java的两个bean之间复制属性，所有属性中替换某几个字符

柔光的暖阳◎ 2024-03-16 10:41 82阅读 0赞

以下是实现代码：

import java.beans.PropertyDescriptor;
    import java.lang.reflect.InvocationTargetException;
    import java.util.ArrayList;
    import java.util.List;
    
    import org.springframework.beans.BeanUtils;
    
    public class BeanCopyUtil {
        
    
        /**
         * 复制bean属性
         * 
         * @param source 源bean
         * @param target 目标bean
         * @param replaceChars 需要替换的字符列表
         */
        public static void copyProperties(Object source, Object target, List<String> replaceChars) {
        
            BeanUtils.copyProperties(source, target);
            if (replaceChars != null && !replaceChars.isEmpty()) {
        
                PropertyDescriptor[] sourcePds = BeanUtils.getPropertyDescriptors(source.getClass());
                PropertyDescriptor[] targetPds = BeanUtils.getPropertyDescriptors(target.getClass());
                for (PropertyDescriptor sourcePd : sourcePds) {
        
                    if (sourcePd.getReadMethod() != null) {
        
                        for (PropertyDescriptor targetPd : targetPds) {
        
                            if (targetPd.getWriteMethod() != null && sourcePd.getName().equals(targetPd.getName())) {
        
                                try {
        
                                    Object sourceValue = sourcePd.getReadMethod().invoke(source);
                                    if (sourceValue != null && sourceValue instanceof String) {
        
                                        String targetValue = (String) sourceValue;
                                        for (String replaceChar : replaceChars) {
        
                                            targetValue = targetValue.replace(replaceChar, "");
                                        }
                                        targetPd.getWriteMethod().invoke(target, targetValue);
                                    } else {
        
                                        targetPd.getWriteMethod().invoke(target, sourceValue);
                                    }
                                } catch (IllegalAccessException | IllegalArgumentException
                                        | InvocationTargetException e) {
        
                                    e.printStackTrace();
                                }
                                break;
                            }
                        }
                    }
                }
            }
        }
    
        /**
         * 复制bean属性
         * 
         * @param source 源bean
         * @param targetClass 目标bean的class
         * @param replaceChars 需要替换的字符列表
         * @return 目标bean
         */
        public static <T> T copyProperties(Object source, Class<T> targetClass, List<String> replaceChars) {
        
            T target = null;
            try {
        
                target = targetClass.newInstance();
            } catch (InstantiationException | IllegalAccessException e) {
        
                e.printStackTrace();
            }
            copyProperties(source, target, replaceChars);
            return target;
        }
    
        /**
         * 复制bean属性
         * 
         * @param sourceList 源bean列表
         * @param targetClass 目标bean的class
         * @param replaceChars 需要替换的字符列表
         * @return 目标bean列表
         */
        public static <T> List<T> copyProperties(List<?> sourceList, Class<T> targetClass, List<String> replaceChars) {
        
            List<T> targetList = new ArrayList<>();
            for (Object source : sourceList) {
        
                T target = copyProperties(source, targetClass, replaceChars);
                targetList.add(target);
            }
            return targetList;
        }
    }

使用示例：

public class Test {
        
        public static void main(String[] args) {
        
            // 复制单个bean属性
            User source = new User();
            source.setId(1L);
            source.setName("Tom");
            source.setAge(20);
            User target = new User();
            BeanCopyUtil.copyProperties(source, target, Arrays.asList("o"));
            System.out.println(target.getId()); // 1
            System.out.println(target.getName()); // Tm
            System.out.println(target.getAge()); // 20
    
            // 复制bean列表属性
            List<User> sourceList = new ArrayList<>();
            sourceList.add(source);
            List<UserVO> targetList = BeanCopyUtil.copyProperties(sourceList, UserVO.class, Arrays.asList("o"));
            System.out.println(targetList.get(0).getId()); // 1
            System.out.println(targetList.get(0).getName()); // Tm
            System.out.println(targetList.get(0).getAge()); // 20
        }
    }
    
    class User {
        
        private Long id;
        private String name;
        private Integer age;
        // 省略getter和setter方法
    }
    
    class UserVO {
        
        private Long id;
        private String name;
        private Integer age;
        // 省略getter和setter方法
    }