json转xml

1、引入jar包

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.3</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>com.thoughtworks.xstream</groupId>
            <artifactId>xstream</artifactId>
            <version>1.4.10</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.8.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-collections/commons-collections -->
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-io -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-lang/commons-lang -->
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/net.sf.ezmorph/ezmorph -->
        <dependency>
            <groupId>net.sf.ezmorph</groupId>
            <artifactId>ezmorph</artifactId>
            <version>1.0.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.json/json -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20160810</version>
        </dependency>
        <dependency>
            <groupId>de.odysseus.staxon</groupId>
            <artifactId>staxon</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>xom</groupId>
            <artifactId>xom</artifactId>
            <version>1.1</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、代码：
 

package com.example.demo.tree;

import com.thoughtworks.xstream.XStream;
import de.odysseus.staxon.json.JsonXMLConfig;
import de.odysseus.staxon.json.JsonXMLConfigBuilder;
import de.odysseus.staxon.json.JsonXMLInputFactory;
import de.odysseus.staxon.xml.util.PrettyXMLEventWriter;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLOutputFactory;
import java.io.StringReader;
import java.io.StringWriter;

public class XmlTest {

    public static String textMessageToXml(TreeNode mm) {

        XStream xStream = new XStream();

        xStream.alias("xml", TreeNode.class);

        return xStream.toXML(mm);

    }

    public static String json2xml(String json) {
        StringReader input = new StringReader(json);
        StringWriter output = new StringWriter();
        JsonXMLConfig config = new JsonXMLConfigBuilder().multiplePI(false).repairingNamespaces(false).build();
        try {
            XMLEventReader reader = new JsonXMLInputFactory(config).createXMLEventReader(input);
            XMLEventWriter writer = XMLOutputFactory.newInstance().createXMLEventWriter(output);
            writer=new PrettyXMLEventWriter(writer);
            writer.add(reader);
            reader.close();
            writer.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                output.close();
                input.close();
            }catch (Exception ex){

            }
        }
        System.out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>".length());
        String result=output.toString();
        if(result.length()>=38){
                result=result.substring(38);
        }
        return result;
    }


    public static void main(String[] args) {
        String json = "{\n" +
                "  \"ksnos\": [\n" +
                "    {\n" +
                "      \"ksno\": \"1002103\"\n" +
                "    },\n" +
                "    {\n" +
                "      \"ksno\": \"1002104\"\n" +
                "    },\n" +
                "    {\n" +
                "      \"ksno\": \"17410101152304\"\n" +
                "    }\n" +
                "  ],\n" +
                "  \"count\": \"3\"\n" +
                "}";
      String xml=json2xml(json);
        System.out.println(xml);
    }


}