturnType());
+                        if (null != setterMethod) {
+                            setterMethod.invoke(o, v);
+                        }
+                    } catch (NoSuchMethodException e) {
+                    }
+                } else {
+                    try {
+                        Field field = targetClass.getDeclaredField(lowerCaseFirstChar(fieldName));
+                        if (field != null) {
+                            field.setAccessible(true);
+                            field.set(o, v);
+                            field.setAccessible(false);
+                        }
+                    } catch (NoSuchFieldException e) {
+                    }
+                }
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        });
+        return o;
+    }
+
+    /**
+     * 获取所有方法，包含父类
+     *
+     * @param beanClass
+     * @param startsWith 方法的开头匹配（空，返回所有）
+     * @return
+     */
+    public static List<Method> getAllGetterMethods(Class<?> beanClass, String startsWith) {
+        List<Method> methodList = new ArrayList<>();
+        Method[] methods = beanClass.getDeclaredMethods();
+        if (StrUtil.isNotEmpty(startsWith)) {
+            methodList.addAll(Arrays.stream(methods)
+                    .filter(method -> method.getName().startsWith(startsWith))
+                    .collect(Collectors.toList()));
+        } else {
+            methodList.addAll(Arrays.asList(methods));
+        }
+        Class<?> superclass = beanClass.getSuperclass();
+        if (superclass != null) {
+            methodList.addAll(getAllGetterMethods(superclass, startsWith));
+        }
+        return methodList;
+    }
+
+    /**
+     * 获取所有属性，包含父类
+     *
+     * @param beanClass
+     * @return
+     */
+    public static List<Field> getAllFields(Class<?> beanClass) {
+        List<Field> fieldList = new ArrayList<>();
+        while (beanClass != null) {
+            fieldList.addAll(Arrays.asList(beanClass.getDeclaredFields()));
+            beanClass = beanClass.getSuperclass();
+        }
+        return fieldList;
+    }
+
+    /**
+     * 首字母小写
+     *
+     * @param str
+     * @return
+     */
+    public static String lowerCaseFirstChar(String str) {
+        if (str == null || str.length() == 0) {
+            return str;
+        } else {
+            return str.substring(0, 1).toLowerCase() + str.substring(1);
+        }
+    }
+
 }