Java 只有最后一个值被添加到JSON对象

Java 只有最后一个值被添加到JSON对象,java,json,xml-parsing,Java,Json,Xml Parsing,我有一个包含大量数据的xml文件。我已解析xml文件并尝试将值添加到JSON对象,但只添加了最后一个值。请在下面查找我的代码: import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import javax.xml.parsers.

我有一个包含大量数据的xml文件。我已解析xml文件并尝试将值添加到JSON对象,但只添加了最后一个值。请在下面查找我的代码:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Process_Parser {

static JSONObject json= new JSONObject();
//static //JSONObject arrayvalue=new JSONArray();

public static void main(String args[]) {
try {

File process = new File("/Users/instrument.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(process);
doc.getDocumentElement().normalize();

//System.out.println("root of xml file" + doc.getDocumentElement().getNodeName());
NodeList nodes = doc.getElementsByTagName("process");
//System.out.println("==========================");

Element pageElement = (Element)doc.getElementsByTagName("process").item(0);
//NodeList result = pageElement.getElementsByTagName("processName");
System.out.println("Suba-----------"+nodes.getLength());

for (int i = 0; i < nodes.getLength(); i++) {
Node node = nodes.item(i);

if (node.getNodeType() == Node.ELEMENT_NODE) {
Element element = (Element) node;
//System.out.println(getValue("processName", element).contains("carkitd"));
//if(element.getElementsByTagName("process") != null){
if(element.getFirstChild().getNodeValue() != null){
    if(getValue("processName", element).contains("carkitd")){


        json.put("processName",getValue("processName", element));
        json.put("cpuUsage",getValue("cpuUsage", element));
        json.put("realmemory",getValue("realmemory", element));
        json.put("Virtualmemory",getValue("Virtualmemory", element));
        json.put("thread",getValue("thread", element));
        json.put("cputime",getValue("cputime", element));

}
}   

}
} 
//System.out.println("result-array:" +arrayvalue);
System.out.println("result" +json);
//}
//System.out.println("arrayvalue::"+arrayvalue.size());
}catch (Exception ex) {
ex.printStackTrace();
}
}


private static String getValue(String tag, Element element) {
NodeList nodes = element.getElementsByTagName(tag).item(0).getChildNodes();
Node node = (Node) nodes.item(0);
return node.getNodeValue();
}

}
预期结果:

它应该有67个对象

示例xml文件:

<instrument>
    <slice time ='1498215480919'>
        <process>
            <processId>1.000000</processId>
            <processName>launchd</processName>
            <cpuUsage>0.203195</cpuUsage>
            <realmemory>5084.000000</realmemory>
            <Virtualmemory>1080112.000000</Virtualmemory>
            <thread>7.000000</thread>
            <cputime>0.000000</cputime>
        </process>
        <process>
            <processId>24.000000</processId>
            <processName>carkitd</processName>
            <cpuUsage>0.002845</cpuUsage>
            <realmemory>576.000000</realmemory>
            <Virtualmemory>1074752.000000</Virtualmemory>
            <thread>6.000000</thread>
            <cputime>0.000000</cputime>
        </process>
        <process>
            <processId>24.000000</processId>
            <processName>carkitd</processName>
            <cpuUsage>0.002845</cpuUsage>
            <realmemory>576.000000</realmemory>
            <Virtualmemory>1074752.000000</Virtualmemory>
            <thread>6.000000</thread>
            <cputime>0.000000</cputime>
        </process>
    </slice>
    </instrument>

1
发射
0.203195
5084
1080112
7
0
24
卡基特
0.002845
576
1074752
6
0
24
卡基特
0.002845
576
1074752
6
0
我遗漏了什么吗?

你在写:

json.put("processName",getValue("processName", element));
json.put("cpuUsage",getValue("cpuUsage", element));
json.put("realmemory",getValue("realmemory", element));
json.put("Virtualmemory",getValue("Virtualmemory", element));
json.put("thread",getValue("thread", element));
json.put("cputime",getValue("cputime", element));
就像一个
映射
,如果该值已经存在,则会覆盖该值。在每次迭代中,您只需覆盖JSON对象

您应该在每次迭代中创建一个新的
JSONObject
,并将其存储在您正在编写的
JSONArray
中:

json.put("processName",getValue("processName", element));
json.put("cpuUsage",getValue("cpuUsage", element));
json.put("realmemory",getValue("realmemory", element));
json.put("Virtualmemory",getValue("Virtualmemory", element));
json.put("thread",getValue("thread", element));
json.put("cputime",getValue("cputime", element));
就像一个
映射
,如果该值已经存在,则会覆盖该值。在每次迭代中,您只需覆盖JSON对象


您应该在每次迭代中创建一个新的
JSONObject
,并将其存储在
JSONArray

中,您可以参考我的问题以更容易地实现

您可以很快使用JSON java库

可以使用以下代码将XML字符串转换为JSONObject

JSONObject data=XML.toJSONObject(xmlString)

您可以在此处找到有关它的更多信息:

