字符窜转节点并打印节点树或转JSON

 

我司目前有一个这样子需求：数据库存储的是一条条记录，有一列是存储的目录结构的字符窜，如下：

xxxx公司/yy网区/zz电局/变电/bcdef/220kV石西站/主变区域/#2主变间隔/#2主变/#2主变

要把这些转化为JSON传给前端，下面是一些

  1 package com.xx.yyyy;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 /**
  7  * <p> Test </p>
  8  *
  9  * @author Aion.Liu
 10  * @version v1.0.0
 11  * @since 2020/6/23 2:26 下午
 12  */
 13 public class Test {
 14 
 15     public void parseString() {
 16 
 17         NodTree nodeTree = new NodTree();
 18         nodeTree.setNodeValue("root");
 19 
 20         String str0 = "XX电网公司/XX网区/XX供电局/变电/aa巡维班/220kV111/主变区域/#2主变间隔/#2主变/#2主变";
 21         String str1 = "xx电网公司/XX网区/XX供电局/变电/bb巡维班/220kV222/主变区域/#1主变间隔/#1主变压器/#1主变";
 22         ... 43         String str23 = "XX电网公司/XX网区/XX供电局/变电/cc巡维班/220kV333/主变区域/#1主变间隔/#1主变/#1主变";
 44         String str24 = "XX电网公司/XX网区/XX供电局/变电/dd巡维班/220kV333/主变区域/#2主变间隔/#2主变/#2主变";
 45 
 46         String str25 = "YY电网公司/XX网区/XX供电局/变电/ee巡维班/220kV444/主变区域/#2主变间隔/#2主变/#2主变";
 47 
 48         List<String> stringList = new ArrayList<>();
 49         stringList.add(str0);
 50         stringList.add(str1);
 51         ... 73         stringList.add(str24);
 74         stringList.add(str25);
 75 
 76         for (String str : stringList) {
 77             addNode(nodeTree, str.split("/"));
 78         }
 79 
 80 //        print(nodeTree, 0);
 81 
 82         nodeTree.toJson(nodeTree);
 83 
 84         System.out.println(nodeTree.getBuffer());
 85 
 86     }
 87 
 88 
 89 
 90 
 91     public void addNode(NodTree nodeTree, String[] strArr) {
 92         NodTree creatNodeTree = null;
 93         NodTree queryNode = null;
 94         NodTree parentNode = nodeTree;
 95         for (String str : strArr) {
 96             queryNode = parentNode.hasSubNode(str);
 97             if (null == queryNode) {
 98                 creatNodeTree = new NodTree();
 99                 creatNodeTree.setNodeValue(str);
100                 parentNode.addSunNode(creatNodeTree);
101 
102                 parentNode = creatNodeTree;
103             } else {
104                 parentNode = queryNode;
105             }
106         }
107     }
108 
109 
110 
111     class NodTree {
112 
113         String nodeValue = null;
114 
115         List<NodTree> nodeList = new ArrayList<NodTree>();
116 
117         StringBuffer buffer = new StringBuffer();
118 
119         public String getNodeValue() {
120             return nodeValue;
121         }
122 
123         public void setNodeValue(String nodeValue) {
124             this.nodeValue = nodeValue;
125         }
126 
127         public List<NodTree> getNodeList() {
128             return nodeList;
129         }
130 
131         public void setNodeList(List<NodTree> nodeList) {
132             this.nodeList = nodeList;
133         }
134 
135         public void addSunNode(NodTree nodeTree) {
136             nodeList.add(nodeTree);
137         }
138 
139         public StringBuffer getBuffer() {
140             return buffer;
141         }
142 
143         public void setBuffer(StringBuffer buffer) {
144             this.buffer = buffer;
145         }
146 
147         public NodTree hasSubNode(String str) {
148             if (null != nodeList && !nodeList.isEmpty()) {
149                 for (NodTree nodeTree : nodeList) {
150                     if (nodeTree.nodeValue.equals(str)) {
151                         return nodeTree;
152                     }
153                 }
154             }
155             return null;
156         }
157 
158         /**
159          * 节点树打印
160          * @param nodeTree 节点树
161          * @param w
162          */
163         public void print(NodTree nodeTree, int w) {
164             for (int i = 0; i < w; i++) {
165                 System.out.print(" ");
166             }
167             System.out.println("|-" + nodeTree.nodeValue);
168             for (NodTree tree : nodeTree.getNodeList()) {
169                 print(tree, w + 1);
170             }
171         }
172 
173 
174         /**
175          * 节点树 转 JSON
176          * @param nodeTree 节点树
177          */
178         public void toJson(NodTree nodeTree) {
179             buffer.append("{\"data\":" + "\"" + nodeTree.getNodeValue() + "\"");
180             if (nodeTree.getNodeList().size() == 0) {
181                 buffer.append(",\"children\":null}");
182                 return;
183             } else {
184                 buffer.append(", \"children\":[");
185                 for (NodTree n : nodeTree.getNodeList()) {
186                     toJson(n);
187                     buffer.append(",");
188                 }
189                 buffer = buffer.deleteCharAt(buffer.lastIndexOf(","));
190                 buffer.append("]}");
191             }
192         }
193     }
194 
195 
196     public static void main(String[] args) {
197         Test t = new Test();
198         t.parseString();
199     }
200 }

 

 

执行结果转换查看:

 

 

理解数据格式后，才能更好的转换成为json提供给前端使用。

posted @ 2020-06-23 15:19  一世尘梦（Aion）  阅读(305)  评论(0)  编辑  收藏  举报