1.实体类studentTree
import lombok.Data; import java.util.List; @Data public class StudentTree { private String id; private String parent; private String name; private String school;
private String type; private List<StudentTree> children; }
2.controller层
@GetMapping("treeList")
@ApiOperation(value="树")
public ResponseEntity treeList(String type){
return ResponseEntity.ok(pageHelperService.treeList(type));
}
3.service层
private static final String TREE_ROOT_CODE = "0"; public List<StudentTree> treeList(String type) { List<StudentTree> record = pageHelperMapper.treeList(type); List<StudentTree> treeList = new LinkedList(); for (StudentTree sysDept : record) { if (TREE_ROOT_CODE.equals(sysDept.getParent())) { StudentTree tableHeaderInfo = new StudentTree(); BeanUtils.copyProperties(sysDept,tableHeaderInfo); tableHeaderInfo.setChildren(getChild(sysDept.getId(), record)); treeList.add(tableHeaderInfo); } } return treeList; } private static List<StudentTree> getChild(String code, List<StudentTree> record) { List<StudentTree> childrenList = new LinkedList(); for (StudentTree studentTree : record) { if (code.equals(studentTree.getParent())) { StudentTree tableHeaderInfo = new StudentTree(); BeanUtils.copyProperties(studentTree,tableHeaderInfo); tableHeaderInfo.setChildren(getChild(studentTree.getId(), record)); childrenList.add(tableHeaderInfo); } } return childrenList; }
4.postman进行测试（http://localhost:端口号/page/treeList?type=1）
5.结果
[
{
"id": "1",
"parent": "0",
"name": "11",
"school": "111",
"type": "1",
"children": [
{
"id": "6",
"parent": "1",
"name": "66",
"school": "666",
"type": "1",
"children": [
{
"id": "7",
"parent": "6",
"name": "77",
"school": "777",
"type": "1",
"children": [
{
"id": "8",
"parent": "7",
"name": "88",
"school": "888",
"type": "1",
"children": []
}
]
}
]
}
]
},
{
"id": "2",
"parent": "0",
"name": "22",
"school": "222",
"type": "1",
"children": []
},
{
"id": "3",
"parent": "0",
"name": "33",
"school": "333",
"type": "1",
"children": []
},
{
"id": "4",
"parent": "0",
"name": "44",
"school": "444",
"type": "1",
"children": []
}
]
final:不积跬步,无以至千里.不积小流,无以成江海