load resource file [ioutils]

<dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-io</artifactId>
      <version>1.3.2</version>
    </dependency>

//load file from classpath(resource path)
InputStream is = getClass().getResourceAsStream("/aaa.rule.properties");
String st=IOUtils.toString(is);

    <bean id="contents2" class="org.apache.commons.io.IOUtils" factory-method="toString">
        <constructor-arg value="classpath:aaa.rule.properties" type="java.io.InputStream" />
    </bean>

#controler
    @Autowired
    private String contents2;

@RequestMapping("/index")
    public void helloWorld(ModelMap model) {
        	System.out.println(contents2);
	}