三分钟搭建Spring Boot项目框架以及框架的应用

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一、新建springboot项目

1、

  • new–>Project–>Spring Initralizr
  • Group:com.zb
  • Artifact:zbook
  • springboot version:2.0.4

2、

  • 将
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter</artifactId>
</dependency>
  • 改成
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency>

3、此时项目结构

  • maven clean一下，右键ZbookApplication运行，项目就跑起来了，就是这么简单，真正做到了开箱即用。

二、RestFul Api接口

package com.zb.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HomeController {
    @RequestMapping("/")
    public String home(){
        return "Hello, Zbook!";
    }
}

  • ：RestController和Controller注解的区别是：RestController是返回的内容就是返回的内容，相当于加个@ResponseBody,而controller一般是返回的页面

  • 此时打开网页，输入 http://localhost:8080/
    就会看到Hello,Zbook!

三、集成Thymleaf

1、

  • 上面的可以当作是提供服务的接口，假设我们要开发一个web应用，springboot默认是集成的thymleaf。
    springboot是约定大于配置的，我们来看看关于thymleaf的约定
  • （1）默认静态文件（js，css，jpg等）放在resources下面的static文件夹下面
  • （2）页面文件放在templates文件夹下面
    我们采用bootstrap来渲染页面，如下图
login.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>登录</title>
    <link href="/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
    <div class="container">
            <form action="login_in" method="post" class="form-horizontal" role="form" >
                <div class="form-group">
                    <h2 class="col-sm-offset-5 col-sm-4">用户登录</h2>
                </div>
                <div class="form-group">
                    <label for="username" class="col-sm-offset-3 col-sm-2 control-label">用户名：</label>
                    <div class="col-sm-3">
                        <input type="text" class="form-control" id="username" name="username" placeholder="请输入用户名" />
                    </div>
                </div>
                <div class="form-group">
                    <label for="password" class="col-sm-offset-3 col-sm-2 control-label">密码：</label>
                    <div class="col-sm-3">
                        <input type="text" class="form-control" id="password" name="password" placeholder="请输入密码" />
                    </div>
                </div>
                <div class="form-group">
                    <div class="col-sm-offset-5 col-sm-4">
                        <button type="submit" class="btn btn-default">登录</button>
                    </div>
                </div>
            </form>
    </div>
    <script src="/js/jquery-2.2.1.min.js"></script>
    <script src="/js/bootstrap.min.js"></script>
</body>
</html>

2、写一个LoginController

package com.zb.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class LoginController {
    @RequestMapping("/login")
    public String login(){
        return "login";
    }
}

3、加依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

4、

  • 重启， http://localhost:8080/login
    则会看到登录页面

四、集成mybatis

1、springboot的配置文件分为两种：

  • application.properties和application.yml我们把它改成application.yml这种更直观
spring:
  application:
    name: myspringboot
  output:
    ansi:
      enabled: always
  profiles:
    active: dev
  thymeleaf:
    encoding: UTF-8
    prefix: classpath:/templates/

server:
  tomcat:
    uri-encoding: UTF-8
    max-connections: 500
    min-spare-threads: 25
    max-threads: 300
    accept-count: 200
  port: 8080
mybatis:
  type-aliases-package: com.zb.mapper
  mapper-locations: classpath:mapping/*.xml

pagehelper:
  helper-dialect: mysql
  reasonable: true
  support-methods-arguments: true
  params: count=countSql
logging:
  level:
    com.zb.mapper: debug

---

#开发配置
spring:
  profiles: dev
  datasource:
    url: jdbc:mysql://localhost:3306/zb_db?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false&useSSL=false
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    filters: stat
    maxActive: 20
    initialSize: 1
    maxWait: 60000
    minIdle: 1
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: select 'x'
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    maxOpenPreparedStatements: 20

2、添加依赖

<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.3.2</version>
		</dependency>

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

		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>RELEASE</version>
		</dependency>

<!-- 分页插件 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper-spring-boot-starter</artifactId>
			<version>1.2.3</version>
		</dependency>

3、建表

CREATE datebase zb_db;

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  `mobile` varchar(255) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `sex` varchar(255) DEFAULT NULL,
  `nickname` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(1, 'admin', '123456', '13918891675','mmc@163.com', '男', '管理员');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(2, 'lisi2', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(3, 'lisi3', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(4, 'lisi4', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(5, 'lisi5', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(6, 'lisi6', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(7, 'lisi7', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(8, 'lisi8', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(9, 'lisi9', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(10, 'lisi10', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(11, 'lisi11', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(12, 'lisi12', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(13, 'lisi13', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');
insert into `user`(id, username, password, mobile, email,sex, nickname) VALUES(14, 'lisi14', '123456', '13918891675','mmc@163.com', 'm', 'lisi1');

4、用mybatisgenerator自动生成文件


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包-->
    <classPathEntry  location="C:\\Users\\DELL\\Downloads\\mysql-connector-java-5.1.22-bin.jar"/>
    <context id="DB2Tables"  targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--数据库链接URL，用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/zb_db" userId="root" password="123456">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 生成模型的包名和位置-->
        <javaModelGenerator targetPackage="com.zb.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- 生成映射文件的包名和位置-->
        <sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.zb.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
        <table tableName="role_permission" domainObjectName="RolePermission" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
    </context>
</generatorConfiguration>

5、在pom里面添加plugin


<!-- mybatis generator 自动生成代码插件 -->
			<plugin>
				<groupId>org.mybatis.generator</groupId>
				<artifactId>mybatis-generator-maven-plugin</artifactId>
				<version>1.3.2</version>
				<configuration>
					<configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
					<overwrite>true</overwrite>
					<verbose>true</verbose>
				</configuration>
			</plugin>

6、用mvn mybatis-generator:generate -e命令生成文件

  • 此时目录结构

7、写dao和service,controller,mapper

  • mapper增加了几个方法
@Select("Select * from user")
List<User> selectAll();

@Select("Select * from user where username = #{username} and password = #{password}")
User selectByUsernamePass(@Param("username") String username, @Param("password") String password);

@Select("Select * from user where username = #{username}")
User selectByUsername(@Param("username") String username);
  • dao和service都是正常调用，下面是controller

package com.zb.controller;
import com.github.pagehelper.PageInfo;
import com.zb.model.User;
import com.zb.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/user")
    @ResponseBody
    public User getUserById(int id){
        User user = userService.selectByPrimaryKey(id);
        return user;
    }

    @RequestMapping("/userlist")
    public String getUserList(Model model, PageInfo pageInfo){
        int pageNum  = (pageInfo.getPageNum() == 0)? 1 : pageInfo.getPageNum();
        int pageSize  = (pageInfo.getPageSize() == 0)? 10 : pageInfo.getPageSize();
        PageInfo<User> result = userService.selectAll(pageNum, pageSize);
        model.addAttribute("users", result.getList());
        model.addAttribute("pageInfo", result);
        return "userlist";
    }

    @RequestMapping("/userdelete")
    public String userdelete(以上是关于三分钟搭建Spring Boot项目框架以及框架的应用的主要内容，如果未能解决你的问题，请参考以下文章
 

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