将Java bean转换为Map
将Java bean转换为Map
实例源码：
源代码：
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//package com.nowjava;4
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import java.beans.BeanInfo;6
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import java.beans.IntrospectionException;8
/** 9
来自 时代Java公众号**/10
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import java.beans.Introspector;12
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import java.beans.PropertyDescriptor;14
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import java.lang.reflect.InvocationTargetException;16
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import java.lang.reflect.Method;18
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import java.util.HashMap;20
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import java.util.Map;22
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public class Main {/* from n o w j a v a . c o m*/25
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public static void main(String[] argv) throws Exception {27
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Object bean = "nowjava.com";29
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System.out.println(bean2Map(bean));31
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}33
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@SuppressWarnings({ "rawtypes", "unchecked" })36
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public static Map bean2Map(Object bean) throws IntrospectionException,38
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IllegalAccessException, InvocationTargetException {40
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Class type = bean.getClass();42
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Map returnMap = new HashMap();44
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BeanInfo beanInfo = Introspector.getBeanInfo(type);46
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PropertyDescriptor[] propertyDescriptors = beanInfo48
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.getPropertyDescriptors();50
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for (int i = 0; i < propertyDescriptors.length; i++) {52
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PropertyDescriptor descriptor = propertyDescriptors[i];54
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String propertyName = descriptor.getName();56
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if (!propertyName.equals("class")) {58
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Method readMethod = descriptor.getReadMethod();60
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Object result = readMethod.invoke(bean, new Object[0]);62
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// System.out.println(descriptor.getName()+"---"+descriptor.getPropertyType().getSimpleName());64
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if (result != null) {66
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returnMap.put(propertyName, result);68
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} else {70
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switch (descriptor.getPropertyType().getSimpleName()) {72
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case "String":74
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returnMap.put(propertyName, "");76
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break;78
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case "Integer":80
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returnMap.put(propertyName, 0);82
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break;84
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case "Long":86
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returnMap.put(propertyName, 0l);88
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break;90
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case "BigDecimal":92
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returnMap.put(propertyName, 0);94
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break;96
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case "int":98
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returnMap.put(propertyName, 0);100
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break;102
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case "float":104
/**代码未完, 请加载全部代码(NowJava.com).**/执行结果：
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