Spring-boot+Mybatis+Maven+MySql搭建实例
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转自：https://www.jianshu.com/p/95fb7be049ae
最近读了spring-boot开发手册，spring-boot相比于spring-mvc封装了很多常用的依赖，并且内置了tomcat容器，启动生成的jar包即可启动项目，也是目前流行的微服务常用框架。本文主要用到了spring-boot，以及mybatis，数据库用到了mysql。
源码下载
准备工作
1.首先创建一个表：
CREATE TABLE `t_user` (
`USER_ID` int(11) NOT NULL AUTO_INCREMENT,
`USER_NAME` char(30) NOT NULL,
`USER_PASSWORD` char(10) NOT NULL,
`USER_EMAIL` char(30) NOT NULL,
PRIMARY KEY (`USER_ID`),
KEY `IDX_NAME` (`USER_NAME`)
) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8
插入一些数据：
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (1, ‘林炳文‘, ‘[email protected]‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (2, ‘evan‘, ‘123‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (3, ‘kaka‘, ‘cadg‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (4, ‘simle‘, ‘cscs‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (5, ‘arthur‘, ‘csas‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (6, ‘小德‘, ‘yuh78‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (7, ‘小小‘, ‘cvff‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (8, ‘林林之家‘, ‘gvv‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (9, ‘林炳文Evankaka‘, ‘dfsc‘, ‘[email protected]‘);
INSERT INTO t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) VALUES (10, ‘apple‘, ‘uih6‘, ‘[email protected]‘);
创建工程
我习惯于先创建好maven项目，构建目录再导入到编译器中，这样的好处就是搭建好一个脚手架模板，后面改改参数就可以用到各个工程里面。
构建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>4.0.0</modelVersion>
<groupId>com.boot</groupId>
<artifactId>testSpringBoot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>testSpringBoot</name>
<packaging>jar</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- mybatis依赖 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<!-- 引入thymelaf 则不需要引入web依赖，若不需要thymelaf则需要添加spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!-- mysql依赖 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<!-- 要使生成的jar可运行，需要加入此插件 -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
工程目录
创建的文件目录如图：
工程目录
启动器以及controller
（1） 启动器
在com.boot(即最外层目录文件)下写一个如下main方法:
package com.boot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
}
（2）controller
在com.boot.web下创建一个类如下:
package com.boot.web;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class MainController {
@RequestMapping(value = "/")
String home() {
return "Hello World!";
}
}
（3）启动项目
找到com.boot下的Application以java Application方式启动，然后打开浏览器输入localhost:8080就会出现Hello World!
启动页面
添加java代码
（1）User.java
对应数据库中表的字段，放在src/main/java下的包com.boot.domain
package com.boot.domain;
public class User {
private Integer userId;
private String userName;
private String userPassword;
private String userEmail;
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;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
public String getUserEmail() {
return userEmail;
}
public void setUserEmail(String userEmail) {
this.userEmail = userEmail;
}
@Override
public String toString() {
return "User [userId=" + userId + ", userName=" + userName
+ ", userPassword=" + userPassword + ", userEmail=" + userEmail
+ "]";
}
}
（2）UserDao.java
Dao接口类，用来对应mapper文件。放在src/main/java下的包com.lin.dao,内容如下：
package com.boot.dao;
import org.apache.ibatis.annotations.Mapper;
import com.boot.domain.User;
@Mapper
public interface UserDao {
public User selectUserById(Integer userId);
}
（3）UserService.java和UserServiceImpl.java
service接口类和实现类，放在src/main/java下的包com.lin.service,内容如下：
UserService.java
package com.boot.service;
import com.boot.domain.User;
public interface UserService {
User selectUserById(Integer userId);
}
UserServiceImpl.java
package com.boot.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.boot.dao.UserDao;
import com.boot.domain.User;
import com.boot.service.UserService;
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserDao userDao;
@Override
public User selectUserById(Integer userId) {
return userDao.selectUserById(userId);
}
}
（4）mapper文件
用来和dao文件对应，放在src/main/resources中的com/boot/mapper目录下
UserMapper.xml路径
UserMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.boot.dao.UserDao">
<!--设置domain类和数据库中表的字段一一对应，注意数据库字段和domain类中的字段名称不致，此处一定要！-->
<resultMap id="BaseResultMap" type="com.boot.domain.User">
<id column="USER_ID" property="userId" jdbcType="INTEGER" />
<result column="USER_NAME" property="userName" jdbcType="CHAR" />
<result column="USER_PASSWORD" property="userPassword" jdbcType="CHAR" />
<result column="USER_EMAIL" property="userEmail" jdbcType="CHAR" />
</resultMap>
<!-- 查询单条记录 -->
<select id="selectUserById" parameterType="int" resultMap="BaseResultMap">
SELECT * FROM t_user WHERE USER_ID = #{userId}
</select>
</mapper>
资源配置
下列所有文件均在src/main/resources目录下
（1）spring-boot配置
不少人都Properties资源文件来配置，不过这种文件在eclipse编码的默认设置是ISO-8859-1，需要修改eclipse的设置才能显示中文。因此我比较喜欢用yml文件来配置，一个是结构明显，另外一个不用考虑编码的问题。
application.yml
spring:
thymeleaf:
mode: html5
encoding: UTF-8
content-type: text/html
# 开发禁用缓存
cache: false
datasource:
