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How to start with spring mvc and install dependencies

I am new to spring to know how to get started and how to import dependencies in spring mvc. I am starting a project for web applications, possibly with a single page application

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3 answers

The best website to get started is https://start.spring.io/ . In this package of dependencies, select the project you need and get a hit for your project. You can also install some dependency later according to your needs in the pom.xml file.

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, Gradle.

, :

Git: git clone https://github.com/spring-guides/gs-serving-web-content.git cd gs-serve-web-content/initial -. , gs-serve-web-content/complete.

Gradle

script. , Spring, , Gradle.

; , mkdir -p src/main/java/hello on * nix systems:

└── src

    └── main

        └── java

            └── hello

Gradle

Gradle.

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.4.1.RELEASE")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'

jar {
    baseName = 'gs-serving-web-content'
    version =  '0.1.0'
}

repositories {
    mavenCentral()
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

dependencies {
    compile("org.springframework.boot:spring-boot-starter-thymeleaf")
    compile("org.springframework.boot:spring-boot-devtools")
    testCompile("junit:junit")
}


The Spring Boot gradle plugin provides many convenient features:

It collects all the jars on the classpath and builds a single, runnable "über-jar", which makes it more convenient to execute and transport your service.
    It searches for the public static void main() method to flag as a runnable class.
    It provides a built-in dependency resolver that sets the version number to match Spring Boot dependencies. You can override any version you wish, but it will default to Boot’s chosen set of versions.

    **Create a web controller**

    In Spring’s approach to building web sites, HTTP requests are handled by a controller. You can easily identify these requests by the @Controller annotation. In the following example, the GreetingController handles GET requests for /greeting by returning the name of a View, in this case, "greeting". A View is responsible for rendering the HTML content:


src/main/java/hello/GreetingController.java

package hello;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class GreetingController {

    @RequestMapping("/greeting")
    public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
        model.addAttribute("name", name);
        return "greeting";
    }

}

, . .

@RequestMapping , HTTP-/ greeting().

GET vs. PUT, POST .., @RequestMapping HTTP . @RequestMapping (method = GET), . @RequestParam String name greeting(). ; , "". name Model, .

, Thymeleaf, HTML-. Thymeleaf greeting.html th: text, ${name}, .

src/main/resources/templates/greeting.html

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>Getting Started: Serving Web Content</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
    <p th:text="'Hello, ' + ${name} + '!'" />
</body>
</html>

-

- , . . , Spring Boot , spring -boot-devtools.

LiveReload ,

, WAR , , , . JAR , Java main() . Spring Tomcat HTTP .

src/main/java/hello/Application.java

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

@SpringBootApplication - , :

@Configuration bean . @EnableAutoConfiguration Spring "", beans , beans . @EnableWebMvc Spring MVC, Spring Boot , spring -webmvc . , - , DispatcherServlet. @ComponentScan Spring , hello, . main() Spring Boots SpringApplication.run() . , XML? web.xml. - 100% - Java-, .

JAR

Gradle Maven. JAR , , , . , , ..

Gradle, , . /gradlew bootRun. JAR , . /gradlew build. JAR :

java -jar build/libs/gs-serve-web-content-0.1.0.jar Maven, , . /mvnw spring -boot: run. JAR . /mvnw. JAR :

java -jar target/gs-serve-web-content-0.1.0.jar runnable JAR. WAR. . .

, - , http://localhost:8080/greeting, :

", !" http://localhost:8080/greeting?name=User. , "Hello, World!". ", !":

", !" , @RequestParam GreetingController , . "", .

, HTML JavaScript CSS, Spring Boot, . Spring Boot "/static" ( "/public" ). index.html , " ", , , , http://localhost:8080/ . :

src/main/resources/static/index.html

<!DOCTYPE HTML>
<html>
<head>
    <title>Getting Started: Serving Web Content</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
    <p>Get your greeting <a href="/greeting">here</a></p>
</body>
</html>
and when you restart the app you will see the HTML at http://localhost:8080/.
+1

spring mvc?

Spring MVC , Java, Gradle Maven ( , ANT :))

https://start.spring.io/ Run any of the spring projects from this website, select the dependencies you need. When you click on create, it will load a zip file containing the project (gradle or maven) with all the dependencies selected. And then, later, you can add or change dependencies by editing the build.gradle file (if you selected gradle) or pom.xml (if you selected maven).

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Source: https://habr.com/ru/post/1659194/

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