Object转XML && XML转Object

Object转XML && XML转Object 测试类：

package com.insist.objectxml;import com.insist.objectxml.common.JaxbMapper;import com.insist.objectxml.person.Body;import com.insist.objectxml.person.Person;/** * 描述：测试对象——>XML || XML——>对象<br> * 作者：liqijing <br> * 修改日期：2015-4-6下午07:38:17 <br> * E-mail: [e-mail] <br> */public class ObjectXml {public static void main(String[] args) {String reqXml = getXml();System.out.println("输出XML："+"\n"+reqXml);System.out.println("解析XML-->Object"+"===========================================");Person person = getPerson(reqXml);System.out.println("id="+person.getPerId()+",name="+person.getPerName()+",age="+person.getPerAge()+",sex="+person.getPerSex()+",email="+person.getEmail());}/** * 方法名称: getXml<br> * 描述： Object --> XML * 作者: liqijing * 修改日期：2015-4-6下午07:46:03 * @param body * @param encoding * @return */public static String getXml(){Body body = new Body();body.setPerson(initPerson());String reqXml = JaxbMapper.toXml(body, "GBK") ;if(reqXml == null){return "组装XML出错！" ; }return reqXml ;}/** * 方法名称: getPerson<br> * 描述：XML ---> Object * 作者: liqijing * 修改日期：2015-4-6下午07:47:21 * @param reqXml * @return */public static Person getPerson(String reqXml){Body body = JaxbMapper.fromXml(reqXml, Body.class) ;return body.getPerson() ;}/** * 方法名称: initPerson<br> * 描述：初始化person对象 * 作者: liqijing * 修改日期：2015-4-6下午07:38:12 * @return */public static Person initPerson(){Person person = new Person("100000","马云","24","男","[e-mail]");return person ;}}

