例如,下面这段XML数据,有多个data元素,并且它们级别相同:
csharp
<?xml version="1.0" encoding="UTF-8"?>
<request>
<reqtype>05</reqtype>
<secret>test</secret>
<body>
<userid>15</userid>
<seeid>1001</seeid>
<time>202311201510</time>
<data>
<type>01</type>
<value>219</value>
</data>
<data>
<type>02</type>
<value>217</value>
</data>
</body>
</request>
要用JAXB注解将Java类映射到上面的XML,示例如下:
映射xml request元素、及下面一级子元素的Java类:
csharp
package com.thb.server.fulldata;
import jakarta.xml.bind.annotation.XmlElement;
import jakarta.xml.bind.annotation.XmlRootElement;
import jakarta.xml.bind.annotation.XmlType;
/**
* 该类映射到http请求的xml
* @author thb
*
*/
// 使用了JAXB注解,映射到xml中的request元素
@XmlRootElement(name = "request")
@XmlType(propOrder = {"reqtype", "secret", "fullDataContent"})
public class FullDataRequest {
private String reqtype;
private String secret;
private FullDataContent fullDataContent;
// 使用了JAXB注解,映射到xml中的reqtype元素
@XmlElement(name="reqtype", required = true)
public String getReqtype() {
return this.reqtype;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setReqtype(String reqtype) {
this.reqtype = reqtype;
}
// 使用了JAXB注解,映射到xml中的secret元素
@XmlElement(name="secret", required = true)
public String getSecret() {
return this.secret;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setSecret(String secret) {
this.secret = secret;
}
// 使用了JAXB注解,映射到xml中的body元素
@XmlElement(name="body", required = true)
public FullDataContent getFullDataContent() {
return this.fullDataContent;
}
public void setFullDataContent(FullDataContent fullDataContent) {
this.fullDataContent = fullDataContent;
}
}
映射xml body子元素、及下面一级子元素的Java类:
csharp
package com.thb.server.fulldata;
import jakarta.xml.bind.annotation.XmlElement;
import jakarta.xml.bind.annotation.XmlType;
@XmlType(propOrder = {"userid", "seeid", "time", "items"})
class FullDataContent {
private String userid;
private String seeid;
private String time;
private Item[] items;
// 使用了JAXB注解,映射到xml中body元素下面的userid元素
@XmlElement(name="userid", required = true)
public String getUserid() {
return this.userid;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setUserid(String userid) {
this.userid = userid;
}
// 使用了JAXB注解,映射到xml中body元素下面的seeid元素
@XmlElement(name="seeid", required = true)
public String getSeeid() {
return this.seeid;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setSeeid(String seeid) {
this.seeid = seeid;
}
// 使用了JAXB注解,映射到xml中body元素下面的time元素
@XmlElement(name="time", required = true)
public String getTime() {
return this.time;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setTime(String time) {
this.time = time;
}
// 使用了JAXB注解,映射到xml中body元素下面的data元素
@XmlElement(name="data", required = true)
public Item[] getItems() {
return this.items;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setItems(Item[] items) {
this.items = items;
}
}
映射到xml data子元素、及下面一级子元素的Java类:
csharp
package com.thb.server.fulldata;
import jakarta.xml.bind.annotation.XmlElement;
import jakarta.xml.bind.annotation.XmlType;
@XmlType(propOrder = {"type", "value"})
public class Item {
private String type;
private String value;
// 使用了JAXB注解,映射到xml中body元素下面-》data子元素下面-》type子元素
@XmlElement(name="type", required = true)
public String getType() {
return this.type;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setType(String type) {
this.type = type;
}
// 使用了JAXB注解,映射到xml中body元素下面-》data子元素下面-》value子元素
@XmlElement(name="value", required = true)
public String getValue() {
return this.value;
}
// 此处的setter函数要有,否则从xml反序列到java对象的时候无法赋值
public void setValue(String value) {
this.value = value;
}
}
下面来生成Java类的xml schema文件,运行
csharp
schemagen -d D:\temp\outschema -cp D:\temp\eclipse-workspace\java_work\power-restful-webservice-server\src\main\java D:\temp\eclipse-workspace\java_work\power-restful-webservice-server\src\main\java\com\thb\server\fulldata\FullDataRequest.java
生成的schema文件内容:
csharp
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema version="1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="request" type="fullDataRequest"/>
<xs:complexType name="fullDataRequest">
<xs:sequence>
<xs:element name="reqtype" type="xs:string"/>
<xs:element name="secret" type="xs:string"/>
<xs:element name="body" type="fullDataContent"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="fullDataContent">
<xs:sequence>
<xs:element name="userid" type="xs:string"/>
<xs:element name="seeid" type="xs:string"/>
<xs:element name="time" type="xs:string"/>
<xs:element name="data" type="item" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="item">
<xs:sequence>
<xs:element name="type" type="xs:string"/>
<xs:element name="value" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
将web服务部署到Tomcat,用Postman访问,成功返回了响应:
在服务端正确打印了映射到Java对象中的信息: