Springboot+Mybatis+PageHelper快速實現分頁功能
阿新 • • 發佈：2019-02-01
話不多說，直接上乾貨：
pom檔案：
<?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.zhaojun</groupId> <artifactId>websocket-test</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>websocket-test</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.2.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.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.3</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.15</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.18</version> <scope>provided</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
springboot配置檔案application.yml：
pagehelper: reasonable: true support-methods-arguments: true params: count=countSql helper-dialect: mysql spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://127.0.0.1:3306/db_name?useSSL=true&characterEncoding=UTF-8 username: root password: root maxActive: 20 initialSize: 1 maxWait: 60000 minIdle: 1 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true maxOpenPreparedStatements: 20 mybatis: mapper-locations: classpath:mapper/**/*.xml
controller程式碼：
package com.zhaojun.user.controller; import com.zhaojun.user.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; /** * 使用者controller * * @author ZhaoJun */ @RestController public class UserController { @Autowired private UserService userService; @GetMapping("/users") public Object usersData(int pageNum, int pageSize) { return userService.usersData(pageNum, pageSize); } }
service:
package com.zhaojun.user.service;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.zhaojun.user.dao.UserDao;
import com.zhaojun.user.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* 使用者Service
*
* @author ZhaoJun
*/
@Service
public class UserService {
@Autowired
private UserDao userDao;
public Object usersData(int pageNum, int pageSize) {
PageHelper.startPage(pageNum,pageSize);
List<User> users = userDao.usersData();
PageInfo<User> appsPageInfo = new PageInfo<>(users);
return appsPageInfo;
}
}dao程式碼：
package com.zhaojun.user.dao;
import com.zhaojun.user.entity.User;
import java.util.List;
/**
* 使用者Dao
*
* @author ZhaoJun
*/
public interface UserDao {
List<User> usersData();
}
daoImpl程式碼：
package com.zhaojun.user.dao.impl;
import com.zhaojun.user.dao.UserDao;
import com.zhaojun.user.entity.User;
import org.apache.ibatis.session.SqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* @author ZhaoJun
*/
@Repository
public class UserDaoImpl implements UserDao {
@Autowired
private SqlSession sqlSession;
@Override
public List<User> usersData() {
return sqlSession.selectList("selectUsers");
}
}mapper檔案：
<?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.ardsec.user.dao.impl.UserDaoImpl">
<!-- 結果對映 -->
<resultMap id="userResult" type="com.zhaojun.user.entity.User" >
<id column="id" property="id" jdbcType="VARCHAR" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="login_name" property="loginName" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
<result column="tel" property="tel" jdbcType="VARCHAR" />
<result column="role" property="role" jdbcType="VARCHAR" />
<result column="org" property="org" jdbcType="VARCHAR" />
</resultMap>
<select id="selectUsers" resultMap="userResult">
SELECT * from user WHERE org IS NULL
</select>
</mapper>sql檔案：
/*
Navicat MySQL Data Transfer
Source Server : localhost
Source Server Version : 50722
Source Host : localhost:3306
Source Database : adamas
Target Server Type : MYSQL
Target Server Version : 50722
File Encoding : 65001
Date: 2018-08-16 19:00:36
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` varchar(64) NOT NULL COMMENT '主鍵id',
`login_name` varchar(200) DEFAULT NULL COMMENT '登陸賬號',
`user_name` varchar(200) DEFAULT NULL COMMENT '使用者名稱',
`password` varchar(255) DEFAULT NULL COMMENT '密碼',
`tel` varchar(64) DEFAULT NULL COMMENT '電話號碼',
`org` varchar(64) DEFAULT NULL COMMENT '機構',
`role` varchar(200) DEFAULT NULL COMMENT '角色',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='使用者表';
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1223456789', null, 'qq', null, null, null, null);
INSERT INTO `user` VALUES ('122345689', null, 'wwwwww', null, null, null, null);
INSERT INTO `user` VALUES ('12234589', null, 'eeeeeee', null, null, null, null);
INSERT INTO `user` VALUES ('1223489', null, 'rrrrrrr', null, null, null, null);
INSERT INTO `user` VALUES ('122389', null, 'ttttt', null, null, null, null);
INSERT INTO `user` VALUES ('12289', null, 'yyyyyyyyyyy', null, null, null, null);
INSERT INTO `user` VALUES ('123', null, 'uuuuuuuu', null, null, null, null);
INSERT INTO `user` VALUES ('1234', null, 'iiiiiiiiiii', null, null, null, null);
INSERT INTO `user` VALUES ('12345', null, 'aaaaaaa', null, null, null, null);
INSERT INTO `user` VALUES ('123456', null, 'sssssssss', null, null, null, null);
INSERT INTO `user` VALUES ('1234567', null, 'dddddddd', null, null, null, null);
INSERT INTO `user` VALUES ('12345678', null, 'fffffffff', null, null, null, null);
INSERT INTO `user` VALUES ('123456789', null, 'gggggggg', null, null, null, null);
INSERT INTO `user` VALUES ('1289', null, 'hhhhhhhhh', null, null, null, null);
INSERT INTO `user` VALUES ('18ce23a9027b4fe29e7a9c5b4828a20b', 'lsmife', 'lshis', '0a113ef6b61820daa5611c870ed8d5ee', '18000000000', '工商銀行', 'usual');
INSERT INTO `user` VALUES ('8197fdc71d7a4838b2d81fccdc150ac1', 'lshis', 'Mr.Li', 'b706835de79a2b4e80506f582af3676a', '18899998888', '金融集團', 'usual');
INSERT INTO `user` VALUES ('868560ec718d4cb5a969ab8ccdb54ac7', 'admin', 'admin', '123456', '15512345678', 'root', 'admin');
小夥伴們 就此結束