Java 处理不同的JSONArray类型
我有一个程序,读取一个简单的JSON文件并处理数据。然后,我将这些数据存储在树中(尽管很糟糕)。我有一个问题,参数可以是long,比如{1,2},long和变量,比如{1,x2},或者变量和其他变量,比如{x1,x2} 我已经能够从JSONArray中检索变量。当我有一个变量和一个值时,问题就出现了。我一辈子都想不出如何处理这样的事情。对于过度使用try-catch操作,我深表歉意。如果有人能帮我解决这个问题,我将不胜感激Java 处理不同的JSONArray类型,java,json,tree,Java,Json,Tree,我有一个程序,读取一个简单的JSON文件并处理数据。然后,我将这些数据存储在树中(尽管很糟糕)。我有一个问题,参数可以是long,比如{1,2},long和变量,比如{1,x2},或者变量和其他变量,比如{x1,x2} 我已经能够从JSONArray中检索变量。当我有一个变量和一个值时,问题就出现了。我一辈子都想不出如何处理这样的事情。对于过度使用try-catch操作,我深表歉意。如果有人能帮我解决这个问题,我将不胜感激 public class program { public stati
public class program {
public static void main(String[] args) throws IOException {
File file = new File();
File outputfile = new File();
PrintWriter pw = new PrintWriter(new BufferedWriter(new
FileWriter(outputfile, true)));
JSONParser parser = new JSONParser();
try {
// creates object of parsed file
Object object = parser.parse(new FileReader(file));
// casts object to jsonObject
JSONObject jsonObject = (JSONObject) object;
// gets declaration-list JSONArray from the object created.
JSONArray jsonArray = (JSONArray) jsonObject.get("declaration-list");
// Surrounding this in a try-catch would allow me to deal with the
// different value cases unlike the frist time i wrote it
try {
/*
* iterator to cycle through the array. Made the mistake last
* time of continuously calling a method
*/
Iterator iterator = jsonArray.iterator();
while (iterator.hasNext()) {
JSONObject jo = (JSONObject) iterator.next();
String variableName = (String) jo.get("declared-variable");
MyTreeNode<String> root = new MyTreeNode<>(variableName);
try {
long value = (long) jo.get("value");
MyTreeNode<Long> child1 = new MyTreeNode(value);
System.out.println(root.getData());
root.addChild(child1);
for (MyTreeNode node : root.getChildren()) {
System.out.println(node.getData());
}
test.put(variableName, value);
// numPrint(test, variableName, pw);
} catch (Exception e) {
final JSONObject jsonValue = (JSONObject) jo.get("value");
final String operator = (String) jsonValue.get("operator");
final JSONArray arguments = (JSONArray) jsonValue.get("arguments");
ArrayList values[] = new ArrayList[arguments.size()];
if (operator.equals("set")) {
for(int i = 0; i < arguments.size(); i++){
try{
//prints nested variables
JSONObject jtest = (JSONObject) arguments.get(i);
String varval = (String) jtest.get("variable");
System.out.println(varval);
}catch(Exception g){
}
}
MyTreeNode<myObject> test1 = new MyTreeNode(new myObject(operator, arguments));
root.addChild(test1);
for (MyTreeNode node : root.getChildren()) {
System.out.print(root.getData());
System.out.print(" = ");
System.out.println(node.getData());
}
}
if (operator.equals("pair")) {
MyTreeNode<myObject> test1 = new MyTreeNode(new myObject(operator, arguments));
root.addChild(test1);
for (MyTreeNode node : root.getChildren()) {
System.out.print(root.getData() + " = ");
System.out.println(node.getData());
}
}
}
}
} catch (Exception e) {
System.out.println("oops");
}
} catch (FileNotFoundException e) {
System.out.println("Input file not found");
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParseException e) {
System.out.println("File was not parsed");
e.printStackTrace();
}
pw.flush();
pw.close();
}
公共类程序{
公共静态void main(字符串[]args)引发IOException{
File File=新文件();
File outputfile=新文件();
PrintWriter pw=新的PrintWriter(新的BufferedWriter(新的
FileWriter(outputfile,true));
JSONParser=新的JSONParser();
试一试{
//创建已解析文件的对象
Object=parser.parse(新文件读取器(文件));
//将对象强制转换为jsonObject
JSONObject JSONObject=(JSONObject)对象;
//从创建的对象获取声明列表JSONArray。
JSONArray JSONArray=(JSONArray)jsonObject.get(“声明列表”);
//围绕着这一点,我可以试着去解决这个问题
//不同的价值案例不同于我第一次写它
试一试{
/*
*迭代器循环遍历数组。上次出错
*连续调用方法的时间
*/
迭代器迭代器=jsonArray.Iterator();
while(iterator.hasNext()){
JSONObject jo=(JSONObject)迭代器.next();
字符串variableName=(String)jo.get(“声明的变量”);
MyTreeNode根=新的MyTreeNode(variableName);
试一试{
long value=(long)jo.get(“value”);
MyTreeNode child1=新的MyTreeNode(值);
System.out.println(root.getData());
root.addChild(child1);
对于(MyTreeNode节点:root.getChildren()){
