??? WEB SERVICE是个好东西，好就好在它能够解决不同语言之间数据通信的问题。JAXB也是个好东西，它能在JAVA语言中实现XML和OBJECT之间的编组和解组，但是它也带来了麻烦，不能很好的共用先前已经产生的实体类或者普通类。假设我们有如此一个WSDL文件，描述了通过两个操作，通过ID获得一个部门，通过一个部门查询条件获得相应的部门对象列表：
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions xmlns:dept="http://www.example.org/soa/department"
?xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
?xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
?xmlns:xsd="http://www.w3.org/2001/XMLSchema"
?name="DepartmentWebService"
?targetNamespace="http://www.example.org/soa/department">
?<wsdl:types>
??<xsd:schema
???targetNamespace="http://www.example.org/soa/department">
???<xsd:element name="getDepart">
????<xsd:complexType>
?????<xsd:sequence>
??????<xsd:element name="in" type="xsd:int" />
?????</xsd:sequence>
????</xsd:complexType>
???</xsd:element>
???<xsd:element name="getDepartResponse">
????<xsd:complexType>
?????<xsd:sequence>
??????<xsd:element name="out" type="dept:DepartType" />
?????</xsd:sequence>
????</xsd:complexType>
???</xsd:element>
???<xsd:element name="getAllDepart">
????<xsd:complexType>
?????<xsd:sequence>
??????<xsd:element name="in" type="dept:DepartType"></xsd:element>
?????</xsd:sequence>
????</xsd:complexType>
???</xsd:element>
???<xsd:element name="getAllDepartResponse">
????<xsd:complexType>
?????<xsd:sequence>
??????<xsd:element name="out" type="dept:DepartType"
???????maxOccurs="unbounded" minOccurs="0">
??????</xsd:element>
?????</xsd:sequence>
????</xsd:complexType>
???</xsd:element>
???<xsd:complexType name="DepartType">
????<xsd:sequence>
?????<xsd:element name="id" type="xsd:int"></xsd:element>
?????<xsd:element name="depno" type="xsd:string"></xsd:element>
?????<xsd:element name="depname" type="xsd:string"></xsd:element>
?????<xsd:element name="disable" type="xsd:byte"></xsd:element>
?????<xsd:element name="createdate" type="xsd:string"></xsd:element>
????</xsd:sequence>
???</xsd:complexType>
??</xsd:schema>
?</wsdl:types>
?<wsdl:message name="getDepartRequest">
??<wsdl:part element="dept:getDepart" name="parameters" />
?</wsdl:message>
?<wsdl:message name="getDepartResponse">
??<wsdl:part element="dept:getDepartResponse" name="parameters" />
?</wsdl:message>
?<wsdl:message name="getAllDepartRequest">
??<wsdl:part name="parameters" element="dept:getAllDepart"></wsdl:part>
?</wsdl:message>
?<wsdl:message name="getAllDepartResponse">
??<wsdl:part name="parameters"
???element="dept:getAllDepartResponse">
??</wsdl:part>
?</wsdl:message>
?<wsdl:portType name="DepartmentWebService">
??<wsdl:operation name="getDepart">
???<wsdl:input message="dept:getDepartRequest" />
???<wsdl:output message="dept:getDepartResponse" />
??</wsdl:operation>
??<wsdl:operation name="getAllDepart">
???<wsdl:input message="dept:getAllDepartRequest"></wsdl:input>
???<wsdl:output message="dept:getAllDepartResponse"></wsdl:output>
??</wsdl:operation>
?</wsdl:portType>
?<wsdl:binding name="DepartmentWebServiceSOAP"
??type="dept:DepartmentWebService">
??<soap:binding style="document"
???transport="http://schemas.xmlsoap.org/soap/http" />
??<wsdl:operation name="getDepart">
???<soap:operation
????soapAction="http://www.example.org/soa/department/NewOperation" />
???<wsdl:input>
????<soap:body use="literal" />
???</wsdl:input>
???<wsdl:output>
????<soap:body use="literal" />
???</wsdl:output>
??</wsdl:operation>
?</wsdl:binding>
?<wsdl:service name="DepartmentWebService">
??<wsdl:port binding="dept:DepartmentWebServiceSOAP"
???name="DepartmentWebServiceSOAP">
???<soap:address
????location="http://www.doubleshow.com/soa/department/" />
??</wsdl:port>
?</wsdl:service>
</wsdl:definitions>
在上面的文档中我们定义了一个DepartType的类型，
<xsd:complexType name="DepartType">
????<xsd:sequence>
?????<xsd:element name="id" type="xsd:int"></xsd:element>
?????<xsd:element name="depno" type="xsd:string"></xsd:element>
?????<xsd:element name="depname" type="xsd:string"></xsd:element>
?????<xsd:element name="disable" type="xsd:byte"></xsd:element>
?????<xsd:element name="createdate" type="xsd:string"></xsd:element>
????</xsd:sequence>
???</xsd:complexType>
映射后产生的类：
package org.example.soa.department;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
/**
?* <p>Java class for DepartType complex type.