JaxbMapper生成&&解析：

/******************************************************************************* * Copyright (c) 2005, 2014 springside.github.io * * Licensed under the Apache License, Version 2.0 (the "License"); *******************************************************************************/package com.insist.objectxml.common;import java.io.StringReader;import java.io.StringWriter;import java.util.Collection;import java.util.concurrent.ConcurrentHashMap;import java.util.concurrent.ConcurrentMap;import javax.xml.bind.JAXBContext;import javax.xml.bind.JAXBElement;import javax.xml.bind.JAXBException;import javax.xml.bind.Marshaller;import javax.xml.bind.Unmarshaller;import javax.xml.bind.annotation.XmlAnyElement;import javax.xml.namespace.QName;import org.apache.commons.lang3.StringUtils;import org.apache.commons.lang3.Validate;import com.insist.objectxml.exception.Exceptions;/** * 使用Jaxb2.0实现XML<->Java Object的Mapper. *  * 在创建时需要设定所有需要序列化的Root对象的Class. * 特别支持Root对象是Collection的情形. *  * @author calvin */public class JaxbMapper {private static final Exceptions Exceptions = null;private static ConcurrentMap<Class, JAXBContext> jaxbContexts = new ConcurrentHashMap<Class, JAXBContext>();/** * Java Object->Xml without encoding. */public static String toXml(Object root) {Class clazz = Reflections.getUserClass(root);return toXml(root, clazz, null);}/** * Java Object->Xml with encoding. */public static String toXml(Object root, String encoding) {Class clazz = Reflections.getUserClass(root);return toXml(root, clazz, encoding);}/** * Java Object->Xml with encoding. */public static String toXml(Object root, Class clazz, String encoding) {try {StringWriter writer = new StringWriter();createMarshaller(clazz, encoding).marshal(root, writer);return writer.toString();} catch (JAXBException e) {throw Exceptions.unchecked(e);}}/** * Java Collection->Xml without encoding, 特别支持Root Element是Collection的情形. */public static String toXml(Collection<?> root, String rootName, Class clazz) {return toXml(root, rootName, clazz, null);}/** * Java Collection->Xml with encoding, 特别支持Root Element是Collection的情形. */public static String toXml(Collection<?> root, String rootName, Class clazz, String encoding) {try {CollectionWrapper wrapper = new CollectionWrapper();wrapper.collection = root;JAXBElement<CollectionWrapper> wrapperElement = new JAXBElement<CollectionWrapper>(new QName(rootName), CollectionWrapper.class, wrapper);StringWriter writer = new StringWriter();createMarshaller(clazz, encoding).marshal(wrapperElement, writer);return writer.toString();} catch (JAXBException e) {throw Exceptions.unchecked(e);}}/** * Xml->Java Object. */public static <T> T fromXml(String xml, Class<T> clazz) {try {StringReader reader = new StringReader(xml);return (T) createUnmarshaller(clazz).unmarshal(reader);} catch (JAXBException e) {throw Exceptions.unchecked(e);}}/** * 创建Marshaller并设定encoding(可为null). * 线程不安全，需要每次创建或pooling。 */public static Marshaller createMarshaller(Class clazz, String encoding) {try {JAXBContext jaxbContext = getJaxbContext(clazz);Marshaller marshaller = jaxbContext.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);if (StringUtils.isNotBlank(encoding)) {marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);}return marshaller;} catch (JAXBException e) {throw Exceptions.unchecked(e);}}/** * 创建UnMarshaller. * 线程不安全，需要每次创建或pooling。 */public static Unmarshaller createUnmarshaller(Class clazz) {try {JAXBContext jaxbContext = getJaxbContext(clazz);return jaxbContext.createUnmarshaller();} catch (JAXBException e) {throw Exceptions.unchecked(e);}}protected static JAXBContext getJaxbContext(Class clazz) {Validate.notNull(clazz, "'clazz' must not be null");JAXBContext jaxbContext = jaxbContexts.get(clazz);if (jaxbContext == null) {try {jaxbContext = JAXBContext.newInstance(clazz, CollectionWrapper.class);jaxbContexts.putIfAbsent(clazz, jaxbContext);} catch (JAXBException ex) {throw new RuntimeException("Could not instantiate JAXBContext for class [" + clazz + "]: " + ex.getMessage(), ex);}}return jaxbContext;}/** * 封装Root Element 是 Collection的情况. */public static class CollectionWrapper {@XmlAnyElementprotected Collection<?> collection;}}

