本篇内容介绍了“如何使用json字符串插入节点或者覆盖节点”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
JSONObject obj=JSONObject.parseObject(jfdaJson);
obj.put("dj",xydjDm);// 更新dj字段
obj.put("xydjMc",xydjMc);// 添加xydjMc字段
obj.toString();按ID查询树
http://host/tree_data/node/${treeId}
in: {node: {key: ..., ...}, parent: ${key}, sequ: ${sequ}}http://host/tree_data/node/${treeId}/${key}
in: {node: {key: ..., ...}}http://host/tree_data/node/${treeId}/${key}
CREATE TABLE `catagory_tree` ( `id` bigint(11) NOT NULL AUTO_INCREMENT, `name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '分类树名称：PRODUCT：产品分类 GOODS：商品分类', `json_tree` text CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '直接存储ANTD树表的数据结构', `modify_staff` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, `modify_time` datetime(0) NOT NULL, PRIMARY KEY (`id`) USING BTREE, INDEX `AK_uni_catagory_tree_name`(`name`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
[{
"id": 1,
"code": "FLOW_NODE_1",
"name": "环节A",
"children": [{
"id": 2,
"code": "RULE_NODE_1",
"name": "规则A"
}, {
"id": 3,
"code": "RULE_NODE_2",
"name": "规则B"
}, {
"id": 4,
"code": "PARALLEL_NODE_2",
"name": "并行节点",
"children": [{
"id": 5,
"code": "RULE_NODE_3",
"name": "规则C1"
}, {
"id": 6,
"code": "RULE_COLLECTION_1",
"name": "规则集1",
"children": [{
"id": 7,
"code": "RULE_NODE_4",
"name": "规则C21"
}, {
"id": 8,
"code": "RULE_NODE_5",
"name": "规则C22"
}]
}]
}, {
"id": 9,
"code": "MUTUAL_NODE_1",
"name": "互斥节点",
"children": [{
"id": 10,
"code": "RULE_NODE_6",
"name": "规则D1"
}, {
"id": 11,
"code": "RULE_NODE_7",
"name": "规则D2"
}]
}]
}, {
"id": 12,
"code": "FLOW_NODE_2",
"name": "环节B"
}]<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.49</version> </dependency>
package cn.chinaunicom.srigz.goods.admin.controller;
import cn.chinaunicom.srigz.goods.admin.service.CatagoryTreeService;
import cn.chinaunicom.srigz.goods.admin.utils.ActionHelper;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.Map;
@RestController
public class CatagoryTreeController {
@Autowired
private CatagoryTreeService catagoryTreeService;
@ApiOperation(value="查询分类树信息", notes="输入分类树Id")
@RequestMapping(value = "/api/v1/tree_data/node/{treeId}", method = RequestMethod.GET)
public Map getOne(@ApiParam(required = true, value = "分类树ID") @PathVariable Integer treeId){
return ActionHelper.responseOk(catagoryTreeService.getOne(treeId));
}
@ApiOperation(value="新建节点", notes="根据输入参数创建节点")
@RequestMapping(value = "/tree_data/node/{treeId}", method = RequestMethod.POST)
public Map addOne(@ApiParam(required = true, value = "分类树ID")@PathVariable Integer treeId,
@ApiParam(required = true, value = "节点信息、父类ID、数组位置") @RequestBody Map map){
return ActionHelper.responseOk(catagoryTreeService.addOne(treeId,map));
}
@ApiOperation(value="更新节点信息", notes="更新节点信息")
@RequestMapping(value = "/tree_data/node/{treeId}/{id}", method = RequestMethod.PATCH)
public Map updateOne(@ApiParam(required = true, value = "分类树ID")@PathVariable Integer treeId,
@ApiParam(required = true, value = "节点ID")@PathVariable Integer id,
@ApiParam(required = true, value = "节点信息") @RequestBody Map map){
return ActionHelper.responseOk(catagoryTreeService.updateOne(treeId,id,map));
}
@ApiOperation(value="删除节点详情", notes="删除节点详情")
@RequestMapping(method = RequestMethod.DELETE,value = "/tree_data/node/{treeId}/{id}")
public Map remove(@ApiParam(required = true, value = "分类树ID")@PathVariable Integer treeId,
@ApiParam(required = true, value = "节点ID")@PathVariable Integer id){
return ActionHelper.responseOk(catagoryTreeService.remove(treeId,id));
}
}JSONArray jsonArray = JSON.parseArray(jsonTree); //由json字符串变成json数组对象 jsonArray.toJSONString() //由json数组对象变成json字符串
package cn.chinaunicom.srigz.goods.admin.service;
import cn.chinaunicom.srigz.goods.admin.database.dao.CatagoryTreeRepository;
import cn.chinaunicom.srigz.goods.admin.database.model.CatagoryTree;
import cn.chinaunicom.srigz.goods.admin.utils.Recursive;
import cn.chinaunicom.srigz.goods.common.exception.AlreadyExistException;
import cn.chinaunicom.srigz.goods.common.exception.BadRequestException;
import cn.chinaunicom.srigz.goods.common.exception.NotFoundException;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.*;
@Service
public class CatagoryTreeService {
@Autowired
private CatagoryTreeRepository catagoryTreeRepository;
/**
* 查询单个分类树
* @param treeId
* @return
*/
public JSON getOne(Integer treeId) {
CatagoryTree catagoryTree = catagoryTreeRepository.findById(treeId.longValue()).get();
return JSON.parseArray(catagoryTree.getJsonTree());
}
/**
* 增加单个节点
* @param treeId
* @param map
* @return
*/
@Transactional
public JSON addOne(Integer treeId, Map map) {
CatagoryTree catagoryTree = catagoryTreeRepository.findById(treeId.longValue()).get();
String jsonTree = catagoryTree.getJsonTree();
JSONArray jsonArray = JSON.parseArray(jsonTree);
