我编写了一些 Java 代码，用于将 JSON 输入文件转换为等效的 XML 文件。我使用了 stackoverflow 上其他问题的一些答案。但是，我收到错误:
[Fatal Error] :1:123: The markup in the document following the root element must be well-formed.
Exception in thread "main" org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 123; The markup in the document following the root element must be well-formed.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:251)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:300)
at TranslateJSONtoXML.stringToDom(TranslateJSONtoXML.java:34)
at TranslateJSONtoXML.main(TranslateJSONtoXML.java:43)
为什么会出现这个错误？我假设 JSON 输入格式正确。 所以，这是代码:
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
import org.json.JSONObject;
import org.json.XML;
import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
public class TranslateJSONtoXML {
public static String readFile(String pathname) throws IOException {
File file = new File(pathname);
StringBuilder fileContents = new StringBuilder((int)file.length());
Scanner scanner = new Scanner((Readable) new BufferedReader(new FileReader(file)));
String lineSeparator = System.getProperty("line.separator");
try {
while(scanner.hasNextLine()) {
fileContents.append(scanner.nextLine()).append(lineSeparator);
}
return fileContents.toString();
} finally {
scanner.close();
}
}
public static Document stringToDom(String xmlSource)
throws SAXException, ParserConfigurationException, IOException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
return builder.parse(new InputSource(new StringReader(xmlSource)));
}
public static void main(String[] args)
throws SAXException, ParserConfigurationException, IOException {
String jsonString = readFile("/Users/monicamarcus/Downloads/Attachments_20131023/edl.json");
JSONObject o = new JSONObject(jsonString);
String xml = org.json.XML.toString(o);
System.out.println(xml);
Document doc = stringToDom(xml);
System.out.println(doc.getDocumentURI());
}
}
错误来自行 return builder.parse(new InputSource(new StringReader(xmlSource)));
这是我得到的 XML。它显然格式不正确，但我不知道为什么我会得到这个:
<javascript>function textCounterEval(e,t){var n=t;var r=n.length;if(r>=e){return true}else{return false}}</javascript>
<title>Request Conversion</title>
<configParams>param1</configParams>
<configParams>param2</configParams>
<instructions>** Fields with an asterisk are required.</instructions>
<name>RequestJSON.eDoc.Form</name>
<createInstructions>** Fields with an asterisk are required.</createInstructions>
<eventNotificationURL>http://localhost:8080/xx-xxx/xxx.jsp</eventNotificationURL>
<fieldDefs>
<attributeName>RequestChange.eDoc.isUrgent.RuleAttribute</attributeName>
<title>URGENT</title>
<validation><message>Please Select a Campus.</message>
<customValidator>function addEvent(e,t,n,r){if(e.addEventListener){e.addEventListener(t,n,r);return true}else if(e.attachEvent){var i=e.attachEvent('on'+t,n);return i}else{e['on'+t]=n}}</customValidator>
<regex>[^Select]</regex>
<required>true</required>
</validation><name>isUrgent</name>
<value>no</value>
<display>
<values>
<title>--- Select ---</title>
</values>
<values>
<title>Group1</title>
<value>sampleGroup1</value>
</values>
<values>
<title>Group2</title>
<value>sampleGroup2</value>
</values>
<valuesGroup>
<values>
<title>NO</title>
<value>NO</value>
</values>
<values>
<title>YES</title>
<value>YES</value>
</values>
<dependsOn>
<field>
<name>abc</name>
<value>XYZ</value>
</field>
</dependsOn>
</valuesGroup>
<type>select</type>
<meta>
<name>cols</name>
<value>60</value>
</meta>
</display>
<lookup>
<fieldConversions>conversions</fieldConversions>
<businessObjectClassName>org.xxx.xxxx</businessObjectClassName>
</lookup>
</fieldDefs>
<fieldDefs>
<title>Date and Time for Change: MM/DD/YYYY</title>
<validation>
<message>Enter a valid date in the format mm/dd/yyyy.</message>
<regex>^[0-1]?[0-9](/|-)[0-3]?[0-9](/|-)[1-2][0-9][0-9][0-9]$</regex>
<required>true</required>
</validation>
<name>dateOfChange</name>
<display>
<type>text</type>
</display>
</fieldDefs>
<fieldDefs>
<title>Description of the Change</title>
<validation>
<message>Enter a description of the change.</message>
<required>true</required>
</validation>
<name>descriptionOfChange</name>
<display>
<type>textarea</type>
<meta>
<name>rows</name>
<value>5</value>
</meta>
<meta>
<name>cols</name>
<value>60</value>
</meta>
</display>
</fieldDefs><
validations>
<message>If Request is OTHER, please enter Other Request.</message>
<expression>(wf:field('reason') = 'Other' and
not(wf:empty(wf:field('otherDescription')))) or (wf:field('reason') !=
'Other' and wf:empty(wf:field('otherDescription')))
</expression>
</validations>
<attributes>
<name>NetworkIdRole1Attribute</name>
<fields>
<attributeField>user1Id</attributeField>
<edlField>RoleAdHoc</edlField>
</fields>
</attributes>
<attributes>
<name>NetworkIdRole2Attribute</name>
<fields>
<attributeField>user2Id</attributeField>
<edlField>RoleAdHoc</edlField>
</fields>
</attributes>
<security>Defines security for the edl document
</security>
我还发布了 JSON 文件。不过，它看起来结构良好。
{
"name": "RequestJSON.eDoc.Form",
"title": "Request Conversion",
"configParams": [
"param1",
"param2"
],
"security": "Defines security for the edl document",
"eventNotificationURL": "http://localhost:8080/xx-xxx/xxx.jsp",
"createInstructions": "** Fields with an asterisk are required.",
"instructions": "** Fields with an asterisk are required.",
"validations": [
{
"expression": "(wf:field('reason') = 'Other' and not(wf:empty(wf:field('otherDescription')))) or (wf:field('reason') != 'Other' and wf:empty(wf:field('otherDescription')))",
"message": "If Request is OTHER, please enter Other Request."
}
],
"attributes": [
{
"name": "NetworkIdRole1Attribute",
"fields": [
{
"attributeField": "user1Id",
"edlField": "RoleAdHoc"
}
]
},
{
"name": "NetworkIdRole2Attribute",
"fields": [
{
"attributeField": "user2Id",
"edlField": "RoleAdHoc"
}
]
}
],
"javascript": "function textCounterEval(e,t){var n=t;var r=n.length;if(r>=e){return true}else{return false}}",
"fieldDefs": [
{
"attributeName": "RequestChange.eDoc.isUrgent.RuleAttribute",
"name": "isUrgent",
"title": "URGENT",
"value": "no",
"display": {
"type": "select",
"meta": [
{
"name": "cols",
"value": "60"
}
],
"values": [
{
"title": "--- Select ---"
},
{
"title": "Group1",
"value": "sampleGroup1"
},
{
"title": "Group2",
"value": "sampleGroup2"
}
],
"valuesGroup": {
"dependsOn": {
"field": {
"name": "abc",
"value": "XYZ"
}
},
"values": [
{
"title": "NO",
"value": "NO"
},
{
"title": "YES",
"value": "YES"
}
]
}
},
"lookup": {
"businessObjectClassName": "org.xxx.xxxx",
"fieldConversions": "conversions"
},
"validation": {
"required": "true",
"regex": "[^Select]",
"customValidator": "function addEvent(e,t,n,r){if(e.addEventListener){e.addEventListener(t,n,r);return true}else if(e.attachEvent){var i=e.attachEvent('on'+t,n);return i}else{e['on'+t]=n}}",
"message": "Please Select a Campus."
}
},
{
"name": "dateOfChange",
"title": "Date and Time for Change: MM/DD/YYYY",
"display": {
"type": "text"
},
"validation": {
"required": "true",
"regex": "^[0-1]?[0-9](/|-)[0-3]?[0-9](/|-)[1-2][0-9][0-9][0-9]$",
"message": "Enter a valid date in the format mm/dd/yyyy."
}
},
{
"name": "descriptionOfChange",
"title": "Description of the Change",
"display": {
"type": "textarea",
"meta": [
{
"name": "rows",
"value": "5"
},
{
"name": "cols",
"value": "60"
}
]
},
"validation": {
"required": "true",
"message": "Enter a description of the change."
}
}
]
}
最佳答案
首先，您的 XML 化 JSON 对象不包含 XML header <?xml version="1.0"?>其次，正如我的第一条评论中所述，您的 XML 中有多个根元素。最简单的解决方案是手动添加它们，如下所示:
StringBuilder builder = new StringBuilder();
builder
.append("<?xml version=\"1.0\"?>")
.append("<yourJsonToXmlRootElement>")
.append(xml)
.append("</yourJsonToXmlRootElement>");
xml = builder.toString();
然后使用xml与您的stringToDom功能。
但请注意，可能还有其他我尚未检查的错误。
关于java - 如何在 Java 中将 JSON 转换为 XML，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19557293/