Java实现Web的ashx对接ORM

本文主要是介绍Java实现Web的ashx对接ORM，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

之前的介绍已经实现了ORM的主体和Web的调用结构主题，那么这次把Web和LIS.Core的容器和ORM做对接，通过ashx实现的业务类测试调用ORM查询数据。

首先改造容器让传入根地址

package LIS.Core.Context;import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;
import java.lang.reflect.Type;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.List;
import java.util.HashMap;
import java.util.*;
import java.nio.file.Path;
import java.nio.file.Paths;//一个迷你版容器，供ORM等控制反转使用
public class ObjectContainer {///用来存类型private static List<Class> classList=new ArrayList<Class>();///存类的查找关系private static HashMap<String, Integer> classIndexMap = new HashMap<String, Integer>();/// <summary>/// 按类型返回强类型的对象,一般用接口获得实现类/// </summary>/// <typeparam name="T">对象类型</typeparam>/// <returns>返回的对象</returns>public static <T> T GetObject(){Type type = ObjectContainer.class.getClass().getGenericSuperclass();Class c=type.getClass();Class<?> parent=c.getSuperclass();String cName=c.getName();if(classIndexMap.containsKey(cName)){//创建对象Object o = GetObject(cName);return (T)o;}if(parent!=null){String parentName=parent.getName();if(classIndexMap.containsKey(parentName)){//创建对象Object o = GetObject(parentName);return (T)o;}}Class<?> interfaceArr[]=c.getInterfaces();if(interfaceArr!=null&&interfaceArr.length>0){for(int j=0;j<interfaceArr.length;j++){String interfaceName=interfaceArr[j].getName();if(classIndexMap.containsKey(interfaceName)){//创建对象Object o = GetObject(interfaceName);return (T)o;}}}return null;}/// <summary>/// 按名称返回强类型的对象/// </summary>/// <typeparam name="T">对象类型</typeparam>/// <param name="name">对象名称</param>/// <returns>返回的对象</returns>public static <T> T GetTypeObject(String name){Object o=GetObject(name);return (T)o;}/// <summary>/// 按名称返回对象/// </summary>/// <param name="name">对象名称</param>/// <returns>返回对象</returns>public static Object GetObject(String name){if(classIndexMap.containsKey(name)){try {int index=classIndexMap.get(name);Class c=classList.get(index);//创建对象Object o = c.newInstance();return o;}catch (Exception ex){ex.printStackTrace();}}return null;}/// <summary>/// 用类型全名和程序集全名获得类型/// </summary>/// <param name="typeName">类型全名</param>/// <param name="assemblyName">程序集名</param>/// <returns></returns>private static Class GetType(String typeName, String assemblyName,String bashePath){try {if(bashePath==""){//得到根路径Class<?> clazz = ObjectContainer.class;ClassLoader classLoader = clazz.getClassLoader();URL resourceURL1 = classLoader.getResource("");bashePath = resourceURL1.getFile();}//组装成jar包路径String jarPath=Paths.get(bashePath,assemblyName+".jar").toString();File file = new File(jarPath);if (!file.exists()) {throw new Exception("未能找到"+jarPath+"的文件");}//反射得到类型//自己生成jar包路径URL url = file.toURI().toURL();URL[] urls = new URL[]{url};//加载程序集URLClassLoader loader = new URLClassLoader(urls,ObjectContainer.class.getClassLoader());//加载类Class c = loader.loadClass(typeName);if(c!=null){return  c;}else{throw new Exception("未能构建类型"+typeName);}}catch (Exception ex){ex.printStackTrace();}return  null;}/// <summary>/// 从根目录的ObjConfig初始化IOC容器，还是按Spring.Net的配置格式/// </summary>public static void InitIoc(String basePath) {try {String IocPath ="";if(basePath!=""){IocPath=Paths.get(basePath,"Conf","ObjConfig.xml").toString();}else{//得到根路径Class<?> clazz = ObjectContainer.class;ClassLoader classLoader = clazz.getClassLoader();URL resourceURL = classLoader.getResource(Paths.get("Conf","ObjConfig.xml").toString());IocPath = resourceURL.getFile();}//判断配置是否存在File file = new File(IocPath);if (!file.exists()) {System.out.println(IocPath+"文件不存在,请确认!");return;}//解析xmlDocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = factory.newDocumentBuilder();Document document = builder.parse(file);// 获得根节点Element rootElement = document.getDocumentElement();// 获得根节点下的所有子节点NodeList students = rootElement.getChildNodes();for (int i = 0; i < students.getLength(); i++) {// 由于节点多种类型，而一般我们需要处理的是元素节点Node childNode = students.item(i);// 元素节点就是非空的子节点，也就是还有孩子的子节点if (childNode.getNodeType() == Node.ELEMENT_NODE) {Element childElement = (Element) childNode;//不是对象配置元素就忽略if(childElement.getNodeName()!= "object"){continue;}//解析类型配置String type=childElement.getAttribute("type");//是否单例String singleton=childElement.getAttribute("singleton");//取对象idString id=childElement.getAttribute("id");//分割类全面和包名String [] arr=type.split(",");//反射得到类型Class c=GetType(arr[0],arr[1],basePath);//添加到类型列表classList.add(c);//存储索引int index=classList.size()-1;Class<?> parent=c.getSuperclass();//有id就存id映射if(id!=null&&id!=""){if(classIndexMap.containsKey(id)){throw new Exception("已经包含了id为:"+id+"的类型");}classIndexMap.put(id,index);}//有父类就存父类映射if(parent!=null){String parentName=parent.getName();if(!classIndexMap.containsKey(parentName)){classIndexMap.put(parentName,index);}}//得到所有实现的接口Class<?> interfaceArr[]=c.getInterfaces();//循环存接口映射if(interfaceArr!=null&&interfaceArr.length>0){for(int j=0;j<interfaceArr.length;j++){String interfaceName=interfaceArr[j].getName();if(!classIndexMap.containsKey(interfaceName)) {classIndexMap.put(interfaceName, index);}}}}}}catch (Exception ex) {ex.printStackTrace();}}
}

