如何将bean注入@Controller类

Question

我对Spring(使用3.0)有些新意,所以我希望有一个简单的答案.如果我有一个带有@Controller和的注释控制器,@RequestMapping并且我想通过依赖注入设置属性,我该如何去做呢？控制器类不必出现在Spring配置文件中,因为它会因@Controller注释而自动拾取.

示例控制器类:

package gov.wi.dnr.wh.web.spring;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class RehabHomeController {
  private String xxx;

  @RequestMapping(value="/rehab/home", method = RequestMethod.GET)
  public String get() {
    return "whdb.rehabhome";
  }

  public String getXxx() {
    return xxx;
  }

  public void setXxx(String xxx) {
    this.xxx = xxx;
  }
}

弹簧配置:

<?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:mvc="http://www.springframework.org/schema/mvc"
        xmlns:context="http://www.springframework.org/schema/context"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
                            http://www.springframework.org/schema/context 
                      http://www.springframework.org/schema/context/spring-context-3.0.xsd">

  <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <property name="suffix" value=".jsp"/>
  </bean>

  <context:component-scan base-package="gov.wi.dnr.wh.web.spring"/>
  <mvc:annotation-driven />

</beans>

这是按原样工作,但我想注入"xxx"属性.我该怎么做呢？

Answer 1

@Autowired
private YourService yourServiceBean;

(你也可以用@Inject)

当然,YourService必须声明为bean - 无论是在文本中applicationContext.xml还是通过注释(@Service例如)

如果要注入字符串属性,可以使用@Value注释:

@Value("${propName}")
private String str;

(为此你需要一个PropertyPlaceholderConfigurer)