优化

2022-06-07 16:10:59 +08:00
parent e3843fdad8
commit 8503e7a69f
22 changed files with 434 additions and 91 deletions
@@ -127,6 +127,12 @@
            <groupId>com.alibaba</groupId>
            <artifactId>transmittable-thread-local</artifactId>
        </dependency>
+        <dependency>
+            <groupId>com.github.pagehelper</groupId>
+            <artifactId>pagehelper</artifactId>
+            <version>5.3.0</version>
+            <scope>compile</scope>
+        </dependency>

    </dependencies>

@@ -0,0 +1,98 @@
+package cn.iocoder.yudao.framework.common.page;
+
+import cn.hutool.core.bean.BeanUtil;
+import com.github.pagehelper.PageHelper;
+import com.github.pagehelper.PageInfo;
+import lombok.experimental.UtilityClass;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 分页工具类
+ *
+ * @author xggz <yyimba@qq.com>
+ * @since 2021/6/4 11:50
+ */
+@UtilityClass
+public class PageUtil<T> {
+
+    /**
+     * 转换PageHelper插件的分页数据
+     *
+     * @param pageInfo
+     * @param <T>
+     * @return
+     */
+    public <T> PageVO<T> convertPageInfo(PageInfo<T> pageInfo) {
+        return BeanUtil.copyProperties(pageInfo, PageVO.class);
+    }
+
+    /**
+     * 转换PageHelper插件的分页数据
+     *
+     * @param list
+     * @param <T>
+     * @return
+     */
+    public <T> PageVO<T> convertPageInfo(List<T> list) {
+        return BeanUtil.copyProperties(new PageInfo<T>(list), PageVO.class);
+    }
+
+    /**
+     * 复制分页数据
+     *
+     * @param sourcePage
+     * @param results
+     * @param <T>
+     * @return
+     */
+    public <T> PageVO<T> copyPage(Object sourcePage, List<T> results) {
+        PageVO<T> targetPage = BeanUtil.copyProperties(sourcePage, PageVO.class);
+        targetPage.setList(results);
+        return targetPage;
+    }
+
+    /**
+     * 返回空白的分页对象
+     *
+     * @param pageNum
+     * @param pageSize
+     * @param dataClass
+     * @param <T>
+     * @return
+     */
+    public <T> PageVO<T> emptyPage(Integer pageNum, Integer pageSize, Class<T> dataClass) {
+        PageVO page = new PageVO<>();
+        page.setPageNum(pageNum);
+        page.setPageSize(pageSize);
+        page.setSize(0);
+        page.setPages(0);
+        page.setTotal(0);
+        page.setHasNextPage(false);
+        page.setHasPreviousPage(false);
+        page.setList(new ArrayList());
+        return page;
+    }
+
+    /**
+     * 返回空白的分页对象
+     *
+     * @param pageDTO
+     * @param dataClass
+     * @param <T>
+     * @return
+     */
+    public <T> PageVO<T> emptyPage(PageDTO pageDTO, Class<T> dataClass) {
+        return emptyPage(pageDTO.getPageNum(), pageDTO.getPageSize(), dataClass);
+    }
+
+    /**
+     * 使用PageHelper设置分页参数
+     *
+     * @param pageDTO
+     */
+    public void startPage(PageDTO pageDTO) {
+        PageHelper.startPage(pageDTO.getPageNum(), pageDTO.getPageSize());
+    }
+}
@@ -0,0 +1,45 @@
+package cn.iocoder.yudao.framework.common.page;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * 分页结果
+ *
+ * @author xggz <yyimba@qq.com>
+ * @since 2021/6/4 10:53
+ */
+@Data
+@ApiModel(value = "PageVO", description = "分页结果")
+public class PageVO<T> implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    @ApiModelProperty("当前页")
+    private int pageNum;
+
+    @ApiModelProperty("每页的数量")
+    private int pageSize;
+
+    @ApiModelProperty("当前页的数量")
+    private int size;
+
+    @ApiModelProperty("总页数")
+    private int pages;
+
+    @ApiModelProperty("是否有前一页")
+    private boolean hasPreviousPage = false;
+
+    @ApiModelProperty("是否有后一页")
+    private boolean hasNextPage = false;
+
+    @ApiModelProperty("总记录数")
+    private long total;
+
+    @ApiModelProperty("结果集")
+    private List<T> list;
+}