?*
?* <p>The following schema fragment specifies the expected content contained within this class.
?*
?* <pre>
?* <complexType name="DepartType">
?*?? <complexContent>
?*???? <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
?*?????? <sequence>
?*???????? <element name="id" type="{http://www.w3.org/2001/XMLSchema}int"/>
?*???????? <element name="depno" type="{http://www.w3.org/2001/XMLSchema}string"/>
?*???????? <element name="depname" type="{http://www.w3.org/2001/XMLSchema}string"/>
?*???????? <element name="disable" type="{http://www.w3.org/2001/XMLSchema}byte"/>
?*???????? <element name="createdate" type="{http://www.w3.org/2001/XMLSchema}string"/>
?*?????? </sequence>
?*???? </restriction>
?*?? </complexContent>
?* </complexType>
?* </pre>
?*
?*
?*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "DepartType",propOrder = {
??? "id",
??? "depno",
??? "depname",
??? "disable",
??? "createdate"
})
public class DepartType {
??? protected int id;
??? @XmlElement(required = true)
??? protected String depno;
??? @XmlElement(required = true)
??? protected String depname;
??? protected byte disable;
??? @XmlElement(required = true)
??? protected String createdate;
??? /**
???? * Gets the value of the id property.
???? *
???? */
??? public int getId() {
??????? return id;
??? }
??? /**
???? * Sets the value of the id property.
???? *
???? */
??? public void setId(int value) {
??????? this.id = value;
??? }
??? /**
???? * Gets the value of the depno property.
???? *
???? * @return
???? *???? possible object is
???? *???? {@link String }
???? *????
???? */
??? public String getDepno() {
??????? return depno;
??? }
??? /**
???? * Sets the value of the depno property.
???? *
???? * @param value
???? *???? allowed object is
???? *???? {@link String }
???? *????
???? */
??? public void setDepno(String value) {
??????? this.depno = value;
??? }
??? /**
???? * Gets the value of the depname property.
???? *
???? * @return
???? *???? possible object is
???? *???? {@link String }
???? *????
???? */
??? public String getDepname() {
??????? return depname;
??? }
??? /**
???? * Sets the value of the depname property.
???? *
???? * @param value
???? *???? allowed object is
???? *???? {@link String }
???? *????
???? */
??? public void setDepname(String value) {
??????? this.depname = value;
??? }
??? /**
???? * Gets the value of the disable property.
???? *
???? */
??? public byte getDisable() {
??????? return disable;
??? }
??? /**
???? * Sets the value of the disable property.
???? *
???? */
??? public void setDisable(byte value) {
??????? this.disable = value;
??? }
??? /**
???? * Gets the value of the createdate property.
???? *
???? * @return
???? *???? possible object is
???? *???? {@link String }
???? *????
???? */
??? public String getCreatedate() {
??????? return createdate;
??? }
??? /**
???? * Sets the value of the createdate property.
???? *
???? * @param value
???? *???? allowed object is
???? *???? {@link String }
???? *????
