使用JAXBContext轻松实现Java和xml的互相转换方式

JAXBContext实现Java和xml的互相转换

类文件注解：@XmlRootElement不可缺少

<span style="font-size:14px;">@XmlRootElement
public class Man {
    private String name;
    private int age;
    public Student() {
        super();
    }
    public Student(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}  </span>

Java 转换 Xml：

@Test
public void testJava2Xml(){
    try {
        JAXBContext jc = JAXBContext.newInstance(Man.class);
        Marshaller ms = jc.createMarshaller();
        Man man = new Man("man",100);
        ms.marshal(man, System.out);
    } catch (JAXBException e) {
        e.printStackTrace();
    }
}

Xml 转换 Java：

@Test
public void testXml2Java() throws JAXBException{
    String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><Man><age>100</age><name>man</name></Man>";
    JAXBContext jc = JAXBContext.newInstance(Man.class);
    Unmarshaller unmar = jc.createUnmarshaller();
    Man man = (Man) unmar.unmarshal(new StringReader(xml));
    System.out.println(man.getName());
}

JAXBContext 解析 xml

前提：

package com.sgcc.load.vo;
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;

@XmlRootElement(name = "gldxresult")
@XmlAccessorType(XmlAccessType.FIELD)
public class XmlAnalysis { // 泛化, 聚合
    @XmlElement(name = "success")
    private String success;
    @XmlElement(name = "totalnum")
    private String totalnum;

    @XmlElement(name = "accounts")
    List<Accounts> accounts = new ArrayList<>();

    public List<Accounts> getAccounts() {
        return accounts;
    }

    public void setAccounts(List<Accounts> accounts) {
        this.accounts = accounts;
    }

    public String getSuccess() {
        return success;
    }

    public void setSuccess(String success) {
        this.success = success;
    }

    public String getTotalnum() {
        return totalnum;
    }

    public void setTotalnum(String totalnum) {
        this.totalnum = totalnum;
    }
}

package com.sgcc.load.vo;
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;
@SuppressWarnings("serial")
@XmlAccessorType(XmlAccessType.FIELD)
public class Accounts extends ArrayList<Account>{

   @XmlElement(name = "account")
   public List<Account> getAccount() {
            return this;
   }
}

package com.sgcc.load.vo;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
@XmlAccessorType(XmlAccessType.FIELD)
public class Account {
    @XmlElement(name = "seqid")
    private String seqid;
    @XmlElement(name = "dxid")
    private String dxid;
    @XmlElement(name = "compid")
    private String compid;
    @XmlElement(name = "rspcode")
    private String rspcode;
    @XmlElement(name = "code")
    private String code;
    @XmlElement(name = "name")
    private String name;

    public String getSeqid() {
        return seqid;
    }
    public void setSeqid(String seqid) {
        this.seqid = seqid;
    }
    public String getDxid() {
        return dxid;
    }
    public void setDxid(String dxid) {
        this.dxid = dxid;
    }
    public String getCompid() {
        return compid;
    }
    public void setCompid(String compid) {
        this.compid = compid;
    }
    public String getRspcode() {
        return rspcode;
    }
    public void setRspcode(String rspcode) {
        this.rspcode = rspcode;
    }
    public String getCode() {
        return code;
    }
    public void setCode(String code) {
        this.code = code;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

测试：

package com.sgcc.load.test;
import java.io.StringReader;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import com.sgcc.load.vo.Accounts;
import com.sgcc.load.vo.XmlAnalysis;
import groovyjarjarcommonscli.ParseException;
public class Test {

    private static XmlAnalysis transToVOs(String webserviceMsg) throws JAXBException, ParseException {
        final StringReader reader = new StringReader(webserviceMsg);
        JAXBContext ctx=JAXBContext.newInstance(new XmlAnalysis().getClass());
        Unmarshaller um=ctx.createUnmarshaller();
        XmlAnalysis ds=(XmlAnalysis)um.unmarshal(reader);
        return ds;
    }
    public static void main(String[] args) {
        String xmlMsg = "<?xml version=\"1.0\" encoding=\"GBK\"?> \n<gldxresult><success>0</success><totalnum>1</totalnum>"+
"<accounts><yzy>hahaha</yzy><account><seqid></seqid><dxid>1136005118</dxid><compid>0603</compid><rspcode>New0001</rspcode><rspmsg>值：00 没有匹配到分类</rspmsg>"+
"<code>EHBSXPZYFDC000</code><name>哈哈哈哈哈哈哈哈哈</name></account></accounts></gldxresult>";

        try{
            XmlAnalysis transToVOs = transToVOs(xmlMsg);
            for(int index = 0;index<transToVOs.getAccounts().get(0).getAccount().size();index++){
                System.out.println(transToVOs.getAccounts().get(0).getAccount().get(index).getName());
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/y534560449/article/details/73250062