用java 生成XML

1,需要的包

javax.xml.bind.jar,jaxb-api.jar，jaxb-core.jar，jaxb-impl.jar，jaxb-jxc.jar，jaxb-xjc.jar

2，XML中有<!CDATA[]]需要的包

com.springsource.javax.xml.bind-2.2.0.jar，org.eclipse.persistence.antlr_2.3.0.v20110604-r9504.jarorg.eclipse.persistence.asm_2.3.1.v20110908-r10021.jarorg.eclipse.persistence.core_2.3.0.v20110604-r9504.jarorg.eclipse.persistence.moxy_2.3.1.v20110908-r10021.jar

用回复微信消息做实例

public String replay(UserObject text, Class classs) {		JAXBContext context;		String xmlObj = null;		try {			context = JAXBContext.newInstance(classs);			Marshaller marshaller = context.createMarshaller(); 			  marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");			    // 格式化XML输出，有分行和缩进			    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);			    // 打印到控制台			   // marshaller.marshal(text, System.out);			    marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);//			    ByteArrayOutputStream baos = new ByteArrayOutputStream();			    marshaller.marshal(text, baos);			try {				 //  xmlObj = new String(baos.toByteArray());				xmlObj= baos.toString("utf-8");				//System.out.println(test);			} catch (Exception e) {				// TODO Auto-generated catch block				e.printStackTrace();			}			   		} catch (JAXBException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}		  		 // System.out.println(xmlObj);		  return xmlObj.replace(" standalone=\"yes\"", "");	}

检查XML实体类

import java.util.Calendar;import java.util.List;import javax.xml.bind.annotation.XmlAccessType;import javax.xml.bind.annotation.XmlAccessorType;import javax.xml.bind.annotation.XmlElement;import javax.xml.bind.annotation.XmlElementWrapper;import javax.xml.bind.annotation.XmlRootElement;@XmlRootElement(name="xml")@XmlAccessorType(XmlAccessType.FIELD)public class NewsObject extends UserObject{	public NewsObject(){		super.setMsgType("news");		super.setCreateTime(Calendar.getInstance().getTimeInMillis());	}	int ArticleCount;	 @XmlElementWrapper(name="Articles") 	 @XmlElement(name="item") 	List
    
      NewsItems;			public List
     
       getNewsItems() {		return NewsItems;	}	public void setNewsItems(List
      
        newsItems) {		NewsItems = newsItems;	}	public int getArticleCount() {		return ArticleCount;	}	public void setArticleCount(int articleCount) {		ArticleCount = articleCount;	}	}
      
     
    

为了生成CDATA 需要一个 jaxb.properties 文件 需要和需要生成的java类放在同一个目录 javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory