动态生产xml格式文件

1创建一个xml文件最终来利用jaxb来生产相对的类和文件
   <?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="users">
<!-- 设置根节点 -->
<xs:annotation><xs:documentation>users</xs:documentation></xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element type="inttable" name="userid"></xs:element>
<xs:element type="xs:string" name="username"></xs:element>
<xs:element type="xs:string" name="userpwd"></xs:element>
<xs:element type="city" name="ctiyinfo" minOccurs="0" maxOccurs="unbounded"></xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<!--  -->
<xs:complexType name="city">
<xs:attribute name="cityname" type="xs:string"></xs:attribute>
<xs:attribute name="cityId" type="xs:string"></xs:attribute>
</xs:complexType>
<!--  -->
<xs:simpleType name="inttable">
<xs:restriction base="xs:integer">
<xs:maxExclusive value="100000"></xs:maxExclusive>
<xs:minInclusive value="1000"></xs:minInclusive>
</xs:restriction>
</xs:simpleType>
</xs:schema>
2 安装jaxb插件或者手动来生成对应的文件
   A.city实体类      //
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.1-b02-fcs
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
// Any modifications to this file will be lost upon recompilation of the source schema.
// Generated on: 2010.10.29 at 05:42:06 下午 CST
//


package model;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;


/**
* <p>Java class for city complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* &lt;complexType name="city">
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;attribute name="cityname" type="{http://www.w3.org/2001/XMLSchema}string" />
*       &lt;attribute name="cityId" type="{http://www.w3.org/2001/XMLSchema}string" />
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "city")
public class City {

    @XmlAttribute
    protected String cityname;
    @XmlAttribute
    protected String cityId;

    /**
     * Gets the value of the cityname property.
     *
     * @return
     *     possible object is
     *     {@link String }
     *    
     */
    public String getCityname() {
        return cityname;
    }

    /**
     * Sets the value of the cityname property.
     *
     * @param value
     *     allowed object is
     *     {@link String }
     *    
     */
    public void setCityname(String value) {
        this.cityname = value;
    }

    /**
     * Gets the value of the cityId property.
     *
     * @return
     *     possible object is
     *     {@link String }
     *    
     */
    public String getCityId() {
        return cityId;
    }

    /**
     * Sets the value of the cityId property.
     *
     * @param value
     *     allowed object is
     *     {@link String }
     *    
     */
    public void setCityId(String value) {
        this.cityId = value;
    }

}
   2.users实体类 //均为自动生产

   //
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.1-b02-fcs
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
// Any modifications to this file will be lost upon recompilation of the source schema.
// Generated on: 2010.10.29 at 05:42:06 下午 CST
//


package model;

import java.util.ArrayList;
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.XmlRootElement;
import javax.xml.bind.annotation.XmlType;


/**
* <p>Java class for anonymous complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* &lt;complexType>
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;sequence>
*         &lt;element name="userid" type="{}inttable"/>
*         &lt;element name="username" type="{http://www.w3.org/2001/XMLSchema}string"/>
*         &lt;element name="userpwd" type="{http://www.w3.org/2001/XMLSchema}string"/>
*         &lt;element name="ctiyinfo" type="{}city" maxOccurs="unbounded" minOccurs="0"/>
*       &lt;/sequence>
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "userid",
    "username",
    "userpwd",
    "ctiyinfo"
})
@XmlRootElement(name = "users")
public class Users {

    protected int userid;
    @XmlElement(required = true)
    protected String username;
    @XmlElement(required = true)
    protected String userpwd;
    protected List<City> ctiyinfo;

    public void setCtiyinfo(List<City> ctiyinfo) {
this.ctiyinfo = ctiyinfo;
}

/**
     * Gets the value of the userid property.
     *
     */
    public int getUserid() {
        return userid;
    }

    /**
     * Sets the value of the userid property.
     *
     */
    public void setUserid(int value) {
        this.userid = value;
    }

    /**
     * Gets the value of the username property.
     *
     * @return
     *     possible object is
     *     {@link String }
     *    
     */
    public String getUsername() {
        return username;
    }

    /**
     * Sets the value of the username property.
     *
     * @param value
     *     allowed object is
     *     {@link String }
     *    
     */
    public void setUsername(String value) {
        this.username = value;
    }

    /**
     * Gets the value of the userpwd property.
     *
     * @return
     *     possible object is
     *     {@link String }
     *    
     */
    public String getUserpwd() {
        return userpwd;
    }

    /**
     * Sets the value of the userpwd property.
     *
     * @param value
     *     allowed object is
     *     {@link String }
     *    
     */
    public void setUserpwd(String value) {
        this.userpwd = value;
    }

