如何访问Spring休息控制器中的普通json主体？

Question

拥有以下代码:

@RequestMapping(value = "/greeting", method = POST, consumes = APPLICATION_JSON_VALUE, produces = APPLICATION_JSON_VALUE)
@ResponseBody
public String greetingJson(@RequestBody String json) {
    System.out.println("json = " + json); // TODO json is null... how to retrieve plain json body?
    return "Hello World!";
}

尽管json在正文中发送,但String json参数始终为null.

请注意,我不想要自动类型转换,我只想要普通的json结果.

这例如有效:

@RequestMapping(value = "/greeting", method = POST, consumes = APPLICATION_JSON_VALUE, produces = APPLICATION_JSON_VALUE)
@ResponseBody
public String greetingJson(@RequestBody User user) {
    return String.format("Hello %s!", user);
}

可能我可以使用ServletRequest或InputStream作为参数来检索实际的身体,但我想知道是否有更简单的方法？

Answer 1

我发现的最佳方法是:

@RequestMapping(value = "/greeting", method = POST, consumes = APPLICATION_JSON_VALUE, produces = APPLICATION_JSON_VALUE)
@ResponseBody
public String greetingJson(HttpEntity<String> httpEntity) {
    String json = httpEntity.getBody();
    // json contains the plain json string

如果还有其他选择,请告诉我.

Answer 2

你可以使用

@RequestBody String pBody

Answer 3

只有HttpServletRequest为我工作.HttpEntity给出了空字符串.

import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.IOUtils;

@RequestMapping(value = "/greeting", method = POST, consumes = APPLICATION_JSON_VALUE, produces = APPLICATION_JSON_VALUE)
@ResponseBody
public String greetingJson(HttpServletRequest request) throws IOException {
    final String json = IOUtils.toString(request.getInputStream());
    System.out.println("json = " + json);
    return "Hello World!";
}

Answer 4

对我有用的最简单的方法是

@RequestMapping(value = "/greeting", method = POST, consumes = MediaType.ALL_VALUE, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
@ResponseBody
public String greetingJson(String raw) {
    System.out.println("json = " + raw);
    return "OK";
}