怎么取到spring webflux ClientRequest的body的值并转为json
时间: 2024-03-13 12:48:17 浏览: 18
可以通过`ClientRequest`中的`bodyToMono`方法将请求体转换为`Mono<DataBuffer>`对象,然后使用`DataBufferUtils`类中的`join`方法将`DataBuffer`对象转换为字节数组,最后将字节数组转换为JSON字符串。示例代码如下:
```
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.ClientRequest;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;
import java.nio.charset.StandardCharsets;
public class WebClientExample {
public static void main(String[] args) {
WebClient webClient = WebClient.create("https://jsonplaceholder.typicode.com");
String requestBody = "{\"title\": \"foo\",\"body\": \"bar\",\"userId\": 1}";
ClientRequest clientRequest = ClientRequest
.post("/posts")
.contentType(MediaType.APPLICATION_JSON)
.body(BodyInserters.fromValue(requestBody))
.build();
Mono<String> requestJsonMono = clientRequest.bodyToMono(DataBuffer.class)
.flatMap(dataBuffer -> {
byte[] bytes = new byte[dataBuffer.readableByteCount()];
dataBuffer.read(bytes);
DataBufferUtils.release(dataBuffer);
String requestJson = new String(bytes, StandardCharsets.UTF_8);
return Mono.just(requestJson);
});
ObjectMapper objectMapper = new ObjectMapper();
requestJsonMono.subscribe(requestJson -> {
try {
Object requestObject = objectMapper.readValue(requestJson, Object.class);
System.out.println("Request body: " + requestJson);
System.out.println("Request object: " + requestObject);
} catch (Exception e) {
e.printStackTrace();
}
});
}
}
```
在上面的代码中,我们首先构造了一个`ClientRequest`对象,并将请求体设置为一个JSON字符串。然后,我们使用`bodyToMono`方法将请求体转换为`Mono<DataBuffer>`对象。在`flatMap`操作符中,我们将`DataBuffer`对象转换为字节数组,并使用`String`构造函数将字节数组转换为字符串。最后,我们使用`ObjectMapper`将字符串转换为一个Java对象。在订阅方法中,我们打印出了请求体的JSON字符串和Java对象。