在项目中使用Apache开源的Services Framework CXF来发布WebService，CXF能够很简洁与Spring Framework 集成在一起，在发布WebService的过程中，发布的接口的入参有些类型支持不是很好，比如Timestamp和Map。这个时候我们就需要编写一些适配来实行类型转换。
TimestampAdapter.java
package com.loongtao.general.crawler.webservice.utils;import java.sql.Timestamp;import javax.xml.bind.annotation.adapters.XmlAdapter;/*** <java.sql.Timestamp类型转换> <功能详细描述>* 在相应的字段前面 加上 @XmlJavaTypeAdapter(TimestampAdapter.class)* @author Lilin*/ public class TimestampAdapter extends XmlAdapter<String, Timestamp> {/*** <一句话功能简述> <功能详细描述>* * @param time* @return* @throws Exception* @see [类、类#方法、类#成员]*/public String marshal(Timestamp time) throws Exception {return DateUtil.timestamp2Str(time);}/*** <一句话功能简述> <功能详细描述>* * @param v* @throws Exception* @see [类、类#方法、类#成员]*/public Timestamp unmarshal(String str) throws Exception {return DateUtil.str2Timestamp(str);} }
DateUtil.java
package com.loongtao.general.crawler.webservice.utils;import java.sql.Timestamp; import java.text.SimpleDateFormat; import java.util.Date; import java.text.ParseException;import org.apache.log4j.Logger;/*** <一句话功能简述> <功能详细描述>* * @author Lilin* @version* @see [相关类/方法]* @since [产品/模块版本]*/ public class DateUtil {/*** 注释内容*/private static final Logger log = Logger.getLogger(DateUtil.class);/*** 默认日期格式*/private static final String DEFAULT_FORMAT = "yyyy-MM-dd HH:mm:ss";/*** <默认构造函数>*/private DateUtil() {}/*** <字符串转换成日期> <如果转换格式为空，则利用默认格式进行转换操作>* * @param str* 字符串* @param format* 日期格式* @return 日期* @see [类、类#方法、类#成员]*/public static Date str2Date(String str, String format) {if (null == str || "".equals(str)) {return null;}// 如果没有指定字符串转换的格式，则用默认格式进行转换if (null == format || "".equals(format)) {format = DEFAULT_FORMAT;}SimpleDateFormat sdf = new SimpleDateFormat(format);Date date = null;try {date = sdf.parse(str);return date;} catch (ParseException e) {log.error("Parse string to date error!String : " + str);}return null;}/*** <一句话功能简述> <功能详细描述>* * @param date* 日期* @param format* 日期格式* @return 字符串* @see [类、类#方法、类#成员]*/public static String date2Str(Date date, String format) {if (null == date) {return null;}SimpleDateFormat sdf = new SimpleDateFormat(format);return sdf.format(date);}/*** <时间戳转换为字符串> <功能详细描述>* * @param time* @return* @see [类、类#方法、类#成员]*/public static String timestamp2Str(Timestamp time) {Date date = new Date(time.getTime());return date2Str(date, DEFAULT_FORMAT);}/*** <一句话功能简述> <功能详细描述>* * @param str* @return* @see [类、类#方法、类#成员]*/public static Timestamp str2Timestamp(String str) {Date date = str2Date(str, DEFAULT_FORMAT);return new Timestamp(date.getTime());} }
在具体的Java Bean 中，通过@XmlJavaTypeAdapter注解来通知CXF进行类型转换，具体请看ErrInfo中的属性timestamp的getter 和setter
/* * Copyright (c) 2014-2024 . All Rights Reserved. * * This software is the confidential and proprietary information of * LoongTao. You shall not disclose such Confidential Information * and shall use it only in accordance with the terms of the agreements * you entered into with LoongTao. * */ package com.loongtao.general.crawler.webservice.vo;import java.io.Serializable; import java.sql.Timestamp;import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;import com.loongtao.general.crawler.webservice.utils.TimestampAdapter;/*** @declare: 下载失败信息<br>* @author: cphmvp* @version: 1.0* @date: 2014年9月22日下午3:47:26*/ public class ErrInfo implements Serializable {/*** */private static final long serialVersionUID = -5298849636495962631L;private String ip;public String getIp() {return ip;}public void setIp(String ip) {this.ip = ip;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public int getArticleMediaId() {return articleMediaId;}public void setArticleMediaId(int articleMediaId) {this.articleMediaId = articleMediaId;}@XmlJavaTypeAdapter(TimestampAdapter.class)public Timestamp getTimestamp() {return timestamp;}public void setTimestamp(Timestamp timestamp) {this.timestamp = timestamp;}private String url;private int articleMediaId;private Timestamp timestamp;}
这个时候CXF解析Java Bean ErrInfo的时候，解析到@XmlJavaTypeAdapter注解时候就会以TimestampAdapter这个适配器来进行Timestamp与String之间的转换。
Map：
用xstream将Map转换成String
package com.loongtao.general.crawler.webservice.utils;import java.util.HashMap; import java.util.Map;import javax.xml.bind.annotation.adapters.XmlAdapter;import org.apache.cxf.aegis.type.java5.XmlType;import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.io.xml.DomDriver; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; /*** <数据模型转换> <Map<String,Object> 与 String之间的转换>* * @author Lilin* @version* @see [相关类/方法]* @since [产品/模块版本]*/ @XmlType(name = "MapAdapter") @XmlAccessorType(XmlAccessType.FIELD) public class MapAdapter extends XmlAdapter<String, Map<String, Object>> {/*** Convert a bound type to a value type. 转换JAXB不支持的对象类型为JAXB支持的对象类型* * @param map* map The value to be convereted. Can be null.* @return String* @throws Exception* if there's an error during the conversion. The caller is* responsible for reporting the error to the user through* {@link javax.xml.bind.ValidationEventHandler}.*/public String marshal(Map<String, Object> map) throws Exception {XStream xs = new XStream(new DomDriver());return xs.toXML(map);}/*** Convert a value type to a bound type. 转换JAXB支持的对象类型为JAXB不支持的的类型* * @param model* The value to be converted. Can be null.* @return Map<String,Object>* @throws Exception* if there's an error during the conversion. The caller is* responsible for reporting the error to the user through* {@link javax.xml.bind.ValidationEventHandler}.*/@SuppressWarnings("unchecked")public Map<String, Object> unmarshal(String model) throws Exception {XStream xs = new XStream(new DomDriver());return (HashMap) xs.fromXML(model);} }
