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.