彩票项目之协议分析，封装

来源：互联网发布：mysql exist的用法编辑：程序博客网时间：2024/04/30 11:28

说实话听着这个视频，黑马的彩票视频我看了五遍关于协议的封装我自己觉得很难懂不过搞懂以后我自己学到了很多。

关于封装，也是因为项目需要，不过确实对代码，结构优化了很多。我自己在认真的总结。

前一篇已经把一个节点已经生成完了，

再看 body这个节点有着element这个子节点然后不会将所有的请求用到的叶子放到Element中 Element将作为所有请求的代表，Element所有请求的公共部分

公共部分：
①每个请求都需要序列化自己

这个element需要抽象或者作为一个接口约束自己的孩子

element

package com.xiaoxin.CaiPiao.net.protocal;import org.xmlpull.v1.XmlSerializer;/** * 请求数据的封装 *  * @author Administrator * 可以使用抽象或者接口约束自己的孩子 */public abstract class Element {// 不会将所有的请求用到的叶子放到Element中// Element将作为所有请求的代表，Element所有请求的公共部分// 公共部分：// ①每个请求都需要序列化自己/** * 每个请求都需要序列化自己 * @param serializer */public abstract void serializerElement(XmlSerializer serializer);// ②每个请求都有自己的标示/** * 每个请求都有自己的标示 * @return */public abstract String getTransactionType();// 包含内容// 序列化// 特有：请求标示// <lotteryid>118</lotteryid>//private Leaf lotteryid = new Leaf("lotteryid");// <issues>1</issues>//private Leaf issues = new Leaf("issues", "1");//public Leaf getLotteryid() {//return lotteryid;//}///**// * 序列化请求// *///public void serializerElement(XmlSerializer serializer) {//try {//serializer.startTag(null, "element");//lotteryid.serializerLeaf(serializer);//issues.serializerLeaf(serializer);//serializer.endTag(null, "element");//} catch (Exception e) {//e.printStackTrace();//}//}///**// * 获取请求的标示// *///public String getTransactionType() {//return "12002";//}}

其实这么做很方便以后代码的维护和更新因为在子孩子里面只需要继承element 子孩子要求如下

①必须继承Element
如：获取当前销售期请求
public class CurrentIssueElement extends Element
②处理Element的两个方法
需要结合接口文档，获取当前销售期请求
// <lotteryid>118</lotteryid>
private Leaf lotteryid = new Leaf("lotteryid");
// <issues>1</issues>
private Leaf issues = new Leaf("issues", "1");

@Override
public void serializerElement(XmlSerializer serializer) {
try {
serializer.startTag(null, "element");
lotteryid.serializerLeaf(serializer);
issues.serializerLeaf(serializer);
serializer.endTag(null, "element");
} catch (Exception e) {
e.printStackTrace();
}
}

@Override
public String getTransactionType() {
return "12002";
}

然后再看下子孩子CurrentIssueElement .java

package com.xiaoxin.CaiPiao.net.protocal.element;import org.xmlpull.v1.XmlSerializer;import com.xiaoxin.CaiPiao.net.protocal.Element;import com.xiaoxin.CaiPiao.net.protocal.Leaf;public class CurrentIssueElement extends Element{// <lotteryid>118</lotteryid>private Leaf lotteryid = new Leaf("lotteryid");// <issues>1</issues>private Leaf issues = new Leaf("issues", "1");@Overridepublic void serializerElement(XmlSerializer serializer) {try {serializer.startTag(null, "element");lotteryid.serializerLeaf(serializer);issues.serializerLeaf(serializer);serializer.endTag(null, "element");} catch (Exception e) {e.printStackTrace();}}@Overridepublic String getTransactionType() {return "12002";}public Leaf getLotteryid() {return lotteryid;}}

可以看的出来子孩子制作了包含内容以及序列化这样子便于以后协议的修改和添加

看了这里我们需要看看body 内容因为因为body 要把element子节点封装进去序列化

/** * <body>            <elements>                  <element>                         <lotteryid>118</lotteryid>                         <issues>1</issues>                  </element>            </elements>      </body> */

package com.xiaoxin.CaiPiao.net.protocal;import java.io.StringWriter;import java.util.ArrayList;import java.util.List;import org.apache.commons.lang3.StringUtils;import org.xmlpull.v1.XmlSerializer;import android.util.Xml;import com.xiaoxin.CaiPiao.ConstantValue;import com.xiaoxin.CaiPiao.utils.DES;/** * 消息体结点封装 * @author Administrator * */public class Body {//因为不止一个elements内容 所以 需要一个集合来接受private List<Element> elements=new ArrayList<Element>();/*********************处理服务器回复*************************/private String serviceBodyInsideDESInfo;//服务器端回复的body中的DES加密的信息private Oelement oelement=new Oelement();public Oelement getOelement() {return oelement;}public String getServiceBodyInsideDESInfo() {return serviceBodyInsideDESInfo;}public void setServiceBodyInsideDESInfo(String serviceBodyInsideDESInfo) {this.serviceBodyInsideDESInfo = serviceBodyInsideDESInfo;}/*********************处理服务器回复*************************/public List<Element> getElements() {return elements;}/** * 序列化请求 */public void serializerBody(XmlSerializer serializer) {/** * <body>            <elements>                  <element>                         <lotteryid>118</lotteryid>                         <issues>1</issues>                  </element>            </elements>      </body> */try {serializer.startTag(null, "body");serializer.startTag(null, "elements");for(Element item:elements){item.serializerElement(serializer);}serializer.endTag(null, "elements");serializer.endTag(null, "body");} catch (Exception e) {e.printStackTrace();}}/** * 获取到完整的body * @return */public String getWholeBody(){StringWriter writer=new StringWriter();XmlSerializer temp=Xml.newSerializer();try {temp.setOutput(writer);this.serializerBody(temp);// output will be flushedtemp.flush();return writer.toString();} catch (Exception e) {e.printStackTrace();}return null;}/** * 获取body里面的DES加密数据 * @return */public String getBodyInsideDESInfo(){// 加密数据String wholeBody = getWholeBody();String orgDesInfo=StringUtils.substringBetween(wholeBody, "<body>", "</body>");// 加密// 加密调试——2天// ①加密算法实现不同// ②加密的原始数据不同DES des=new DES();return des.authcode(orgDesInfo, "DECODE", ConstantValue.DES_PASSWORD);}}

message.xml 终结点有一个attribute属性

package com.xiaoxin.CaiPiao.net.protocal;import java.io.StringWriter;import org.xmlpull.v1.XmlSerializer;import android.util.Xml;import com.xiaoxin.CaiPiao.ConstantValue;/** * 协议封装 *  * @author Administrator *  */public class Message {private Header header = new Header();private Body body = new Body();public Header getHeader() {return header;}public Body getBody() {return body;}/** * 序列化协议 */public void serializerMessage(XmlSerializer serializer) {try {// <message version="1.0">serializer.startTag(null, "message");// MUST follow a call to startTag() immediatelyserializer.attribute(null, "version", "1.0");header.serializerHeader(serializer, body.getWholeBody());// 获取完整的body//body.serializerBody(serializer);serializer.startTag(null, "body");serializer.text(body.getBodyInsideDESInfo());serializer.endTag(null, "body");serializer.endTag(null, "message");} catch (Exception e) {e.printStackTrace();}}/** * 获取请求的xml文件 *  * @return */public String getXml(Element element) {if (element == null) {throw new IllegalArgumentException("element is null");}// 请求标示需要设置，请求内容需要设置header.getTransactiontype().setTagValue(element.getTransactionType());body.getElements().add(element);// 序列化XmlSerializer serializer = Xml.newSerializer();StringWriter writer = new StringWriter();// This method can only be called just after setOutputtry {serializer.setOutput(writer);serializer.startDocument(ConstantValue.ENCONDING, null);this.serializerMessage(serializer);serializer.endDocument();return writer.toString();} catch (Exception e) {e.printStackTrace();}return null; }// 需要处理的问题：// ①MD5处理时需要完整的明文body// ②请求标示需要设置，请求内容需要设置// ③加密body里面的数据// ④Element通用}

生成xml的代码就简单了

package com.xiaoxin.CaiPiao.test;import java.io.StringWriter;import org.xmlpull.v1.XmlSerializer;import com.xiaoxin.CaiPiao.ConstantValue;import com.xiaoxin.CaiPiao.net.protocal.Message;import com.xiaoxin.CaiPiao.net.protocal.element.CurrentIssueElement;import com.xiaoxin.CaiPiao.utils.BeanFactory;import android.test.AndroidTestCase;import android.util.Log;import android.util.Xml;public class XmlTest extends AndroidTestCase {private static final String TAG = "XmlTest";public void createXMl() {Message message = new Message();CurrentIssueElement element = new CurrentIssueElement();element.getLotteryid().setTagValue("118");String xml = message.getXml(element);Log.i(TAG, xml);}public void createXMl2() {// 序列化XmlSerializer serializer = Xml.newSerializer();StringWriter writer = new StringWriter();// This method can only be called just after setOutputtry {serializer.setOutput(writer);serializer.startDocument(ConstantValue.ENCONDING, null);Message message = new Message();message.serializerMessage(serializer);serializer.endDocument();} catch (Exception e) {e.printStackTrace();}}public void createXMl1() {// 序列化XmlSerializer serializer = Xml.newSerializer();StringWriter writer = new StringWriter();// This method can only be called just after setOutputtry {//生成一个XMLserializer.setOutput(writer);serializer.startDocument(ConstantValue.ENCONDING, null);serializer.startTag(null, "message");serializer.startTag(null, "header");serializer.startTag(null, "agenterid");serializer.text(ConstantValue.AGENTERID);serializer.endTag(null, "agenterid");serializer.startTag(null, "agenterid");serializer.text(ConstantValue.AGENTERID);serializer.endTag(null, "agenterid");serializer.startTag(null, "agenterid");serializer.text(ConstantValue.AGENTERID);serializer.endTag(null, "agenterid");serializer.endTag(null, "header");serializer.startTag(null, "body");serializer.endTag(null, "body");serializer.endTag(null, "message");serializer.endDocument();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}// 存在问题：// 项目组形势开发：5人，100请求// 无法预估// ①开发、维护成本高——代码冗余，极易出错// ②交接代码：开发、沟通成本// ③生成了五个封装协议的版本代码// ④协议变更了// 预估 :// 学习协议：5*0.5天// 学习协议结果的交流：5*0.5天// 风险管理——规避风险、时间影响最小化// 单独抽一人学习协议，抽取出一个协议封装的版本（公共）// 协议 不同之处需要交由其他开发人员处理}/*public void testUserLogin() {// UserEngineImpl impl=new UserEngineImpl();// UserEngineImpl1// User user=new User();// user.setUsername("13200000000");// user.setPassword("0000000");// Message login = impl.login(user);// Log.i(TAG, login.getBody().getOelement().getErrorcode());UserEngine engine = BeanFactory.getImpl(UserEngine.class);User user = new User();user.setUsername("13200000000");user.setPassword("0000000");Message login = engine.login(user);Log.i(TAG, login.getBody().getOelement().getErrorcode());}*/}

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