    /**
     * Gets the value of the ctiyinfo property.
     *
     * <p>
     * This accessor method returns a reference to the live list,
     * not a snapshot. Therefore any modification you make to the
     * returned list will be present inside the JAXB object.
     * This is why there is not a <CODE>set</CODE> method for the ctiyinfo property.
     *
     * <p>
     * For example, to add a new item, do as follows:
     * <pre>
     *    getCtiyinfo().add(newItem);
     * </pre>
     *
     *
     * <p>
     * Objects of the following type(s) are allowed in the list
     * {@link City }
     *
     *
     */
    public List<City> getCtiyinfo() {
        if (ctiyinfo == null) {
            ctiyinfo = new ArrayList<City>();
        }
        return this.ctiyinfo;
    }

} 
  C.产生的工厂类  
     //
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.1-b02-fcs
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
// Any modifications to this file will be lost upon recompilation of the source schema.
// Generated on: 2010.10.29 at 05:42:06 下午 CST
//


package model;

import javax.xml.bind.annotation.XmlRegistry;


/**
* This object contains factory methods for each
* Java content interface and Java element interface
* generated in the model package.
* <p>An ObjectFactory allows you to programatically
* construct new instances of the Java representation
* for XML content. The Java representation of XML
* content can consist of schema derived interfaces
* and classes representing the binding of schema
* type definitions, element declarations and model
* groups.  Factory methods for each of these are
* provided in this class.
*
*/
@XmlRegistry
public class ObjectFactory {


    /**
     * Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: model
     *
     */
    public ObjectFactory() {
    }

    /**
     * Create an instance of {@link Users }
     *
     */
    public Users createUsers() {
        return new Users();
    }

    /**
     * Create an instance of {@link City }
     *
     */
    public City createCity() {
        return new City();
    }

} 
3.添加测试类
package Jaxb;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.bind.ValidationEventLocator;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import model.City;
import model.ObjectFactory;
import model.Users;

public class Test {
public static void readXml() {

// try {
// File xmlDocument = new File("jobConfig.xml");
// JAXBContext jaxbContext = JAXBContext.newInstance();
// Unmarshaller unMarshaller = jaxbContext.createUnmarshaller();
// SchemaFactory schemaFactory = SchemaFactory
// .newInstance("http://www.w3.org/2001/XMLSchema");
// Schema schema = schemaFactory.newSchema(new File("model/xml.xsd"));
// unMarshaller.setSchema(schema);
// Customer config = (Customer) unMarshaller.unmarshal(xmlDocument);
//
// } catch (Exception e) {
// e.printStackTrace();
// }
}
public static void getXml(){
    try {
    //File xmlDocument = new File("jobConfig.xml");
JAXBContext jaxbContext = JAXBContext.newInstance("model");
Marshaller marshaller = jaxbContext.createMarshaller(); 
marshaller.setProperty(  
        Marshaller.JAXB_FORMATTED_OUTPUT,  
        true); 
marshaller.setProperty("jaxb.encoding", "gbk");
ObjectFactory factory = new ObjectFactory();
                         Users  users=factory.createUsers();
                         users.setUserid(1111);
                         users.setUserpwd("海南");
                         users.setUsername("chani");
                           City city=new City();
                         city.setCityId("湖北");
                         city.setCityname("湖南");
                         List<City> ctiyinfo=new ArrayList<City>();
                         ctiyinfo.add(city);
                         users.setCtiyinfo(ctiyinfo);
         // marshaller.marshal(customer, new FileOutputStream(xmlDocument));  
             marshaller.marshal(users,System.out);  
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
getXml();
}
public static Users xml2Datas(String resultXml) {
Unmarshaller u = validate();
Users datas = null;
try {
datas = (Users) u.unmarshal(new StringReader(resultXml));
} catch (Exception je) {
je.printStackTrace();
throw new RuntimeException("解码出错！！" + je.getMessage());
}
return datas;
}
/**
* 对xml文件解组时的验证
*
* @return boolean
*/
private static Unmarshaller validate() {
JAXBContext jc;
Unmarshaller u = null;
try {
jc = JAXBContext.newInstance("model");
u = jc.createUnmarshaller();
SchemaFactory sf = SchemaFactory
.newInstance( XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = sf.newSchema(Test.class.getResource("user.xsd"));
u.setSchema(schema);
u.setEventHandler(new ValidationEventHandler() {
public boolean handleEvent(ValidationEvent ve) {
if (ve.getSeverity() == ValidationEvent.WARNING
|| ve.getSeverity() != ValidationEvent.WARNING) {
ValidationEventLocator vel = ve.getLocator();
return false;
}
return true;
}
});
} catch (Exception e) {
e.getMessage();
}
return u;
}

/**
* 将时间类型转换为XML表示的时间类型
*
* @param date 时间
* @return XML表示的时间类型
* @author lifh
*/
    public static XMLGregorianCalendar getDate(Date date) {
        if(null == date){
            return null;
        }
        try {
            GregorianCalendar c = new GregorianCalendar();
            c.setTime(date);
            return DatatypeFactory.newInstance().newXMLGregorianCalendar(c);
        } catch (Exception e) {
            throw new Error(e);
        }
    }
}