SPRINGMVC Project Complete example of spring MVC

The front is primarily background code, the integration of spring and MyBatis

The following are mainly SPRINGMVC used to handle request forwarding, Presentation layer processing

Before all done, completed the backstage, the business layer and the development of the persistence layer completed

Next up is the presentation layer.

There are a lot of MVC frameworks, here we use SPRINGMVC

First, you need a jar package.

We're a Web project now.

is also necessary, so the two packages need to be added

We need to configure Web. xml

A Web project, when started, the container here refers to Tomcat this, will first read the Web. XML configuration file inside the configuration

So he's the most fundamental configuration file.

The spring configuration needs to be set here, and the Tomcat container we use will automatically start our spring container.

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

id="WebApp_ID"

version="3.0">

 

<!-- 1,从类路径下加载spring的配置文件,classpath关键字特指类路径下加载 -->

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:applicationContext.xml</param-value>

</context-param>

<!--2,负责启动spring容器的监听器,它将引用1处的上下文参数,获得spring配置文件的地址 -->

<listener>

<listener-class>

org.springframework.web.context.ContextLoaderListener

</listener-class>

</listener>

 

</web-app>

1. First, we specify the path to the configuration file through the context parameter of the Web. xml

2. Then the Web container listener that specifies the Contextloaderlistener provided by spring

The listener starts automatically when the Web container starts, gets the profile path, reads the configuration file, and starts the spring, based on the value of the parameter at 1.

You also need to configure the servlet to intercept URL requests

<servlet>

<servlet-name>bbs</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:springmvc.xml</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

Attention:

A servlet is configured, and a configuration file is required, which

The default is the Web-inf directory, with the name [<servlet-name>]-servlet.xml

The following is the name and location of the configuration file specified.

To put it bluntly, a servlet is configured to have a control profile, or to write a file according to the location and name of the default specification.

or set a name and location on your own.

It is recommended that you customize a

We're also going to define the interception request, right?

<servlet-mapping>

<servlet-name>bbs</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

This is the name of nature is our servlet name, matching is. Do end, as the truth, you set to anything is possible

So our web. xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

id="WebApp_ID"

version="3.0">

 

<!-- 1,从类路径下加载spring的配置文件,classpath关键字特指类路径下加载 -->

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:applicationContext.xml</param-value>

</context-param>

<!--2,负责启动spring容器的监听器,它将引用1处的上下文参数,获得spring配置文件的地址 -->

<listener>

<listener-class>

org.springframework.web.context.ContextLoaderListener

</listener-class>

</listener>

<servlet>

<servlet-name>bbs</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:springmvc.xml</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

 

<servlet-mapping>

<servlet-name>bbs</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

 

 

</web-app>

Springmvc.xml content is

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:mvc="http://www.springframework.org/schema/mvc"

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-4.2.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-4.2.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">

 

<!-- 自动扫描带有@Controller注解的控制层，注入为bean -->

<context:component-scan base-package="com.bbs.web" />

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix" value="/WEB-INF/views/" />

<property name="suffix" value=".jsp" />

</bean>

 

 

</beans>

After we've configured it, we should start writing the controller.

First, write a test with the most basic

Under our previous web directory, we created a new class, named, Logincontroller

package com.bbs.web;

 

import javax.servlet.http.HttpServletRequest;

 

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

 

import com.bbs.service.UserService;

 

@Controller

public class LoginController {

 

@Autowired

private UserService userService;

@RequestMapping(value="/login")

public String toLoginPage(){

return "login";

}

}

@controller is the controller's note, huh?

We return a view

The name of the view is login

Remember, we are in the servlet configuration file, this project is springmvc.xml, configuration, page file

Position

Prefix suffix OH

Then we need to create a JSP file, named Login.jsp, according to the location we specify.

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>标题</title>

<body>

这个是首页

</body>

As above, we've written a line of code as a test.

At this point, our entire process is set up and run

Under Eclipse configuration Tomcat, the project is added (right-click New server to create a server to select the tomcat installed on your computer)

Http://localhost:8080/bbs/login.do

Page configured servlet intercept, go to Controller,controller help us find the page

It's a success.

Http://localhost:8080/bbs/login.do

8080 This is the configuration of the server, look at the quasi-port ha, if it is modified to 80, you do not have to write a can omit

BBS is the name of our project

Login is the configuration in our controller

Do is a suffix in the configuration file

SPRINGMVC Project Complete example of spring MVC