Reflections 类：

/******************************************************************************* * Copyright (c) 2005, 2014 springside.github.io * * Licensed under the Apache License, Version 2.0 (the "License"); *******************************************************************************/package com.insist.objectxml.common;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.lang.reflect.Modifier;import java.lang.reflect.ParameterizedType;import java.lang.reflect.Type;import org.apache.commons.lang3.StringUtils;import org.apache.commons.lang3.Validate;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 反射工具类. *  * 提供调用getter/setter方法, 访问私有变量, 调用私有方法, 获取泛型类型Class, 被AOP过的真实类等工具函数. *  * @author calvin */public class Reflections {private static final String SETTER_PREFIX = "set";private static final String GETTER_PREFIX = "get";private static final String CGLIB_CLASS_SEPARATOR = "$$";private static Logger logger = LoggerFactory.getLogger(Reflections.class);/** * 调用Getter方法. */public static Object invokeGetter(Object obj, String propertyName) {String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(propertyName);return invokeMethod(obj, getterMethodName, new Class[] {}, new Object[] {});}/** * 调用Setter方法, 仅匹配方法名。 */public static void invokeSetter(Object obj, String propertyName, Object value) {String setterMethodName = SETTER_PREFIX + StringUtils.capitalize(propertyName);invokeMethodByName(obj, setterMethodName, new Object[] { value });}/** * 直接读取对象属性值, 无视private/protected修饰符, 不经过getter函数. */public static Object getFieldValue(final Object obj, final String fieldName) {Field field = getAccessibleField(obj, fieldName);if (field == null) {throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");}Object result = null;try {result = field.get(obj);} catch (IllegalAccessException e) {logger.error("不可能抛出的异常{}", e.getMessage());}return result;}/** * 直接设置对象属性值, 无视private/protected修饰符, 不经过setter函数. */public static void setFieldValue(final Object obj, final String fieldName, final Object value) {Field field = getAccessibleField(obj, fieldName);if (field == null) {throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");}try {field.set(obj, value);} catch (IllegalAccessException e) {logger.error("不可能抛出的异常:{}", e.getMessage());}}/** * 直接调用对象方法, 无视private/protected修饰符. * 用于一次性调用的情况，否则应使用getAccessibleMethod()函数获得Method后反复调用. * 同时匹配方法名+参数类型， */public static Object invokeMethod(final Object obj, final String methodName, final Class<?>[] parameterTypes, final Object[] args) {Method method = getAccessibleMethod(obj, methodName, parameterTypes);if (method == null) {throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");}try {return method.invoke(obj, args);} catch (Exception e) {throw convertReflectionExceptionToUnchecked(e);}}/** * 直接调用对象方法, 无视private/protected修饰符， * 用于一次性调用的情况，否则应使用getAccessibleMethodByName()函数获得Method后反复调用. * 只匹配函数名，如果有多个同名函数调用第一个。 */public static Object invokeMethodByName(final Object obj, final String methodName, final Object[] args) {Method method = getAccessibleMethodByName(obj, methodName);if (method == null) {throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");}try {return method.invoke(obj, args);} catch (Exception e) {throw convertReflectionExceptionToUnchecked(e);}}/** * 循环向上转型, 获取对象的DeclaredField, 并强制设置为可访问. *  * 如向上转型到Object仍无法找到, 返回null. */public static Field getAccessibleField(final Object obj, final String fieldName) {Validate.notNull(obj, "object can't be null");Validate.notBlank(fieldName, "fieldName can't be blank");for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()) {try {Field field = superClass.getDeclaredField(fieldName);makeAccessible(field);return field;} catch (NoSuchFieldException e) {// NOSONAR// Field不在当前类定义,继续向上转型}}return null;}/** * 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问. * 如向上转型到Object仍无法找到, 返回null. * 匹配函数名+参数类型。 *  * 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args) */public static Method getAccessibleMethod(final Object obj, final String methodName, final Class<?>... parameterTypes) {Validate.notNull(obj, "object can't be null");Validate.notBlank(methodName, "methodName can't be blank");for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {try {Method method = searchType.getDeclaredMethod(methodName, parameterTypes);makeAccessible(method);return method;} catch (NoSuchMethodException e) {// Method不在当前类定义,继续向上转型}}return null;}/** * 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问. * 如向上转型到Object仍无法找到, 返回null. * 只匹配函数名。 *  * 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args) */public static Method getAccessibleMethodByName(final Object obj, final String methodName) {Validate.notNull(obj, "object can't be null");Validate.notBlank(methodName, "methodName can't be blank");for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {Method[] methods = searchType.getDeclaredMethods();for (Method method : methods) {if (method.getName().equals(methodName)) {makeAccessible(method);return method;}}}return null;}/** * 改变private/protected的方法为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。 */public static void makeAccessible(Method method) {if ((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers())) && !method.isAccessible()) {method.setAccessible(true);}}/** * 改变private/protected的成员变量为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。 */public static void makeAccessible(Field field) {if ((!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers()) || Modifier.isFinal(field.getModifiers())) && !field.isAccessible()) {field.setAccessible(true);}}/** * 通过反射, 获得Class定义中声明的泛型参数的类型, 注意泛型必须定义在父类处 * 如无法找到, 返回Object.class. * eg. * public UserDao extends HibernateDao<User> *  * @param clazz The class to introspect * @return the first generic declaration, or Object.class if cannot be determined */public static <T> Class<T> getClassGenricType(final Class clazz) {return getClassGenricType(clazz, 0);}/** * 通过反射, 获得Class定义中声明的父类的泛型参数的类型. * 如无法找到, 返回Object.class. *  * 如public UserDao extends HibernateDao<User,Long> *  * @param clazz clazz The class to introspect * @param index the Index of the generic ddeclaration,start from 0. * @return the index generic declaration, or Object.class if cannot be determined */public static Class getClassGenricType(final Class clazz, final int index) {Type genType = clazz.getGenericSuperclass();if (!(genType instanceof ParameterizedType)) {logger.warn(clazz.getSimpleName() + "'s superclass not ParameterizedType");return Object.class;}Type[] params = ((ParameterizedType) genType).getActualTypeArguments();if ((index >= params.length) || (index < 0)) {logger.warn("Index: " + index + ", Size of " + clazz.getSimpleName() + "'s Parameterized Type: " + params.length);return Object.class;}if (!(params[index] instanceof Class)) {logger.warn(clazz.getSimpleName() + " not set the actual class on superclass generic parameter");return Object.class;}return (Class) params[index];}public static Class<?> getUserClass(Object instance) {Validate.notNull(instance, "Instance must not be null");Class clazz = instance.getClass();if ((clazz != null) && clazz.getName().contains(CGLIB_CLASS_SEPARATOR)) {Class<?> superClass = clazz.getSuperclass();if ((superClass != null) && !Object.class.equals(superClass)) {return superClass;}}return clazz;}/** * 将反射时的checked exception转换为unchecked exception. */public static RuntimeException convertReflectionExceptionToUnchecked(Exception e) {if ((e instanceof IllegalAccessException) || (e instanceof IllegalArgumentException) || (e instanceof NoSuchMethodException)) {return new IllegalArgumentException(e);} else if (e instanceof InvocationTargetException) {return new RuntimeException(((InvocationTargetException) e).getTargetException());} else if (e instanceof RuntimeException) {return (RuntimeException) e;}return new RuntimeException("Unexpected Checked Exception.", e);}}

