超强大的XML和JavaBean相互转换的工具类

深碍√TFBOYSˉ_ 2022-04-12 02:25 702阅读 0赞

import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.Reader;
    import java.io.StringWriter;
    import java.text.MessageFormat;
    import javax.xml.bind.JAXBContext;
    import javax.xml.bind.JAXBException;
    import javax.xml.bind.Marshaller;
    import javax.xml.bind.Unmarshaller;
    import javax.xml.stream.XMLOutputFactory;
    import javax.xml.stream.XMLStreamWriter;
    
    /**
     * @Description:xml字符串转换Javabean
     * @author:lgh
     * @date: 2018-11-20 10:55
     */
    
    public class JaxbUtils {
    
        @SuppressWarnings("unchecked")
        private static <T> T readString(Class<T> clazz, String context)
                throws JAXBException {
            try {
                JAXBContext jc = JAXBContext.newInstance(clazz);
                Unmarshaller u = jc.createUnmarshaller();
                return (T) u.unmarshal(new File(context));
            } catch (JAXBException e) {
                throw e;
            }
        }
    
        @SuppressWarnings("unchecked")
        private static <T> T readConfig(Class<T> clazz, String config,
                                        Object... arguments) throws IOException, JAXBException {
            InputStream is = null;
            try {
                if (arguments.length > 0) {
                    config = MessageFormat.format(config, arguments);
                }
                JAXBContext jc = JAXBContext.newInstance(clazz);
                Unmarshaller u = jc.createUnmarshaller();
                is = new FileInputStream(config);
                return (T) u.unmarshal(is);
            } catch (IOException e) {
                throw e;
            } catch (JAXBException e) {
                throw e;
            } finally {
                if (is != null) {
                    is.close();
                }
            }
        }
    
        @SuppressWarnings("unchecked")
        private static <T> T readConfigFromStream(Class<T> clazz,
                                                  InputStream dataStream) throws JAXBException {
            try {
                JAXBContext jc = JAXBContext.newInstance(clazz);
                Unmarshaller u = jc.createUnmarshaller();
                return (T) u.unmarshal(dataStream);
            } catch (JAXBException e) {
                // logger.trace(e);
                throw e;
            }
        }
    
        @SuppressWarnings("unchecked")
        private static <T> T readConfigFromRead(Class<T> clazz, Reader reader)throws JAXBException
        {
            try {
                JAXBContext jc = JAXBContext.newInstance(clazz);
                Unmarshaller u = jc.createUnmarshaller();
                return (T) u.unmarshal(reader);
            } catch (JAXBException e) {
                // logger.trace(e);
                throw e;
            }
        }
        /**
         * xml转换成java bean
         * @param xml
         * @param clazz
         * @return
         * @throws JAXBException
         */
        public static <T> T jaxbConvertXmlToBean(String xml,Class<T> clazz) {
            InputStream is = null;
            try {
                is = new ByteArrayInputStream(xml.getBytes("UTF-8"));
    
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (is != null) {
                    try {
                        is.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            T t = null;
            try {
                t = JaxbUtils.readConfigFromStream(clazz, is);
            } catch (JAXBException e) {
                e.printStackTrace();
            }
            return t;
        }
        /**
         * java bean 转换成xml
         * @param object
         * @return
         * @throws JAXBException
         */
        public static String  jaxbConvertBeanToXml(Object object)throws JAXBException {
            StringWriter writer = new StringWriter();
            String returnString ="";
            try {
                JAXBContext jc = JAXBContext.newInstance(object.getClass());
                Marshaller m = jc.createMarshaller();
                m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
                m.marshal(object, writer);
                returnString=writer.toString();
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if(writer!=null){
                    try {
                        writer.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
    
            return  returnString;
        }
        public static String jaxbBeanToxml(Object object){
            try {
                JAXBContext jaxbContext = JAXBContext.newInstance(object.getClass());
                Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
                jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
                jaxbMarshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                XMLStreamWriter xmlStreamWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(baos, (String) jaxbMarshaller.getProperty(Marshaller.JAXB_ENCODING));
                xmlStreamWriter.writeStartDocument((String) jaxbMarshaller.getProperty(Marshaller.JAXB_ENCODING), "1.0");
                jaxbMarshaller.marshal(object, xmlStreamWriter);
                xmlStreamWriter.writeEndDocument();
                xmlStreamWriter.close();
                return new String(baos.toByteArray(),"UTF-8");
    
            } catch (Exception e) {
            }
            return null;
    
    
        }
        public static String jaxbBeanToxmlGBK(Object object){
            try {
                JAXBContext jaxbContext = JAXBContext.newInstance(object.getClass());
                Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
                jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING, "GBK");
                jaxbMarshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                XMLStreamWriter xmlStreamWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(baos, (String) jaxbMarshaller.getProperty(Marshaller.JAXB_ENCODING));
                xmlStreamWriter.writeStartDocument((String) jaxbMarshaller.getProperty(Marshaller.JAXB_ENCODING), "1.0");
                jaxbMarshaller.marshal(object, xmlStreamWriter);
                xmlStreamWriter.writeEndDocument();
                xmlStreamWriter.close();
                return new String(baos.toByteArray(),"GBK");
    
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
    
    
        }
        /**
         * xml转换成java bean
         * @param xml
         * @param clazz
         * @return
         * @throws JAXBException
         */
        public static <T> T jaxbConvertXmlToBeanByGbk(String xml,Class<T> clazz) {
            InputStream is = null;
            try {
                is = new ByteArrayInputStream(xml.getBytes("GBK"));
    
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (is != null) {
                    try {
                        is.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            T t = null;
            try {
                t = JaxbUtils.readConfigFromStream(clazz, is);
            } catch (JAXBException e) {
                e.printStackTrace();
            }
            return  t;
        }
    
    }

针对上述工具类，给记得给JavaBean加上相应注解如下：

@XmlAccessorType(XmlAccessType.FIELD)
    @XmlRootElement(name = "TransType")
    @Data
    public class TransType {
    
        @XmlElement(name = "BaseInfo",required = true)
        protected BaseInfo baseInfo;
        @XmlElement(name = "OutputData",required = true)
        protected OutputData outputData;

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