數組分頁
查詢出全部數據，然后再list中截取需要的部分。
mybatis接口
List<Student> queryStudentsByArray();
xml配置文件
<select id="queryStudentsByArray" resultMap="studentmapper"> select * from student </select>
service
接口
List<Student> queryStudentsByArray(int currPage, int pageSize); 實現接口 @Override public List<Student> queryStudentsByArray(int currPage, int pageSize) { //查詢全部數據 List<Student> students = studentMapper.queryStudentsByArray(); //從第幾條數據開始 int firstIndex = (currPage - 1) * pageSize; //到第幾條數據結束 int lastIndex = currPage * pageSize; return students.subList(firstIndex, lastIndex); //直接在list中截取 }
controller
@ResponseBody
@RequestMapping("/student/array/{currPage}/{pageSize}") public List<Student> getStudentByArray(@PathVariable("currPage") int currPage, @PathVariable("pageSize") int pageSize) { List<Student> student = StuServiceIml.queryStudentsByArray(currPage, pageSize); return student; }
sql分頁
mybatis接口
List<Student> queryStudentsBySql(Map<String,Object> data);
xml文件
<select id="queryStudentsBySql" parameterType="map" resultMap="studentmapper"> select * from student limit #{currIndex} , #{pageSize} </select>
service
接口
List<Student> queryStudentsBySql(int currPage, int pageSize); 實現類 public List<Student> queryStudentsBySql(int currPage, int pageSize) { Map<String, Object> data = new HashedMap(); data.put("currIndex", (currPage-1)*pageSize); data.put("pageSize", pageSize); return studentMapper.queryStudentsBySql(data); }
攔截器分頁
創建攔截器，攔截mybatis接口方法id以ByPage結束的語句
package com.autumn.interceptor; import org.apache.ibatis.executor.Executor; import org.apache.ibatis.executor.parameter.ParameterHandler; import org.apache.ibatis.executor.resultset.ResultSetHandler; import org.apache.ibatis.executor.statement.StatementHandler; import org.apache.ibatis.mapping.MappedStatement; import org.apache.ibatis.plugin.*; import org.apache.ibatis.reflection.MetaObject; import org.apache.ibatis.reflection.SystemMetaObject; import java.sql.Connection; import java.util.Map; import java.util.Properties; /** * @Intercepts 說明是一個攔截器 * @Signature 攔截器的簽名 * type 攔截的類型 四大對象之一( Executor,ResultSetHandler,ParameterHandler,StatementHandler) * method 攔截的方法 * args 參數,高版本需要加個Integer.class參數,不然會報錯 */ @Intercepts({@Signature(type = StatementHandler.class, method = "prepare", args = {Connection.class})}) public class MyPageInterceptor implements Interceptor { //每頁顯示的條目數 private int pageSize; //當前現實的頁數 private int currPage; //數據庫類型 private String dbType; @Override public Object intercept(Invocation invocation) throws Throwable { //獲取StatementHandler，默認是RoutingStatementHandler StatementHandler statementHandler = (StatementHandler) invocation.getTarget(); //獲取statementHandler包裝類 MetaObject MetaObjectHandler = SystemMetaObject.forObject(statementHandler); //分離代理對象鏈 while (MetaObjectHandler.hasGetter("h")) { Object obj = MetaObjectHandler.getValue("h"); MetaObjectHandler = SystemMetaObject.forObject(obj); } while (MetaObjectHandler.hasGetter("target")) { Object obj = MetaObjectHandler.getValue("target"); MetaObjectHandler = SystemMetaObject.forObject(obj); } //獲取連接對象 //Connection connection = (Connection) invocation.getArgs()[0]; //object.getValue("delegate"); 獲取StatementHandler的實現類 //獲取查詢接口映射的相關信息 MappedStatement mappedStatement = (MappedStatement) MetaObjectHandler.getValue("delegate.mappedStatement"); String mapId = mappedStatement.getId(); //statementHandler.getBoundSql().getParameterObject(); //攔截以.ByPage結尾的請求，分頁功能的統一實現 if (mapId.matches(".+ByPage$")) { //獲取進行數據庫操作時管理參數的handler ParameterHandler parameterHandler = (ParameterHandler) MetaObjectHandler.getValue("delegate.parameterHandler"); //獲取請求時的參數 Map<String, Object> paraObject = (Map<String, Object>) parameterHandler.getParameterObject(); //也可以這樣獲取 //paraObject = (Map<String, Object>) statementHandler.getBoundSql().getParameterObject(); //參數名稱和在service中設置到map中的名稱一致 currPage = (int) paraObject.get("currPage"); pageSize = (int) paraObject.get("pageSize"); String sql = (String) MetaObjectHandler.getValue("delegate.boundSql.sql"); //也可以通過statementHandler直接獲取 //sql = statementHandler.getBoundSql().getSql(); //構建分頁功能的sql語句 String limitSql; sql = sql.trim(); limitSql = sql + " limit " + (currPage - 1) * pageSize + "," + pageSize; //將構建完成的分頁sql語句賦值個體'delegate.boundSql.sql'，偷天換日 MetaObjectHandler.setValue("delegate.boundSql.sql", limitSql); } //調用原對象的方法，進入責任鏈的下一級 return invocation.proceed(); } //獲取代理對象 @Override public Object plugin(Object o) { //生成object對象的動態代理對象 return Plugin.wrap(o, this); } //設置代理對象的參數 @Override public void setProperties(Properties properties) { //如果項目中分頁的pageSize是統一的，也可以在這里統一配置和獲取，這樣就不用每次請求都傳遞pageSize參數了。參數是在配置攔截器時配置的。 String limit1 = properties.getProperty("limit", "10"); this.pageSize = Integer.valueOf(limit1); this.dbType = properties.getProperty("dbType", "mysql"); } }
