dom4j的简单使用

引入依赖

<!-- https://mvnrepository.com/artifact/org.dom4j/dom4j -->  
<dependency>  
	<groupId>org.dom4j</groupId>  
	<artifactId>dom4j</artifactId>  
	<version>2.1.1</version>  
</dependency>

编写配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<companys>
    <company id="1770294182066073601">
        <product id="1773321675404529665">
            <bom bomId="1773321675404529665" edgePlatformKey="bom1"></bom>
            <bom bomId="1773321675404529665" edgePlatformKey="bom2"></bom>
            <bom bomId="1773321675404529665" edgePlatformKey="bom3"></bom>
        </product>
        <product id="1773321675404529662">
            <bom bomId="1773321675404529663" edgePlatformKey="bom1"></bom>
            <bom bomId="1773321675404529664" edgePlatformKey="bom2"></bom>
            <bom bomId="1773321675404529665" edgePlatformKey="bom3"></bom>
        </product>
    </company>
</companys>

Springboot的Test使用

@Slf4j  
@RunWith(SpringRunner.class)  
@SpringBootTest(classes = {ApsApplication.class})  
public class TestRedis {
    @Test
    public void Test2() {
        Map<Long, Map<Long, Map<Long, String>>> companyBomMap = new HashMap<>();
        // 1. 创建SAXReader对象
        SAXReader reader = new SAXReader();
        ClassPathResource classPathResource = new ClassPathResource("CompanyProductWithBom.xml");
        try (InputStream inputStream = classPathResource.getInputStream()){
            Document read = reader.read(inputStream);
            // 2. 解析根
            Element rootElement = read.getRootElement();
            Iterator<Element> iterator = rootElement.elementIterator();
            while (iterator.hasNext()) {
                Map<Long, Map<Long, String>> productBom = new HashMap<>();
                Element companyBomList = iterator.next();
                // 3. 取属性
                Long companyId = Long.parseLong(companyBomList.attribute("id").getValue());
                // 4. 解析产品列表
                Iterator<Element> productIterator = companyBomList.elementIterator("product");
                while (productIterator.hasNext()) {
                    Map<Long, String> bomMap = new HashMap<>();
                    Element productList = productIterator.next();
                    // 5. 取属性
                    Long productId = Long.parseLong(productList.attribute("id").getValue());
                    // 6. 解析BOM列表
                    Iterator<Element> bomIterator = productList.elementIterator("bom");
                    while (bomIterator.hasNext()) {
                        Element bom = bomIterator.next();
                        String edgePlatformKey = bom.attribute("edgePlatformKey").getValue();
                        bomMap.put(Long.parseLong(bom.attribute("bomId").getValue()), edgePlatformKey);
                        productBom.put(productId, bomMap);
                    }
                }
                companyBomMap.put(companyId, productBom);
            }
        } catch (IOException | DocumentException e) {
            log.error("没有解析到配置文件", e);
            throw new ServiceException(ErrorCodeEnum.NOT_CONFIG_FILE);
        }
    }
}