然后改造Web调用主体，传入地址初始化容器，通过jar包反射调用ashx类

import appcode.IBaseHttpHandler;import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.concurrent.ConcurrentHashMap;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Path;
import java.nio.file.Paths;import java.util.*;@javax.servlet.annotation.WebServlet(name = "MianMiddleware")
public class MainMiddleware extends javax.servlet.http.HttpServlet {/// <summary>/// 缓存路径和类型，允许多线程读一个线程写/// </summary>private static ConcurrentHashMap<String, Class> hsType = new ConcurrentHashMap<>();///执行post请求@Overrideprotected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//得到网站根路径String basePath = getServletContext().getRealPath("/");//尝试执行初始化主逻辑MainInit.TryInit(basePath);response.setContentType("text/html");request.setCharacterEncoding("UTF-8");response.setCharacterEncoding("UTF-8");String url=request.getRequestURI();//解析得到类名String className = url.split("\\.")[0];PrintWriter writer = response.getWriter();//反射得到类型Object objDeal = GetObjectByConfString(className,writer,basePath);//转换处理接口if(objDeal!=null){//转换成接口appcode.IBaseHttpHandler baseDeal=(appcode.IBaseHttpHandler)objDeal;baseDeal.ProcessRequest(request,response);}else{Write(writer,"为找到名称为:"+className+"的处理类");}}/// <summary>/// 通过配置得当对象/// </summary>/// <param name="confStr">配置UI/login/ashx/AshDemo</param>/// <returns></returns>public static Object GetObjectByConfString(String confStr,PrintWriter writer,String basePath) {try {//取第一部分if (confStr.charAt(0) == '/') {confStr = confStr.substring(1);}System.out.println("confStr:"+confStr);if (!hsType.containsKey(confStr)) {String [] nameArr=confStr.split("/");String classFullName = "";//类代码全路径String classCodePath = basePath;for (int i = 1; i < nameArr.length; i++){//类代码文件全名classCodePath = Paths.get(classCodePath, nameArr[i]).toString();//类带命名空间的全名if(classFullName!=""){classFullName += "." + nameArr[i];}else{classFullName = nameArr[i];}}//类代码地址，后面实现用脚本编译用classCodePath = classCodePath + ".java";//编译的jar名字String clsJarPath = Paths.get(basePath, "BinAshx", classFullName + ".jar").toString();System.out.println("加载jar包:"+clsJarPath);//自己生成jar包路径URL url = new File(clsJarPath).toURI().toURL();URL[] urls = new URL[]{url};//加载程序集，这里很重要，一定要指定父加载器，否则加载的类和父加载器的类不认为是一个类URLClassLoader loader = new URLClassLoader(urls, MainMiddleware.class.getClassLoader());ClassLoader  loader1=Thread.currentThread().getContextClassLoader();//加载类Class c = loader.loadClass(classFullName);//先写死，后面执行编译和从jar包反射hsType.put(confStr, c);}Class c = hsType.get(confStr);//创建对象Object o = c.newInstance();return o;}catch (Exception ex) {ex.printStackTrace();}return null;}//get直接走post的逻辑@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request,response);}///输出数据到前台private static void Write(PrintWriter writer,String str){writer.println(str);writer.flush();writer.close();}}

