springmvc 第一课

最新推荐文章于 2022-06-24 19:10:41 发布

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本文提供了一个Spring MVC 4.0的入门教程，包括导入jar包、配置Spring MVC、创建Controller和视图解析器，以及编写简单的JSP页面。详细步骤涵盖了从配置到实现的基本操作。

springmvc4.0demo入门

1、先从导入jar包开始

只要运行一个pringmvc hello world要导入如下jar包

2、jar导入好了之后建一个springmvc的配置文件 springmvc-servlet.xml内容如下

<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

<context:component-scan base-package="cn.ynbd.controller"/>
<mvc:annotation-driven />


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

3、配置文件建好之后配置web.xml文件

首先配置dispatcherServlet

<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-servlet.xml</param-value>
</init-param>

</servlet>

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

实际上也可以不通过 contextConfigLocation 来配置 SpringMVC 的配置文件, 而使用默认的.
默认的配置文件为: /WEB-INF/<servlet-name>-servlet.xml

4、接下来就到写controller了

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

@Controller
@RequestMapping("/mvc")
public class TestController {

@RequestMapping("/hello")
public String hello() throws UnsupportedEncodingException{
HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
System.err.println("hello world");
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
session.setAttribute("message1", "request测试");
return "test";
}
@RequestMapping("/hh")
public String hh() throws UnsupportedEncodingException{
HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
session.setAttribute("message", 1);
return "hh";
}

@RequestMapping("/model")
public String medels(Model model,@RequestParam(value="id",required=false,defaultValue="0") String id){
model.addAttribute("models", "model测试");
try {
id = new String(id.getBytes("ISO-8859-1"), "UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
model.addAttribute("ids", id);
System.out.println("RequestParam:"+id);
return "model";
}

}