SpringBoot框架搭建系列(二)：整合pagehelper和mybatis-generator
阿新 • • 發佈：2018-12-11
本次我們整合mybatis的分頁外掛pagehelper，以及mapper自動生成的外掛mybatis-generator
先整合mybatis-generator
1、在pom中引入
<plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.5</version> <dependencies> <dependency> <groupId> mysql</groupId> <artifactId> mysql-connector-java</artifactId> <version> 5.1.39</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version> </dependency> </dependencies> <executions> <execution> <id>Generate MyBatis Artifacts</id> <phase>package</phase> <goals> <goal>generate</goal> </goals> </execution> </executions> <configuration> <!--允許移動生成的檔案 --> <verbose>true</verbose> <!-- 是否覆蓋 --> <overwrite>true</overwrite> <!-- 自動生成的配置 --> <configurationFile> src/main/resources/mybatis-generator.xml</configurationFile> </configuration> </plugin>
2、在resources目錄下建立檔案:mybatis-generator.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> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressDate" value="true"/> <property name="suppressAllComments" value="true"/> </commentGenerator> <!--資料庫連結地址賬號密碼--> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/mybatis" userId="root" password="streamyear"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!--生成Model類存放位置--> <javaModelGenerator targetPackage="com.streamyear.course.entity" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!--生成對映檔案存放位置--> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"> <property name="enableSubPackages" value="true"/> </sqlMapGenerator> <!--生成Dao類存放位置--> <!-- 客戶端程式碼，生成易於使用的針對Model物件和XML配置檔案 的程式碼 type="ANNOTATEDMAPPER",生成Java Model 和基於註解的Mapper物件 type="MIXEDMAPPER",生成基於註解的Java Model 和相應的Mapper物件 type="XMLMAPPER",生成SQLMap XML檔案和獨立的Mapper介面 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.streamyear.course.mapper" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> </javaClientGenerator> <!--生成對應表及類名--> <table tableName="tb_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> </context> </generatorConfiguration>
3、執行自動生成程式碼
整合分頁外掛pagehelper
1、引入依賴
<!--pagehelper --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.3</version> </dependency>
2、在配置檔案中加入分頁的配置
#pagehelper分頁外掛配置
pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql測試:
1、資料庫準備
/*
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 '使用者名稱',
`password` varchar(100) DEFAULT NULL COMMENT '密碼',
`name` varchar(100) DEFAULT NULL COMMENT '姓名',
`age` int(10) DEFAULT NULL COMMENT '年齡',
`sex` tinyint(1) DEFAULT NULL COMMENT '性別，1男性，2女性',
`birthday` date DEFAULT NULL COMMENT '出生日期',
`created` datetime DEFAULT NULL COMMENT '建立時間',
`updated` datetime DEFAULT NULL COMMENT '更新時間',
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', '張三', '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', '張偉', '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、編寫後臺的程式碼: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;
/**
* 使用者的Controller
*/
@RestController
@RequestMapping("user")
public class UserController {
/**
* 使用者的Service
*/
@Autowired
private UserService userService;
/**
* 分頁獲取所有的使用者資訊
* @param pageNum 當前頁
* @param pageSize 每頁展示的數量
* @return 使用者的list
*/
@RequestMapping("/listAllUserInfo")
public List<User> listAllUserInfo(Integer pageNum, Integer pageSize){
List<User> result = userService.listAllRecord(pageNum, pageSize);
return result;
}
}
3、其他的程式碼：service,dao可以去github上看。地址在文章的末尾
4、專案啟動，進行測試出現異常
Field userMapper in com.streamyear.course.service.impl.UserServiceImpl required a bean of type 'com.streamyear.course.mapper.UserMapper' that could not be found.解決方案:在application上面加入註解
@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、重新啟動專案,測試
備註: