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src/main/java/com/xkrs/util/PictureQuery.java

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+package com.xkrs.util;
+
+import com.xkrs.dao.PictureDao;
+import com.xkrs.model.entity.PictureEntity;
+import org.apache.http.util.TextUtils;
+import org.springframework.data.jpa.domain.Specification;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.Resource;
+import javax.persistence.criteria.Predicate;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @Author: XinYi Song
+ * @Date: 2022/1/19 13:56
+ */
+@Component
+public class PictureQuery {
+
+    @Resource
+    private PictureDao pictureDao;
+
+    /**
+     * 动态多条件查询图片信息
+     *
+     * @return
+     */
+    public List<PictureEntity> selectPicture(String lotNo, String machineNo, String materialNo, String modelNo, String machineTypeNo, String craftItemName) {
+        Specification<PictureEntity> specification = (root, criteriaQuery, criteriaBuilder) -> {
+            List<Predicate> list = new ArrayList<>();
+            if (!TextUtils.isEmpty(lotNo)) {
+                list.add(criteriaBuilder.equal(root.get("lotNo").as(String.class), lotNo));
+            }
+            if (!TextUtils.isEmpty(machineNo)) {
+                list.add(criteriaBuilder.equal(root.get("machineNo").as(String.class), machineNo));
+            }
+            if (!TextUtils.isEmpty(materialNo)) {
+                list.add(criteriaBuilder.equal(root.get("materialNo").as(String.class), materialNo));
+            }
+            if (!TextUtils.isEmpty(modelNo)) {
+                list.add(criteriaBuilder.equal(root.get("modelNo").as(String.class), modelNo));
+            }
+            if (!TextUtils.isEmpty(machineTypeNo)) {
+                list.add(criteriaBuilder.equal(root.get("machineTypeNo").as(String.class), machineTypeNo));
+            }
+            if (!TextUtils.isEmpty(craftItemName)) {
+                list.add(criteriaBuilder.equal(root.get("craftItemName").as(String.class), craftItemName));
+            }
+            Predicate[] predicates = new Predicate[list.size()];
+            return criteriaBuilder.and(list.toArray(predicates));
+        };
+        return pictureDao.findAll(specification);
+    }
+}