分别通过mongoTemplate聚合查询(带参数模糊查询)分页、Jpa查询(带参数模糊查询)分页

1、通过Jpa查询(带参数)分页

1.1)Java

/** * *方式一：基于MongoRepository *优势：方便简单，方法实现由工具类完成。 *缺点：不适合多个可变查询条件。 */
Controller
@RequestMapping("selectStudentPagerByJpa")
@ResponseBody
public Object selectStudentPagerByJpa(@RequestParam(value = "page") String page,@RequestParam(value = "rows") String rows) {
    Map<String,Object> result = new HashMap<String,Object>();
    try {
        Page<StudentBo> studentBos = studentService.queryAllByPage(Integer.parseInt(page),Integer.parseInt(rows));
        List<StudentBo> studentBoList = studentBos.getContent();
        for (StudentBo studentBo : studentBoList) {
            String courseName = null;
            List<CourseBo> courses = studentBo.getCourses();
            for (CourseBo course : courses) {
                if (StringUtils.isBlank(courseName)) {
                    courseName = course.getCname();
                } else {
                    courseName += "," + course.getCname();
                }
            }
            studentBo.setCoursesName(courseName);
        }
        result.put("total",studentBos.getTotalElements());
        result.put("rows",studentBos.getContent());
    } catch (Exception e) {
        log.error(e);
    }
    return result;
}

Service
public Page<StudentBo> queryAllByPage(int page,int rows) throws Exception {
    PageRequest pageRequest = new PageRequest(page - 1,rows,new Sort(new Sort.Order(Sort.Direction.DESC,"id")));
    return iStudentDao.findAll(pageRequest);
}

dao
@Repository
public interface IStudentDao extends MongoRepository<StudentBo,ObjectId> {
    public Page<StudentBo> findBySnameLike(String Sname,Pageable pageable);
}

带分页的模糊查询
Controller
@RequestMapping("findBySnameLike")
@ResponseBody
public Object findBySnameLike(@RequestParam(value = "page",defaultValue = "1") String page,@RequestParam(value = "rows",defaultValue = "10") String rows,@RequestParam(value = "sname") String sname) {
    Map<String,Object>();
    try {
        Page<StudentBo> studentBos = studentService.findBySnameLike(Integer.parseInt(page),Integer.parseInt(rows),sname);
        result.put("total",studentBos.getContent());
    } catch (Exception e) {
        e.printstacktrace();
    }
    return result;
}

service
public Page<StudentBo> findBySnameLike(int page,int rows,String sname) {
    Pageable pageRequest = new PageRequest(page-1,"id")));
    return iStudentDao.findBySnameLike(sname,pageRequest);
}

dao
@Repository
public interface IStudentDao extends MongoRepository<StudentBo,ObjectId> {

    public Page<StudentBo> findBySnameLike(String sname,Pageable pageRequest);
}

2、通过mongoTemplate聚合查询(带参数)分页

2.1）mongo原生查询语句

2.2）Java

/** * *方式二：通过mongoTemplate聚合查询分页 *优势：方便简单，方法实现由工具类完成。 *缺点：适合多个可变查询条件。 */
Controller
@RequestMapping("selectStudentPagerByMongoTemplate")
@ResponseBody
public Object selectStudentPagerByMongoTemplate(
       @RequestParam(value = "page") String page,@RequestParam(value = "rows") String rows,@RequestParam(value = "sname",defaultValue = "") String sname) {
   Map<String,Object>();
   try {
       //方式一：通过mongoTemplate聚合查询分页
       PagerBo pagerBo = new PagerBo(Integer.parseInt(page),Integer.parseInt(rows));
       StudentBo student = new StudentBo();
       student.setSname(sname);
       pagerBo = studentService.getStudentPagerByMongoTemplate(student,pagerBo);
       List<StudentBo> studentBoList = pagerBo.getResult();
       for (StudentBo studentBo : studentBoList) {
           String courseName = null;
           List<CourseBo> courses = studentBo.getCourses();
           for (CourseBo course : courses) {
               if (StringUtils.isBlank(courseName)) {
                   courseName = course.getCname();
               } else {
                   courseName += "," + course.getCname();
               }
           }
           studentBo.setCoursesName(courseName);
       }
       result.put("total",pagerBo.getTotal());
       result.put("rows",studentBoList);
   } catch (Exception e) {
       log.error(e);
   }
   return result;
}

