webutil.java

SpringSide开源代码

package org.springside.examples.extremeweb.util;

import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;

import org.springframework.context.ApplicationContext;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.context.support.WebApplicationContextUtils;

/**
 * 封装jsp常用操作.
 * 
 * @author calvin
 */
public class WebUtil {

	private WebUtil() {
	}

	/**
	 * 从Spring的ApplicationContext中获取bean.
	 * 
	 * 其中Spring的ApplicationContext通过web.xml中的ContextLoaderListener载入到ServletContext中.
	 */
	public static Object getBean(ServletContext application, String beanName) {
		ApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(application);
		return context.getBean(beanName);
	}

	/**
	 * 借助Spring的ServletRequestDataBinder 通过反射将request中的参数绑定到目标对象.
	 */
	public static void bind(ServletRequest request, Object target) {
		ServletRequestDataBinder binder = new ServletRequestDataBinder(target);
		binder.bind(request);
	}
}