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:
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2.创建项目的文件结构以及jdk的版本
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3.选择项目所需要的依赖
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然后点击finish
5.看一下文件的结构:
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6.查看一下pom.xml:
<?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.winter</groupId>
<artifactId>springboot-mybatis-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot-mybatis-demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.7</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-joda</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-parameter-names</artifactId>
</dependency>
<!-- 分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.1.2</version>
</dependency>
<!-- alibaba的druid数据库连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</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>
</plugins>
</build></project>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: 8080spring: 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: 20mybatis: 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
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;
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
<?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="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"/> <!-- 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/mytest" userId="root" password="root"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 生成模型的包名和位置--> <javaModelGenerator targetPackage="com.winter.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.winter.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="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> </context></generatorConfiguration>
点击run-Edit Configurations
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添加配置
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运行
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最后生成的文件以及结构:
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10. 生成的文件
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<User> selectAllUser();
}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();
}
}对于sql语句这种黄色的背景,真心是看不下去了(解决方案):
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**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.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>
<!-- 这个方法是我自己加的 -->
<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>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);
}
}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:
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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);
}
}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<User> findAllUser(int pageNum, int pageSize);
}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<User> 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();
}
}如果强迫症看不下去那个报错:(解决方法)
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测试我使用了idea一个很用心的功能。
可以发http请求的插件:
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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!!
作者:Winter_Chen
链接:https://www.jianshu.com/p/1601f466fa90