SpringBoot通用分页，返回完整分页信息

返回的Json格式如下：

{
    "success": true,
    "errorCode": null,
    "errorMessage": null,
    "data": {
        "rows": [
            {
                "id": 1,
                "name": "小明",
                "age": 12,
                "sex": 1,
                "hobby": "打游戏",
                "mobile": "123456789000",
                "address": "南京"
            },
            {
                "id": 2,
                "name": "小华",
                "age": 11,
                "sex": 2,
                "hobby": "看动漫",
                "mobile": "123456789000",
                "address": "南京"
            },
			//省略
			......
        ],
        "page": 1, //当前页
        "total": 2, //总页数
        "records": 11, //总条数
        "code": null,  //返回状态码
        "message": null,//返回信息
        "size": 10 //页大小
    }
}

1.插件的Maven依赖

	com.github.pagehelper
	pagehelper-spring-boot-starter
	1.2.3

2.服务端接口

@PostMapping("/list")
@ResponseBody
public PageBaseInfo findStudentList(@RequestBody Student student,
				@RequestParam(required = false, defaultValue = "1") int page,
				@RequestParam(required = false, defaultValue = "10") int rows){
	try {
               /*
                * 分页设置
                * page:当前页码  rows:显示条数  
                */
		PageHelper.startPage(page, rows);
		List list = studentService.list(student);
		PageInfo pageInfo = new PageInfo<>(list);
		// 总条数
		int totalRow = (int) pageInfo.getTotal();
		logger.info("StudentController invoke method findStudentList is SUCCESS!! result ==> {} " + JSON.toJSONString(list));
		return new BaseResult<>(new PageBaseInfo(list,page,totalRow,rows));
	} catch (Exception e) {
		logger.error("StudentController invoke method findStudentList failed! cause : " + e);
		return new BaseResult<>(ParamReturnEnum.ERROR_MSG_SYSTEM_ERROR.getCode(), ParamReturnEnum.ERROR_MSG_SYSTEM_ERROR.getMessage());
	}
}

这里的关键是要获取记录的总条数，而非当前页显示的总条数，那个是页大小。

然后将查询到的数据和前端传来的分页数据传给PageBaseInfo，这样就返回了分页后的具体信息。

后面业务层和持久层代码就不贴了，就正常也调用逻辑就可以了，MyBatis也是正常查询语句。

下面贴出返回到前端的封装基类代码。

3.分页信息返回基类

public class PageBaseInfo {
	
	//需要显示的数据集  每页显示的数据量
	@SuppressWarnings("rawtypes")
	private List rows;
	
	//当前页
	private long page;
	
	//总页数
	private long total;
	
	//总记录数
	private long records;
	
	//反馈状态码
	private String code;
	
	//反馈信息
	private String message;
	
	private long size;
	
	//默认页面容量为20
	public final static long NO_SIZE = 20;

	
	public PageBaseInfo() {
		this.size= NO_SIZE;
	}
	
	public PageBaseInfo(List rows, long page, long records, long size) {
		this.rows = rows;//数据集合
		this.page = page;//当前页
		this.records = records;//总记录数
		this.size = size;//页面容量
		this.total = (records + this.size - 1)/this.size;//总页数
	}

	public long getSize() {
		return size;
	}

	public void setSize(long size) {
		this.size = size;
	}

	@SuppressWarnings("rawtypes")
	public List getRows() {
		return rows;
	}

	@SuppressWarnings("rawtypes")
	public void setRows(List rows) {
		this.rows = rows;
	}

	public long getPage() {
		return page;
	}

	public void setPage(long page) {
		this.page = page;
	}

	public long getTotal() {
		return total;
	}

	public void setTotal(long total) {
		this.total = total;
	}

	public long getRecords() {
		return records;
	}

	public void setRecords(long records) {
		this.records = records;
		//设置总记录数的时候同时设置总页数
		setTotal((records + this.size - 1)/this.size);
	}
	public String getCode() {
		return code;
	}

	public void setCode(String code) {
		this.code = code;
	}

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}
}