kmall-haikong/kmall-admin/src/main/java/com/kmall/admin/haikong/utils/XmlUtils.java

package com.kmall.admin.haikong.utils;

import com.kmall.admin.haikong.dto.WareQueryStockResponseDTO;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Objects;

/**
 * @author lhm
 * @createDate 2021-11-12
 */
public class XmlUtils {

    /**
     * 对象转xml文本
     * @param obj       对象
     * @param format    是否格式化
     * @return          xml文本
     */
    public static String toXml(Object obj, boolean format) throws Exception {
        try {
            JAXBContext context = JAXBContext.newInstance(obj.getClass());
            Marshaller marshaller = context.createMarshaller();

            //编码格式
            marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
            marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.FALSE);

            // 是否格式化生成的xml串
            if (format) {
                marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
            } else {
                marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.FALSE);
            }

            // 是否省略xm头声明信息
            marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

            StringWriter writer = new StringWriter();
            writer.write("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
            marshaller.marshal(obj, writer);
            return writer.toString();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * xml 转对象
     *
     * @param xml
     * @param c
     * @return
     */
    public static <T> Object toObject(String xml, Class<T> c) throws Exception {
        Reader reader = null;
        try {
            JAXBContext context = JAXBContext.newInstance(c);
            // XML 转为对象的接口
            Unmarshaller unmarshaller = context.createUnmarshaller();

            reader = new StringReader(xml);

            return unmarshaller.unmarshal(reader);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            if (Objects.nonNull(reader)) {
                reader.close();
            }
        }
    }


    public static void main(String[] args) throws Exception {
        String response = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
                "<response>\n" +
                "    <flag>success|failure</flag>\n" +
                "    <code>响应码</code>\n" +
                "    <message>响应信息</message>\n" +
                "    <items>\n" +
                "        <item>\n" +
                "            <warehouseCode>仓库编码, string (50)</warehouseCode>\n" +
                "            <itemCode>商品编码, string (50) , 必填</itemCode>\n" +
                "            <itemId>仓储系统商品ID, string (50)，条件必填</itemId>\n" +
                "            <inventoryType>库存类型，string (50) , ZP=正品, CC=残次,JS=机损, XS= 箱损, ZT=在途库存</inventoryType>\n" +
                "            <imperfectGrade>残品等级，string (50) ,AG=一级残，BG=二级残，CG=三级残 ,退货仓使用</imperfectGrade>\n" +
                "            <quantity>1</quantity>\n" +
                "            <lockQuantity>1</lockQuantity>\n" +
                "            <batchCode>批次编码, string (50)</batchCode>\n" +
                "            <productDate>商品生产日期 YYYY-MM-DD，条件必填</productDate>\n" +
                "            <expireDate>商品过期日期YYYY-MM-DD，条件必填</expireDate>\n" +
                "            <produceCode>生产批号, string (50)</produceCode>\n" +
                "            <extendProps>扩展属性 \n" +
                "        \n" +
                "                <key1>value1</key1>\n" +
                "                <key2>value2</key2>\n" +
                "            </extendProps>\n" +
                "        </item>\n" +
                "    </items>\n" +
                "</response>";

        WareQueryStockResponseDTO o = (WareQueryStockResponseDTO) toObject(response, WareQueryStockResponseDTO.class);

        System.out.println(o);
    }

}