???? */
??? public void setCreatedate(String value) {
??????? this.createdate = value;
??? }
}
这个类型的内容是完全和我们在实体类的内容完全相同，但是在文档描述中我们很难用Department去替换他，其一是命名空间的问题，第二Department 是由自动映射工具生成的实体类，它的构造和DepartType文档生成有一定的差异性。
package com.doubleshow.base.resource.mapping;
import javax.xml.bind.annotation.XmlElement;
/**
?* Department entity.
?*
?* @author MyEclipse Persistence Tools
?*/
public class Department implements java.io.Serializable {
?// Fields
?private Integer id;
?private String depno;
?private String depname;
?private Byte disable;
?private String createdate;
?// Constructors
?/** default constructor */
?public Department() {
?}
?/** full constructor */
?public Department(String depno,String depname,Byte disable,
???String createdate) {
??this.depno = depno;
??this.depname = depname;
??this.disable = disable;
??this.createdate = createdate;
?}
?// Property accessors
?public Integer getId() {
??return this.id;
?}
?public void setId(Integer id) {
??this.id = id;
?}
?public String getDepno() {
??return this.depno;
?}
?public void setDepno(String depno) {
??this.depno = depno;
?}
?public String getDepname() {
??return this.depname;
?}
?public void setDepname(String depname) {
??this.depname = depname;
?}
?public Byte getDisable() {
??return this.disable;
?}
?public void setDisable(Byte disable) {
??this.disable = disable;
?}
?public String getCreatedate() {
??return this.createdate;
?}
?public void setCreatedate(String createdate) {
??this.createdate = createdate;
?}
}
现在我们对比这两个JAVA接口，就可以发现有如下几点不同：
1、DepartType 描述了字段内容的顺序，XML中的内容是按照上述propOrder 的顺序生成的，Department是按照字段名称排序生成的
2、DepartType 不能生成任何构造器，而Department有
3、DepartType注明了字段是属于元素还是属性，而Department实体类没有。
有一个相同点那就是字段的属性内容和类型是完全相同的，自然而然我们就会像用Department去替换DepartType 的内容。
根据上面文档生成的web SERVICE接口：
package com.doubleshow.soa.department;
import java.util.List;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import org.example.soa.department.DepartType;
@WebService(name = "DepartmentWebService",targetNamespace = "http://www.example.org/soa/department")
@SOAPBinding(use = SOAPBinding.Use.LITERAL,parameterStyle = SOAPBinding.ParameterStyle.WRAPPED)
public interface DepartmentWebService {
?@WebMethod(operationName = "getAllDepart",action = "http://www.example.org/soa/department/getAllDepart")
?@WebResult(name = "out",targetNamespace = "")
?public List<DepartType> getAllDepart(
???@WebParam(name = "in",targetNamespace = "http://www.example.org/soa/department")
???DepartType in);
?@WebMethod(operationName = "getDepart",action = "http://www.example.org/soa/department/getDepart")
?@WebResult(name = "out",targetNamespace = "http://www.example.org/soa/department")
?public DepartType getDepart(@WebParam(name = "in",targetNamespace = "")
?int in);
}
用Department替换DepartType生成后的，当然SERVICE实现类也要进行类似的替换。
package com.doubleshow.soa.department;
import java.util.List;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import com.doubleshow.base.resource.mapping.Department;
@WebService(name = "DepartmentWebService",parameterStyle = SOAPBinding.ParameterStyle.WRAPPED)
public interface Department WebService {
?@WebMethod(operationName = "getAllDepart",targetNamespace = "")
?public List<Department> getAllDepart(
???@WebParam(name = "in",targetNamespace = "http://www.doubleshow.com/base/resource/mapping")
???Department in);
?@WebMethod(operationName = "getDepart",targetNamespace = "http://www.doubleshow.com/base/resource/mapping")
?public Department getDepart(@WebParam(name = "in",targetNamespace = "")
?int in);
}
其他的一些参数辅助类也进行类似的替换：
GetAllDepart.java
GetAllDepartReponse.java
GetDepart.java
GetDepartResponse.java
ObjectFactory.java
如此替换之后，就就消除了不同接口之间的转换了，只不过这样做丧失了xml的灵活性，Department会将所有的属性当作元素表示，如果有些内容必须要用属性去表示，上面的替换原则就不适用了。?
