JAXBContext返回生成XML

摘要: JAXBContext,xml,生成XML,JAVA生成XML,XML CDATA

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.jar
org.eclipse.persistence.asm_2.3.1.v20110908-r10021.jar
org.eclipse.persistence.core_2.3.0.v20110604-r9504.jar
org.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<NewsItem> NewsItems;

public List<NewsItem> getNewsItems() {
return NewsItems;
}
public void setNewsItems(List<NewsItem> 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