MyBatis分頁的簡單實現
阿新 • • 發佈:2019-01-23
使用spring+springmvc+mybatis實現簡單的分頁查詢
spring+springmvc+mybatis的整合配置就不在贅述了
1.需要下載pagehelper-3.2.1.jar
2.po層—News.java
package com.ssm.po;
import java.util.Date;
public class News {
private int id;
private int academyId;
private String title;
private Date time;
private String content;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getAcademyId() {
return academyId;
}
public void setAcademyId(int academyId) {
this.academyId = academyId;
}
public String getTitle () {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Date getTime() {
return time;
}
public void setTime(Date time) {
this.time = time;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
3.mapper層—NewsMapper.java
public List<News> listAllNews();
**4.mapper的配置檔案—NewsMapper.xm**l
<!--列出所有新聞資訊 -->
<select id="listAllNews" resultType="News">
select id,academyId,title,time,content,address from news
</select>
5.mybatis的配置資訊—sqlMapConfig.xml
在mybatis的配置中新增pagehelper的外掛配置
<plugins>
<plugin interceptor="com.github.pagehelper.PageHelper">
<!-- 設定資料庫型別 -->
<property name="dialect" value="mysql"/>
</plugin>
</plugins>
6.service層的開發—NewsService.java
public List<News> listAllNews();
7.service的實現類—NewsServiceImpl.java
@Autowired
private NewsMapper newsMapper;
@Override
public List<News> listAllNews() {
// TODO Auto-generated method stub
return newsMapper.listAllNews();
}
8.測試類的開發
private static ApplicationContext applicationContext;
private static NewsMapper newsMapper;
private static NewsService newsService;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
applicationContext = new ClassPathXmlApplicationContext(
"classpath:spring/applicationContext-dao.xml");
newsMapper = (NewsMapper) applicationContext.getBean("newsMapper");
}
// 列出所有新聞資訊
@Test
public void testListAllNews() {
PageHelper.startPage(1, 5);
List<News> listNews = newsMapper.listAllNews();
for (News news : listNews) {
System.out.println(news.getId() + "--" + news.getTime() + "---"
+ news.getAcademyId() + "--" + news.getTitle() + "--"
+ news.getContent() + "--" + news.getAddress());
}
System.out.println(listNews.size());
}
@AfterClass
public static void tearDownAfterClass() throws Exception {
}
9.測試結果
總結:上述步驟只是簡單的實現了分頁功能,而且需要手動設定頁數的大小,無法靈活的進行分頁。