XML与各种格式的数据进行转换的工具类

1、使用场景

一般使用的场景是与c++服务器端进行通信时，需要将对象转换为xml字符串，然后将xml字符串的数据加上指令码一起发送到服务器进行相关操作。

代码伸缩：

 @Overridepublic void cleanRoomUser(RoomOperateDto roomOperateDto) {// 验证会议室ID存不存在checkRoomExist(roomOperateDto.getRoomId());// 请求xmlString operator = StringUtils.isBlank(roomOperateDto.getOperator()) ? "" : roomOperateDto.getOperator();String appBackNotify= StringUtils.isBlank(roomOperateDto.getAppBackNotify()) ? "" : roomOperateDto.getAppBackNotify();roomOperateDto.setOperator(new String(operator.getBytes(), StandardCharsets.UTF_8));roomOperateDto.setAppBackNotify(new String(appBackNotify.getBytes(), StandardCharsets.UTF_8));ReqCleanRoomUsersBean request =new ReqCleanRoomUsersBean(roomOperateDto.getRoomId(),roomOperateDto.getOperator(), roomOperateDto.getAppBackNotify());String requestContent = ResponseXmlUtil.responseToNoHeadXml(request);// 与服务器建立连接，并发送消息NettyClient client = null;try {client = fmapiBean.getNettyClient();//重点是这个方法Response res = client.sent(NettyConstant.MODULE1, NettyConstant.COMMAND13, requestContent);String content = new String(res.getContent(), StandardCharsets.UTF_8);ResponseDefeatBean responseDefeatBean = ResponseXmlUtil.xml2Bean(content, ResponseDefeatBean.class);if (!SystemConst.SUCCESS.equals(responseDefeatBean.getCode())) {throw new ServiceException(responseDefeatBean.getCode(), responseDefeatBean.getMsg());}} catch (ServiceException ex) {throw new ServiceException(ex.getCode(), ex.getMessage());} catch (Exception ex) {throw new ServiceException(SystemConst.UNABLE_CONNECT_SERVER, "无法连接会议服务器");} finally {if (client != null) {client.close();}}}

这里具体方法每个人都不一样，关注即可，重点是下面的工具类，方便后面开发使用。

2、上工具类

/** Project Name:fmapi* File Name:ResponseXmlUtil.java* Package Name:com.hst.ces.utils* Date:2016年5月5日* Copyright (c) 2016 HST Inc. All Rights Reserved.**/package com.hst.ces.fmapirest.utils;import com.hst.ces.fmapirest.entity.responsebean.ResponseDefeatBean;
import lombok.extern.slf4j.Slf4j;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import java.io.StringReader;
import java.io.StringWriter;/*** @author Solin*/
@Slf4j
public class ResponseXmlUtil {private ResponseXmlUtil() {}/*** 格式化XML字符串*/public static String formatXml(String str) throws Exception {Document document;document = DocumentHelper.parseText(str);// 格式化输出格式OutputFormat format = OutputFormat.createPrettyPrint();// 设置xml的输出编码format.setEncoding(ConstantDefault.UTF_8);StringWriter writer = new StringWriter();// 格式化输出流XMLWriter xmlWriter = new XMLWriter(writer, format);// 将document写入到输出流xmlWriter.write(document);xmlWriter.close();return writer.toString();}/*** 将返回数据转换为XML格式(格式化、不省略头信息)*/public static String responseToXml(Object obj) {try {JAXBContext context = JAXBContext.newInstance(obj.getClass());Marshaller marshaller = context.createMarshaller();// //编码格式marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");// 是否格式化生成的xml串marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);// 是否省略xm头声明信息marshaller.setProperty(Marshaller.JAXB_FRAGMENT, false);StringWriter writer = new StringWriter();marshaller.marshal(obj, writer);return writer.toString();} catch (Exception ex) {throw new RuntimeException(ex);}}/*** 将返回数据转换为XML格式(不格式化、省略头信息)*/public static String responseToNoHeadXml(Object obj) {try {JAXBContext context = JAXBContext.newInstance(obj.getClass());Marshaller marshaller = context.createMarshaller();//编码格式marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");// 是否格式化生成的xml串marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, false);// 是否省略xm头声明信息marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);StringWriter writer = new StringWriter();marshaller.marshal(obj, writer);return writer.toString();} catch (Exception ex) {throw new RuntimeException(ex);}}/*** xml 转 对象*/public static <T> T xml2Bean(String xmlStr, Class<T> clazz) {T obj = null;try {JAXBContext jaxbContext = JAXBContext.newInstance(clazz);Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();obj = (T) unmarshaller.unmarshal(new StringReader(xmlStr));} catch (JAXBException ex) {log.error("xml 转 对象异常", ex);}return obj;}/*** 定义接口调用返回失败方法*/public static String responseDefeat(String info) {ResponseDefeatBean defeat = new ResponseDefeatBean();defeat.setCode(info);defeat.setMsg(SystemConst.RESPONSE_DEFEAT);return responseToXml(defeat);}}

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XML与各种格式的数据进行转换的工具类

目录：

1、使用场景

2、上工具类

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