跟我學Hibernate框架技術(shù)——在容器外實現(xiàn)Hibernate的包含關(guān)系及應用實例（MySQL——第2部分）

1、楊教授工作室 精心創(chuàng)作的優(yōu)秀程序員 職業(yè)提升必讀系列資料目 錄1.1在容器外實現(xiàn)hibernate的包含關(guān)系及應用實例（mysql第2部分）21.1.1應用單元測試用例測試本示例的應用效果21.1.2體驗set集合映射技術(shù)及應用實例51.1.3體驗的應用技術(shù)及示例181.1 在容器外實現(xiàn)hibernate的包含關(guān)系及應用實例（mysql第2部分）1.1.1 應用單元測試用例測試本示例的應用效果1、在項目中添加一個測試用例類testcontainhibernatedaoimple包名稱為com.px1987.hexample.dao.test，被測試的類為containhibernatedaoi

2、mple2、編程該測試用例類package com.px1987.hexample.dao.test;import java.io.unsupportedencodingexception;import junit.framework.assert;import org.hibernate.hibernateexception;import org.junit.afterclass;import org.junit.beforeclass;import org.junit.test;import com.px1987.sshwebcrm.dao.imple.containhibernateda

3、oimple;import er.containhibernatedaointerface;public class testcontainhibernatedaoimple static containhibernatedaointerface containhibernatedaoimplebean=null;beforeclasspublic static void setupbeforeclass() throws exception containhibernatedaoimplebean=new containhibernat

4、edaoimple();afterclasspublic static void teardownafterclass() throws exception containhibernatedaoimplebean=null;testpublic void testdoinsertuserinfodatatodb()throws hibernateexception, unsupportedencodingexception boolean actualreturn=containhibernatedaoimplebean.doinsertuserinfodatatodb();assert.a

5、sserttrue(actualreturn);testpublic void testdoselectuserinfodatafromdb() string selecthql=from com.px1987.sshwebcrm.dao.pobject.userinfomailpo;boolean actualreturn=containhibernatedaoimplebean.doselectuserinfodatafromdb(selecthql);assert.asserttrue(actualreturn);3、執(zhí)行本測試用例在數(shù)據(jù)庫表中也增加了一條記錄在控制臺中的輸出1.1.2

6、體驗set集合映射技術(shù)及應用實例1、userinfo_setpo、包名稱為com.px1987.sshwebcrm.dao.pobjectprivate string username;private string id;private set addrs = new hashset();提供一個幫助方法 public void addaddress(string addr) /該方法為“幫助方法” addrs.add(addr); 和 overridepublic int hashcode() final int prime = 31;int result = 1;result = prim

7、e * result + (addrs = null) ? 0 : addrs.hashcode();result = prime * result + (id = null) ? 0 : id.hashcode();result = prime * result+ (username = null) ? 0 : username.hashcode();return result;overridepublic boolean equals(object obj) if (this = obj)return true;if (obj = null)return false;if (getclas

8、s() != obj.getclass()return false;final userinfo_set other = (userinfo_set) obj;if (addrs = null) if (other.addrs != null)return false; else if (!addrs.equals(other.addrs)return false;if (id = null) if (other.id != null)return false; else if (!id.equals(other.id)return false;if (username = null) if

9、(other.username != null)return false; else if (!username.equals(other.username)return false;return true;最后為下面的結(jié)果代碼package com.px1987.sshwebcrm.dao.pobject;import java.util.hashset;import java.util.set;public class userinfo_setpo private string username;overridepublic int hashcode() final int prime =

10、 31;int result = 1;result = prime * result + (addrs = null) ? 0 : addrs.hashcode();result = prime * result + (id = null) ? 0 : id.hashcode();result = prime * result+ (username = null) ? 0 : username.hashcode();return result;overridepublic boolean equals(object obj) if (this = obj)return true;if (obj

11、 = null)return false;if (getclass() != obj.getclass()return false;userinfo_setpo other = (userinfo_setpo) obj;if (addrs = null) if (other.addrs != null)return false; else if (!addrs.equals(other.addrs)return false;if (id = null) if (other.id != null)return false; else if (!id.equals(other.id)return

12、false;if (username = null) if (other.username != null)return false; else if (!username.equals(other.username)return false;return true;public string getusername() return username;public void setusername(string username) this.username = username;public string getid() return id;public void setid(string

13、 id) this.id = id;public set getaddrs() return addrs;public void setaddrs(set addrs) this.addrs = addrs;private string id;private set addrs = new hashset(); public void addaddress(string addr) /該方法為“幫助方法” addrs.add(addr); public userinfo_setpo() 2、addresspo類、包名稱為com.px1987.sshwebcrm.dao.pobjectpriva

14、te string addresstext;package com.px1987.sshwebcrm.dao.pobject;public class addresspo overridepublic int hashcode() final int prime = 31;int result = 1;result = prime * result+ (addresstext = null) ? 0 : addresstext.hashcode();return result;overridepublic boolean equals(object obj) if (this = obj)re

15、turn true;if (obj = null)return false;if (getclass() != obj.getclass()return false;addresspo other = (addresspo) obj;if (addresstext = null) if (other.addresstext != null)return false; else if (!addresstext.equals(other.addresstext)return false;return true;private string addresstext;public string ge

16、taddresstext() return addresstext;public void setaddresstext(string addresstext) this.addresstext = addresstext;public addresspo() 3、對應的數(shù)據(jù)庫表 userinfo_set和addressinfo_set數(shù)據(jù)庫表結(jié)構(gòu)如下數(shù)據(jù)庫表之間必須滿足主外鍵的關(guān)系要求。4、建立它們之間的映射關(guān)系 ？（1）在項目中再添加userinfopo_set.hbm.xml 4、hibernate.cfg.xml文件的內(nèi)容5、編程dao方法（1）修改containhibernateda

