SSM+spring boot的分页和条件查询

dao层和service层 

//带条件的动态查询
    List queryEmp(@Param("deptno") Integer deptno, @Param("empname")String empname);

service实现层

@Override
    public List queryEmp(Integer deptno, String empname) {
        return empMapper.queryEmp(deptno,empname);
    }

 daoMapper.xml层

    SELECT
    dept.deptno dno,
    dept.deptname,
    dept.loc,
    emp.empno,
    emp.empname,
    emp.job,
    emp.mgr,
    emp.hiredate,
    emp.sal,
    emp.comm,
    emp.deptno eno
    FROM
    dept
    INNER JOIN emp ON emp.deptno = dept.deptno where 1=1
      
        and emp.deptno=#{deptno}
      
      
        and emp.empname like concat('%',#{empname},'%')
      
  

controller层 

@RequestMapping(value = "/queryemp.do",method = RequestMethod.GET)
    public String queryBook(@RequestParam(value = "deptno", required = false, defaultValue = "0") Integer deptno,
                            @RequestParam(value = "empname", required = false, defaultValue = "")String empname,
                            @RequestParam(value = "now", required = false, defaultValue = "1") Integer now, ModelMap map) {
        System.out.println("========分页========");
        System.out.println("姓名："+empname);
        PageHelper.startPage(now,4);
        List emps = empService.queryEmp(deptno,empname);
        for (Emp emp : emps) {
            System.out.println(emp);
        }
        PageInfo pageInfo = new PageInfo(emps);
        List dept=deptService.selectAllDept();
        map.put("depts",dept);
        map.put("pageInfo", pageInfo);
        //将条件添加到map 作为回显
        map.put("dept", deptno);
        map.put("empname", empname);
        return "index";
    }

JSP页面： 

员工管理系统

    

        部门分类
        全部
        
            selected="selected">${dept.deptname}
        
       员工姓名
     
        
    
    添加  
    批量删除
    

        
            

            

                

                
员工编号
                
员工姓名
                
岗位
                
直属领导
                
入职时间
                
工资
                
奖金
                
部门编号
                
详情
                
删除
                
修改
            
        

                    

                    
${emp.empno}
                    
${emp.empname}
                    
${emp.job}
                    
${emp.mgr}
                    
${emp.hiredate}
                    
${emp.sal}
                    
${emp.comm}
                    
${emp.dept.deptname}
                    
详情
                    
删除
                    
修改
                
            
            

                
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                    ${pageInfo.pageNum}/${pageInfo.pages}页