7、SpringBoot+Mybatis整合------PageHelper简单分页

开发工具：STS

代码下载链接：https://github.com/theIndoorTrain/SpringBoot_Mybatis/tree/1d30d2a573ce6784149a28af9b8afcab7414370c

PageHelper官方地址：https://pagehelper.github.io/

前言：

当我们操作数据库获取数据列表时，往往面对对查询数据进行分页的情况。

今天，我们使用PageHelper插件，来简单实现分页效果。

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一、Page简单使用

1.添加pom依赖：

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 4     <modelVersion>4.0.0</modelVersion>
 5 
 6     <groupId>com.xm</groupId>
 7     <artifactId>demo005_Mybatis</artifactId>
 8     <version>0.0.1-SNAPSHOT</version>
 9     <packaging>jar</packaging>
10 
11     <name>demo005_Mybatis</name>
12     <description>Demo project for Spring Boot</description>
13 
14     <parent>
15         <groupId>org.springframework.boot</groupId>
16         <artifactId>spring-boot-starter-parent</artifactId>
17         <version>2.0.2.RELEASE</version>
18         <relativePath/> <!-- lookup parent from repository -->
19     </parent>
20 
21     <properties>
22         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
23         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
24         <java.version>1.8</java.version>
25     </properties>
26 
27     <dependencies>
28         <!-- 添加PageHelper依赖 -->
29         <dependency>
30             <groupId>com.github.pagehelper</groupId>
31             <artifactId>pagehelper-spring-boot-starter</artifactId>
32             <version>1.2.3</version>
33         </dependency>
34         <dependency>
35             <groupId>org.springframework.boot</groupId>
36             <artifactId>spring-boot-starter-jdbc</artifactId>
37         </dependency>
38         <dependency>
39             <groupId>org.springframework.boot</groupId>
40             <artifactId>spring-boot-starter-web</artifactId>
41         </dependency>
42         <dependency>
43             <groupId>org.mybatis.spring.boot</groupId>
44             <artifactId>mybatis-spring-boot-starter</artifactId>
45             <version>1.3.2</version>
46         </dependency>
47 
48         <dependency>
49             <groupId>mysql</groupId>
50             <artifactId>mysql-connector-java</artifactId>
51             <scope>runtime</scope>
52         </dependency>
53         <dependency>
54             <groupId>org.springframework.boot</groupId>
55             <artifactId>spring-boot-starter-test</artifactId>
56             <scope>test</scope>
57         </dependency>
58     </dependencies>
59 
60     <build>
61         <plugins>
62             <plugin>
63                 <groupId>org.springframework.boot</groupId>
64                 <artifactId>spring-boot-maven-plugin</artifactId>
65             </plugin>
66         </plugins>
67     </build>
68 
69 
70 </project>

pom.xml

2.添加测试用例：

 1 package com.xm;
 2 
 3 import java.util.List;
 4 
 5 import org.junit.Test;
 6 import org.junit.runner.RunWith;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.boot.test.context.SpringBootTest;
 9 import org.springframework.test.context.junit4.SpringRunner;
10 
11 import com.github.pagehelper.Page;
12 import com.github.pagehelper.PageHelper;
13 import com.xm.mapper.StudentMapper;
14 import com.xm.pojo.Student;
15 
16 @RunWith(SpringRunner.class)
17 @SpringBootTest
18 public class StudentTest {
19     @Autowired
20     private StudentMapper studentMapper;
21     
22     
23     
24     @Test
25     public void pageText() {
26         Page page = PageHelper.startPage(1, 5);
27         List<Student> students = studentMapper.list();
28         for(Student student : students) {
29             System.out.println(student.toString());
30         }
31         System.out.println("当前页："+page.getPageNum());
32         System.out.println("当前页数据数："+page.getPageSize());
33         System.out.println("页总数："+page.getPages());
34         System.out.println("数据总数："+page.getCountColumn());
35         System.out.println("第3个数据详情："+page.get(2));
36     }
37     
38 
39 }

StudentTest.java

3.测试结果：

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