SpringBoot框架搭建系列(二)：整合pagehelper和mybatis-generator

本次我们整合mybatis的分页插件pagehelper，以及mapper自动生成的插件mybatis-generator

先整合mybatis-generator

1、在pom中引入

                org.mybatis.generator
                mybatis-generator-maven-plugin
                1.3.5
                
                    
                         mysql
                         mysql-connector-java
                         5.1.39
                    
                    
                        org.mybatis.generator
                        mybatis-generator-core
                        1.3.5
                    
                
                
                    
                        Generate MyBatis Artifacts
                        package
                        
                            generate
                        
                    
                
                
                    
                    true
                    
                    true
                    
                    
                        src/main/resources/mybatis-generator.xml
                
            

2、在resources目录下创建文件:mybatis-generator.xml

3、执行自动生成代码

整合分页插件pagehelper

1、引入依赖

        
            com.github.pagehelper
            pagehelper-spring-boot-starter
            1.2.3
        

2、在配置文件中加入分页的配置

#pagehelper分页插件配置
pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql

测试:

1、数据库准备

/*
Navicat MySQL Data Transfer

Source Server         : www.streamyear.com
Source Server Version : 50711
Source Host           : www.streamyear.com:3306
Source Database       : mybatis

Target Server Type    : MYSQL
Target Server Version : 50711
File Encoding         : 65001

Date: 2018-09-24 10:54:59
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for tb_user
-- ----------------------------
DROP TABLE IF EXISTS `tb_user`;
CREATE TABLE `tb_user` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(100) DEFAULT NULL COMMENT '用户名',
  `password` varchar(100) DEFAULT NULL COMMENT '密码',
  `name` varchar(100) DEFAULT NULL COMMENT '姓名',
  `age` int(10) DEFAULT NULL COMMENT '年龄',
  `sex` tinyint(1) DEFAULT NULL COMMENT '性别，1男性，2女性',
  `birthday` date DEFAULT NULL COMMENT '出生日期',
  `created` datetime DEFAULT NULL COMMENT '创建时间',
  `updated` datetime DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`user_name`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tb_user
-- ----------------------------
INSERT INTO `tb_user` VALUES ('1', 'zhangsan', '123456', '张三', '30', '1', '1984-08-08', '2014-09-19 16:56:04', '2014-09-21 11:24:59');
INSERT INTO `tb_user` VALUES ('2', 'lisi', '123456', '李四', '21', '2', '1991-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('3', 'wangwu', '123456', '王五', '22', '2', '1989-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('4', 'zhangwei', '123456', '张伟', '20', '1', '1988-09-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('5', 'lina', '123456', '李娜', '28', '1', '1985-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('6', 'lilei', '123456', '李磊', '23', '1', '1988-08-08', '2014-09-20 11:41:15', '2014-09-20 11:41:15');

2、编写后台的代码:controller

package com.streamyear.course.controller;

import com.streamyear.course.entity.User;
import com.streamyear.course.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * 用户的Controller
 */
@RestController
@RequestMapping("user")
public class UserController {

    /**
     * 用户的Service
     */
    @Autowired
    private UserService userService;

    /**
     * 分页获取所有的用户信息
     * @param pageNum 当前页
     * @param pageSize 每页展示的数量
     * @return 用户的list
     */
    @RequestMapping("/listAllUserInfo")
    public List listAllUserInfo(Integer pageNum, Integer pageSize){
        List result = userService.listAllRecord(pageNum, pageSize);
        return result;
    }
}

3、其他的代码：service,dao可以去github上看。地址在文章的末尾

4、项目启动，进行测试出现异常

Field userMapper in com.streamyear.course.service.impl.UserServiceImpl required a bean of type 'com.streamyear.course.mapper.UserMapper' that could not be found.

解决方案:在application上面加入注解

@MapperScan(basePackages = {"com.streamyear.course.mapper"})

package com.streamyear.course;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan(basePackages = {"com.streamyear.course.mapper"})
public class CourseApplication {

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

5、重新启动项目,测试

备注:

项目的代码的地址:https://github.com/streamyear/course.git