System.out.println(node.getData());
}
测试。输入(变量名称、值);
//numPrint(测试,变量名称,pw);
}捕获(例外e){
最终JSONObject jsonValue=(JSONObject)jo.get(“value”);
最终字符串运算符=(字符串)jsonValue.get(“运算符”);
最终JSONArray参数=(JSONArray)jsonValue.get(“参数”);
ArrayList值[]=新ArrayList[arguments.size()];
if(运算符等于(“set”)){
对于(int i=0;i
}
MyTreeNode类{
私有T数据=null;
private List children=new ArrayList();
private MyTreeNode parent=null;
公共MyTreeNode(T数据){
这个数据=数据;
}
public void addChild(MyTreeNode child){
child.setParent(this);
this.children.add(child);
}
公共void addChild(T数据){
MyTreeNode newChild=新MyTreeNode(数据);
newChild.setParent(this);
添加(newChild);
}
公共子项(列出子项){
用于(MyTreeNode t:儿童){
t、 setParent(本);
}
this.children.addAll(children);
}
公共列表getChildren(){
返回儿童;
}
公共T getData(){
返回数据;
}
公共无效设置数据(T数据){
这个数据=数据;
}
私有void setParent(MyTreeNode父级){
this.parent=parent;
}
公共MyTreeNode getParent(){
返回父母;
}
}
类myObject{
字符串运算符;
JSONArray论点;
公共myObject(字符串运算符、JSONArray参数){
this.operator=操作员;
this.arguments=参数;
}
公共JSONArray get(){
返回参数;
}
公共字符串toString(){
if(arguments.size()==0){
返回“{}”;
}
if(运算符等于(“对”)){
返回“(“+arguments.get(0)+”,“+arguments.get(1)+”);
}else if(运算符等于(“set”)){
字符串concat=“{”+arguments.g
class MyTreeNode<T> {
private T data = null;
private List<MyTreeNode> children = new ArrayList<>();
private MyTreeNode parent = null;
public MyTreeNode(T data) {
this.data = data;
}
public void addChild(MyTreeNode child) {
child.setParent(this);
this.children.add(child);
}
public void addChild(T data) {
MyTreeNode<T> newChild = new MyTreeNode<>(data);
newChild.setParent(this);
children.add(newChild);
}
public void addChildren(List<MyTreeNode> children) {
for (MyTreeNode t : children) {
t.setParent(this);
}
this.children.addAll(children);
}
public List<MyTreeNode> getChildren() {
return children;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
private void setParent(MyTreeNode parent) {
this.parent = parent;
}
public MyTreeNode getParent() {
return parent;
}
class myObject {
String operator;
JSONArray arguments;
public myObject(String operator, JSONArray arguments) {
this.operator = operator;
this.arguments = arguments;
}
public JSONArray get() {
return arguments;
}
public String toString() {
if (arguments.size() == 0) {
return "{}";
}
if (operator.equals("pair")) {
return "(" + arguments.get(0) + "," + arguments.get(1) + ")";
} else if (operator.equals("set")) {
String concat = "{" + arguments.get(0);
for (int i = 1; i < arguments.size(); i++) {
concat += "," + arguments.get(i);
}
return concat += "}";
}
return "wot";
}
private static void processArray(JSONArray jsonArray) {
jsonArray.forEach(o -> {
if (o instanceof Number) {
processNumber((Number) o);
} else if (o instanceof JSONObject) {
process((JSONObject) o);
} else if (o instanceof String) {
process((String) o);
} else if (o instanceof JSONArray) {
processArray((JSONArray) o); // recursive call here.
}
});
}
private static void process(String o) {
System.out.println(o); // just an example
}
public static void processNumber(Number number) {
System.out.println(number); // just an example
}
private static void process(JSONObject o) {
o.forEach((s, o1) -> {
System.out.println(s);
if (o1 instanceof Number) {
processNumber((Number) o1);
} else if (o1 instanceof JSONObject) {
process((JSONObject) o1); // recursion
} else if (o1 instanceof String) {
process((String) o1);
} else if (o1 instanceof JSONArray) {
processArray((JSONArray) o1);
}
});
}
{
"declared-variable": "x17",
"value": {
"operator": "set",
"arguments": [
1,
2,
{
"variable": "x8"
}
]
}
}
public static void main(String[] args) throws IOException, ParseException {
JSONParser jsonParser = new JSONParser(JSONParser.MODE_JSON_SIMPLE);
try (InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream("array_mixed.json")) {
Object obj = jsonParser.parse(in);
if (obj instanceof JSONArray) {
processArray((JSONArray) obj);
}
else if(obj instanceof Object) {
process((JSONObject) obj);
}
}
}
declared-variable
x17
value
arguments
1
2
variable
x8
operator
set