运费模板，区域选择使用懒加载优化性能

yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/controller/admin/ip/AreaController.java

@@ -6,18 +6,18 @@ import cn.iocoder.yudao.framework.ip.core.Area;
 import cn.iocoder.yudao.framework.ip.core.utils.AreaUtils;
 import cn.iocoder.yudao.framework.ip.core.utils.IPUtils;
 import cn.iocoder.yudao.module.system.controller.admin.ip.vo.AreaNodeRespVO;
+import cn.iocoder.yudao.module.system.controller.admin.ip.vo.LazyAreaNodeRespVO;
 import cn.iocoder.yudao.module.system.convert.ip.AreaConvert;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.validation.annotation.Validated;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 import static cn.iocoder.yudao.framework.common.pojo.CommonResult.success;
 
@@ -29,10 +29,28 @@ public class AreaController {
 
     @GetMapping("/tree")
     @Operation(summary = "获得地区树")
-    public CommonResult<List<AreaNodeRespVO>> getAreaTree(Integer id) {
+    public CommonResult<List<AreaNodeRespVO>> getAreaTree() {
+        Area area = AreaUtils.getArea(Area.ID_CHINA);
+        Assert.notNull(area, "获取不到中国");
+        return success(AreaConvert.INSTANCE.convertList(area.getChildren()));
+    }
+
+    @GetMapping("/getChildrenArea")
+    @Operation(summary = "获得地区的下级区域")
+    public CommonResult<List<LazyAreaNodeRespVO>> getChildrenArea(Integer id) {
         Area area = AreaUtils.getArea(id);
         Assert.notNull(area, String.format("获取不到 id : %d的区域", id));
-        return success(AreaConvert.INSTANCE.convertList(Arrays.asList(area)));
+        return success(AreaConvert.INSTANCE.convertList2(area.getChildren()));
+    }
+
+    @PostMapping("/list")
+    @Operation(summary = "通过区域ids获得地区列表")
+    public CommonResult<List<LazyAreaNodeRespVO>> list(@RequestBody Set<Integer> areaIds) {
+        List<Area> areaList = new ArrayList<>(areaIds.size());
+        for (Integer areaId : areaIds) {
+            areaList.add(AreaUtils.getArea(areaId));
+        }
+        return success(AreaConvert.INSTANCE.convertList2(areaList));
     }
 
     @GetMapping("/get-by-ip")

yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/controller/admin/ip/vo/LazyAreaNodeRespVO.java

@@ -0,0 +1,21 @@
+package cn.iocoder.yudao.module.system.controller.admin.ip.vo;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+/**
+ * @author jason
+ */
+@Schema(description = "管理后台 - 懒加载地区节点 Response VO")
+@Data
+public class LazyAreaNodeRespVO {
+
+    @Schema(description = "编号", required = true, example = "110000")
+    private Integer id;
+
+    @Schema(description = "名字", required = true, example = "北京")
+    private String name;
+
+    @Schema(description = "是否叶子节点", required = true, example = "false")
+    private Boolean leaf = Boolean.FALSE;
+}

yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/convert/ip/AreaConvert.java

@@ -1,11 +1,17 @@
 package cn.iocoder.yudao.module.system.convert.ip;
 
 import cn.iocoder.yudao.framework.ip.core.Area;
+import cn.iocoder.yudao.framework.ip.core.enums.AreaTypeEnum;
 import cn.iocoder.yudao.module.system.controller.admin.ip.vo.AreaNodeRespVO;
+import cn.iocoder.yudao.module.system.controller.admin.ip.vo.LazyAreaNodeRespVO;
 import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.Named;
 import org.mapstruct.factory.Mappers;
+import org.springframework.context.annotation.Lazy;
 
 import java.util.List;
+import java.util.Objects;
 
 @Mapper
 public interface AreaConvert {
@@ -14,4 +20,12 @@ public interface AreaConvert {
 
     List<AreaNodeRespVO> convertList(List<Area> list);
 
+    List<LazyAreaNodeRespVO> convertList2(List<Area> list);
+
+    @Mapping(source = "type", target = "leaf")
+    LazyAreaNodeRespVO convert(Area area);
+
+    default Boolean convertAreaType(Integer type){
+        return Objects.equals(AreaTypeEnum.DISTRICT.getType(),type);
+    }
 }