然后实现两个测试的ashx

package test.ashx;
import appcode.BaseHttpHandlerNoSession;
import appcode.IBaseHttpHandler;
import LIS.Model.Entity.*;
import LIS.DAL.ORM.EntityManager.EntityManagerImpl;
import java.util.List;
import java.util.HashMap;
import java.util.*;
import LIS.Core.Dto.HashParam;
import com.alibaba.fastjson.*;
//查询数据测试
public class ashGetTableData  extends BaseHttpHandlerNoSession implements IBaseHttpHandler  {//查询工作组public String QryBTWorkGroup(){BTWorkGroup species = new BTWorkGroup();LIS.DAL.ORM.EntityManager.EntityManagerImpl entry = new EntityManagerImpl();HashParam hash = new HashParam();List<BTWorkGroup> list = entry.FindAll(species, hash,"",0,0);Object json=JSONObject.toJSON(list);return json.toString();}//查询工作小组public String QryBTWorkGroupMachine(){BTWorkGroupMachine loc = new BTWorkGroupMachine();LIS.DAL.ORM.EntityManager.EntityManagerImpl entry = new EntityManagerImpl();HashParam hash = new HashParam();List<BTWorkGroupMachine> list = entry.FindAll(loc, hash,"",0,0);Object json=JSONObject.toJSON(list);return json.toString();}
}

package AshDemo;
import appcode.BaseHttpHandlerNoSession;
import appcode.IBaseHttpHandler;
import LIS.Model.Entity.*;
import LIS.DAL.ORM.EntityManager.EntityManagerImpl;
import java.util.List;
import java.util.HashMap;
import java.util.*;
import LIS.Core.Dto.HashParam;
import com.alibaba.fastjson.*;public class ashDemo  extends BaseHttpHandlerNoSession implements IBaseHttpHandler  {public ashDemo(){super();}///测试public String Test(){return "这是ashDemo返回的文本";}///测试public String ZLZ(){return "这是名称为ZLZ的方法返回的文本";}//查询性别public String QrySysFromSpecies(){BTSpecies species = new BTSpecies();LIS.DAL.ORM.EntityManager.EntityManagerImpl entry = new EntityManagerImpl();HashParam hash = new HashParam();List<BTSpecies> list = entry.FindAll(species, hash,"",0,0);Object json=JSONObject.toJSON(list);return json.toString();}//查询科室public String QryLocation(){BTLocation loc = new BTLocation();LIS.DAL.ORM.EntityManager.EntityManagerImpl entry = new EntityManagerImpl();HashParam hash = new HashParam();List<BTLocation> list = entry.FindAll(loc, hash,"",0,0);Object json=JSONObject.toJSON(list);return json.toString();}}

