spring mvc+mybatis+mysql+maven+bootstrap-table整合实现增删查改简单实例的代码详情-代码-最代码

首页>代码>spring mvc+mybatis+mysql+maven+bootstrap-table整合实现增删查改简单实例>/demo-bstable/src/main/java/com/xe/demo/common/pojo/PageAjax.java
001package com.xe.demo.common.pojo;
002 
003import java.io.Serializable;
004import java.util.Collection;
005import java.util.List;
006 
007import com.github.pagehelper.Page;
008 
009/**
010 * 封装分页请求结果
011 * @author CZH
012 */
013@SuppressWarnings({"rawtypes", "unchecked"})
014public class PageAjax<T> implements Serializable {
015    private static final long serialVersionUID = 1L;
016    /**当前页*/
017    private int pageNo;
018    /**每页的数量*/
019    private int pageSize;
020    /**当前页的数量*/
021    private int size;
022    /**排序*/
023    private String orderBy;
024    /**当前页面第一个元素在数据库中的行号*/
025    private int startRow;
026    /**当前页面最后一个元素在数据库中的行号*/
027    private int endRow;
028    /**总记录数*/
029    private long total;
030    /**总页数*/
031    private int pages;
032    /**结果集*/
033    private List<T> rows;
034    /**第一页*/
035    private int firstPage;
036    /**前一页*/
037    private int prePage;
038    /**下一页*/
039    private int nextPage;
040    /**最后一页*/
041    private int lastPage;
042    /**是否为第一页*/
043    private boolean isFirstPage = false;
044    /**是否为最后一页*/
045    private boolean isLastPage = false;
046    /**是否有前一页*/
047    private boolean hasPreviousPage = false;
048    /**是否有下一页*/
049    private boolean hasNextPage = false;
050    /**导航页码数*/
051    private int navigatePages;
052    /**所有导航页号*/
053    private int[] navigatepageNums;
054 
055    public PageAjax() {
056    }
057 
058    /**
059     * 包装Page对象
060     * @param list
061     */
062    public PageAjax(List<T> list) {
063        this(list, 8);
064    }
065 
066    /**
067     * 包装Page对象
068     * @param list page结果
069     * @param navigatePages 页码数量
070     */
071    public PageAjax(List<T> list, int navigatePages) {
072        if (list instanceof Page) {
073            Page page = (Page) list;
074            this.pageNo = page.getPageNum();
075            this.pageSize = page.getPageSize();
076//            this.orderBy = page.getOrderBy();
077 
078            this.pages = page.getPages();
079            this.rows = page;
080            this.size = page.size();
081            this.total = page.getTotal();
082            //由于结果是>startRow的，所以实际的需要+1
083            if (this.size == 0) {
084                this.startRow = 0;
085                this.endRow = 0;
086            } else {
087                this.startRow = page.getStartRow() + 1;
088                //计算实际的endRow（最后一页的时候特殊）
089                this.endRow = this.startRow - 1 + this.size;
090            }
091        } else if (list instanceof Collection) {
092            this.pageNo = 1;
093            this.pageSize = list.size();
094 
095            this.pages = 1;
096            this.rows = list;
097            this.size = list.size();
098            this.total = list.size();
099            this.startRow = 0;
100            this.endRow = list.size() > 0 ? list.size() - 1 : 0;
101        }
102        if (list instanceof Collection) {
103            this.navigatePages = navigatePages;
104            //计算导航页
105            calcNavigatepageNums();
106            //计算前后页，第一页，最后一页
107            calcPage();
108            //判断页面边界
109            judgePageBoudary();
110        }
111    }
112 
113    /**
114     * 计算导航页
115     */
116    private void calcNavigatepageNums() {
117        //当总页数小于或等于导航页码数时
118        if (pages <= navigatePages) {
119            navigatepageNums = new int[pages];
120            for (int i = 0; i < pages; i++) {
121                navigatepageNums[i] = i + 1;
122            }
123        } else { //当总页数大于导航页码数时
124            navigatepageNums = new int[navigatePages];
125            int startNum = pageNo - navigatePages / 2;
126            int endNum = pageNo + navigatePages / 2;
127 
128            if (startNum < 1) {
129                startNum = 1;
130                //(最前navigatePages页
131                for (int i = 0; i < navigatePages; i++) {
132                    navigatepageNums[i] = startNum++;
133                }
134            } else if (endNum > pages) {
135                endNum = pages;
136                //最后navigatePages页
137                for (int i = navigatePages - 1; i >= 0; i--) {
138                    navigatepageNums[i] = endNum--;
139                }
140            } else {
141                //所有中间页
142                for (int i = 0; i < navigatePages; i++) {
143                    navigatepageNums[i] = startNum++;
144                }
145            }
146        }
147    }
148 
149    /**
150     * 计算前后页，第一页，最后一页
151     */
152    private void calcPage() {
153        if (navigatepageNums != null && navigatepageNums.length > 0) {
154            firstPage = navigatepageNums[0];
155            lastPage = navigatepageNums[navigatepageNums.length - 1];
156            if (pageNo > 1) {
157                prePage = pageNo - 1;
158            }
159            if (pageNo < pages) {
160                nextPage = pageNo + 1;
161            }
162        }
163    }
