Spring Boot and JSP Tutorial

2018.05.03 15:54

졸리운_곰 조회 수:414

 

Spring Boot and JSP Tutorial

2- Create a Spring Boot project
3- Configure pom.xml
4- Configure JSP View
5- Controller & JSP
6- Run the application
 
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1- Objective of Post 

 
Spring is a famous framework because it supports a lot of technologies for View layer. The technologies supported for the  View layer by the Spring are JSP, Thymeleaf, Freemarker, ...
Because of the simplicity of Thymeleaf, it is considered as the default technology used for the View layer, and is automatically configured by the  Spring Boot . Therefore, if you choose the JSP for the View layer, you need to configure it.
In this post, I will show you how to create a Web application with the Spring Boot and use the  JSP to display data. The contents will be mentioned in this post:
  1. Configure to use the JSP for the View Layer
  2. Explain the operating principle of Controller & JSP.

2- Create a Spring Boot project

 
On the  Eclipse, create a  Spring Boot ​​​​​​​project.
Enter:
  • Name: SpringBootJSP
  • Group: org.o7planning.org
  • Description: Spring Boot + JSP
  • Package: org.o7planning.sbjsp
Select the technologies and libraries to be used:
  • Web
     
OK, the Project has been created.
SpringBootJspApplication.java
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package org.o7planning.sbjsp;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class SpringBootJspApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootJspApplication.class, args);
    }
}

3- Configure pom.xml

 
Configure the libraries necessary for JSP/Servlet in the  pom.xml file:
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<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
</dependency>
 
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>
The full contents of pom.xml file:
pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
        http://maven.apache.org/xsd/maven-4.0.0.xsd">
         
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>org.o7planning</groupId>
    <artifactId>SpringBootJSP</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
 
    <name>SpringBootJSP</name>
    <description>Spring Boot + JSP</description>
 
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
 
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
 
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
 
</project>

4- Configure JSP View

 
In the  src/main directory, create a  webapp/WEB-INF/jsp subdirectory, your JSP files will be placed into this directory.
In the next step, you need to configure to tell the  Spring Boot the place where you will put JSP files. OK, Open the application.properties file and add the following  properties  :
application.properties
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# =============================================
# VIEW RESOLVER
# =============================================
 
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

5- Controller & JSP

 
The relationship between the  Controller and the  View is explained in the figure:
Person.java
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package org.o7planning.sbjsp.model;
 
public class Person {
 
    private String firstName;
    private String lastName;
 
    public Person() {
 
    }
 
    public Person(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }
 
    public String getFirstName() {
        return firstName;
    }
 
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
 
    public String getLastName() {
        return lastName;
    }
 
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
 
}
MainController.java
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package org.o7planning.sbjsp.controller;
 
import java.util.ArrayList;
import java.util.List;
 
import org.o7planning.sbjsp.model.Person;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
public class MainController {
 
    private static List<Person> persons = new ArrayList<Person>();
 
    static {
        persons.add(new Person("Bill", "Gates"));
        persons.add(new Person("Steve", "Jobs"));
    }
 
    @RequestMapping(value = { "/", "/index" }, method = RequestMethod.GET)
    public String index(Model model) {
 
        String message = "Hello Spring Boot + JSP";
 
        model.addAttribute("message", message);
 
        return "index";
    }
 
    @RequestMapping(value = { "/personList" }, method = RequestMethod.GET)
    public String viewPersonList(Model model) {
 
        model.addAttribute("persons", persons);
 
        return "personList";
    }
 
}
index.jsp
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<!DOCTYPE HTML>
<html>
   <head>
      <meta charset="UTF-8" />
      <title>Welcome</title>
      <link rel="stylesheet" type="text/css"
                href="${pageContext.request.contextPath}/css/style.css"/>
   </head>
   <body>
      <h1>Welcome</h1>
      <h2>${message}</h2>
       
     
         
      <a href="${pageContext.request.contextPath}/personList">Person List</a> 
       
   </body>
   
</html>
personList.jsp
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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 
<!DOCTYPE HTML>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Person List</title>
    <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/css/style.css"/>
  </head>
  <body>
    <h1>Person List</h1>
    
    <br/><br/>
    <div>
      <table border="1">
        <tr>
          <th>First Name</th>
          <th>Last Name</th>
        </tr>
        <c:forEach  items="${persons}" var ="person">
        <tr>
          <td>${person.firstName}</td>
          <td>${person.lastName}</td>
        </tr>
        </c:forEach>
      </table>
    </div>
  </body>
  
</html>

6- Run the application

 
On the Eclipse, right click on the project, select:
  • Run As/Spring Boot App
 
 
[출처] https://o7planning.org/en/11681/spring-boot-and-jsp-tutorial

 

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