java 对象转换成另外一个类对象泛型

川长思鸟来 2022-08-06 15:04 269阅读 0赞

对象转换成另一个类对象

package com.mw.usims.fts.util;
    
    import com.mw.usims.fts.model.BaseModel;
    import org.apache.poi.ss.formula.functions.T;
    
    import java.lang.reflect.Field;
    import java.lang.reflect.InvocationTargetException;
    import java.lang.reflect.Method;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * Created by LiAnAn on 2015/2/3.
     */
    public class Test1 {
        public static  <T> T convertClass(Object obj,Class<T> cla) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException {
            Map<String,Object> maps = new HashMap<String,Object>();
            T  dataBean = null;
            if(null==obj) {
                return null;
            }
            Class<?> cls = obj.getClass();
            dataBean = cla.newInstance();
            Field[] fields = cls.getDeclaredFields();
            Field[] beanFields = cla.getDeclaredFields();
            for(Field field:fields){
                String fieldName = field.getName();
                String strGet = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1, fieldName.length());
                Method methodGet = cls.getDeclaredMethod(strGet);
                Object object = methodGet.invoke(obj);
                maps.put(fieldName,object==null?"":object);
            }
    
            for(Field field:beanFields){
                field.setAccessible(true);
                String fieldName = field.getName();
                Class<?> fieldType = field.getType();
                String fieldValue = maps.get(fieldName)==null?null:maps.get(fieldName).toString();
                if(fieldValue!=null){
                    try {
                        if(String.class.equals(fieldType)){
                            field.set(dataBean, fieldValue);
                        }else if(byte.class.equals(fieldType)){
                            field.setByte(dataBean, Byte.parseByte(fieldValue));
    
                        }else if(Byte.class.equals(fieldType)){
                            field.set(dataBean, Byte.valueOf(fieldValue));
    
                        }else if(boolean.class.equals(fieldType)){
                            field.setBoolean(dataBean, Boolean.parseBoolean(fieldValue));
    
                        }else if(Boolean.class.equals(fieldType)){
                            field.set(dataBean, Boolean.valueOf(fieldValue));
    
                        }else if(short.class.equals(fieldType)){
                            field.setShort(dataBean, Short.parseShort(fieldValue));
    
                        }else if(Short.class.equals(fieldType)){
                            field.set(dataBean, Short.valueOf(fieldValue));
    
                        }else if(int.class.equals(fieldType)){
                            field.setInt(dataBean, Integer.parseInt(fieldValue));
    
                        }else if(Integer.class.equals(fieldType)){
                            field.set(dataBean, Integer.valueOf(fieldValue));
    
                        }else if(long.class.equals(fieldType)){
                            field.setLong(dataBean, Long.parseLong(fieldValue));
    
                        }else if(Long.class.equals(fieldType)){
                            field.set(dataBean, Long.valueOf(fieldValue));
    
                        }else if(float.class.equals(fieldType)){
                            field.setFloat(dataBean, Float.parseFloat(fieldValue));
    
                        }else if(Float.class.equals(fieldType)){
                            field.set(dataBean, Float.valueOf(fieldValue));
    
                        }else if(double.class.equals(fieldType)){
                            field.setDouble(dataBean, Double.parseDouble(fieldValue));
    
                        }else if(Double.class.equals(fieldType)){
                            field.set(dataBean, Double.valueOf(fieldValue));
    
                        }else if(Date.class.equals(fieldType)){
                            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
                            field.set(dataBean, sdf.parse(fieldValue));
                        }
                    } catch (IllegalArgumentException e) {
                        e.printStackTrace();
                    } catch (ParseException e) {
                        e.printStackTrace();
                    }
    
                }
            }
            return dataBean;
    
        }
    
        public static void main(String arg0[]) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
            BaseModel baseModel = new BaseModel();
            baseModel.setId("1");
            baseModel.setDescription("2");
            baseModel.setSequence(3);
            baseModel.setType("4");
            baseModel.setValue("5");
            BaseModel base = convertClass(baseModel, BaseModel.class);
            System.out.println(base.getId());
        }
    }