java - Invalid property 'messageService ' of bean class [Person]- Spring Framework -

i'm having error while trying dependency injection spring framework

invalid property 'messageservice ' of bean class [person]: bean property 'messageservice ' not writable or has invalid setter method. did mean 'messageservice'?

here's class person:

public class person {     private messageservice messageservice;      public void setmessageservice(messageservice messageservice){           this.messageservice  = messageservice;     }      public messageservice getmessageservice() {           return this.messageservice;     }      public void chao(string subject, string message)     {         messageservice.sendmessage(subject,message);     }  } 

here's beans.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" xsi:schemalocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">    <bean id="email" class="email"></bean>    <bean id="person" class="person">        <property name="messageservice " ref="email"></property>    </bean> </beans> 

and main class

public class main {      public static void main(string args[]) throws exception{         applicationcontext context = new classpathxmlapplicationcontext("beans.xml");           person test = (person) context.getbean("person");         test.chao("abc","abc");     } } 

messageservice interface, class email implements messageservice can tells me i'm doing wrong? thank much

there blank @ end of name="messageservice ". please remove it.