对象和map转换
package com.kedacom.common.util;import java.beans.BeanInfo;import java.beans.IntrospectionException;import java.beans.Introspector;import java.beans.PropertyDescriptor;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.HashMap;import java.util.Map;public class BeanToMapUtil {/** * 将一个 Map 对象转化为一个 JavaBean * * @param type * 要转化的类型 * @param map * 包含属性值的 map * @return 转化出来的 JavaBean 对象 * @throws IntrospectionException * 如果分析类属性失败 * @throws IllegalAccessException * 如果实例化 JavaBean 失败 * @throws InstantiationException * 如果实例化 JavaBean 失败 * @throws InvocationTargetException * 如果调用属性的 setter 方法失败 */@SuppressWarnings("unchecked")public static Object convertMap(Class type, Map map) throws IntrospectionException, IllegalAccessException,InstantiationException, InvocationTargetException {BeanInfo beanInfo = Introspector.getBeanInfo(type); // 获取类属性Object obj = type.newInstance(); // 创建 JavaBean 对象// 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)) {// 下面一句可以 try 起来,这样当一个属性赋值失败的时候就不会影响其他属性赋值.Object value = map.get(propertyName);Object[] args = new Object[1];args[0] = value;descriptor.getWriteMethod().invoke(obj, args);}}return obj;}/** * 将一个 JavaBean 对象转化为一个 Map * * @param bean * 要转化的JavaBean 对象 * @return 转化出来的 Map 对象 * @throws IntrospectionException * 如果分析类属性失败 * @throws IllegalAccessException * 如果实例化 JavaBean 失败 * @throws InvocationTargetException * 如果调用属性的 setter 方法失败 */@SuppressWarnings("unchecked")public static Map convertBean(Object bean) throws IntrospectionException, IllegalAccessException,InvocationTargetException {Class type = bean.getClass();Map returnMap = new HashMap();BeanInfo beanInfo = Introspector.getBeanInfo(type);PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();for (int i = 0; i < propertyDescriptors.length; i++) {PropertyDescriptor descriptor = propertyDescriptors[i];String propertyName = descriptor.getName();if (!propertyName.equals("class")) {Method readMethod = descriptor.getReadMethod();Object result = readMethod.invoke(bean, new Object[0]);if (result != null) {returnMap.put(propertyName, result);} else {returnMap.put(propertyName, "");}}}return returnMap;}public static void main(String[] args) {}}