有了以上的参考资料,我至少能够实现这个解决方案。我希望这也能对其他人起作用

private static JSONObject extractData(NodeList nodeList, String tagName) throws TransformerConfigurationException,
        TransformerException, TransformerFactoryConfigurationError, JSONException {
    JSONObject resultObject = new JSONObject();
    for (int i = 0; i < nodeList.getLength(); i++) {
        Node node = nodeList.item(i);
        if (!node.getNodeName().equals(tagName) && node.hasChildNodes()) {
            return extractData(node.getChildNodes(), tagName);
        } else if (node.getNodeName().equals(tagName)) {
            DOMSource source = new DOMSource(node);
            StringWriter stringResult = new StringWriter();
            TransformerFactory.newInstance().newTransformer().transform(source, new StreamResult(stringResult));
            resultObject = XML.toJSONObject(stringResult.toString()).optJSONObject(tagName);
        }
    }
    return resultObject;
}

public static JSONObject getFullData(String tagName, SOAPMessage message) throws Exception {
    NodeList nodeList = message.getSOAPBody().getChildNodes();
    JSONObject resultObject = extractData(nodeList, tagName);
    return resultObject;
}

你可以参考我的问题,以便于实施

您可以很快使用JSON java库

可以使用以下代码将XML字符串转换为JSONObject

JSONObject data=XML.toJSONObject(xmlString)

您可以在此处找到有关它的更多信息:

有了以上的参考资料,我至少能够实现这个解决方案。我希望这也能对其他人起作用

private static JSONObject extractData(NodeList nodeList, String tagName) throws TransformerConfigurationException,
        TransformerException, TransformerFactoryConfigurationError, JSONException {
    JSONObject resultObject = new JSONObject();
    for (int i = 0; i < nodeList.getLength(); i++) {
        Node node = nodeList.item(i);
        if (!node.getNodeName().equals(tagName) && node.hasChildNodes()) {
            return extractData(node.getChildNodes(), tagName);
        } else if (node.getNodeName().equals(tagName)) {
            DOMSource source = new DOMSource(node);
            StringWriter stringResult = new StringWriter();
            TransformerFactory.newInstance().newTransformer().transform(source, new StreamResult(stringResult));
            resultObject = XML.toJSONObject(stringResult.toString()).optJSONObject(tagName);
        }
    }
    return resultObject;
}

public static JSONObject getFullData(String tagName, SOAPMessage message) throws Exception {
    NodeList nodeList = message.getSOAPBody().getChildNodes();
    JSONObject resultObject = extractData(nodeList, tagName);
    return resultObject;
}

创建一个
JSONArray
,并继续在循环中插入
JSONObject

 JSONArray finalArray = new JSONArray(); // create your jsonarray
 for (int i = 0; i < nodes.getLength(); i++) {
     Node node = nodes.item(i);

     if (node.getNodeType() == Node.ELEMENT_NODE) {
         Element element = (Element) node;
         //System.out.println(getValue("processName", element).contains("carkitd"));
         //if(element.getElementsByTagName("process") != null){
         if (element.getFirstChild().getNodeValue() != null) {
             if (getValue("processName", element).contains("carkitd")) {
                 JSONObject json = new JSONObject(); // your temp obj

                 json.put("processName", getValue("processName", element));
                 json.put("cpuUsage", getValue("cpuUsage", element));
                 json.put("realmemory", getValue("realmemory", element));
                 json.put("Virtualmemory", getValue("Virtualmemory", element));
                 json.put("thread", getValue("thread", element));
                 json.put("cputime", getValue("cputime", element));
                 finalArray.put(json); // push your values in the array
             }
         }

     }
 }
 //System.out.println("result-array:" +arrayvalue);
 System.out.println("result " + finalArray);
JSONArray finalArray=new JSONArray();//创建jsonarray
对于(int i=0;i
创建一个
JSONArray
,并继续将
JSONObject
插入循环中

 JSONArray finalArray = new JSONArray(); // create your jsonarray
 for (int i = 0; i < nodes.getLength(); i++) {
     Node node = nodes.item(i);

     if (node.getNodeType() == Node.ELEMENT_NODE) {
         Element element = (Element) node;
         //System.out.println(getValue("processName", element).contains("carkitd"));
         //if(element.getElementsByTagName("process") != null){
         if (element.getFirstChild().getNodeValue() != null) {
             if (getValue("processName", element).contains("carkitd")) {
                 JSONObject json = new JSONObject(); // your temp obj

                 json.put("processName", getValue("processName", element));
                 json.put("cpuUsage", getValue("cpuUsage", element));
                 json.put("realmemory", getValue("realmemory", element));
                 json.put("Virtualmemory", getValue("Virtualmemory", element));
                 json.put("thread", getValue("thread", element));
                 json.put("cputime", getValue("cputime", element));
                 finalArray.put(json); // push your values in the array
             }
         }

     }
 }
 //System.out.println("result-array:" +arrayvalue);
 System.out.println("result " + finalArray);
JSONArray finalArray=new JSONArray();//创建您的JSONArray
对于(int i=0;i
使用
JSONObject
JSONArray
在for循环中创建对象,并在对象填充后将对象添加到数组中使用
JSONArray
JSONObject
在for循环中创建对象,并在对象填充后将对象添加到数组中