164 
165    /**
166     * 判定页面边界
167     */
168    private void judgePageBoudary() {
169        isFirstPage = pageNo == 1;
170        isLastPage = pageNo == pages;
171        hasPreviousPage = pageNo > 1;
172        hasNextPage = pageNo < pages;
173    }
174 
175    public int getPageNo() {
176        return pageNo;
177    }
178 
179    public void setPageNo(int pageNo) {
180        this.pageNo = pageNo;
181    }
182 
183    public int getPageSize() {
184        return pageSize;
185    }
186 
187    public void setPageSize(int pageSize) {
188        this.pageSize = pageSize;
189    }
190 
191    public int getSize() {
192        return size;
193    }
194 
195    public void setSize(int size) {
196        this.size = size;
197    }
198 
199    public String getOrderBy() {
200        return orderBy;
201    }
202 
203    public void setOrderBy(String orderBy) {
204        this.orderBy = orderBy;
205    }
206 
207    public int getStartRow() {
208        return startRow;
209    }
210 
211    public void setStartRow(int startRow) {
212        this.startRow = startRow;
213    }
214 
215    public int getEndRow() {
216        return endRow;
217    }
218 
219    public void setEndRow(int endRow) {
220        this.endRow = endRow;
221    }
222 
223    public long getTotal() {
224        return total;
225    }
226 
227    public void setTotal(long total) {
228        this.total = total;
229    }
230 
231    public int getPages() {
232        return pages;
233    }
234 
235    public void setPages(int pages) {
236        this.pages = pages;
237    }
238 
239    public List<T> getRows() {
240        return rows;
241    }
242 
243    public void setRows(List<T> rows) {
244        this.rows = rows;
245    }
246 
247    public int getFirstPage() {
248        return firstPage;
249    }
250 
251    public void setFirstPage(int firstPage) {
252        this.firstPage = firstPage;
253    }
254 
255    public int getPrePage() {
256        return prePage;
257    }
258 
259    public void setPrePage(int prePage) {
260        this.prePage = prePage;
261    }
262 
263    public int getNextPage() {
264        return nextPage;
265    }
266 
267    public void setNextPage(int nextPage) {
268        this.nextPage = nextPage;
269    }
270 
271    public int getLastPage() {
272        return lastPage;
273    }
274 
275    public void setLastPage(int lastPage) {
276        this.lastPage = lastPage;
277    }
278 
279    public boolean isIsFirstPage() {
280        return isFirstPage;
281    }
282 
283    public void setIsFirstPage(boolean isFirstPage) {
284        this.isFirstPage = isFirstPage;
285    }
286 
287    public boolean isIsLastPage() {
288        return isLastPage;
289    }
290 
291    public void setIsLastPage(boolean isLastPage) {
292        this.isLastPage = isLastPage;
293    }
294 
295    public boolean isHasPreviousPage() {
296        return hasPreviousPage;
297    }
298 
299    public void setHasPreviousPage(boolean hasPreviousPage) {
300        this.hasPreviousPage = hasPreviousPage;
301    }
302 
303    public boolean isHasNextPage() {
304        return hasNextPage;
305    }
306 
307    public void setHasNextPage(boolean hasNextPage) {
308        this.hasNextPage = hasNextPage;
309    }
310 
311    public int getNavigatePages() {
312        return navigatePages;
313    }
314 
315    public void setNavigatePages(int navigatePages) {
316        this.navigatePages = navigatePages;
317    }
318 
319    public int[] getNavigatepageNums() {
320        return navigatepageNums;
321    }
322 
323    public void setNavigatepageNums(int[] navigatepageNums) {
324        this.navigatepageNums = navigatepageNums;
325    }
326 
327    @Override
328    public String toString() {
329        final StringBuffer sb = new StringBuffer("PageAjax{");
330        sb.append(" pageNo=").append(pageNo);
331        sb.append(", pageSize=").append(pageSize);
332        sb.append(", size=").append(size);
333        sb.append(", startRow=").append(startRow);
334        sb.append(", endRow=").append(endRow);
335        sb.append(", total=").append(total);
336        sb.append(", pages=").append(pages);
337        sb.append(", rows=").append(rows);
338        sb.append(", firstPage=").append(firstPage);
339        sb.append(", prePage=").append(prePage);
340        sb.append(", nextPage=").append(nextPage);
341        sb.append(", lastPage=").append(lastPage);
342        sb.append(", isFirstPage=").append(isFirstPage);
343        sb.append(", isLastPage=").append(isLastPage);
344        sb.append(", hasPreviousPage=").append(hasPreviousPage);
345        sb.append(", hasNextPage=").append(hasNextPage);
346        sb.append(", navigatePages=").append(navigatePages);
347        sb.append(", navigatepageNums=");
348        if (navigatepageNums == null) sb.append("null");
349        else {
350            sb.append('[');
351            for (int i = 0; i < navigatepageNums.length; ++i)
352                sb.append(i == 0 ? "" : ", ").append(navigatepageNums[i]);
353            sb.append(']');
354        }
355        sb.append('}');
356        return sb.toString();
357    }
358}