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); } }