您的位置：首页 > 编程语言 > Java开发

spring boot 入门-使用spring boot构建简单应用

2017-01-10 16:14 896 查看

目的：建立一个简单的联系人列表；　使用 spring boot + maven 进行构建

【0】文件结构如下：

【1】pom.xml 如下：

<?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>com.habuma</groupId>
<artifactId>contacts</artifactId>
<version>0.1.0</version>
<packaging>jar</packaging>
<!-- spring boot 的 web starter 能够将 spring mvc 需要的所有内容全部添加到构建中-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.4.RELEASE</version>
</parent>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring4</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId> org.springframework.boot</groupId>
<artifactId>spring-boot-actuator</artifactId>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

【2】请求控制器 ContactController.java

package contacts;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/")
public class ContactController {
private ContactRepository contactRepo;

@Autowired
public ContactController(ContactRepository contactRepo) {
this.contactRepo = contactRepo;
}
@RequestMapping(method=RequestMethod.GET)
public String home(Map<String,Object> model) {
List<Contact> contacts = contactRepo.findAll();
model.put("contacts", contacts);
return "home";
}
@RequestMapping(method=RequestMethod.POST)
public String submit(Contact contact) {
contactRepo.save(contact);
return "redirect:/";
}
}

【3】java bean, Contact.java

public class Contact {
private Long id;
private String firstName;
private String lastName;
private String phoneNumber;
private String emailAddress;
// setter + getter 方法
}

【4】创建视图
【4.1】在maven中建立以来 thymeleaf 模板

<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring4</artifactId>
</dependency>

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Spring Boot Contacts</title>
<link rel="stylesheet" th:href="@{/style.css}" />
</head>
<body>
<h2>Spring Boot Contacts</h2>
<form method="POST">
<label for="firstName"> First Name:</label> <input type="text" name="firstName"></input><br />
<label for="lastName"> Last Name:</label> <input type="text" name="lastName"></input><br />
<label for="phoneNumber"> Phone #:</label> <input type="text" name="phoneNumber"></input><br />
<label for="emailAddress"> Email:</label><input type="text" name="emailAddress"></input><br />
<input type="submit"></input>
</form>

<ul th:each="contact : ${contacts}">
<li>
<span th:text="${contact.firstName}">First
</span><span th:text="${contact.lastName}">Last</span> :
<span th:text="${contact.phoneNumber}">phoneNumber</span>,
<span th:text="${contact.emailAddress}">emailAddress</span>
</li>
</ul>
</body>
</html>

style.css

body {
background-color: #eeeeee;
font-family: sans-serif;
}
label {
display: inline-block;
width: 120px;
text-align: right;
}

【5】持久化数据
【5,.1】建立maven依赖 jdbc 和 h2 内嵌数据库

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>

【5.2】基于spring 建立 dao

package contacts;
import java.util.List;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

@Repository
public class ContactRepository {
private JdbcTemplate jdbc;

@Autowired
public ContactRepository(JdbcTemplate jdbc) {
this.jdbc = jdbc;
}
public List<Contact> findAll() {
return jdbc.query(
"select id, firstName, lastName, phoneNumber, emailAddress " +
"from contacts order by lastName",
new RowMapper<Contact>() {
public Contact mapRow(ResultSet rs, int rowNum)
throws SQLException {
Contact contact = new Contact();
contact.setId(rs.getLong(1));
contact.setFirstName(rs.getString(2));
contact.setLastName(rs.getString(3));
contact.setPhoneNumber(rs.getString(4));
contact.setEmailAddress(rs.getString(5));
return contact;
}
});
}
public void save(Contact contact) {
jdbc.update(
"insert into contacts " +
"(firstName, lastName, phoneNumber, emailAddress) " +
"values (?, ?, ?, ?)",
contact.getFirstName(), contact.getLastName(),
contact.getPhoneNumber(), contact.getEmailAddress());
}
}

【6】建立启动类

package contacts;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.ComponentScan;

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

【7】构建项目 mvn pacakge

补充： schema.sql SQL文件：

create table contacts (
id identity,
firstName varchar(30) not null,
lastName varchar(50) not null,
phoneNumber varchar(13),
emailAddress varchar(30)
);

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航