Mybatis系列（三）示例

1.pom.xml依賴：

<?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.example.mapper</groupId>
    <artifactId>springboot_all</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>

    <name>springboot_all</name>
    <description>Demo project for
 
 Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.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>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--spring boot aop切面-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <!--guava緩存cache-->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>23.5-jre</version>
        </dependency>
        <!--mybatis依賴-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <!--mysql依賴-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.21</version>
        </dependency>
        <!--user對象註解@Id-->
        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0.2</version>
        </dependency>
        <!--分頁插件-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>4.0.0</version>
        </dependency>
        <!--alibaba支持json轉換-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.39</version>
        </dependency>
        <!--支持redis的jedis操作-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
        <!--ehcache緩存-->
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache</artifactId>
            <version>2.10.2</version>
        </dependency>
        <!--<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-jcs-jcache</artifactId>
            <version>2.0</version>
        </dependency>-->
        <!--http依賴1-->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <!--http依賴2-->
        <dependency>
            <groupId>commons-httpclient</groupId>
            <artifactId>commons-httpclient</artifactId>
            <version>3.1</version>
        </dependency>
        <!--讀取文件配置依賴-->
        <dependency>
            <groupId>commons-configuration</groupId>
            <artifactId>commons-configuration</artifactId>
            <version>1.10</version>
        </dependency>
        <!--RabbiMQ依賴-->
        <dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>3.5.6</version>
        </dependency>
        <!--RedisTemplate依賴-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!--springboot監控依賴-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>conf</directory>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>../../conf/*
 
.properties</include>
                    <include>../../conf/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>


</project>

2.applications.properties文件：

#mysql數據庫配置
spring.datasource.url=jdbc:mysql://localhost:3306/test
 

spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

3.mybatis-config-local.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <!-- 引入外部配置文件 -->
    <properties resource="application.properties"></properties>

    <!--啟用下劃線與駝峰式命名規則的映射-->
    <settings>
        <setting name="logImpl" value="LOG4J"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

    <!--類型進行別名配置-->
    <typeAliases>
        <typeAlias alias="User" type="com.example.mapper.mybatisMap.entity.User"/>
        <package name="com.example.mapper.mybatisMap.entity" />
    </typeAliases>

    <!--通過javaType處理枚舉類型-->
    <typeHandlers>
        <typeHandler
                javaType="com.example.mapper.mybatisMap.entity.Enabled"
                handler="org.apache.ibatis.type.EnumOrdinalTypeHandler" />
    </typeHandlers>

    <!-- 配置分頁插件 -->
    <plugins>
        <plugin interceptor="com.github.pagehelper.PageHelper">
            <!-- 設置數據庫類型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種數據庫-->
            <property name="helperDialect" value="mysql"/>
        </plugin>
    </plugins>

    <!-- 配置mybatis運行環境 -->
    <environments default="master">
        <environment id="master">
            <!-- type="JDBC" 代表使用JDBC的提交和回滾來管理事務 -->
            <transactionManager type="JDBC" />
            <!-- mybatis提供了3種數據源類型，分別是：POOLED,UNPOOLED,JNDI -->
            <!-- POOLED 表示支持JDBC數據源連接池 -->
            <!-- UNPOOLED 表示不支持數據源連接池 -->
            <!-- JNDI 表示支持外部數據源連接池 -->
            <dataSource type="POOLED">
                <property name="driver" value="${spring.datasource.driver-class-name}" />
                <property name="url" value="${spring.datasource.url}" />
                <property name="username" value="${spring.datasource.username}" />
                <property name="password" value="${spring.datasource.password}" />
            </dataSource>
        </environment>
        <environment id="slave">
            <!-- type="JDBC" 代表使用JDBC的提交和回滾來管理事務 -->
            <transactionManager type="JDBC" />
            <!-- mybatis提供了3種數據源類型，分別是：POOLED,UNPOOLED,JNDI -->
            <!-- POOLED 表示支持JDBC數據源連接池 -->
            <!-- UNPOOLED 表示不支持數據源連接池 -->
            <!-- JNDI 表示支持外部數據源連接池 -->
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/user" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>


    <mappers>
        <mapper resource="dao/UserDaoMapper.xml"/>
        <mapper resource="dao/OrdersMapperCustom.xml"/>
    </mappers>
  
</configuration>

4.springboot啟動項數據庫初始化：

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.concurrent.TimeoutException;


@SpringBootApplication
public class SpringBootAll {

    private static String env = "local";
    public static SqlSessionFactory sqlSessionFactory;

        public static void main(String[] args) throws Exception{
        new  SpringBootAll().init();
        SpringApplication.run(SpringBootAll.class, args);
    }

        public void init() throws Exception{
        //初始化數據庫-單個數據庫
        initMySql();
       }