然后运行测试

至此Web调用ashx访问数据库打通了，ORM也在给力小伙伴的努力下快速填充，给力给力

测试ORM代码

package com.company;
//import org.apache.commons.configuration.ConfigurationException;
//import org.apache.commons.configuration.PropertiesConfiguration;
import LIS.Core.Dto.HashParam;
import LIS.Core.Dto.OutParam;
import LIS.Core.Dto.OutStatus;
import LIS.DAL.ORM.EntityManager.EntityManagerImpl;
import LIS.Model.Entity.BTSpecies;
import LIS.Model.Entity.SYSForm;
import LIS.Model.Entity.SYSUser;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;
import java.net.URL;
import java.sql.SQLException;
import java.util.List;
import java.util.HashMap;
import java.util.*;
import com.alibaba.fastjson.*;public class Main {public static void main(String[] args) {//用容器的配置xml初始化容器LIS.Core.Context.ObjectContainer.InitIoc();//ORM通过容器取数据库驱动工厂LIS.DAL.ORM.EntityManager.EntityManagerImpl orm=new LIS.DAL.ORM.EntityManager.EntityManagerImpl();//执行查询测试orm.DBSelectTest();//测试通过实体得到SQL语句orm.InsertSqlTest(new SYSForm());orm.InsertSqlTest(new SYSUser());//调用ORM的FindAll测试HashParam hs = new HashParam();hs.Add("Code","QC");List<SYSForm> formList=orm.FindAll(new SYSForm(),hs,"RowID desc",-1,-1);Object json=JSONObject.toJSON(formList);System.out.println("查询的LIST数据:"+json.toString());System.out.println("=========================");//SaveTest();//UpdateTest();BatchDB();QryTest();}public static void QryTest(){BTSpecies species = new BTSpecies();LIS.DAL.ORM.EntityManager.EntityManagerImpl entry = new EntityManagerImpl();HashParam hash = new HashParam();List<BTSpecies> list = entry.FindAll(species, hash,"",0,0);for (BTSpecies obj : list){String ss = obj.RowID + "\t" + obj.Code + "\t" + obj.CName + "\t" + obj.Pregnant;System.out.println(ss);}}public static void UpdateTest(){BTSpecies species = new BTSpecies();species.CName = "测试性别修改";species.Code = "D";species.STDCode = "CS";species.Pregnant = false;species.RowID = 23;EntityManagerImpl entry = null;try{entry = new EntityManagerImpl();if (entry.DBConnection == null) {System.out.println("数据库未连接");return;}boolean trans = entry.DBConnection.BeginTransaction();if (trans){OutParam outParam = new OutParam();int row = entry.Update(species,null,outParam,null,null,null);if (outParam.Code == OutStatus.ERROR){System.out.println(outParam.Message);entry.DBConnection.RollTransaction();return;}boolean end = entry.DBConnection.CommitTransaction();if (!end){System.out.println("提交事务失败！");}System.out.println("更新成功数据返回：" + row);}else{System.out.println("开启事务失败！");}}catch (Exception ex){if (entry != null){entry.DBConnection.RollTransaction();}ex.printStackTrace();}}public static void SaveTest(){BTSpecies species = new BTSpecies();species.CName = "测试性别";species.Code = "E";species.STDCode = "CS";species.Pregnant = true;EntityManagerImpl entry = null;try{entry = new EntityManagerImpl();if (entry.DBConnection == null) throw new SQLException("数据库未连接");boolean trans = entry.DBConnection.BeginTransaction();if (trans){int row = entry.Save(species);boolean end = entry.DBConnection.CommitTransaction();if (!end){System.out.println("提交事务失败！");}System.out.println("保存数据返回：" + row);}else{System.out.println("开启事务失败！");}}catch (SQLException ex){if (entry != null){entry.DBConnection.RollTransaction();}ex.printStackTrace();}}public static void BatchDB(){BTSpecies species = new BTSpecies();species.CName = "测试性别2121";species.Code = "E3";species.STDCode = "CS";species.Pregnant = false;species.RowID = 22;EntityManagerImpl entry = null;try{entry = new EntityManagerImpl();if (entry.DBConnection == null) throw new SQLException("数据库未连接");boolean trans = entry.DBConnection.BeginTransaction();if (trans){OutParam outRemove = new OutParam();int row = entry.Remove(species, null, outRemove, null, null);if (outRemove.Code == OutStatus.ERROR){throw new SQLException("删除数据失败");}System.out.println("删除数据返回：" + row);BTSpecies species1 = new BTSpecies();species1.RowID = 24;species1.Pregnant = true;species1.CName = "批量修改的名称--Update";species1.HISCode = "BHIS";List<String> cols = new ArrayList<String>();cols.add("CName");cols.add("HISCode");cols.add("Pregnant");List<String> joins = new ArrayList<String>();joins.add("OR");joins.add("OR");HashParam param = new HashParam();param.Add("Code","C");param.Add("Code","B");param.Add("Code","E");OutParam out = new OutParam();row = entry.Update(species1, param, out, cols, joins, null);if (out.Code == OutStatus.ERROR){throw new SQLException("更新数据失败！" + out.Message);}boolean end = entry.DBConnection.CommitTransaction();if (!end){System.out.println("提交事务失败！");}System.out.println("更新数据返回：" + row);entry.DBConnection.Close();}else{System.out.println("开启事务失败！");}}catch (SQLException ex){if (entry != null){entry.DBConnection.RollTransaction();}ex.printStackTrace();}finally {if (entry != null && entry.DBConnection != null){entry.DBConnection.Close();}}}
}

下一个阶段全面实现ORM的api和实现ashx业务java脚本自动编译jar包到BinAshx目录供Web调用

这篇关于Java实现Web的ashx对接ORM的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---