JAXBContext 解析xml文件

我会带着你远行 2022-03-28 03:16 141阅读 0赞

1.xml文件 product.xml

<?xml version="1.0" encoding="UTF-8"?>
    <template>
        <startRow>3</startRow>
        <columns>
            <column>
                <col>0</col>
                <notNull>true</notNull>
                <customValue>true</customValue>
                <valueField>supplierId</valueField>
            </column>
            <column>
                <col>1</col>
                <notNull>true</notNull>
                <valueField>money</valueField>
            </column>
        </columns>
    </template>

2.新建对应的实体类 TempliateConfig.java和TemplateColumn.java

package com.dm.krystal.utils.xml;
    import javax.xml.bind.annotation.XmlAccessType;
    import javax.xml.bind.annotation.XmlAccessorType;
    import javax.xml.bind.annotation.XmlElement;
    import java.io.Serializable;
    @XmlAccessorType(XmlAccessType.FIELD)
    public class TemplateColumn implements Serializable {
        @XmlElement(name = "col")
        int col;
        @XmlElement(name = "valueField")
        String valueField;
        @XmlElement(name = "notNull")
        boolean notNull = false;
        @XmlElement(name = "customValue")
        boolean customValue = false;
        //getset略
    }

package com.dm.krystal.utils.xml;
    import javax.xml.bind.annotation.*;
    import java.util.List;
    @XmlAccessorType(XmlAccessType.FIELD)
    @XmlRootElement(name = "template")
    public class TempliateConfig {
        @XmlElement(name = "startRow")
        int startRow;
        @XmlElementWrapper(name="columns")
        @XmlElement(name = "column")
        List<TemplateColumn> columns;
       //getset略
    }

3.main 方法

package com.dm.krystal.utils.xml;
    import com.dm.krystal.utils.io.ResourceUtils;
    import org.springframework.web.context.request.RequestContextHolder;
    import org.springframework.web.context.request.ServletRequestAttributes;
    import javax.servlet.http.HttpServletRequest;
    import javax.xml.bind.JAXBContext;
    import javax.xml.bind.JAXBException;
    import javax.xml.bind.Unmarshaller;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    
    public class XmlTest {
      static   TempliateConfig templiateConfig;
        public TempliateConfig getTemplateConfig() {
            return templiateConfig;
        }
        //xml测试使用
        public static void main(String[] args) {
            try {
                JAXBContext jaxbContext = JAXBContext.newInstance(TempliateConfig.class);
                Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
                templiateConfig = (TempliateConfig) jaxbUnmarshaller.unmarshal(ResourceUtils.getResourceFileStream("classpath:excel/product.xml"));
                templiateConfig = (TempliateConfig) jaxbUnmarshaller.unmarshal(ResourceUtils.getFile("classpath:excel/product.xml"));
                templiateConfig = (TempliateConfig) jaxbUnmarshaller.unmarshal(ResourceUtils.getURL("classpath:excel/product.xml"));
                templiateConfig.getColumns();
                System.out.println(templiateConfig.getColumns().get(0).getCustomValue());
               // configSucc = true;
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (JAXBException e) {
                e.printStackTrace();
            }
        }
    }
    输出

![20190109141312744.png][]

[20190109141312744.png]: /images/20220328/dee1a9d80da64b3cbded6492d976a9bb.png