分页查询，Record，map2entity工具类

1.page

package com.WT.bigdata.dsjmh.api.utils;

import com.jfinal.plugin.activerecord.Record;

import java.util.List;

/**
 * 分页查询
 * @author lkx
 * @version 1.0
 * @date 2020/2/27
 */
public class Page {
    private List rows;
    private Long total = -1L;
    private Long totalPage ;
    private Integer pageNum;
    private Integer pageSize;

    public List getRows() {
        return rows;
    }

    public void setRows(List rows) {
        this.rows = rows;
    }

    public Long getTotal() {
        return total;
    }

    public void setTotal(Long total) {
        this.total = total;
    }

    public Long getTotalPage() {
        this.totalPage = (long) Math.ceil((double)total/pageSize);
        return totalPage;
    }

    public void setTotalPage(Long totalPage) {
        this.totalPage = totalPage;
    }

    public Integer getPageNum() {
        return pageNum;
    }

    public void setPageNum(Integer pageNum) {
        this.pageNum = pageNum;
    }

    public Integer getPageSize() {
        return pageSize;
    }

    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }

    public Page() {
    }

    public Page(com.jfinal.plugin.activerecord.Page<Record> pageR) {
        this.rows= RecordUtils.toMap(pageR.getList());
        this.total=(long)pageR.getTotalRow();
        this.pageNum=pageR.getPageNumber();
        this.pageSize=pageR.getPageSize();
    }
}

2.Record

package com.bcht.bigdata.dsjmh.api.utils;

import com.bcht.ms.commons.utils.Page;
import com.jfinal.plugin.activerecord.Record;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Record工具
 * @author lkx
 * @version 1.0
 * @date 2020/2/27
 */
public class RecordUtils {

    public static List<Map> toMap(List<Record> listR){
        List<Map> list = new ArrayList<Map>();
        if(listR!=null){
            for(Record record : listR){
                list.add(toMap(record));
            }
        }
        return list;
    }

    public static Map toMap(Record record){
        if(record!=null){
            return record.getColumns();
        }
        return null;
    }

    public static Page toMap(com.jfinal.plugin.activerecord.Page<Record> pageR) {
        Page page = new Page();
        page.setRows(RecordUtils.toMap(pageR.getList()));
        page.setTotal((long)pageR.getTotalRow());
        page.setPageNum(pageR.getPageNumber());
        page.setPageSize(pageR.getPageSize());
        return page;
    }
}

3.map2entity

package com.bcht.bigdata.dsjmh.api.utils;

/**
 * ClassName: MapToEntity <br/>
 * Description: <br/>
 * date: 2019/7/31<br/>
 *
 * @since JDK 1.8
 */

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Modifier;
import java.util.Date;
import java.util.Map;

/**
 * map转实体
 */
public  class MapToEntity {
             /** map
              * 转实体类
          * @param clazz
          * @param map
          * @param <T>
          * @return*/
    public  static  Object  mapToObject(Class clazz, Map<String,String> map) throws IntrospectionException, IllegalAccessException, InstantiationException {

        BeanInfo beanInfo = Introspector.getBeanInfo(clazz);
        Object obj = clazz.newInstance();
        // 给 JavaBean 对象的属性赋值
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (int i = 0; i < propertyDescriptors.length; i++) {
            PropertyDescriptor descriptor = propertyDescriptors[i];
            String propertyName = descriptor.getName();

            if (map.containsKey(propertyName)) {
                Object value = map.get(propertyName);
                if ("".equals(value)) {
                    value = null;
                }
                Object[] args = new Object[1];
                args[0] = value;
                try {
                    descriptor.getWriteMethod().invoke(obj, args);
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }

            }
        }
        System.out.println(obj.toString());
        return  obj;
    }


    /**
     * Map转成实体对象
     *
     * @param map   map实体对象包含属性
     * @param clazz 实体对象类型
     * @return
     */
    public static <T> T map2Object(Map<String, Object> map, Class<T> clazz) {
        if (map == null) {
            return null;
        }
        T obj = null;
        try {
            obj = clazz.newInstance();

            Field[] fields = obj.getClass().getDeclaredFields();
            for (Field field : fields) {
                int mod = field.getModifiers();
                if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {
                    continue;
                }
                field.setAccessible(true);
                String filedTypeName = field.getType().getName();
                if (filedTypeName.equalsIgnoreCase("java.util.date")) {
                    String datetimestamp = String.valueOf(map.get(field.getName()));
                    if (datetimestamp.equalsIgnoreCase("null")) {
                        field.set(obj, null);
                    } else {
                        field.set(obj, new Date(Long.parseLong(datetimestamp)));
                    }
                } else {
                    field.set(obj, map.get(field.getName()));
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return obj;
    }
}