java 通过反射完成list到beanlist再把ben转换成map的过程

import java.beans.PropertyDescriptor;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class Bean2MapUtil {private Bean2MapUtil(){}/** * 把list转为beans * @param result * @return */private static List<Object> toBeanList(List<List<String>> result,@SuppressWarnings("rawtypes") Class classType){List<Object> resulsBeans = new ArrayList<Object>();Object obj;try {Field[] fields = classType.getDeclaredFields();int i = 0;if(result.size()>=3){for(List<String> item:result){i++;if(i<=2)continue;obj = classType.newInstance();for (int j = 0; j < fields.length; j++) {//减三表示页面有三个隐藏域PropertyDescriptor pd = new PropertyDescriptor(fields[j].getName(), classType);Method wM = pd.getWriteMethod();//获得写方法wM.invoke(obj, item.get(j));//}resulsBeans.add(obj);}}} catch (Exception e) {e.printStackTrace();}return resulsBeans;}/** * 把beanlist转化为MapList * @return */@SuppressWarnings("rawtypes")public static List<Map> beans2Maps(String filePath,Class classType){List<Map> ret = new ArrayList<Map>();ReadExcel03 e03 = new ReadExcel03();//读取excelReadExcel07 e07 = new ReadExcel07();ReadExcelAdapter adapter = new ReadExcelAdapter(filePath, e03, e07);List<List<String>> result = adapter.readExcel();List<Object> resulsBeans = toBeanList(result,classType);try {for(int i= 0;i < resulsBeans.size();i++){Field[] fields = classType.getDeclaredFields();Map<String, Object> tempMap = new HashMap<String,Object>();for (int j = 0; j < fields.length; j++) {//减三表示页面有三个隐藏域PropertyDescriptor pd = new PropertyDescriptor(fields[j].getName(), classType);Method wM = pd.getReadMethod();//获得写方法tempMap.put(fields[j].getName(), wM.invoke(resulsBeans.get(i)));}ret.add(tempMap);}} catch (Exception e) {e.printStackTrace();}return ret;}}

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