Service
public PagerBo getStudentPagerByMongoTemplate(StudentBo studentBo,PagerBo pagerBo) {
    return studentDao.getStudentPagerByMongoTemplate(studentBo,pagerBo);
}

Dao
public PagerBo getStudentPagerByMongoTemplate(StudentBo studentBo,PagerBo pagerBo) {
    List<Aggregationoperation> operations = new ArrayList<Aggregationoperation>();
    operations.add(Aggregation.skip(pagerBo.getStart()));
    operations.add(Aggregation.limit(pagerBo.getRows()));
    operations.add(Aggregation.lookup("course","_id","students._id","courses"));
    operations.add(Aggregation.sort(Sort.Direction.DESC,"id"));
    if (StringUtils.hasText(studentBo.getSname())) {
        operations.add(Aggregation.match(Criteria.where("sname").
                regex(".*?\\" + studentBo.getSname() + ".*")));
    }

    Aggregation aggregation = Aggregation.newAggregation(operations);
    /*Aggregation aggregation = Aggregation.newAggregation( Aggregation.skip(pagerBo.getStart()),Aggregation.limit(pagerBo.getRows()),Aggregation.lookup("course","_id","students._id","courses"),Aggregation.sort(Sort.Direction.DESC,"id") //,Aggregation.match(Criteria.where("sname").is(studentBo.getSname())) );*/
    long total = mongoTemplate.count(new Query(),StudentBo.class);
    AggregationResults<StudentBo> results = mongoTemplate.aggregate(aggregation,"student",StudentBo.class);
    pagerBo.setResult(results.getMappedResults());
    pagerBo.setTotal(total);
    return pagerBo;
}

3.Jsp(通过easyui实现)

3.1)列表显示

<table id="dg" title="学生列表" class="easyui-datagrid" style="width:700px;height:250px" url="selectStudentPagerByMongoTemplate.do" toolbar="#toolbar" pagination="true" rownumbers="true" fitColumns="true" singleSelect="true">
    <thead>
        <tr>
            <th field="sname" width="50">学生姓名</th>
            <th field="coursesName" width="50">课程名</th>
        </tr>
    </thead>
</table>

3.2)列表查询

Jsp
<input id="sname" class="easyui-searchBox" style="width:300px" data-options="searcher:findByStudentNameLike,prompt:'请输入学生姓名'"></input>

Js
//实现方式一（）[参考地址]http://www.jeasyui.net/tutorial/22.html)
function findByStudentNameLike() {
   $('#dg').datagrid('load',{
        sname: $('#sname').val()
    });
}

//实现方式二(不推荐使用：需要重新写一个带参数的分页查询)
var sname= $('#sname').val();
$("#dg").datagrid({
    title: '用户信息',iconCls: 'icon-ok',pageSize: 10,Pagelist: [5,10,15,20],Nowrap: true,striped: true,collapsible: true,toolbar: "#easyui_toolbar",url: 'findBySnameLike.do?sname=' + sname,//触发此action,带上参数searcValue
    loadMsg: '数据加载中......',fitColumns: true,//允许表格自动缩放,以适应父容器
    sortName: 'id',sortOrder: 'asc',remoteSort: false,columns: [[{
        field: 'id',title: 'id',hidden: true
    },{
        field: 'sname',title: '学生姓名',width: '165px'
    },{
        field: 'coursesName',title: '课程名',width: '165px'
    }
    ]],pagination: true,rownumbers: true
})

个人心得：选用的方式看：是否适合多个可变查询条件。