配置文件SqlMapConfig.xml
<configuration> <plugins> <plugin interceptor="com.autumn.interceptor.MyPageInterceptor"> <property name="limit" value="10"/> <property name="dbType" value="mysql"/> </plugin> </plugins> </configuration>
mybatis配置
<!--接口--> List<AccountExt> getAllBookByPage(@Param("currPage")Integer pageNo,@Param("pageSize")Integer pageSize); <!--xml配置文件--> <sql id="getAllBooksql" > acc.id, acc.cateCode, cate_name, user_id,u.name as user_name, money, remark, time </sql> <select id="getAllBook" resultType="com.autumn.pojo.AccountExt" > select <include refid="getAllBooksql" /> from account as acc </select>
service
public List<AccountExt> getAllBookByPage(String pageNo,String pageSize) { return accountMapper.getAllBookByPage(Integer.parseInt(pageNo),Integer.parseInt(pageSize)); }
controller
@RequestMapping("/getAllBook")
@ResponseBody
public Page getAllBook(String pageNo,String pageSize,HttpServletRequest request,HttpServletResponse response){ pageNo=pageNo==null?"1":pageNo; //當前頁碼 pageSize=pageSize==null?"5":pageSize; //頁面大小 //獲取當前頁數據 List<AccountExt> list = bookService.getAllBookByPage(pageNo,pageSize); //獲取總數據大小 int totals = bookService.getAllBook(); //封裝返回結果 Page page = new Page(); page.setTotal(totals+""); page.setRows(list); return page; }
Page實體類
package com.autumn.pojo; import java.util.List; /** * Created by Autumn on 2018/6/21. */ public class Page { private String pageNo = null; private String pageSize = null; private String total = null; private List rows = null; public String getTotal() { return total; } public void setTotal(String total) { this.total = total; } public List getRows() { return rows; } public void setRows(List rows) { this.rows = rows; } public String getPageNo() { return pageNo; } public void setPageNo(String pageNo) { this.pageNo = pageNo; } public String getPageSize() { return pageSize; } public void setPageSize(String pageSize) { this.pageSize = pageSize; } }
前端
bootstrap-table接受數據格式
{
"total": 3, "rows": [ { "id": 0, "name": "Item 0", "price": "$0" }, { "id": 1, "name": "Item 1", "price": "$1" } ] }
boostrap-table用法
var $table = $('#table'); $table.bootstrapTable({ url: "/${appName}/manager/bookController/getAllBook", method: 'post', contentType: "application/x-www-form-urlencoded", dataType: "json", pagination: true, //分頁 sidePagination: "server", //服務端處理分頁 pageList: [5, 10, 25], pageSize: 5, pageNumber:1, //toolbar:"#tb", singleSelect: false, queryParamsType : "limit", queryParams: function queryParams(params) { //設置查詢參數 var param = { pageNo: params.offset/params.limit+1, //offset為數據開始索引,轉換為顯示當前頁 pageSize: params.limit //頁面大小 }; console.info(params); //查看參數是什么 console.info(param); //查看自定義的參數 return param; }, cache: false, //data-locale: "zh-CN", //表格漢化 //search: true, //顯示搜索框 columns: [ { checkbox: true }, { title: '消費類型', field: 'cate_name', valign: 'middle' }, { title: '消費金額', field: 'money', valign: 'middle', formatter:function(value,row,index){ if(!isNaN(value)){ //是數字 return value/100; } } }, { title: '備注', field: 'remark', valign: 'middle' }, { title: '消費時間', field: 'time', valign: 'middle' }, { title: '操作', field: '', formatter:function(value,row,index){ var f = '<a href="#" class="btn btn-gmtx-define1" onclick="delBook(\''+ row.id +'\')">刪除</a> '; return f; } } ] }); });
RowBounds分頁
數據量小時，RowBounds不失為一種好辦法。但是數據量大時，實現攔截器就很有必要了。
mybatis接口加入RowBounds參數
public List<UserBean> queryUsersByPage(String userName, RowBounds rowBounds);
service
@Override
@Transactional(isolation = Isolation.READ_COMMITTED, propagation = Propagation.SUPPORTS) public List<RoleBean> queryRolesByPage(String roleName, int start, int limit) { return roleDao.queryRolesByPage(roleName, new RowBounds(start, limit)); }