17、ointerface接口package er;import org.hibernate.hibernateexception;public interface containhibernatedaointerface public boolean doinsertuserinfodatatodb() throws hibernateexception,java.io.unsupportedencodingexception; public boolean doselectuserinfodatafromdb(string selecthq

18、l) throws hibernateexception; public boolean doinsertuserandmailtodb() throws hibernateexception; public boolean doselectuserandmaildatafromdb(string selecthql) throws hibernateexception;（2）修改containhibernatedaoimple類添加實現(xiàn)方法 public boolean doinsertuserandmailtodb() throws hibernateexceptionsession se

19、ssion=null;transaction tx=null; try session = hibernateutil.currentsession(); tx = session.begintransaction(); userinfo_setpo oneuser = new userinfo_setpo(); oneuser.setusername(yang); oneuser.addaddress(); oneuser.addaddress(); oneuser.addaddress(); sess

20、ion.save(oneuser); mit(); catch (hibernateexception he) if (tx != null) tx.rollback(); log.error(在doinsertuserandmailtodb方法中出現(xiàn)了hibernateexception錯誤, he); throw he; finally hibernateutil.closesession(); return true; public boolean doselectuserandmaildatafromdb(string selecthql) throws hibernate

21、exceptionsession session=null;transaction tx=null;trysession = hibernateutil.currentsession();tx= session.begintransaction();list alluserinfo_set = session.createquery(selecthql).list();for (listiterator iterator = alluserinfo_set.listiterator(); iterator.hasnext(); ) userinfo_setpo oneuserinfo_set

22、= (userinfo_setpo) iterator.next(); system.out.println(id=+oneuserinfo_set.getid() + tusername= + oneuserinfo_set.getusername(); set alladdreess=oneuserinfo_set.getaddrs();iterator oneaddress=alladdreess.iterator();while(oneaddress.hasnext()string useraddress=(string)oneaddress.next();system.out.pri

23、ntln(address info：+useraddress); mit(); catch(hibernateexception he) log.error(在doselectuserandmaildatafromdb方法中出現(xiàn)了hibernateexception錯誤, he); throw he; finally hibernateutil.closesession(); return true;6、修改測試用例testpublic void testdoinsertuserandmailtodb() throws exceptionboolean actualreturn=c

24、ontainhibernatedaoimplebean.doinsertuserandmailtodb();assert.asserttrue(actualreturn);testpublic void testdoselectuserandmaildatafromdb() throws exceptionstring selecthql=from com.px1987.sshwebcrm.dao.pobject.userinfo_setpo;boolean actualreturn=containhibernatedaoimplebean.doselectuserandmaildatafro

25、mdb(selecthql);assert.asserttrue(actualreturn);對前面的各個測試方法可以采用ignore臨時屏蔽掉。7、執(zhí)行測試用例同時在控制臺中產(chǎn)生的輸出同時在用戶的信息數(shù)據(jù)庫表中將出現(xiàn)下面的數(shù)據(jù)另外，在用戶的地址信息數(shù)據(jù)庫表中將出現(xiàn)下面的數(shù)據(jù)1.1.3 體驗的應用技術(shù)及示例1、修改前面的userinfo_setpo類，以增加一個set mailaddrs成員定義private set mailaddrs = new hashset(); public set getmailaddrs() return mailaddrs; public void setmai

26、laddrs(set mailaddrs) this.mailaddrs = mailaddrs; public void addmailaddress(emailpo emailaddr) /該方法為“幫助方法” mailaddrs.add(emailaddr); 2、而emailpo類可以采用前面已經(jīng)生成的emailpo.java它代表集合中的元素類型-此時，不再是string類型，而是我們自己定義的類的類型。3、再新建一個數(shù)據(jù)庫表emailinfo當然，原來的數(shù)據(jù)庫表不變。因此，emailpo類中的代碼實現(xiàn)了重用（再次被使用）。l userinfo_set表結(jié)構(gòu)為l addressinf

27、o_set表結(jié)構(gòu)為4、修改該userinfo_set類的userinfo_set.hbm.xml文件以增加對mailaddrs的集合的定義 5、修改dao組件（1）doinsertuserandtwomailtodb方法的代碼public boolean doinsertuserandtwomailtodb() throws hibernateexceptionsession session=null;transaction tx=null; try session = hibernateutil.currentsession(); tx = session.begintransaction(

28、); userinfo_setpo oneuser = new userinfo_setpo(); oneuser.setusername(yang); oneuser.addaddress(); oneuser.addaddress(); oneuser.addaddress(); emailpo oneemail=new emailpo(); oneemail.setmailname(abc); oneemail.sethost(); emailpo twoemail=new email

29、po(); twoemail.setmailname(trainict); twoemail.sethost(); emailpo threeemail=new emailpo(); threeemail.setmailname(yangsb); threeemail.sethost(); oneuser.addmailaddress(oneemail); oneuser.addmailaddress(twoemail); oneuser.addmailaddress(threeemail); session.save(oneuser);

30、mit(); catch (hibernateexception he) if (tx != null) tx.rollback(); log.error(在doinsertuserandtwomailtodb方法中出現(xiàn)了hibernateexception錯誤, he); throw he; finally hibernateutil.closesession(); return true;（2）doselectuserandtwomaildatafromdb方法public void doselectuserandtwomaildatafromdb(string selecthql) throws hibernateexceptionsession session=null;transaction tx=null;trysession = hibernateutil.currentsession();tx= session.begintrans