java使用commons-betwixt 实现bean与xml互转
项目下载地址：http://download.csdn.net/detail/afgasdg/4825666
项目所需的jar包：
一、XML2BeanUtils.java工具类如下：
package com.viathink.core.utils;
import java.beans.IntrospectionException;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import org.apache.commons.betwixt.BindingConfiguration;
import org.apache.commons.betwixt.IntrospectionConfiguration;
import org.apache.commons.betwixt.expression.Context;
import org.apache.commons.betwixt.io.BeanReader;
import org.apache.commons.betwixt.io.BeanWriter;
import org.apache.commons.betwixt.strategy.DecapitalizeNameMapper;
import org.apache.commons.betwixt.strategy.DefaultObjectStringConverter;
import org.apache.commons.betwixt.strategy.HyphenatedNameMapper;
import org.xml.sax.SAXException;
/**
* Xml文件与javaBean对象互转工具类
* @author LiuJunGuang
* @date 2012-11-21下午1:38:56
*/
public class XML2BeanUtils {
private static final String xmlHead = "<?xml version='1.0' ?>";
/**
* 将javaBean对象转换成xml文件，对于没有设置的属性将不会生成xml标签
* @author LiuJunGuang
* @param obj 待转换的javabean对象
* @return String 转换后的xml 字符串
* @throws IntrospectionException
* @throws SAXException
* @throws IOException
* @date 2012-11-21下午1:38:53
*/
public static String bean2XmlString(Object obj) throws IOException, SAXException, IntrospectionException {
if (obj == null)
throw new IllegalArgumentException("给定的参数不能为null！");
StringWriter sw = new StringWriter();
sw.write(xmlHead);// 写xml文件头
BeanWriter writer = new BeanWriter(sw);
IntrospectionConfiguration config = writer.getXMLIntrospector().getConfiguration();
BindingConfiguration bc = writer.getBindingConfiguration();
bc.setObjectStringConverter(new DateConverter());
bc.setMapIDs(false);
config.setAttributesForPrimitives(false);
config.setAttributeNameMapper(new HyphenatedNameMapper());
config.setElementNameMapper(new DecapitalizeNameMapper());
writer.enablePrettyPrint();
writer.write(obj.getClass().getSimpleName(), obj);
writer.close();
return sw.toString();
}
/**
* 将xml文件转换成相应的javabean对象,对于List，Map，Array转换时需要在需要保证Bean类中有单个添加方法</br>
* <p><blockquote><pre>
* 例如：List<{@link String}> userNameList --> addUserNameList(String username)
* String[] items --> addItems(String item)
* Map<String,User> userMap --> addUserMap(String key,User user)
* </pre></blockquote></p>
* 注意：<br>
* 目前还没有找到好的方法解决Map与Map嵌套，List与List等嵌套的问题，使用时应当避免以上几种情况。
* @author LiuJunGuang
* @param beanClass 待转换的javabean字节码
* @param xmlFile xml文件字符串
* @return 转换后的对象
* @throws IntrospectionException
* @throws SAXException
* @throws IOException
* @date 2012-11-21下午1:40:14
*/
@SuppressWarnings("unchecked")
public static <T> T xmlSring2Bean(Class<T> beanClass, String xmlFile) throws IntrospectionException, IOException,
SAXException {
if (beanClass == null || xmlFile == null || xmlFile.isEmpty())
throw new IllegalArgumentException("给定的参数不能为null！");
StringReader xmlReader = new StringReader(xmlFile);
BeanReader reader = new BeanReader();
reader.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
BindingConfiguration bc = reader.getBindingConfiguration();
bc.setObjectStringConverter(new DateConverter());
bc.setMapIDs(false);
T obj = null;
reader.registerBeanClass(beanClass.getSimpleName(), beanClass);
obj = (T) reader.parse(xmlReader);
xmlReader.close();
return obj;
}
/**
* 日期转换，主要是解决日期为null或者空字符串解析报错问题
* @author LiuJunGuang
* @date 2013年12月31日下午6:56:49
*/
private static class DateConverter extends DefaultObjectStringConverter {
private static final long serialVersionUID = -197858851188189916L;
@Override
@SuppressWarnings("rawtypes")
public String objectToString(Object object, Class type, String flavour, Context context) {
return super.objectToString(object, type, flavour, context);
}
@Override
@SuppressWarnings("rawtypes")
public Object stringToObject(String string, Class type, String flavour, Context context) {
if (string == null || "".equals(string))
return null;
return super.stringToObject(string, type, flavour, context);
}
}
}
package com.aimilin;
public class PersonBean {
private String name;
private int age;
public PersonBean() {
}
public PersonBean(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "PersonBean[name='" + name + "',age='" + age + "']";
}
}
package com.aimilin;
import java.io.Serializable;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
public class User implements Serializable {
