? ? ? 在項目中使用Apache開源的Services Framework CXF來發布WebService，CXF能夠很簡潔與Spring Framework 集成在一起，在發布WebService的過程中，發布的接口的入參有些類型支持不是很好，比如Timestamp和Map。這個時候我們就需要編寫一些適配來實行類型轉換。

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TimestampAdapter.java

package com.loongtao.general.crawler.webservice.utils;import java.sql.Timestamp;import javax.xml.bind.annotation.adapters.XmlAdapter;/*** <java.sql.Timestamp類型轉換> <功能詳細描述>* 在相應的字段前面  加上  @XmlJavaTypeAdapter(TimestampAdapter.class)* @author Lilin*/
public class TimestampAdapter extends XmlAdapter<String, Timestamp> {/*** <一句話功能簡述> <功能詳細描述>* * @param time* @return* @throws Exception* @see [類、類#方法、類#成員]*/public String marshal(Timestamp time) throws Exception {return DateUtil.timestamp2Str(time);}/*** <一句話功能簡述> <功能詳細描述>* * @param v* @throws Exception* @see [類、類#方法、類#成員]*/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;/*** <一句話功能簡述> <功能詳細描述>* * @author Lilin* @version* @see [相關類/方法]* @since [產品/模塊版本]*/
public class DateUtil {/*** 注釋內容*/private static final Logger log = Logger.getLogger(DateUtil.class);/*** 默認日期格式*/private static final String DEFAULT_FORMAT = "yyyy-MM-dd HH:mm:ss";/*** <默認構造函數>*/private DateUtil() {}/*** <字符串轉換成日期> <如果轉換格式為空，則利用默認格式進行轉換操作>* * @param str*            字符串* @param format*            日期格式* @return 日期* @see [類、類#方法、類#成員]*/public static Date str2Date(String str, String format) {if (null == str || "".equals(str)) {return null;}// 如果沒有指定字符串轉換的格式，則用默認格式進行轉換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;}/*** <一句話功能簡述> <功能詳細描述>* * @param date*            日期* @param format*            日期格式* @return 字符串* @see [類、類#方法、類#成員]*/public static String date2Str(Date date, String format) {if (null == date) {return null;}SimpleDateFormat sdf = new SimpleDateFormat(format);return sdf.format(date);}/*** <時間戳轉換為字符串> <功能詳細描述>* * @param time* @return* @see [類、類#方法、類#成員]*/public static String timestamp2Str(Timestamp time) {Date date = new Date(time.getTime());return date2Str(date, DEFAULT_FORMAT);}/*** <一句話功能簡述> <功能詳細描述>* * @param str* @return* @see [類、類#方法、類#成員]*/public static Timestamp str2Timestamp(String str) {Date date = str2Date(str, DEFAULT_FORMAT);return new Timestamp(date.getTime());}
}

在具體的Java Bean 中，通過@XmlJavaTypeAdapter注解來通知CXF進行類型轉換，具體請看ErrInfo中的屬性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: 下載失敗信息<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;}

這個時候CXF解析Java Bean ErrInfo的時候，解析到@XmlJavaTypeAdapter注解時候就會以TimestampAdapter這個適配器來進行Timestamp與String之間的轉換。

Map：

用xstream將Map轉換成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;  /*** <數據模型轉換> <Map<String,Object> 與 String之間的轉換>* * @author Lilin* @version* @see [相關類/方法]* @since [產品/模塊版本]*/
@XmlType(name = "MapAdapter")
@XmlAccessorType(XmlAccessType.FIELD)
public class MapAdapter extends XmlAdapter<String, Map<String, Object>> {/*** Convert a bound type to a value type. 轉換JAXB不支持的對象類型為JAXB支持的對象類型* * @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. 轉換JAXB支持的對象類型為JAXB不支持的的類型* * @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);}
}

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轉載于:https://www.cnblogs.com/gisblogs/p/3988128.html

總結

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