springBoot入门
对Mybatis注解方式有兴趣的，可以查看我的另一篇：Spring boot Mybatis 整合（注解版） 注解方式更加简洁简单，极大程度的提高了开发速度。
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Spring Boot属性配置文件详解
Spring Boot中使用@Scheduled创建定时任务
Spring Boot中使用@Async实现异步调用
Spring boot Mybatis 整合（注解版）
springboot事务管理详解
springboot中使用Mybatis注解配置详解
正题
本项目使用的环境：
- 开发工具：Intellij IDEA 2017.1.3
- jdk：1.8.0_161
- maven:3.3.9
额外功能
- PageHelper 分页插件
- mybatis generator 自动生成代码插件
步骤：
1.创建一个springboot项目：
2.创建项目的文件结构以及jdk的版本
3.选择项目所需要的依赖
然后点击finish
5.看一下文件的结构：
6.查看一下pom.xml：
<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.wintergroupId>
<artifactId>springboot-mybatis-demoartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>jarpackaging>
<name>springboot-mybatis-demoname>
<description>Demo project for Spring Bootdescription>
<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-jdbcartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>1.3.0version>
dependency>
<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-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.35version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.0.11version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-coreartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatypegroupId>
<artifactId>jackson-datatype-jodaartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.modulegroupId>
<artifactId>jackson-module-parameter-namesartifactId>
dependency>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelper-spring-boot-starterartifactId>
<version>1.1.2version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.0version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
<plugin>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generator-maven-pluginartifactId>
<version>1.3.2version>
<configuration>
<configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xmlconfigurationFile>
<overwrite>trueoverwrite>
<verbose>trueverbose>
configuration>
plugin>
plugins>
build>
project>
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7.项目不使用application.properties文件 而使用更加简洁的application.yml文件：
将原有的resource文件夹下的application.properties文件删除，创建一个新的application.yml配置文件，
文件的内容如下：
server:
port: 8080
spring:
datasource:
name: test
url: jdbc:mysql://127.0.0.1:3306/depot
username: root
password: root
# 使用druid数据源
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
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
mybatis:
mapper-locations: classpath:mapping/*.xml
type-aliases-package: com.winter.model
pagehelper分页插件
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
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8.创建数据库：
CREATE DATABASE mytest;
CREATE TABLE t_user(
user_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
user_name VARCHAR(255) NOT NULL ,
password VARCHAR(255) NOT NULL ,
phone VARCHAR(255) NOT NULL
) ENGINE=INNODB AUTO_INCREMENT=1000 DEFAULT CHARSET=utf8;
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9.使用mybatis generator 自动生成代码：
- 配置pom.xml中generator 插件所对应的配置文件 ${basedir}/src/main/resources/generator/generatorConfig.xml
<generatorConfiguration>
<classPathEntry location="E:\developer\mybatis-generator-core-1.3.2\lib\mysql-connector-java-5.1.25-bin.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="true"/>
<property name="suppressAllComments" value="true"/>
commentGenerator>
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/mytest" userId="root" password="root">
jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
javaTypeResolver>
<javaModelGenerator targetPackage="main.java.com.winter.model" targetProject="src">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
javaModelGenerator>
<sqlMapGenerator targetPackage="main.resources.mapping" targetProject="src">
<property name="enableSubPackages" value="true"/>
sqlMapGenerator>
<javaClientGenerator type="XMLMAPPER" targetPackage="main.java.com.winter.mapper" targetProject="src">
<property name="enableSubPackages" value="true"/>
javaClientGenerator>
<table tableName="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">table>
context>
generatorConfiguration>
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- 点击run-Edit Configurations
- 添加配置
运行
最后生成的文件以及结构：
10.我们还需要修改有点东西，因为生成的类中的路径写了全路径，所以我们要把前面多余的删掉：
UserMapper.java
package com.winter.mapper;
import com.winter.model.User;
public interface UserMapper {
int deleteByPrimaryKey(Integer userId);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer userId);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
//这个方式我自己加的
List selectAllUser();
}
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User.java
package com.winter.model;
public class User {
private Integer userId;
private String userName;
private String password;
private String phone;
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName == null ? null : userName.trim();
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password == null ? null : password.trim();
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone == null ? null : phone.trim();