        /**
     * 單個數據庫
     */
    private void initMySql(){
        try{
            String resource = String.format("mybatis-config-%s.xml", SpringBootAll.env);
            Reader reader = Resources.getResourceAsReader(resource);
            SpringBootAll.sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

5.建立對象User:

public class User {
 
    private int id;
    private int age;
    private String name;
    private String role;
    private String email;
    private String phone;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getRole() {
        return role;
    }

    public void setRole(String role) {
        this.role = role;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", age=" + age +
                ", name=‘" + name + ‘\‘‘ +
                ", role=‘" + role + ‘\‘‘ +
                ", email=‘" + email + ‘\‘‘ +
                ", phone=‘" + phone + ‘\‘‘ +
                ‘}‘;
    }
}

6.編寫接口UserDao：

package com.example.mapper.mybatisMap.dao;

import com.example.mapper.mybatisMap.entity.User;
import org.apache.ibatis.annotations.Param;

import java.util.ArrayList;
import java.util.List;

/**
 * @author: yiqq
 * @date: 2018/7/20
 * @description:
 */
public interface UserDao {
    ArrayList<User> findInfoList(@Param("name") String name, @Param("age") int age);

    Integer findCount(@Param("name") String name, @Param("age") int age);

    String findName(User user);

    boolean insert(User user);

    List<User> selectall();

 
}

7.編寫實現類UserDaoIml:

package com.example.mapper.mybatisMap.dao;

import com.example.mapper.mybatisMap.entity.OOO;
import com.example.mapper.mybatisMap.entity.Student;
import com.example.mapper.mybatisMap.entity.User;
import com.example.mapper.mybatisMap.entity.User_c;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;

/**
 * @author: yiqq
 * @date: 2018/7/20
 * @description:
 */
public class UserDaoIml implements UserDao{
    private Logger logger = LoggerFactory.getLogger(getClass());

    private SqlSessionFactory sessionFactory;
    public UserDaoIml(SqlSessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    public ArrayList<User> findInfoList(@Param("name") String name, @Param("age") int age) {
        SqlSession sqlSession = null;
        ArrayList<User> users = new ArrayList();
        try {
            sqlSession = sessionFactory.openSession();
            UserDao mapper = sqlSession.getMapper(UserDao.class);
            users = mapper.findInfoList(name, age);
            return users;
        } catch (Exception e) {
            e.printStackTrace();
            return  users;
        }
    }

    public Integer findCount(@Param("name") String name, @Param("age") int age) {
        SqlSession sqlSession = null;
        int users =0;
        try {
            sqlSession = sessionFactory.openSession();
            UserDao mapper = sqlSession.getMapper(UserDao.class);
            users = mapper.findCount(name, age);
            return users;
        } catch (Exception e) {
            e.printStackTrace();
            return  users;
        }
    }

    public String findName(User user) {
        SqlSession sqlSession = null;
        String nameR =null;
        try {
            sqlSession = sessionFactory.openSession();
            nameR = sqlSession.selectOne("com.example.mapper.mybatisMap.dao.UserDao.findName", user);
            return nameR;
        } catch (Exception e) {
            e.printStackTrace();
            return  nameR;
        }
    }

    public boolean insert(User user) {
        SqlSession sqlSession = null;
        boolean res =false;
        try {
            sqlSession = sessionFactory.openSession();
            UserDao mapper = sqlSession.getMapper(UserDao.class);
            res = mapper.insert(user);
            if( res == true) {
                sqlSession.commit();
                res = true;
            } else {
                sqlSession.rollback();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return res;
    }

    public List<User> selectall() {
        SqlSession sqlSession = null;
        List<User> res =new ArrayList<>();
        try {
            sqlSession = sessionFactory.openSession();
            UserDao mapper = sqlSession.getMapper(UserDao.class);
            res = mapper.selectall();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return res;
    }
   

}

8.編寫UserDaoMapper:

<?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">
<!-- namespace：命名空間，對statement的信息進行分類管理 -->
<!-- 註意：在mapper代理時，它具有特殊及重要的作用 -->
<mapper namespace="com.example.mapper.mybatisMap.dao.UserDao">
    <resultMap id="UserInfo" type="com.example.mapper.mybatisMap.entity.User">
        <id column="id" property="id"/>
        <result column="age" property="age"/>
        <result column="name" property="name"/>
        <result column="role" property="role"/>
        <result column="email" property="email"/>
        <result column="phone" property="phone"/>
    </resultMap>

  
    <!--根據物品id查詢公社系統物品的配置信息-->
    <select id="findInfoList" resultType="com.example.mapper.mybatisMap.entity.User">
        SELECT id, age ,name, role, email,phone
        FROM
        user
        WHERE
        age =#{age}
        and name =#{name}
    </select>


    <select id="findCount"  resultType = "java.lang.Integer">
        SELECT COUNT(*)
        FROM
        user
        WHERE
        age =#{age}
        and name =#{name}
    </select>

