springMVC

最新推荐文章于 2025-12-21 21:47:42 发布

转载最新推荐文章于 2025-12-21 21:47:42 发布 · 91 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/u/2610056/blog/728854

文章标签：

#java #web.xml #xhtml

1、springMVC helloWorld

1）、springMVC web.xml中的配置

这样一种配置节：context-param，它用于向 ServletContext 提供键值对，即应用程序上下文信息。我们的 listener, filter 等在初始化时会用到这些上下文中的信息，那么 context-param 配置节是不是应该写在 listener 配置节前呢？实际上 context-param 配置节可写在任意位置，因此真正的加载顺序为：context-param -> listener -> filter -> servlet

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
   <servlet>
       <servlet-name>spring</servlet-name>
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       
       
       <load-on-startup>1</load-on-startup>
   </servlet>

   <servlet-mapping>
       <servlet-name>spring</servlet-name>
       <url-pattern>/</url-pattern>
   </servlet-mapping>

</web-app>

2）spring-servlet.xml中的配置

<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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">

<context:component-scan base-package="com.wanglu.cn"/>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>

</beans>

3）HelloWorldController.java

package com.wanglu.cn;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@RequestMapping("/helloWorldController")
@Controller
public class HelloWorldController {

@RequestMapping(value="/helloWorld" ,method=RequestMethod.POST,params={"username","age!=10"},headers={"Accept-Language=zh-CN,zh;q=0.8"})
public String helloWorld1(Model model) {
model.addAttribute("message", "Hello World!");
System.out.println("helloworld");
return "helloWorld";
}
/**
* requestMapping 支持ant风格的url
* ？匹配一个字符，*匹配任意的字符，**:**匹配多层路径
* @param model
* @return
*/
@RequestMapping(value="/hello/*/helloWorld" )
public String helloWorld2(Model model) {
model.addAttribute("message", "Hello World!");
System.out.println("helloworld");
return "helloWorld";
}
/**
*占位符
* @PathVariable
*/
@RequestMapping("/helloworld/{id}")
public String helloWorld3(Model model,@PathVariable("id") Integer id) {
model.addAttribute("message", "Hello World!");
System.out.println("helloworld"+id);
return "helloWorld";
}
}

2、springMVC实现REST中的GET,POST,DELETE,PUT请求

1）web.xml

<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

2)表单

3）Controller

/**
* springMVC实现REST中的DELETE请求
*/
@RequestMapping(value="/helloWorldDelete/{id}",method=RequestMethod.DELETE)
public String helloWorld(@PathVariable("id") Integer id) {
System.out.println("DELETE:"+id);
return "helloWorld";
}

3、@requestParam的用法
@RequestMapping(value="/helloWorldDelete",method=RequestMethod.GET)
public String helloWorld1(@RequestParam(value="username") String username,
@RequestParam(value="age",required=false,defaultValue="0") int age) {
System.out.println("GET:"+username+",age："+age);
return "helloWorld";
}

4、@requestHeader

Host localhost:8080
Accept text/html,application/xhtml+xml,application/xml;q=0.9
Accept-Language fr,en-gb;q=0.7,en;q=0.3
Accept-Encoding gzip,deflate
Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive 300
@RequestMapping("/displayHeaderInfo.do")
public void displayHeaderInfo(@RequestHeader("Accept-Encoding") String encoding, @RequestHeader("Keep-Alive") long keepAlive) { }

5、/**
   * springMVC获取名字为JSESSIONID的Cookie
   */
   @RequestMapping(value = "/helloWorldDelete/{id}", method = RequestMethod.DELETE)
   public String helloWorld(@PathVariable("id") Integer id,
           @CookieValue("JSESSIONID") String sessionId) {
       System.out.println("DELETE:" + sessionId);
       return "helloWorld";
   }

6、/**
   * springmvc使用原生的api
   * @throws IOException
   */

   public String userApi(HttpServletRequest request,HttpServletResponse response,Writer out) throws IOException{
       out.write("ssss");
       return "success";
   }

7、ModelAndView向前台传值的方式

   public ModelAndView userApi(HttpServletRequest request,HttpServletResponse response,Writer out) throws IOException{
       ModelAndView modelAndView=new ModelAndView();
       modelAndView.addObject("time",new Date());
       return modelAndView;
   }

   public String userApi1(Map<String,Object> map ) throws IOException{
       map.put("time",new Date());
       return "success";
   }

8、一般而言ModelAndView中的属性作用域都是request级别，即本次请求结束，属性也随之销毁。如果想要实现多个请求共享其某个属性，需将其保存至session

@Controller

@RequestMapping("/info")

@SessionAttributes("user") //要在方法中直接注解user必须要这一步 public class InfoController { private Logger logger = LoggerFactory.getLogger(InfoController.class);

@RequestMapping("")

public ModelAndView view(@ModelAttribute User user,) { ModelAndView modelView = new ModelAndView("/info/view");

logger.info(user.toString());

return modelView; } }

转载于:https://my.oschina.net/u/2610056/blog/728854