dozker--实现map 实体 DTO之间的相互转化

Dozer 是一个对象转换工具。

Dozer可以在javaBean到JavaBean之间进行递归数据复制,并且这些JavaBean可以是不同的复杂的类型,

所有的mapping，Dozer将会很直接的将名称相同的fields进行复制，如果field名不同，或者有特别的对应要求，则可以在xml中进行定义

dozer是深层复制的，即使原实体中有其他对象的引用，只要目标数据中有对应的引用对象或者配置文件中指定了对应的mapper,目标数据也会获取这个引用对象

java工具类是：

public class DozerBeanCopy {	 PRivate static DozerBeanMapper dozer = new DozerBeanMapper();	 	 public static void copy(Object source, Object destinationObject) {	        dozer.map(source, destinationObject);	 }	 	public static void main(String[] args) {				//map ->实体  对于map中和实体中属性名一样的字段会自动进行转化,不一样的字段转换不成功		Student student=new Student();		HashMap<Object, Object> map=new HashMap<Object,Object>();		map.put("id", "id");		map.put("name", "name");		map.put("age1", 11);		copy(map, student);		System.out.println(student.getName());		System.out.println(student.getAge());				//实体->dto dto->实体的相互转化,其中目标数据不一样的字段不会自动转化		Student student2=new Student("id", "name", 11);		StudentDTO sDto=new StudentDTO();		copy(student2, sDto);		System.out.println(sDto.getName());				//方式二:该方式用于数据类型不一致，或者名称不相同或者有级联关系等情况下的映射，该方式可以添加多个配置文件		Student student3=new Student("id", "name", 11);		StudentVO svo=new StudentVO();		List myMappingFiles = new ArrayList();		myMappingFiles.add("dozerBeanMapping.xml");		DozerBeanMapper mapper = new DozerBeanMapper();		mapper.setMappingFiles(myMappingFiles);		mapper.map(student3, svo);		System.out.println(svo.getNameVo());			}}配置文件如下：
<?xml version="1.0" encoding="UTF-8"?><mappings xmlns="http://dozer.sourceforge.net"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://dozer.sourceforge.net         http://dozer.sourceforge.net/schema/beanmapping.xsd"><mapping date-format="yyyy-MM-dd"><class-a>com.test.DozerBeanCopy.Student</class-a><class-b>com.test.DozerBeanCopy.StudentVO</class-b><field><a>name</a><b>nameVo</b></field><field><a>age</a><b>ageVo</b></field></mapping></mappings>
web:
1.在spring整合dozer的时候可以在spring的配置文件中加入以下代码：
<bean id="mapper" class="org.dozer.spring.DozerBeanMapperFactoryBean">      <property name="mappingFiles"><list>       <value>classpath*:dozer-config/dozerBeanMapping.xml</value>          </list>      </property>   </bean>
2.在basecontroller或者baseService下面注入这个bean
private Mappermapper ;public Mapper getMapper(){   return mapper;}public void setMapper(Mapper mapper){   this.mapper = mapper;}
3.我们把dozker交给spring去管理后就可以使用以下方式直接复制对象
getMapper().map(sourceObject,DestinationObject.class)
使用过程中的错误:
1.xml解析错误---好吧,我新建的文件,第一行写成这样了
<?xmlversion="1.0"encoding="UTF-8"?>
so,你看出来了没?应该这样 
<?xmlversion="1.0"encoding="UTF-8"?>
Caused by: org.xml.sax.SAXException: Parsing Fatal ErrorLine:    1URI:     nullMessage: White space is required before the encoding pseudo attribute in the XML declaration.	at org.dozer.loader.xml.XMLParserFactory$DozerDefaultHandler.fatalError(XMLParserFactory.java:113)	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177)	at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
2.缺少slf4j-api.jar的依赖
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)	at java.security.accessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)3.缺少commons-lang3.jar依赖
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils	at org.dozer.util.ResourceLoader.getResource(ResourceLoader.java:59)	at org.dozer.util.DefaultClassLoader.loadResource(DefaultClassLoader.java:49)	at org.dozer.config.GlobalSettings.loadGlobalSettings(GlobalSettings.java:116)4.缺少 commons-beans.jar
Caused by: java.lang.ClassNotFoundException: org.apache.commons.beanutils.ConversionException	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
总之，需要引入的jar包有：