Springboot+jpa实现分页

Springboot+jpa实现分页

一.Repository

public interface ProductRepository extends CrudRepository<Product,String> {
    List<Product> findByName(String name);
    Optional<Product> findById(String id);

    Iterable<Product> findAll(Sort sort);
    Page<Product> findAll(Pageable pageable);
}

二.Service

@Service
public class ProductService {
    @Resource
    ProductRepository pr;

    public Iterable<Product> findall(Pageable pageable) {
        return pr.findAll(pageable);
    }

    public List<Product> findByName(String name) {
        return pr.findByName(name);
    }
    public Optional<Product> findById(String id){
        return pr.findById(id);
    }

    public Product save(Product product){
        return pr.save(product);
    }
    public void deleteById(String id){
        pr.deleteById(id);
    }
}

三.Controller

    @RequestMapping("showall/{page}")
    public Iterable<Product> findall(@PathVariable("page") String page) {
        Pageable pageable = new PageRequest(Integer.parseInt(page),3);
        Iterable<Product> ip = ps.findall(pageable);
        return ip;
    }

四.JS

function getdata() {
        $.getJSON("product/showall/" + page, function (json) {
            console.log(page);
            if (page < json.pageable.pageSize) {
                console.log(json);
                $("#tbodymainbtn").empty();
                for (var i = 0; i < json.content.length; i++) {
                    $("#tbodymainbtn").append(
                        ""
                        + "" + json.content[i].id
                        + ""
                        + "" + json.content[i].name
                        + ""
                        + "" + json.content[i].category
                        + ""
                        + "" + json.content[i].productiondate
                        + ""
                        + "" + json.content[i].outdate
                        + ""
                        + "" + json.content[i].price
                        + ""
                        + "" + json.content[i].amount
                        + ""
                        + ""
                    );
                }
            }


            var pagenum = json.totalPages;
            $(".pagination").empty();

            $(".pagination").append('
Previous
');
            for (var j = 0; j < pagenum; j++) {
                $(".pagination").append(' 
+ j + '">' + (j + 1) + '
');
            }
            $(".pagination").append(' 
Next
');

            $(".page-item").removeClass("active");
            $("#page" + page).addClass("active");
            $("#nextpage").click(function () {
                if (page <= pagenum - 1) {
                    page = page + 1;
                    console.log(page);
                    getdata();
                }
            })


            $("#previosepage").click(function () {
                if (page >= 1) {
                    page = page - 1;
                    console.log(page);

                    getdata();
                }

            })


            $(".page-item").click(function () {
                page = this.id.substr(4);
                getdata();
            })
        })
    }