先看一下返回的JSON資料：

{
    "pagNum": 1,
    "pageSize": 5,
    "totalRecord": 12,
    "totalPage": 3,
    "startIndex": 0,
    "dateList": [
        {
            "employee_id": 2,
            "employee_account": "44",
            "username": "44",
            "password": "44",
            "age": 44,
            "address
 
": "0000",
            "departmentname": "生產技術部"
        },
        {
            "employee_id": 3,
            "employee_account": "44",
            "username": "44",
            "password": "44",
            "age": 44,
            "address": "0000",
            "departmentname": "生產技術部"
        },
        {
            "employee_id
 
": 4,
            "employee_account": "897",
            "username": "張紅",
            "password": "0989",
            "age": 45,
            "address": "河北省石家莊市公園路45號",
            "departmentname": "系統服務部"
        },
        {
            "employee_id": 6,
            "employee_account": "6767",
            "username
 
": "龍飛",
            "password": "9889789",
            "age": 24,
            "address": "江蘇省南京市人民路88號",
            "departmentname": "廣告部"
        },
        {
            "employee_id": 10,
            "employee_account": "11111111",
            "username": "測試一",
            "password": "1111111",
            "age": 11111,
            "address": "四川成都市",
            "departmentname": "廣告部"
        }
    ],
    "start": 1,
    "end": 3
}

所用到的幾個類：
* Employee.java：實體類
* Page.java：分頁類
* EmployeeDao.java：持久層介面
* EmployeeMapping.xml：資料庫對映檔案
* EmployeeService.java：服務層介面
* EmployeeServiceImpl.java：服務層介面實現類
* EmployeeController.java：控制器類

起主要作用的是Page類:

    private int pagNum;// 當前的頁數
    private int pageSize;// 每頁顯示數量，limit函式第二個引數
    private int totalRecord;// 總記錄數
    private int totalPage;// 總頁數
    private int startIndex;// 開始位置，limit函式第一個引數
    private List<T> dateList;
    private int start;
    private int end;

    public Page() {
    }

    public Page(int pagNum, int pageSize, int totalRecord) {
        this.pagNum = pagNum;
        this.pageSize = pageSize;
        this.totalRecord = totalRecord;
        // 計算總頁數
        if (totalRecord % pageSize == 0) {
            this.totalPage = totalRecord / pageSize;
        } else {
            this.totalPage = (totalRecord / pageSize) + 1;
        }
        // 確定limit函式的第一個引數的值
        this.startIndex = pagNum * pageSize;
        this.start = 1;
        this.end = 5;
        if (totalPage <= 5) {
            this.end = this.totalPage;
        } else {// pagNum=6;start=4;end=8
            this.start = pagNum - 2;
            this.end = pagNum + 2;
        }
        if (start < 0) {
            this.start = 1;
            this.end = 5;
        }
        // 舉個例子：一共有10頁，現在就在第10頁，那麼根據上面的邏輯end=12，錯誤；則end=this.totalPage;且下面導航欄還是要出現5個，則start=end-5
        if (end > this.totalPage) {
            this.end = totalPage;
            this.start = end - 5;
        }
    }

從資料庫獲取相關資訊：

• dao介面：

public interface EmployeeDao {
    //獲取資料的總條數，即totalRecord
    int getEmployeeTotal();
    //獲取指定的資料
    List<Employee> getAllEmployee(Page<Employee> page);
}

• mapping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.example.oa.dao.EmployeeDao">
    <select id="getEmployeeTotal" resultType="java.lang.Integer">
        SELECT COUNT(1) FROM
        employee
    </select>
    <select id="getAllEmployee"
        resultType="com.example.oa.domain.Employee"
        parameterType="com.example.oa.domain.Page">
        SELECT
        e.employee_id,
        e.employee_account,
        e.username,
        e.`password`,
        e.age,
        e.address,
        d.departmentname
        FROM
        employee e,
        department d
        WHERE
        e.departmentid = d.departmentid LIMIT
        #{startIndex},#{pageSize}
    </select>
</mapper>

• service層介面：

public interface EmployeeService {
    //返回分頁資料和主題資訊
    Page<Employee> getEmployee(Page<Employee> page);
}

• service實現類：

@Service
public class EmployeeServiceImpl implements EmployeeService {
    @Autowired
    private EmployeeDao employeeDao;
    private Logger log = Logger.getLogger(EmployeeServiceImpl.class);

    @Override
    public Page<Employee> getEmployee(Page<Employee> page) {
        //獲取總條數，即totalRecord
        int total = employeeDao.getEmployeeTotal();
        Page<Employee> allpage = new Page<Employee>(page.getPagNum(), page.getPageSize(), total);
        log.info("allpage:" + allpage.toString());
        //將獲取到的集合資料，新增到page中的datalist引數中
        allpage.setDateList(employeeDao.getAllEmployee(allpage));
        //返回所有的分頁引數和資料
        return allpage;
    }

}

• 控制層：

@Controller
@RequestMapping(value = "/employeeController")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    @RequestMapping(value = "/getAll")
    @ResponseBody
    public Page<Employee> getAll(Page<Employee> page) {
        Page<Employee> page1 = employeeService.getEmployee(page);
        return page1;
    }
}

• 資料表的話，自己建一張表就行了（以下是我的SQL）

CREATE TABLE `employee` (
  `employee_id` int(11) NOT NULL AUTO_INCREMENT,
  `employee_account` varchar(255) NOT NULL,
  `username` varchar(50) NOT NULL,
  `password` varchar(100) NOT NULL,
  `age` int(11) DEFAULT NULL,
  `address` varchar(255) DEFAULT NULL,
  `departmentid` int(11) DEFAULT NULL,
  `role` int(3) NOT NULL,
  PRIMARY KEY (`employee_id`),
  KEY `departmentid` (`departmentid`) USING BTREE,
  CONSTRAINT `employee_ibfk_1` FOREIGN KEY (`departmentid`) REFERENCES `department` (`departmentid`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=18 DEFAULT CHARSET=utf8 COMMENT='員工表';

至此，SSM框架的分頁功能實現完成。完整程式碼以上傳到碼雲，有需要請下載：Paging

參考博文：