url: jdbc:mysql://localhost:3306/ssmDb?characterEncoding=UTF-8&useSSL=true
username: root
password: password
# 可省略驱动配置, sprin-boot 会由url检测出驱动类型
# driver-class-name: com.mysql.jdbc.Driver
hikari:
connection-timeout: 60000
mybatis:
mapperLocations: classpath:com/boot/mapper/*.xml
typeAliasesPackage: cn.boot.domain
# spring-boot默认打印输出info级别以上的，可在此处修改输出级别
logging:
level:
root: info
（2）日志打印logback-spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<!-- 控制台输出 -->
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
</encoder>
</appender>
<!-- 时间滚动输出 level为 INFO 日志 -->
<appender name="file-info" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>INFO</level>
<onMatch>ACCEPT</onMatch>
<onMismatch>DENY </onMismatch>
</filter>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<FileNamePattern>./logs/info.%d{yyyy-MM-dd}.log</FileNamePattern>
<MaxHistory>30</MaxHistory>
</rollingPolicy>
<encoder>
<pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
</encoder>
</appender>
<!-- 时间滚动输出 level为 DEBUG 日志 -->
<appender name="file-debug" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>DEBUG</level>
<onMatch>ACCEPT</onMatch>
<onMismatch>DENY </onMismatch>
</filter>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<FileNamePattern>./logs/debug.%d{yyyy-MM-dd}.log</FileNamePattern>
<MaxHistory>30</MaxHistory>
</rollingPolicy>
<encoder>
<pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
</encoder>
</appender>
<!-- 时间滚动输出 level为 ERROR 日志 -->
<appender name="file—error" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>ERROR</level>
<onMatch>ACCEPT</onMatch>
<onMismatch>DENY </onMismatch>
</filter>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<FileNamePattern>./logs/error.%d{yyyy-MM-dd}.log</FileNamePattern>
<MaxHistory>30</MaxHistory>
</rollingPolicy>
<encoder>
<pattern>%date [%thread] %-5level %logger{80} - %msg%n</pattern>
</encoder>
</appender>
<logger name="org.apache.ibatis" level="INFO"/>
<logger name="java.sql.Connection" level="debug" />
<logger name="java.sql.Statement" level="debug" />
<logger name="java.sql.PreparedStatement" level="debug" />
<root level="info">
<appender-ref ref="stdout" />
<appender-ref ref="file-info" />
</root>
</configuration>
单元测试
spring-boot单元测试只需引入spring-boot-starter-test即可，里面集成了Junit以及Spring Test & Spring Boot Test等依赖。
测试类目录
（1）测试基类
package com.boot.baseTest;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public abstract class SpringTestCase {
Logger logger = LoggerFactory.getLogger(this.getClass());
}
（2）测试类
package com.boot.serviceTest;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import com.boot.baseTest.SpringTestCase;
import com.boot.domain.User;
import com.boot.service.UserService;
public class UserServiceTest extends SpringTestCase{
Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
private UserService userService;
@Test
public void selectUserByIdTest(){
User user = userService.selectUserById(10);
logger.info("查找结果" + user);
}
}
选中测试类右键run as选中Junit Test即可，可以看到打印输出了id为10的User对象
2018-02-04 21:20:07,442 [main] INFO com.boot.serviceTest.UserServiceTest - 查找结果User [userId=10, userName=apple, userPassword=uih6, [email protected]]
数据库数据
若看到正常输出，此时可以开始配置web页面了。
web页面配置
（1）静态资源
静态资源放在src/main/resources/static目录下
图片.png
（2）index.html
spring-boot支持thymeleaf模板引擎，模板文件默认放在src/main/resources/templates目录下
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta content="text/html;charset=UTF-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1"/>
<link th:href="@{/js/jquery-1.11.3.min.js}" rel="stylesheet"/>
</head>
<body>
<h2>Hello World!</h2>
<p th:text="${user.userId}"></p>
<p th:text="${user.userName}"></p>
<p th:text="${user.userPassword}"></p>
<p th:text="${user.userEmail}"></p>
</body>
</html>
xmlns:th="http://www.thymeleaf.org"命名空间，将镜头转化为动态的视图，需要进行动态处理的元素使用“th:”前缀；link引入jquery框架，通过@{}引入web静态资源（括号里面是资源路径）访问model中的数据通过${}访问。
（4）自定义错误页面
spring-boot错误页面默认在src/main/resources/static/error或者src/main/resources/public/error下，在此简单写了个404页面，命名为404.html放到目录下即可
404.html
<!DOCTYPE html>
<html >
<body>
<h2>404 not found</h2>
</body>
</html>
（5）controller
package com.boot.web;
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.boot.domain.User;
import com.boot.service.UserService;
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "")
public String getIndex(Model model){
User user = userService.selectUserById(1);
model.addAttribute("user", user);
return "index";
}
}
**（6）启动工程
启动工程以后打开http://localhost:8080/user即可看到如下图：
index页面
若打开任意不存在的页面，会返回404.html中内容
404
打包工程
使用package命令给工程打包成jar包
mvn package
此时会在target下生成一个jar包，启动即可：
java -jar targettestSpringBoot-0.0.1-SNAPSHOT.jar
输出如下
λ java -jar target estSpringBoot-0.0.1-SNAPSHOT.jar
. ____ _ __ _ _
/\ / ___‘_ __ _ _(_)_ __ __ _ ( ( )\___ | ‘_ | ‘_| | ‘_ / _` | \/ ___)| |_)| | | | | || (_| | ) ) ) )
‘ |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.9.RELEASE)作者：GCYML
链接：https://www.jianshu.com/p/95fb7be049ae
來源：简书
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