JAVA Object转数组工具类、 复杂JavaBean转换工具类、每三个逗号分隔字符串

1.  Object转数组工具类 

public static List<Object> objToList(Object obj) {
        // 不判断Object类型 直接转换成数组
        List<Object> list = new ArrayList<Object>();
        for (Object o : (List<?>) obj) {
            list.add(o);
        }
        return list;
    }

1.  复杂JavaBean转换工具类

2.   首先导入依赖
     // dozer的工具包
     <dependency>
         <groupId>net.sf.dozer</groupId>
         <artifactId>dozer</artifactId>
         <version>5.4.0</version>
     </dependency>
   
   //  添加配置类
   @Configuration
   public class DozerBeanMapperConfigure {
       @Bean
       public DozerBeanMapper mapper() {
           DozerBeanMapper mapper = new DozerBeanMapper();
           return mapper;
       }
   }
   //自定义工具类
   public class DozerUtils {
       static DozerBeanMapper dozerBeanMapper = new DozerBeanMapper();
   
       public static <T> List<T> mapList(Collection sourceList, Class<T> destinationClass){
           List destinationList = Lists.newArrayList();
           for (Iterator i$ = sourceList.iterator(); i$.hasNext();){
               Object sourceObject = i$.next();
               Object destinationObject = dozerBeanMapper.map(sourceObject, destinationClass);
               destinationList.add(destinationObject);
           }
           return destinationList;
       }
   }
   
   如果是List对象  使用   DozerUtils.mapList(userList,user.class);
   userList 是你要转换的List   user是你要转换后的对象类型
   
   如果不是List对象  使用
   // bean转换工具
       @Autowired
       private Mapper dozerMapper;
   
   然后调用 dozerMapper.map(user,userdto.class);方法

3. 每三个逗号分隔字符串

public static List<List<String>> wayPointsUtils(String wayPointSet1) {
        // 这里是我前端传的JSON字符串有\ 所以做了处理
        wayPointSet1 = wayPointSet1.replaceAll("\"", "");
        // 去掉左右花括号
        String wayPointSet = wayPointSet1.substring(1, wayPointSet1.length() - 1);
        // 此处才是开始分隔字符串的操作 wayPointSet是要处理的字符串
        String[] array = wayPointSet.split(",");
        List<String> start = new ArrayList<>();
        for (int i = 0; i < array.length; i++) {
            start.add(array[i]);
        }

        List<List<String>> result = new ArrayList();

        int size = start.size();
        if (size > 0) {
            int segments = size / 3;
            segments = size % 3 == 0 ? segments : segments + 1; // 段数
            List<String> cutList = null;
            for (int i = 0; i < segments; i++) {
                if (i == segments - 1) {
                    cutList = start.subList(3 * i, size);
                } else {
                    cutList = start.subList(3 * i, 3 * (i + 1));
                }
                result.add(cutList);
            }
        }
        return result;
    }