使用Java从XML元素中删除空格 [英] Remove white space from XML element using java

问题描述

我有一个如下的JSON

I have a JSON as follows

String str = {'Emp name' : 'JSON','Emp id' : 1,'Salary' : 20997.00}

我想使用Java将JSON转换为XML.我的Java代码在这里.

I want to covert this JSON to XML using java.My java code is here.

JSON json= JSONSerializer.toJSON(str);
XMLSerializer xmlSerializer = new XMLSerializer();  

//To Skip the white space from XML data and not from XML Element (By default it does)
    xmlSerializer.setSkipWhitespace(true);  
    //To set type of xml element If it true, it will be type
    xmlSerializer.setTypeHintsCompatibility(true);  
    xmlSerializer.setRootName("book");  
    String xml = xmlSerializer.write( json );  
    System.out.println(xml);        

如果传递xml且XML元素之间没有任何空格(即Emp名称为Empname和Emp id为Empid)，我将得到输出.我想从XML元素中删除空格，而不是从XML Element内容中删除空格.

I am getting an output if I pass the xml without any space between XML element (i.e Emp name as Empname and Emp id as Empid). I want to remove the whitespace from XML element and not from XML Element content.

推荐答案

我反编译并检查了json-lib(2.4)和xom(1.2.5)库.不幸的是，没有关于密钥的这种前/后处理器或处理程序. 这在构建JSON或构建XML时都适用.

I decompiled and checked json-lib(2.4) and xom (1.2.5) libraies. Unfortunately there is no such pre/post processors or handlers regarding to key. This applies both when constructing JSON or building XML as well.

似乎没有其他方法可以手动修复JSON密钥.因此，请检查以下代码段:

Seems like there is no other way to manually fix keys of JSON. So please check below snippet:

public static void main(String[] args) {

        String str = "{'Emp name' : 'JSON','Emp id' : 1,'Salary' : 20997.00, " +
                "'manager' : {'first name':'hasan', 'last name' : 'kahraman'}," +
                "'co workers': [{'first name':'john', 'last name' : 'wick'}, " +
                "{'first name':'albert', 'last name' : 'smith'}]}";

        JsonConfig config = new JsonConfig();
        JSON json = JSONSerializer.toJSON(str, config);

        fixJsonKey(json);

        XMLSerializer xmlSerializer = new XMLSerializer();
        //To Skip the white space from XML data and not from XML Element (By default it does)
        xmlSerializer.setSkipWhitespace(true);
        //To set type of xml element If it true, it will be type
        xmlSerializer.setTypeHintsCompatibility(true);
        xmlSerializer.setRootName("book");

        String xml = xmlSerializer.write(json);
        System.out.println(xml);
    }

    private static void fixJsonKey(Object json) {

        if (json instanceof JSONObject) {
            JSONObject jsonObject = (JSONObject) json;
            List<String> keyList = new LinkedList<String>(jsonObject.keySet());
            for (String key : keyList) {
                if (!key.matches(".*[\\s\t\n]+.*")) {
                    Object value = jsonObject.get(key);
                    fixJsonKey(value);
                    continue;
                }

                Object value = jsonObject.remove(key);
                String newKey = key.replaceAll("[\\s\t\n]", "");

                fixJsonKey(value);

                jsonObject.accumulate(newKey, value);
            }
        } else if (json instanceof JSONArray) {
            for (Object aJsonArray : (JSONArray) json) {
                fixJsonKey(aJsonArray);
            }
        }
    }

输出如下:

<?xml version="1.0" encoding="UTF-8"?>
<book>
    <Empid type="number">1</Empid>
    <Empname type="string">JSON</Empname>
    <Salary type="number">20997.0</Salary>
    <coworkers class="array">
        <e class="object">
            <firstname type="string">john</firstname>
            <lastname type="string">wick</lastname>
        </e>
        <e class="object">
            <firstname type="string">albert</firstname>
            <lastname type="string">smith</lastname>
        </e>
    </coworkers>
    <manager class="object">
        <firstname type="string">hasan</firstname>
        <lastname type="string">kahraman</lastname>
    </manager>
</book>

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