Person类

package com.insist.objectxml.person;import javax.xml.bind.annotation.XmlElement;import javax.xml.bind.annotation.XmlType; /** * 描述：object转xml实体类<br> * 作者：liqijing <br> * 修改日期：2015-4-6下午07:29:49 <br> * E-mail: [e-mail] <br> */@XmlType(name="Person",propOrder={"perId","perName","perAge","perSex","email"}) public class Person {private String perId;private String perName ;private String perAge ;private String perSex ;private String email ;@XmlElement(name = "PerId")public String getPerId() {return perId;}public void setPerId(String perId) {this.perId = perId;}@XmlElement(name = "PerName")public String getPerName() {return perName;}public void setPerName(String perName) {this.perName = perName;}@XmlElement(name = "PerAge")public String getPerAge() {return perAge;}public void setPerAge(String perAge) {this.perAge = perAge;}@XmlElement(name = "PerSex")public String getPerSex() {return perSex;}public void setPerSex(String perSex) {this.perSex = perSex;}@XmlElement(name = "PerEmail")public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public Person() {// TODO Auto-generated constructor stub}public Person(String perId, String perName, String perAge, String perSex,String email) {this.perId = perId;this.perName = perName;this.perAge = perAge;this.perSex = perSex;this.email = email ;}}

Body类：

package com.insist.objectxml.person;import javax.xml.bind.annotation.XmlElement;import javax.xml.bind.annotation.XmlRootElement;/** * 描述：body标头<br> * 作者：liqijing <br> * 修改日期：2015-4-6下午07:34:49 <br> * E-mail: [e-mail] <br> */@XmlRootElement(name = "Body")public class Body {private Person person ;@XmlElement(name = "Person")public Person getPerson() {return person;}public void setPerson(Person person) {this.person = person;}}

需要jar包：

commons-lang3-3.1.jar

slf4j-api-1.7.5-sources.jar

slf4j-api-1.7.5.jar

很高兴与你们分享：

   希望对需要实现对象转XML或XML转对象的朋友们有帮助！

   谢谢！