spring boot学习笔记（一）

一、spring boot项目搭建
1、项目采用spring boot + mybatis，项目管理采用maven。至于maven安装以及环境配置就不细说了。
2、创建maven项目，pom.xml文件内容如下：

<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>4.0.0modelVersion>

    <groupId>com.manninggroupId>
    <artifactId>readingListartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <packaging>jarpackaging>

    <name>readingListname>
    <description>Reading List Demodescription>
    
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>1.5.6.RELEASEversion>
        <relativePath/> 
    parent>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <java.version>1.7java.version>
    properties>

    <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
        dependency>
        
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-jdbcartifactId>
        dependency>
        
        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>1.1.1version>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>

        <dependency>
            <groupId>net.sourceforge.nekohtmlgroupId>
            <artifactId>nekohtmlartifactId>
            <version>1.9.22version>
        dependency>
    dependencies>

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

3、创建maven项目结构如下：

4、创建入口java文件(ReadingListApplication.java)：

package com.manning;

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

@SpringBootApplication
public class ReadingListApplication {

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

a、@SpringBootApplication注解开启组件扫描自动注释；
b、main()方法启动引导应用程序；

5、定义一个用户类(User)：

package com.manning.entity;

public class User {

    private String username;

    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

6、定义dao层接口：

package com.manning.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import com.manning.entity.User;

@Mapper
public interface UserMapper {

    public List queryUserByName(String username);
}

创建对应的mapper.xml文件：

<mapper namespace="com.manning.dao.UserMapper">
    <select id="queryUserByName" resultType="User">
        select * from user
    select>

mapper>

7、定义server层接口和实现类：

package com.manning.service;

import java.util.List;

import com.manning.entity.User;

public interface UserService {

    public List queryUserByName(String username); 
}

实现类：

package com.manning.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.manning.dao.UserMapper;
import com.manning.entity.User;
import com.manning.service.UserService;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public List queryUserByName(String username) {
        return userMapper.queryUserByName(username);
    }

}

8、定义controller类：

package com.manning.controller;

import java.util.List;

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 com.manning.entity.User;
import com.manning.service.UserService;

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping("/queryUserByName")
    public String queryUserByName(String username,Model model){

        List list = userService.queryUserByName(username);
        model.addAttribute("users", list);

        return "userList";
    }
}

9、在src/main/resources/templates下创建页面：

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Reading Listtitle>
<link rel="stylesheet" th:href="@{/style.css}">link>
head>
<body>
    <h2>用户列表：h2>
    <div>
    <div th:unless="${#lists.isEmpty(users)}">
        <dl th:each="user : ${users}">
            <dt class="bookHeadline">
                <span th:text="用户名：${user.username}">span>
                <span th:text="密码：${user.password}">span> 
            dt>
        dl>
    div>
body>
html>

10、application.properties配置文件：

mybatis.type-aliases-package=com.manning.entity
mybatis.mapper-locations=classpath:mapper/*Mapper.xml

spring.datasource.driver-class-name= com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root

spring.thymeleaf.mode=LEGACYHTML5

spring.thymeleaf.cache=false

spring.thymeleaf.cache=false 禁用模板缓存，避免开发过程中每次修改页面也要重启服务的烦恼。

11、启动项目：
本人用的是eclipse工具，如果eclipse没有安装STS插件，那么需要在入口类(ReadingListApplication.java)通过以下方式启动：

启动成功控制台打印图片：

本人第一次写文章，有问题希望各位朋友们见谅和指出，谢谢！
文章参考：http://www.cnblogs.com/suncj/p/4065589.html