java實現解析json復雜數據的第三種思路詳解

更新時間：2024年01月09日 10:01:03 作者：愛碼少年

這篇文章主要為大家信息介紹了java實現解析json復雜數據的第三種思路,文中的示例代碼講解詳細,感興趣的小伙伴可以跟隨小編一起學習一下

一、概述

接上篇 java解析json復雜數據的兩種思路

我們已經通過解析返回json字符串得到數據,現在改變思路, 按照如下流程獲取數據:

二、數據預覽

1. 接口json數據

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2. json轉xml數據

<?xml version="1.0" encoding="UTF-8"?>
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</root>

三、代碼實現

1. pom.xml

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webflux</artifactId>
            <version>5.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>io.projectreactor.netty</groupId>
            <artifactId>reactor-netty</artifactId>
            <version>0.9.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>2.12.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.10</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
            <version>2.10.2</version>
        </dependency>
        <dependency>
            <groupId>org.dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>2.1.4</version>
        </dependency>
        <dependency>
            <groupId>jaxen</groupId>
            <artifactId>jaxen</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.5.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>

2. 核心代碼

package com.fly.xml;

import java.io.IOException;
import java.io.StringReader;
import java.nio.charset.StandardCharsets;

import org.apache.commons.io.IOUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.client.WebClient;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.json.JsonMapper;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class XmlTest
{
    static JsonMapper jsonMapper = new JsonMapper();
    
    static XmlMapper xmlMapper = new XmlMapper();
    
    static WebClient webClient = WebClient.builder().codecs(configurer -> configurer.defaultCodecs().maxInMemorySize(-1)).build(); 
    
   
    @Test
    public void testApi()
        throws IOException, DocumentException
    {
        //WebClient同步調用
        String url = "https://blog.csdn.net/community/home-api/v1/get-business-list?page=1&size=5&businessType=blog&username=qq_16127313";
        String jsonText = webClient.get().uri(url).acceptCharset(StandardCharsets.UTF_8).accept(MediaType.APPLICATION_JSON).retrieve().bodyToMono(String.class).block();
       
        //json轉xml
        JsonNode jsonNode = jsonMapper.readTree(jsonText);
        String xml = xmlMapper.writeValueAsString(jsonNode);
        
        // dom4j、XPath
        Document doc = new SAXReader().read(new StringReader(xml));
        doc.selectNodes("http://data/list/url").stream().forEach(n -> log.info(n.getStringValue()));
        doc.selectNodes("http://data/list/viewCount").stream().forEach(n -> log.info(n.getStringValue()));
    }
}