private static final long serialVersionUID = 1354973253595584043L;
private String userName;
private int age;
private PersonBean person;
private List<String> hobbyList;
private Map<String, PersonBean> personMap;
private String[] hobbyArray;
/**
* 添加map类型属性的方法
* @param key
* @param person
* @date 2012-11-29下午1:01:06
*/
public void addPersonMap(String key, PersonBean person) {
if (personMap == null) {
personMap = new HashMap<String, PersonBean>();
}
personMap.put(key, person);
}
/**
* 添加list类型的方法
* @param hobby
* @date 2012-11-29下午1:01:07
*/
public void addHobbyList(String hobby) {
if (hobbyList == null) {
hobbyList = new LinkedList<String>();
}
hobbyList.add(hobby);
}
/**
* 添加数组类型的方法
* @param hobby
* @date 2012-11-29下午1:01:09
*/
public void addHobbyArray(String hobby) {
hobbyArray = StringUtils.addStringToArray(hobbyArray, hobby);
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public User() {
super();
}
public PersonBean getPerson() {
return person;
}
public void setPerson(PersonBean person) {
this.person = person;
}
public List<String> getHobbyList() {
return hobbyList;
}
public void setHobbyList(List<String> hobbyList) {
this.hobbyList = hobbyList;
}
public Map<String, PersonBean> getPersonMap() {
return personMap;
}
public void setPersonMap(Map<String, PersonBean> personMap) {
this.personMap = personMap;
}
public String[] getHobbyArray() {
return hobbyArray;
}
public void setHobbyArray(String[] hobbyArray) {
this.hobbyArray = hobbyArray;
}
@Override
public String toString() {
return "User [userName=" + userName + ", age=" + age + ", person=" + person + ", hobbyList=" + hobbyList
+ ", personMap=" + personMap + ", hobbyArray=" + Arrays.toString(hobbyArray) + "]";
}
}
测试类：
package com.aimilin;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
public class XML2BeanUtilsTest {
@Test
//测试简单属性
public void testPsersonBean() throws Exception {
String xmlString = XML2BeanUtils.bean2XmlString(createPerson());
System.out.println(xmlString);
PersonBean person = XML2BeanUtils.xmlSring2Bean(PersonBean.class, xmlString);
System.out.println(person);
}
@Test
//测试复杂属性
public void testUser() throws Exception {
String xmlString = XML2BeanUtils.bean2XmlString(createUser());
System.out.println(xmlString);
User user = XML2BeanUtils.xmlSring2Bean(User.class, xmlString);
System.out.println(user);
}
public PersonBean createPerson() {
return new PersonBean("name", 23);
}
//创建复杂的用户对象
public User createUser() {
User user = new User();
user.setAge(18);
user.setUserName("张三");
user.setHobbyArray(new String[] { "篮球", "足球", "乒乓球", "羽毛球" });
user.setHobbyList(Arrays.asList(new String[] { "游泳", "蛙游", "蝶泳", "自由泳", "狗刨" }));
user.setPerson(createPerson());
Map<String, PersonBean> personMap = new HashMap<String, PersonBean>();
for (int i = 0; i < 5; i++) {
personMap.put("person" + i, new PersonBean("person" + i, i));
}
user.setPersonMap(personMap);
return user;
}
}
结果：testPsersonBean运行结果：
<?xml version='1.0' ?>
<PersonBean>
<age>23</age>
<name>name</name>
</PersonBean>PersonBean[name='name',age='23']
testUser运行结果：
<?xml version='1.0' ?>
<User>
<age>18</age>
<hobbyArray>
<hobbyArray>篮球</hobbyArray>
<hobbyArray>足球</hobbyArray>
<hobbyArray>乒乓球</hobbyArray>
<hobbyArray>羽毛球</hobbyArray>
</hobbyArray>
<hobbyList>
<hobbyList>游泳</hobbyList>
<hobbyList>蛙游</hobbyList>
<hobbyList>蝶泳</hobbyList>
<hobbyList>自由泳</hobbyList>
<hobbyList>狗刨</hobbyList>
</hobbyList>
<person>
<age>23</age>
<name>name</name>
</person>
<personMap>
<entry>
<key>person3</key>
<value>
<age>3</age>
<name>person3</name>
</value>
</entry>
<entry>
<key>person4</key>
<value>
<age>4</age>
<name>person4</name>
</value>
</entry>
<entry>
<key>person1</key>
<value>
<age>1</age>
<name>person1</name>
</value>
</entry>
<entry>
<key>person2</key>
<value>
<age>2</age>
<name>person2</name>
</value>
</entry>
<entry>
<key>person0</key>
<value>
<age>0</age>
<name>person0</name>
</value>
</entry>
</personMap>
<userName>张三</userName>
</User>
User [userName=张三, age=18, person=PersonBean[name='name',age='23'], hobbyList=[游泳, 蛙游, 蝶泳, 自由泳, 狗刨], personMap={person3=PersonBean[name='person3',age='3'], person4=PersonBean[name='person4',age='4'], person1=PersonBean[name='person1',age='1'], person2=PersonBean[name='person2',age='2'], person0=PersonBean[name='person0',age='0']}, hobbyArray=[篮球, 足球, 乒乓球, 羽毛球]]
项目下载地址：http://download.csdn.net/detail/afgasdg/4825666