Object parentId = map.get("parentId");
Integer sequ = (Integer) map.get("sequ");
if(sequ <= 0 ){
throw new BadRequestException("数组位置不正确");
}
Map nodeMap = (Map) map.get("node");
JSONObject node = new JSONObject(nodeMap);
List list = new ArrayList();
List keyList = Recursive.recursive(jsonArray,"id",list);
for (Object key : keyList) {
if (nodeMap.get("id").toString().equals(key.toString())) {
throw new AlreadyExistException("节点ID为" + key);
}
}
Recursive.addRecursive(jsonArray,node,sequ,"id",parentId);
catagoryTree.setJsonTree(jsonArray.toJSONString());
catagoryTreeRepository.save(catagoryTree);
return jsonArray;
}
/**
* 修改单个节点
* @param treeId
* @param id
* @param map
* @return
*/
@Transactional
public JSON updateOne(Integer treeId, Integer id, Map map) {
CatagoryTree catagoryTree = catagoryTreeRepository.findById(treeId.longValue()).get();
String jsonTree = catagoryTree.getJsonTree();
JSONArray jsonArray = JSON.parseArray(jsonTree);
List list = new ArrayList();
List keyList = Recursive.recursive(jsonArray,"id",list);
JSONObject node = new JSONObject(map);
if (id.toString().equals(map.get("id").toString())) {
for (Object key : keyList) {
if (id.toString().equals(key.toString())) {
Recursive.updateRecursive(jsonArray,"id",id,node);
catagoryTree.setJsonTree(jsonArray.toJSONString());
catagoryTree.setModifyTime(new Date());
catagoryTreeRepository.save(catagoryTree);
return jsonArray;
}
}
}else {
throw new BadRequestException("id is not allowed to be modified");
}
throw new NotFoundException("节点ID为" + id);
}
/**
* 删除节点以及子节点
* @param treeId
* @param id
* @return
*/
@Transactional
public JSON remove(Integer treeId, Integer id) {
CatagoryTree catagoryTree = catagoryTreeRepository.findById(treeId.longValue()).get();
String jsonTree = catagoryTree.getJsonTree();
JSONArray jsonArray = JSON.parseArray(jsonTree);
List list = new ArrayList();
List keyList = Recursive.recursive(jsonArray,"id",list);
for (Object key : keyList) {
if (id.toString().equals(key.toString())) {
Recursive.removeRecursive(jsonArray,"id",id);
catagoryTree.setJsonTree(jsonArray.toJSONString());
catagoryTreeRepository.save(catagoryTree);
return jsonArray;
}
}
throw new NotFoundException("节点ID为" + id);
}
}package cn.chinaunicom.srigz.goods.admin.utils;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.util.List;
public class Recursive {
/**
* 递归取出所有Key对应的value值
* @param jsonArray 需要查询的目标主体
* @param key 需要查询的字段名key
* @param list 存储value值
* @return
*/
public static List recursive(JSONArray jsonArray, String key, List list) {
for (Object obj : jsonArray) {
JSONObject jsonObject = (JSONObject) obj;
JSONArray children = jsonObject.getJSONArray("children");
if (children != null) {
list.add(jsonObject.get(key));
recursive(children,key,list);
}else {
list.add(jsonObject.get(key));
}
}
return list;
}
/**
* 增加节点
* @param jsonArray 需要更新的目标主体
* @param node 增加节点信息
* @param sequ 数组的位置
* @param key 目标主体中的字段名key
* @param value 节点信息与key对应的value
*/
public static void addRecursive(JSONArray jsonArray, JSONObject node, Integer sequ, String key, Object value) {
for (Object obj : jsonArray) {
JSONObject jsonObject = (JSONObject) obj;
JSONArray children = jsonObject.getJSONArray("children");
if (children != null) {
if (value.toString().equals(jsonObject.get(key).toString())) {
if(sequ > children.size()){
children.add(children.size(), node);
}else{
children.add(sequ-1, node);
}
return;
}
addRecursive(children,node,sequ,key,value);
} else {
if (value.toString().equals(jsonObject.get(key).toString())) {
JSONArray array = new JSONArray();
array.add(node);
jsonObject.put("children", array);
return;
}
}
}
}
/**
* 根据条件更新节点
* @param jsonArray 需要更新的目标主体
* @param key 目标主体中的字段名key
* @param value 更新节点信息与key对应的value
* @param node 更新节点信息
*/
public static void updateRecursive(JSONArray jsonArray, String key, Object value, JSONObject node) {
for (int i = 0; i < jsonArray.size() ; i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
JSONArray children = jsonObject.getJSONArray("children");
if (value.toString().equals(jsonObject.get(key).toString())) {
if(children != null){
node.put("children",children);
}
jsonArray.set(i,node);
return;
}else if(children != null){
updateRecursive(children,key,value,node);
}
}
}
/**
* 删除节点
* @param jsonArray 需要更新的目标主体
* @param key 目标主体中的字段名key
* @param value 节点信息与key对应的value
*/
public static void removeRecursive(JSONArray jsonArray,String key,Object value) {
for (Object obj : jsonArray) {
JSONObject jsonObject = (JSONObject) obj;
if (value.toString().equals(jsonObject.get(key).toString())) {
jsonArray.remove(jsonObject);
return;
}
JSONArray children = jsonObject.getJSONArray("children");
if (children != null) {
removeRecursive(children,key,value);
}
}
}
}“如何使用json字符串插入节点或者覆盖节点”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！
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