java实现解析json复杂数据的第三种思路详解
作者：爱码少年
这篇文章主要为大家信息介绍了java实现解析json复杂数据的第三种思路,文中的示例代码讲解详细,感兴趣的小伙伴可以跟随小编一起学习一下
一、概述
我们已经通过解析返回json字符串得到数据,现在改变思路, 按照如下流程获取数据:
二、数据预览
1. 接口json数据
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}2. json转xml数据
<?xml version="1.0" encoding="UTF-8"?>
<root>
<code>200</code>
<message>success</message>
<traceId>cec7dfb0-78f4-40c4-b1ce-7463b100e3fd</traceId>
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<formatTime>前天 14:11</formatTime>
<picList>https://img-blog.csdnimg.cn/direct/a409a0f4555c459fa05c00fd9ee0ea8c.png</picList>
<collectCount>21</collectCount>
</list>
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<title>java lambda表达式训练题一</title>
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<title>二维码初体验 com.google.zxing 实现续 - web api封装</title>
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</root>三、代码实现
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. 核心代码
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同步调用
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转xml
JsonNode jsonNode = jsonMapper.readTree(jsonText);
String xml = xmlMapper.writeValueAsString(jsonNode);
// dom4j、XPath
Document doc = new SAXReader().read(new StringReader(xml));
doc.selectNodes("//data/list/url").stream().forEach(n -> log.info(n.getStringValue()));
doc.selectNodes("//data/list/viewCount").stream().forEach(n -> log.info(n.getStringValue()));
}
}3. 运行结果
四、源码传送
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