}
}
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对于映射文件xml有一个快捷的方式把所有德多余的代码一次删掉：
Ctrl+F 进行搜索“main.java.”:
对于sql语句这种黄色的背景，真心是看不下去了（解决方案）：
UserMapper.xml
<mapper namespace="com.winter.mapper.UserMapper" >
<resultMap id="BaseResultMap" type="com.winter.model.User" >
<id column="user_id" property="userId" jdbcType="INTEGER" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
<result column="phone" property="phone" jdbcType="VARCHAR" />
resultMap>
<sql id="Base_Column_List" >
user_id, user_name, password, phone
sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from t_user
where user_id = #{userId,jdbcType=INTEGER}
select>
<select id="selectAllUser" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from t_user
select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from t_user
where user_id = #{userId,jdbcType=INTEGER}
delete>
<insert id="insert" parameterType="com.winter.model.User" >
insert into t_user (user_id, user_name, password,
phone)
values (#{userId,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
#{phone,jdbcType=VARCHAR})
insert>
<insert id="insertSelective" parameterType="com.winter.model.User" >
insert into t_user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="userId != null" >
user_id,
if>
<if test="userName != null" >
user_name,
if>
<if test="password != null" >
password,
if>
<if test="phone != null" >
phone,
if>
trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="userId != null" >
#{userId,jdbcType=INTEGER},
if>
<if test="userName != null" >
#{userName,jdbcType=VARCHAR},
if>
<if test="password != null" >
#{password,jdbcType=VARCHAR},
if>
<if test="phone != null" >
#{phone,jdbcType=VARCHAR},
if>
trim>
insert>
<update id="updateByPrimaryKeySelective" parameterType="com.winter.model.User" >
update t_user
<set >
<if test="userName != null" >
user_name = #{userName,jdbcType=VARCHAR},
if>
<if test="password != null" >
password = #{password,jdbcType=VARCHAR},
if>
<if test="phone != null" >
phone = #{phone,jdbcType=VARCHAR},
if>
set>
where user_id = #{userId,jdbcType=INTEGER}
update>
<update id="updateByPrimaryKey" parameterType="com.winter.model.User" >
update t_user
set user_name = #{userName,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
phone = #{phone,jdbcType=VARCHAR}
where user_id = #{userId,jdbcType=INTEGER}
update>
mapper>
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11.打开类SpringbootMybatisDemoApplication.java，这个是springboot的启动类。我们需要添加点东西：
package com.winter;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.winter.mapper")//将项目中对应的mapper类的路径加进来就可以了
public class SpringbootMybatisDemoApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootMybatisDemoApplication.class, args);
}
}
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12.到这里所有的搭建工作都完成了，接下来就是测试的工作，没使用junit4进行测试：
首先看一下完成之后的文件的结构：
现在controller，service层的代码都写好：
UserController.java
package com.winter.Controller;
import com.winter.model.User;
import com.winter.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* Created by Administrator on 2017/8/16.
*/
@Controller
@RequestMapping(value = "/user")
public class UserController {
@Autowired
private UserService userService;
@ResponseBody
@RequestMapping(value = "/add", produces = {"application/json;charset=UTF-8"})
public int addUser(User user){
return userService.addUser(user);
}
@ResponseBody
@RequestMapping(value = "/all/{pageNum}/{pageSize}", produces = {"application/json;charset=UTF-8"})
public Object findAllUser(@PathVariable("pageNum") int pageNum, @PathVariable("pageSize") int pageSize){
return userService.findAllUser(pageNum,pageSize);
}
}
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UserService.java
package com.winter.service;
import com.winter.model.User;
import java.util.List;
/**
* Created by Administrator on 2017/8/16.
*/
public interface UserService {
int addUser(User user);
List findAllUser(int pageNum, int pageSize);
}
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UserServiceImpl.java
package com.winter.service.impl;
import com.github.pagehelper.PageHelper;
import com.winter.mapper.UserMapper;
import com.winter.model.User;
import com.winter.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* Created by Administrator on 2017/8/16.
*/
@Service(value = "userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;//这里会报错，但是并不会影响
@Override
public int addUser(User user) {
return userMapper.insertSelective(user);
}
/*
* 这个方法中用到了我们开头配置依赖的分页插件pagehelper
* 很简单，只需要在service层传入参数，然后将参数传递给一个插件的一个静态方法即可；
* pageNum 开始页数
* pageSize 每页显示的数据条数
* */
@Override
public List findAllUser(int pageNum, int pageSize) {
//将参数传给这个方法就可以实现物理分页了，非常简单。
PageHelper.startPage(pageNum, pageSize);
return userMapper.selectAllUser();
}
}
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如果强迫症看不下去那个报错：（解决方法）
测试我使用了idea一个很用心的功能。
可以发http请求的插件：
点击左侧的运行按钮就可以发送请求了；
如果返回值正确 说明你已经搭建成功了！！
如果大家想使用事务控制的话，请参照Spring boot Mybatis 整合（注解版） ,这个里面就有关于事务控制的使用
源码地址：https://github.com/WinterChenS/springboot-mybatis-demo