通过Java反射机制，动态给对象属性赋值，并获取属性值，java属性值,import java.

通过Java反射机制，动态给对象属性赋值，并获取属性值，java属性值,import java.

import java.lang.reflect.Field;import java.lang.reflect.Method;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Locale;import java.util.Map;import java.util.Map.Entry;/* * 通过Java反射机制，动态给对象属性赋值，并获取属性值 */public class ClassRefUtil {    /**     * @param args     */    public static void main(String[] args) {        Map<String, String> valMap = new HashMap<String, String>();          valMap.put("userName", "michael");          valMap.put("age", "27");          valMap.put("height", "173.5");          valMap.put("date", "2010-10-24");          valMap.put("times", "1287932898276");          valMap.put("flag", "false");          ChildInfo rl = new ChildInfo();         System.out.println("通过反射赋值.");          PublicUtil.setFieldValue(rl, valMap);          System.out.println("通过反射取值:");          int i = 0;        Map<String, String> fieldValMap = PublicUtil.getFieldValueMap(rl);         for (Entry<String, String> entry : fieldValMap.entrySet()) {              i++;            System.out.println("[字段 "+i+"] ["+entry.getKey()+"]   ---   [" + entry.getValue()+"]");          }      }    /**      * 取Bean的属性和值对应关系的MAP      * @param bean      * @return Map      */     public static Map<String, String> getFieldValueMap(Object bean) {          Class<?> cls = bean.getClass();          Map<String, String> valueMap = new HashMap<String, String>();          // 取出bean里的所有方法          Method[] methods = cls.getDeclaredMethods();          Field[] fields = cls.getDeclaredFields();          for (Field field : fields) {              try {                  String fieldType = field.getType().getSimpleName();                  String fieldGetName = parGetName(field.getName());                  if (!checkGetMet(methods, fieldGetName)) {                      continue;                  }                  Method fieldGetMet = cls.getMethod(fieldGetName, new Class[] {});                  Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});                  String result = null;                  if ("Date".equals(fieldType)) {                      result = fmtDate((Date) fieldVal);                  } else {                      if (null != fieldVal) {                          result = String.valueOf(fieldVal);                      }                  }                  valueMap.put(field.getName(), result);              } catch (Exception e) {                  continue;              }          }          return valueMap;      }      /**      * set属性的值到Bean      * @param bean      * @param valMap      */     public static void setFieldValue(Object bean, Map<String, String> valMap) {          Class<?> cls = bean.getClass();          // 取出bean里的所有方法          Method[] methods = cls.getDeclaredMethods();          Field[] fields = cls.getDeclaredFields();          for (Field field : fields) {              try {                  String fieldSetName = parSetName(field.getName());                  if (!checkSetMet(methods, fieldSetName)) {                      continue;                  }                  Method fieldSetMet = cls.getMethod(fieldSetName, field.getType());                  String value = valMap.get(field.getName());                  if (null != value &amp;&amp; !"".equals(value)) {                      String fieldType = field.getType().getSimpleName();                      if ("String".equals(fieldType)) {                          fieldSetMet.invoke(bean, value);                      } else if ("Date".equals(fieldType)) {                          Date temp = parseDate(value);                          fieldSetMet.invoke(bean, temp);                      } else if ("Integer".equals(fieldType) || "int".equals(fieldType)) {                          Integer intval = Integer.parseInt(value);                          fieldSetMet.invoke(bean, intval);                      } else if ("Long".equalsIgnoreCase(fieldType)) {                          Long temp = Long.parseLong(value);                          fieldSetMet.invoke(bean, temp);                      } else if ("Double".equalsIgnoreCase(fieldType)) {                          Double temp = Double.parseDouble(value);                          fieldSetMet.invoke(bean, temp);                      } else if ("Boolean".equalsIgnoreCase(fieldType)) {                          Boolean temp = Boolean.parseBoolean(value);                          fieldSetMet.invoke(bean, temp);                      } else {                          System.out.println("not supper type" + fieldType);                      }                  }              } catch (Exception e) {                  continue;              }          }      }      /**      * 格式化string为Date      * @param datestr      * @return date      */     private static Date parseDate(String datestr) {          if (null == datestr || "".equals(datestr)) {              return null;          }          try {              String fmtstr = null;              if (datestr.indexOf(':') > 0) {                  fmtstr = "yyyy-MM-dd HH:mm:ss";              } else {                  fmtstr = "yyyy-MM-dd";              }              SimpleDateFormat sdf = new SimpleDateFormat(fmtstr, Locale.UK);              return sdf.parse(datestr);          } catch (Exception e) {              return null;          }      }      /**      * 日期转化为String      * @param date      * @return date string      */     private static String fmtDate(Date date) {          if (null == date) {              return null;          }          try {              SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);              return sdf.format(date);          } catch (Exception e) {              return null;          }      }      /**      * 判断是否存在某属性的 set方法      * @param methods      * @param fieldSetMet      * @return boolean      */     private static boolean checkSetMet(Method[] methods, String fieldSetMet) {          for (Method met : methods) {              if (fieldSetMet.equals(met.getName())) {                  return true;              }          }          return false;      }      /**      * 判断是否存在某属性的 get方法      * @param methods      * @param fieldGetMet      * @return boolean      */     private static boolean checkGetMet(Method[] methods, String fieldGetMet) {          for (Method met : methods) {              if (fieldGetMet.equals(met.getName())) {                  return true;              }          }          return false;      }      /**      * 拼接某属性的 get方法      * @param fieldName      * @return String      */     private static String parGetName(String fieldName) {          if (null == fieldName || "".equals(fieldName)) {              return null;          }          return "get" + fieldName.substring(0, 1).toUpperCase()                  + fieldName.substring(1);      }      /**      * 拼接在某属性的 set方法      * @param fieldName      * @return String      */     private static String parSetName(String fieldName) {          if (null == fieldName || "".equals(fieldName)) {              return null;          }          return "set" + fieldName.substring(0, 1).toUpperCase()                  + fieldName.substring(1);      } }