mybatis的物理分页：mybatis-paginator

github上有一个专门针对mybatis的物理分页开源项目：mybatis-paginator，兼容目前绝大多数主流数据库，十分好用，下面是使用步骤：

环境：struts2 + spring + mybatis

一、pom.xml中添加依赖项

1   <dependency>
2    <groupId>com.github.miemiedevgroupId>
3    <artifactId>mybatis-paginatorartifactId>
4    <version>1.2.15version>
5   dependency>

 

二、mybatis映射文件中按常规写sql语句

 1     <select id="getFsuList" resultType="N_CA_FSU">
 2         Select t.RECID                        recId,
 3                t.GROSSWEIGHT                  grossWeight,
 4                t.TOTALGROSSWEIGHT             totalGrossWeight,

 5                t.GROSSWEIGHTUNITCODE          grossWeightUnitCode,
 6               ...
 7               
 8           From N_CA_FSU t
 9          Where ...
10     select>

如果使用mybatis-spring来整合mybatis，sqlSessionFactory参考下面修改（主要是加载分页插件）

 1     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
 2         <property name="dataSource" ref="dataSource" />
 3         <property name="configLocation" value="classpath:mybatis-config.xml">property>
 4         <property name="typeAliasesPackage" value="acc.entity">property>
 5         <property name="mapperLocations" value="classpath:mybatis/**/*.xml">property>
 6         <property name="plugins">
 7             <list>
 8                 <bean
 9                     class="com.github.miemiedev.mybatis.paginator.OffsetLimitInterceptor">
10                     <property name="dialectClass"
11                         value="com.github.miemiedev.mybatis.paginator.dialect.OracleDialect">property>
12                 bean>
13             list>
14         property>
15     bean>

 

三、服务层基类

 1 package acc.service.support;
 2 
 3 import java.io.Serializable;
 4 import java.util.List;
 5 
 6 import org.apache.ibatis.session.SqlSession;
 7 import org.apache.ibatis.session.SqlSessionFactory;
 8 import org.mybatis.spring.SqlSessionFactoryBean;
 9 import org.mybatis.spring.SqlSessionUtils;
10 import org.slf4j.Logger;
11 import org.slf4j.LoggerFactory;
12 import org.springframework.beans.factory.annotation.Autowired;
13 
14 import com.github.miemiedev.mybatis.paginator.domain.PageBounds;
15 
16 public class BaseServiceImpl implements Serializable {
17 
18     private static final long serialVersionUID = 1293567786956029903L;
19     
20     protected Logger logger = LoggerFactory.getLogger(this.getClass());
21 
22     @Autowired
23     protected SqlSessionFactoryBean sqlSessionFactory;
24 
25     /**
26      * 查询分页数据
27      * 
28      * @param mapperClass
29      * @param sqlId
30      * @param sqlParameter
31      * @param pageIndex
32      * @param pageSize
33      * @return
34      * @throws Exception
35      */
36     protected List getPageList(Class mapperClass, String sqlId,
37             Object sqlParameter, int pageIndex, int pageSize) throws Exception {
38         SqlSession session = null;
39         try {
40             SqlSessionFactory sessionFactory = sqlSessionFactory.getObject();
41             session = SqlSessionUtils.getSqlSession(sessionFactory);
42             if (pageIndex <= 0) {
43                 pageIndex = 1;
44             }
45             if (pageSize <= 0) {
46                 pageSize = 10;
47             }
48             PageBounds pageBounds = new PageBounds(pageIndex, pageSize);
49             return session.selectList(mapperClass.getName() + "." + sqlId,
50                     sqlParameter, pageBounds);
51         } finally {
52             session.close();
53         }
54 
55     }
56 
57 }

 

四、具体的服务层子类调用

 1 package acc.service.support;
 2 
 3 ...
 4 
 5 @Service
 6 public class FsuServiceImpl extends BaseServiceImpl implements FsuService {
 7 
 8     private static final long serialVersionUID = 6560424159072027262L;
 9 
10     @Autowired
11     FsuMapper fsuMapper;
12 
13     ...
14     
15 
16     @SuppressWarnings("unchecked")
17     @Override
18     public PageList getAll(int pageIndex, int pageSize)
19             throws Exception {
20         return (PageList) getPageList(FsuMapper.class, "getFsuList",
21                 null, pageIndex, pageSize);
22     }
23 
24     ...
25     
26 
27 }

服务层就处理完了，接下来看Action层

 

五、Action基类

 1 package acc.action;
 2 
 3 import org.apache.struts2.ServletActionContext;
 4 import org.apache.struts2.convention.annotation.ParentPackage;
 5 import org.slf4j.Logger;
 6 import org.slf4j.LoggerFactory;
 7 
 8 import acc.lms.invoker.utils.StringUtils;
 9 
10 import com.opensymphony.xwork2.ActionSupport;
11 
12 @ParentPackage("default")
13 public class BaseController extends ActionSupport {
14 
15     protected Logger logger = LoggerFactory.getLogger(this.getClass());
16 
17     private static final long serialVersionUID = -8955001188163866079L;
18 
19     private int pageSize = 15;
20 
21     private int pageIndex = 1;
22 
23     private int totalCounts = 0;
24     private int totalPages = 0;
25 
26     public int getPageSize() {
27         return pageSize;
28     }
29 
30     public void setPageSize(int pageSize) {
31         this.pageSize = pageSize;
32     }
33 
34     public int getPageIndex() {
35         String t = ServletActionContext.getRequest().getParameter("pageIndex");
36         if (!StringUtils.isEmpty(t)) {
37             pageIndex = Integer.parseInt(t);
38         }
39         return pageIndex;
40     }
41 
42     public int getTotalCounts() {
43         return totalCounts;
44     }
45 
46     public void setTotalCounts(int totalCounts) {
47         this.totalCounts = totalCounts;
48     }
49 
50     public int getTotalPages() {
51         return totalPages;
52     }
53 
54     public void setTotalPages(int totalPages) {
55         this.totalPages = totalPages;
56     }
57 
58 }

注：约定分页时，url类似  /xxx.action?pageIndex=N

 

六、具体的Action子类调用

 1 package acc.action;
 2 
 3 ...
 4 
 5 @Results({ @Result(name = "success", type = "redirectAction", params = {
 6         "actionName", "fsu" }) })
 7 public class FsuController extends BaseController implements
 8         ModelDriven