spring web mvc环境搭建

这两天在学习spring，哎，没办法呀，成都基本都是java，不喜欢学这个也没有用。多学点多条路。还得生活不是。

好了，言归正传，我这里记录下我搭建spring mvc的过程，其实过程不算太难，主要是开始我用的xml配置，后面改成java配置的(现在好像都倾向于java代码配置了)，不知道什么时候丢了tomcat的配置，然后一直找不到controller，让我查了好几天。

搭建之前，需要安装maven且配置正确，我这里也没用的xml配置,用的java的配置。

一创建spring mvc工程，我是基本maven骨架弄的。选的webapp这个。

二配置pom.xml，增加一些依赖

<properties>

  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

  <maven.compiler.source>1.7</maven.compiler.source>

  <maven.compiler.target>1.7</maven.compiler.target>

  <spring.version>4.3.18.RELEASE</spring.version>

  <spring.jdbc.version>5.2.0.RELEASE</spring.jdbc.version>

  <mysql.connector.version>5.1.21</mysql.connector.version>

  <servlet.version>3.0.1</servlet.version>

  <jsp.version>2.2.1-b03</jsp.version>

  <jstl.version>1.2</jstl.version>

</properties>

<dependencies>

  <dependency>

    <groupId>junit</groupId>

    <artifactId>junit</artifactId>

    <version>4.11</version>

    <scope>test</scope>

  </dependency>

    <dependency>

        <groupId>javax.servlet.jsp.jstl</groupId>

        <artifactId>jstl-api</artifactId>

        <version>1.2</version>

    </dependency>

   <dependency>

    <groupId>javax.servlet</groupId>

    <artifactId>javax.servlet-api</artifactId>

    <version>${servlet.version}</version>

  </dependency>

  <dependency>

    <groupId>javax.servlet.jsp</groupId>

    <artifactId>jsp-api</artifactId>

    <version>${jsp.version}</version>

    <scope>provided</scope>

  </dependency>

  <dependency>

    <groupId>javax.servlet</groupId>

    <artifactId>jstl</artifactId>

    <version>${jstl.version}</version>

  </dependency>

  <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-core</artifactId>

    <version>${spring.version}</version>

  </dependency>

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-beans</artifactId>

    <version>${spring.version}</version>

  </dependency>

  <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-test</artifactId>

    <version>${spring.version}</version>

    <scope>test</scope>

  </dependency>

  <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-context</artifactId>

    <version>${spring.version}</version>

  </dependency>

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-web</artifactId>

    <version>${spring.version}</version>

  </dependency>

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-webmvc</artifactId>

    <version>${spring.version}</version>

  </dependency>

<!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf-spring4 -->

<dependency>

    <groupId>org.thymeleaf</groupId>

    <artifactId>thymeleaf-spring4</artifactId>

    <version>3.0.11.RELEASE</version>

</dependency>

  <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->

  <dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-jdbc</artifactId>

    <version>${spring.jdbc.version}</version>

  </dependency>

  <dependency>

    <groupId>mysql</groupId>

    <artifactId>mysql-connector-java</artifactId>

    <version>${mysql.connector.version}</version>

  </dependency>

</dependencies>

三创建项目目录结构，如下图

配置DispatcherServlet

初始化,继承AbstractAnnotationConfigDispatcherServletInitializer这个类，spring会自动检测到的。

package com.smartrui.common.config;

import org.springframework.web.filter.CharacterEncodingFilter;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

import javax.servlet.Filter;

public class Initializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    private static final String CHARACTER_ENCODING = "UTF-8";

    private static final String DISPATCHER_SERVLET_MAPPING = "/";

    @Override

    protected Class<?>[] getRootConfigClasses() {

        return new Class[]{WebAppConfig.class};

    }

    @Override

    protected Class<?>[] getServletConfigClasses() {

        return null;

    }

    @Override

    protected String[] getServletMappings() {

        return new String[]{DISPATCHER_SERVLET_MAPPING};

    }

    @Override

    protected Filter[] getServletFilters() {

        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();

        characterEncodingFilter.setEncoding(CHARACTER_ENCODING);

        characterEncodingFilter.setForceEncoding(true);

        return new Filter[] { characterEncodingFilter };

    }

}

增加配置文件，需要添加几个注解 ,@EnableWebMvc, @Configuration,@ComponentScan,其中ComponentScan这里增加需要让spring注入的包。

package com.smartrui.common.config;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.Import;

import org.springframework.web.servlet.ViewResolver;

import org.springframework.web.servlet.config.annotation.*;

import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration

@EnableWebMvc

@ComponentScan(basePackages = {"com.smartrui.dao","com.smartrui.service","com.smartrui.controller"})

public class WebAppConfig extends WebMvcConfigurerAdapter {

    @Override

    public void addResourceHandlers( ResourceHandlerRegistry registry) {

        super.addResourceHandlers(registry);

        registry.addResourceHandler("/img/**").addResourceLocations("/img/");

    }

    @Bean

    public ViewResolver viewResolver() {

        InternalResourceViewResolver resolver = new InternalResourceViewResolver();

        resolver.setPrefix("/WEB-INF/views/");

        resolver.setSuffix(".jsp");

        resolver.setExposeContextBeansAsAttributes(true);

        return resolver;

    }

    @Override

    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {

        configurer.enable();

    }

}

五写一个controller入口

package com.smartrui.controller;

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;

import java.util.ArrayList;

import java.util.List;

@Controller

@RequestMapping("/home")

public class HomeController {

    @RequestMapping("/hello")

    public String hello(Model model){

        List<String> s = new ArrayList<>();

        s.add("1");

        s.add("2");

        model.addAttribute("mystr", s);

        return "hello"; //返回视图名 web-info/views/hello.jsp

    }

    @RequestMapping(value="/user/{id}",method= RequestMethod.GET)

    public String show(@PathVariable("id") long id,Model model) {

        //接受参数测试  /home/user/33

        model.addAttribute("id",id);

        return "hello";

    }

    @RequestMapping("/welcome")

    public String welcome(){

        return "welcome"; //返回视图名 web-info/views/welcome.html

    }

}

六配置 tomcat

这里那个Deploy at the server startup这里要注意配置下，我开始从xml配置换成java配置的时候，这里配置没了。然后就一直找不到controller。

配置完后，点运行，如果没问题，在浏览器输入 http://localhost:8080/home/hello 应该就能显示了.

这里只是一个基本的环境配置，像数据库，模板什么的都没有配置，这些后续慢慢配置吧.