您好,登錄后才能下訂單哦!
今天就跟大家聊聊有關(guān)Java中怎么利用反射方法將Bean和Map進(jìn)行轉(zhuǎn)換,可能很多人都不太了解,為了讓大家更加了解,小編給大家總結(jié)了以下內(nèi)容,希望大家根據(jù)這篇文章可以有所收獲。
由于JavaBean(實(shí)體類)結(jié)構(gòu)與Map類似,我們可以把JavaBean與Map進(jìn)行轉(zhuǎn)換
package com.yy; import java.beans.BeanInfo; import java.beans.IntrospectionException; import java.beans.Introspector; import java.beans.PropertyDescriptor; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.HashMap; import java.util.Map; /** * @java項(xiàng)目www.fhadmin.org * @description: 采用單例模式實(shí)現(xiàn) * @date 2021 */ public class JavaBeanChangeMap { private static final JavaBeanChangeMap javaBeanChangeMap = new JavaBeanChangeMap(); private JavaBeanChangeMap() { } public static JavaBeanChangeMap getInstance() { return javaBeanChangeMap; } /** * JavaBean 轉(zhuǎn) Map */ public <T> Map<String, Object> JavaBeanToMap(Class<T> t) throws IntrospectionException, InvocationTargetException, IllegalAccessException, InstantiationException, NoSuchMethodException { // 1、創(chuàng)建 Map 集合 Map<String, Object> map = new HashMap<>(); // 2、通過內(nèi)省機(jī)制獲取 PropertyDescriptors 屬性數(shù)組 // Object.class PropertyDescriptor[] propertyDescriptors = Introspector.getBeanInfo(Person.class, Object.class) .getPropertyDescriptors(); Constructor<T> constructor = t.getConstructor(String.class, int.class); Object obj = constructor.newInstance("afa", 12); System.out.println("obj = ">
Junit測(cè)試代碼:
package com.yy.test; import com.yy.JavaBeanChangeMap; import com.yy.Person; import org.junit.Test; import java.beans.IntrospectionException; import java.lang.reflect.InvocationTargetException; import java.util.HashMap; import java.util.Map; public class JavaBeanChangeMapTest { @Test public void testJavaBeanToMap() throws Exception { Map<String, Object> map = JavaBeanChangeMap.getInstance().JavaBeanToMap(Person.class); System.out.println("map = " + map); System.out.println("================================"); } @Test public void testMapToJavaBean() throws Exception { Map map = new HashMap(); map.put("name", "afa"); map.put("age", 12); Person person = JavaBeanChangeMap.getInstance().mapToJavaBean(map, Person.class); System.out.println("person = " + person); } }
運(yùn)行結(jié)果:
"C:\Program Files\Java\jdk-11.0.9\bin\java.exe" obj = Person{name='afa', age=12} map = {name=afa, age=12} ================================ person = Person{name='afa', age=12} Process finished with exit code 0
看完上述內(nèi)容,你們對(duì)Java中怎么利用反射方法將Bean和Map進(jìn)行轉(zhuǎn)換有進(jìn)一步的了解嗎?如果還想了解更多知識(shí)或者相關(guān)內(nèi)容,請(qǐng)關(guān)注億速云行業(yè)資訊頻道,感謝大家的支持。
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。