MongoDB Learning (4) Integrate springdata with MongoDB

1, configuration file mongo-config.xml

<? XML version = "1.0" encoding = "UTF-8"?> <Beans xmlns = "http://www.springframework.org/schema/beans" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns: context = "http://www.springframework.org/schema/context" xmlns: Mongo = "http://www.springframework.org/schema/data/mongo" xsi: schemalocation = "http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org /Schema/data/parse http: // www.springframework.org/schema/data/#/spring-developer-1.1.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd "> <! -- Define the Mongo object and related IP addresses and ports --> <Mongo: Mongo host = "localhost" Port = "27017"/> <! -- Mongo factory, which is used to obtain the Mongo instance --> <Mongo: DB-factory dbname = "mongodemo"/> <bean id = "mappingcontext" class = "org. springframework. data. mongoDB. core. mapping. mongomappingcontext "> </bean> <bean id =" defaultmongopolictypemapper "class =" org. springframework. data. mongoDB. core. convert. defaultpolictypemapper "> <constructor-Arg name =" typekey "value =" null "/> </bean> <! -- The mongomappingconverter class serves as the object ing function. The Java class is converted to a MongoDB document through annotations. --> <Bean id = "mappingw.converter" class = "org. springframework. data. mongoDB. core. convert. mappingmongoconverter "> <constructor-Arg name =" mongodbfactory "ref =" mongodbfactory "/> <constructor-Arg name =" mappingcontext "ref =" mappingcontext "/> <property name =" typemapper "ref =" defaultmongotypemapper "/> </bean> <! -- MongoDB's main operation object. All operations for adding, deleting, modifying, and querying MongoDB are completed through it --> <bean id = "mongotemplate" class = "org. springframework. data. mongoDB. core. extends template "> <constructor-Arg name =" mongodbfactory "ref =" mongodbfactory "/> <constructor-Arg name =" mongoconverter "ref =" mappingmongoconverter "/> </bean> </beans>

2. entity Object User. Java

View code

Public class user {private string uname; private string upwd; public user (string uname, string upwd) {This. uname = uname; this. upwd = upwd;} Public String getuname () {return uname;} public void setuname (string uname) {This. uname = uname;} Public String getupwd () {return upwd;} public void setupwd (string upwd) {This. upwd = upwd;} Public String tostring () {return "[user information: uname:" + uname + "\ tupwd:" + upwd + "]";}

3. Tool class mongoutil. Java

Public class extends util {static applicationcontext CTX = new genericxmlapplicationcontext ("mongo-config.xml"); Private Static extends operations = NULL;/*** get the extends operations object (responsible for crud work) * @ return */public static operation operations getoperation operation () {If (Operation operations = NULL) {operation operations = (Operation operations) CTX. getbean ("your template");} return your operations;}/*** variable length parameter, construct the query condition * @ Param criterias * @ return */public static query setquery (criteria... criterias) {query = new query (); For (INT I = 0; I <criterias. length; I ++) {query. addcriteria (criterias [I]);} return NULL ;}}

4. crudtest. Java

Package COM. archie. test; import Java. util. list; import Org. springframework. data. mongoDB. core. repeated operations; import Org. springframework. data. mongoDB. core. query. criteria; import Org. springframework. data. mongoDB. core. query. query; import Org. springframework. data. mongoDB. core. query. update; import COM. archie. util. mongoutil; import COM. archie. VO. user;/*** add, delete, query, modify, and test * @ author archie2010 ** since 04:43:39 */public class crudtest {public static void main (string [] ARGs) {operations operation = Specified util. getmongooperation ();
User user = new user ("Archie", "123"); // added operation. save (user, "users"); criteria criterianame = criteria. where ("uname "). is ("Tom"); criteria criteriapwd = criteria. where ("upwd "). is ("123"); query = new query (); query. addcriteria (criterianame); query. addcriteria (criteriapwd); User userlogin = operation. findone (query, user. class, "users"); system. out. println (userlogin); // query user saveduser = operation. findone (new query (criteria. where ("uname "). is ("Archie"), user. class, "users"); system. out. println ("saveduser:" + saveduser); // update operation. updatemulti (new query (criteria. where ("uname "). is ("Archie"), update. update ("upwd", "1111111111"), "users"); // query user updateduser = operation. findone (new query (criteria. where ("uname "). is ("Archie"), user. class, "users"); system. out. println ("updateduser:" + updateduser); // Delete the specified operation. remove (new query (criteria. where ("uname "). is ("Archie"), "users"); // query the list of sets <user> listuser = operation. findall (user. class, "users"); system. out. println ("number of user =" + listuser. size ());}}

Run: