Spring Injection-map

Injecting attributes into a map in the spring framework

object creation for 1MAP mapping

 Packagecom;/*** Map collection Usage test in spring*/ Public classUser {Private intID; PrivateString name; PrivateString pwd;  Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString getpwd () {returnpwd; }     Public voidsetpwd (String pwd) { This. PWD =pwd; } @Override PublicString toString () {return"user[id=" + ID + ", name=" + name + ", pwd=" + pwd + "]"; }     PublicUser (intID, string name, string pwd) {        Super();  This. ID =ID;  This. Name =name;  This. PWD =pwd; }     PublicUser () {Super(); //TODO auto-generated Constructor stub    }}

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Users of 2.Map

 Packagecom;ImportJava.util.Map;/*** Map Collection Use test in spring framework*/ Public classMapdemo {Private intID; PrivateString name; PrivateString pwd; PrivateMap<string,user>user;  Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString getpwd () {returnpwd; }     Public voidsetpwd (String pwd) { This. PWD =pwd; }     PublicMap<string, user>GetUser () {returnuser; }     Public voidSetUser (map<string, user>user) {         This. user =user; } @Override PublicString toString () {return"Mapdemo [id=" + ID + ", name=" + name + ", pwd=" + pwd + ", user=" + user + "]"; }     PublicMapdemo () {Super(); //TODO auto-generated Constructor stub    }     PublicMapdemo (intID, string name, string pwd, map<string, user>user) {        Super();  This. ID =ID;  This. Name =name;  This. PWD =pwd;  This. user =user; }}

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3. Configuration files

<?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:p= "http://www.springframework.org/schema/p"Xmlns:util= "Http://www.springframework.org/schema/util"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http ://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http ://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd "> < Context:property-placeholder location= "classpath:jdbc.properties"/> <bean id= "user1"class= "com. User "> <property name=" id "value=" 1 "></property> <property name=" name "value=" Name1 "&GT;&L t;/property> <property name= "pwd" value= "pwd1" ></property> </bean> <bean id= "User2"class= "com. User "> <property name=" id "value=" 2 "></property> <property name=" name "value=" Name2 "&GT;&L t;/property> <property name= "pwd" value= "pwd2" ></property> </bean> <bean id= "User3"class= "com. User "> <property name=" id "value=" 3 "></property> <property name=" name "value=" Name3 "&GT;&L t;/property> <property name= "pwd" value= "PWD3" ></property> </bean> < injection--&G!--Map Collection    T <util:map id= "User" > <entry key= "1" value-ref= "user1"/> <entry key= "2" value-ref= "User2"/&gt        ; <entry key= "2" value-ref= "User3"/> </util:map> <bean id= "Mapdemo"class= "com. Mapdemo "> <property name=" id "value=" 001 "/> <property name=" name "value=" Tom "/> < Property name= "pwd" value= "123456"/> <!--to relate the user class to the Demo2 class--<property name= "user" ref= "user "/> </bean></beans>

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4. Test code

 Packagetest;Importcom. Mapdemo;ImportOrg.springframework.context.support.ClassPathXmlApplicationContext;/*** Created by Administrator on 2016/12/4.*/ Public classMapdemotest { Public Static voidMain (string[] args) {Classpathxmlapplicationcontext cx=NewClasspathxmlapplicationcontext ("Demo1.xml"); Mapdemo Mapdemo= (Mapdemo) cx.getbean ("Mapdemo");    System.out.println (Mapdemo); }}

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Note: There was a problem at the time of the test. Because there is a class name that modifies the user. Therefore, the property name and the method name are also replaced synchronously in the Mapdemo, but it fails when injected. Prompts the user for a question.

FIX: Delete set, get, regenerate.

Spring Injection-map