将Json转换为XML生成的无效XML [英] Converting Json to XML Generated invalid XML
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问题描述
请查看以下内容。
import java.io.BufferedReader;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONML;
import org.json.JSONTokener;
import org.json.XML;
import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.S3Object;
public class JsonToXML
{
private AmazonS3Client s3;
public JsonToXML（String inputBucket，String inputFile）throws IOException，JSONException
{
//连接到S3
s3 = new AmazonS3Client（新的ClasspathPropertiesFileCredentialsProvider（））;
区域usWest2 = Region.getRegion（Regions.US_EAST_1）;
s3.setRegion（usWest2）;
//下载对象
System.out.println（下载对象）;
S3Object s3Object = s3.getObject（new GetObjectRequest（inputBucket，inputFile））;
System.out.println（Content-Type：+ s3Object.getObjectMetadata（）。getContentType（））;
//读取JSON文件
BufferedReader reader = new BufferedReader（new InputStreamReader（s3Object.getObjectContent（）））;
StringBuffer strBuffer = new StringBuffer（）;
int i = 0;
while（true）{
String line = reader.readLine（）;
if（line == null）break;
System.out.println（Running：+ i）;
strBuffer.append（line）;
i ++;
}
JSONTokener jTokener = new JSONTokener（strBuffer.toString（））;
JSONArray jsonArray = new JSONArray（jTokener）;
//转换为XML
String xml = XML.toString（jsonArray）;
文件f = new File（XML.xml）;
FileWriter fw = new FileWriter（f）;
fw.write（xml）;
}
}
这是Json文件的外观像
[
{
_type：ArticleItem，
body ：谁签名，
source：money.cnn.com，
last_crawl_date：2014-01-14，
url：http： /money.cnn.com/
}，
{
_type：ArticleItem，
body：GMreveals，
title ：GMreveals625-horsepowerCorvetteZ06-Jan.13，
source：money.cnn.com，
last_crawl_date：2014-01-14，
url ：http：//money.cnn.com
}
]
此代码生成无效的XML或无任何文本的文件。在最后一个<> 之后，它仍然生成一些文本，所以整个文件无效。这里有什么问题？请帮助。
更新
根据 jtahlborn的答案
< / body>< _type> ArticleItem< / _ type>< source> money.cnn.com< / source>< last_crawl_date> 2014-01-14< / last_crawl_date>< url> http： /money.cnn.com/</url></array><array><body>GMreveals</body><_type>ArticleItem</_type><title>GMreveals625-horsepowerCorvetteZ06-Jan.13< ; / title>< source> money.cnn.com< / source>< last_crawl_date> 2014-01-14< / last_crawl_date>< url> http：//money.cnn.com</url></阵列>但在这里说：
XML解析错误：垃圾后文档元素
位置：http://www.w3schools.com/xml/xml_validator.asp
行号1，列181：
解决方案
您需要 flush（） / close（） / code> FileWriter 以确保将所有数据写入文件。
问题是您的xml结果（2数组元素）中有2个顶级元素。 xml只能有一个顶级元素。
更新：
尝试将json转换为xml ：
String xml = XML.toString（jsonArray，doc）;
Please have a look at the following.
import java.io.BufferedReader;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONML;
import org.json.JSONTokener;
import org.json.XML;
import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.S3Object;
public class JsonToXML
{
private AmazonS3Client s3;
public JsonToXML(String inputBucket, String inputFile) throws IOException, JSONException
{
//Connection to S3
s3 = new AmazonS3Client(new ClasspathPropertiesFileCredentialsProvider());
Region usWest2 = Region.getRegion(Regions.US_EAST_1);
s3.setRegion(usWest2);
//Downloading the Object
System.out.println("Downloading Object");
S3Object s3Object = s3.getObject(new GetObjectRequest(inputBucket, inputFile));
System.out.println("Content-Type: " + s3Object.getObjectMetadata().getContentType());
//Read the JSON File
BufferedReader reader = new BufferedReader(new InputStreamReader(s3Object.getObjectContent()));
StringBuffer strBuffer = new StringBuffer("");
int i=0;
while (true) {
String line = reader.readLine();
if (line == null) break;
System.out.println("Running: "+i);
strBuffer.append(line);
i++;
}
JSONTokener jTokener = new JSONTokener(strBuffer.toString());
JSONArray jsonArray = new JSONArray(jTokener);
//Convert to XML
String xml = XML.toString(jsonArray);
File f = new File("XML.xml");
FileWriter fw = new FileWriter(f);
fw.write(xml);
}
}
This is how the Json files look like
[
{
"_type": "ArticleItem",
"body": "Who's signing",
"source": "money.cnn.com",
"last_crawl_date": "2014-01-14",
"url": "http: //money.cnn.com/"
},
{
"_type": "ArticleItem",
"body": "GMreveals",
"title": "GMreveals625-horsepowerCorvetteZ06-Jan.13",
"source": "money.cnn.com",
"last_crawl_date": "2014-01-14",
"url": "http: //money.cnn.com"
}
]
This code generated invalid XML or files without any text. Invalid means, after the last <> it still generate some text, so the entire file is invalid. What is wrong here? Please help.
UPDATE
According to the answer of jtahlborn I managed to generate an XML file with the following output.
<array><body>Who's signing</body><_type>ArticleItem</_type><source>money.cnn.com</source><last_crawl_date>2014-01-14</last_crawl_date><url>http: //money.cnn.com/</url></array><array><body>GMreveals</body><_type>ArticleItem</_type><title>GMreveals625-horsepowerCorvetteZ06-Jan.13</title><source>money.cnn.com</source><last_crawl_date>2014-01-14</last_crawl_date><url>http: //money.cnn.com</url></array>
But XML Validator in here says:
XML Parsing Error: junk after document element
Location: http://www.w3schools.com/xml/xml_validator.asp
Line Number 1, Column 181:
解决方案
You need to flush()/close() the FileWriter to ensure all the data is written to the file.
The problem is that you have 2 "top-level" elements in your xml result (2 "array" elements). xml can only have one top-level element.
UPDATE:
Try this for converting the json to xml:
String xml = XML.toString(jsonArray, "doc");
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