    <select id="findName"  resultType = "java.lang.String">
        SELECT name
        FROM
        user
        WHERE
        age =#{age}
        and name =#{name}
    </select>

    <insert id="insert" >
        INSERT INTO USER (age, name, role, email, phone) VALUES (#{age}, #{name}, #{role}, #{email}, #{phone})
    </insert>

    <select id="selectall" resultMap="UserInfo">
        select * from user
    </select>

    

</mapper>

9.在controller中調用實現的mybatis方法：

package com.example.mapper.mybatisMap.controller;

import com.example.mapper.mybatisMap.SpringBootAll;
import com.example.mapper.mybatisMap.constant.ZKConst;
import com.example.mapper.mybatisMap.dao.UserDao;
import com.example.mapper.mybatisMap.dao.UserDaoIml;
import com.example.mapper.mybatisMap.entity.User;
import com.example.mapper.mybatisMap.tool.LocalLock;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import static com.example.mapper.mybatisMap.tool.CommonObject.*;


@RestController
public class HelloController {

    private Logger logger = LoggerFactory.getLogger(getClass());
    UserDao userDao = new UserDaoIml(SpringBootAll.sqlSessionFactory);

    /**
     * hello world 第一個程序
     * @return
     */
    @RequestMapping("/hello")
    public String hello(){
        return "Hello World!";
    }

   
    /**
     * 分頁插件,加鎖
     */
    @RequestMapping(value = "/selectallpage",produces = "application/json", method = RequestMethod.GET)
    @ResponseBody
    public List<User> SelectAllPage(HttpServletRequest request
            , HttpServletResponse response
            ,@RequestParam(value = "start",defaultValue = "1") int start
            , @RequestParam(value = "end",defaultValue = "8") int end) {
        // 獲取session，同一次運行的session都是一樣的
        String sessionId = request.getSession().getId();
        logger.debug("hhhhhhhhhhhh");
        logger.info("1111111111");
        // 獲取鎖
        LocalLock lock = new LocalLock(sessionId, String.format(ZKConst.SCORE_LOCK_NODE, 102, 123, 234));
        // 加鎖
        if(!lock.writeLock(ZKConst.LOCK_EXPIRE_TIME)){
            //log.warn("加鎖失敗！");
            return null;
        }
        PageHelper.startPage(start, end);
        List<User> userList = userDao.selectall();
        PageInfo<User> pageInfo = new PageInfo<>(userList);
        // 釋放鎖
        lock.unWriteLock();
        return pageInfo.getList();
    }

    /**
     * 返回對象
     */
    @RequestMapping(value = "/goods", method = RequestMethod.GET)
    @ResponseBody
    public ArrayList<User> GetGoodList(@RequestParam("name") String name, @RequestParam("age") int age) throws Exception{

        ArrayList<User> user = userDao.findInfoList(name, age);
        return user ;
    }

    /**
     * 返回對象，可不傳參數，使用默認參數
     */
    @RequestMapping(value = "/goodsCount", method = RequestMethod.GET)
    @ResponseBody
    public ArrayList<User> GetGoodCount(@RequestParam(value = "name",defaultValue = "易強強") String name
            , @RequestParam(value = "age", defaultValue = "27") int age) throws Exception{

        ArrayList<User> user = userDao.findInfoList(name, age);
        return user ;
    }

    /**
     * 查詢所有User
     * @return
     */
    @RequestMapping(value = "/selectall", method = RequestMethod.GET)
    @ResponseBody
    public List<User> SelectAll() {
        return userDao.selectall();
    }
   

    /**
     * mapper方式實現mybatis查詢數據庫
     * sqlSession.selectOne方式
     */
    @RequestMapping(value = "/selectone", method = RequestMethod.GET)
    @ResponseBody
    public String GetSelectOne(@RequestParam(value = "name", defaultValue = "文彪承") String name
            , @RequestParam(value = "age", defaultValue = "35") int age) throws Exception{
        User user = new User();
        user.setAge(age);
        user.setName(name);
        String names = userDao.findName(user);
        return names ;
    }
     
    /**
     * insert主鍵自增長
     * 寫入數據庫
     */
    @RequestMapping(value = "/insertC", method = RequestMethod.POST)
    @ResponseBody
    public String insert() {
        User user = new User();
        //隨機年齡
        Random rand = new Random();
        int age = rand.nextInt(20) + 20;
        user.setAge(age);
        user.setName(getChineseName());
        user.setRole(getRoad());
        user.setEmail(getEmail(6,9));
        user.setPhone(getTel());
        boolean res = userDao.insert(user);
        if(res == true) {
            return "主鍵自增長插入成功";
        }else {
            return "主鍵自增長插入失敗";
        }
    }

}

完畢！

Mybatis系列（三）示例