我正在尝试将一些 JSON 数据发布到 RESTful spring Controller 。但得到“400 Bad Request”作为响应状态。
给出我为此使用的关键配置文件中的以下代码:
pom.xml 依赖项:
enter code here <properties>
<org.springframework-version>4.1.4.RELEASE</org.springframework-version>
</properties>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- json -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.1.1</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
调度程序-servlet.xml:
<beans:bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<beans:property name="messageConverters">
<beans:list>
<beans:ref bean="jsonConverter" />
<!-- <ref bean="marshallingConverter" /> <ref bean="atomConverter" /> -->
</beans:list>
</beans:property>
</beans:bean>
<beans:bean id="jsonConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<beans:property name="supportedMediaTypes" value="application/json" />
</beans:bean>
Controller 类:
@Controller
@RequestMapping("/api/beacons")
public class APIController {
private static final Logger logger = LoggerFactory.getLogger(APIController.class);
@Autowired
BeaconService beaconService;
@RequestMapping(method = RequestMethod.GET, produces = "application/json")
@ResponseBody
public List<BeaconVO> listAllBeacons() {
logger.info("/api/beacon GET");
List beacons = beaconService.findList(new BeaconVO());
return beacons;
}
@RequestMapping(method = RequestMethod.POST, consumes = "application/json")
// @ResponseStatus(HttpStatus.NO_CONTENT)
@ResponseBody
public BeaconVO saveBeacon(@RequestBody BeaconVO beaconVO) {
logger.info("/api/beacon POST");
beaconService.register(beaconVO);
return beaconVO;
}
请求详细信息:
URL:http: // localhost:8080/test/api/beacons
Method:
POST
Headers:Accept:application/
json
Payload:
{
"no": 1 ,
"uuid": "123"
}
BeaconVO:
public class BeaconVO {
private int no;
private String uuid;
public int getNo() {
return no;
}
public void setNo(int no) {
this.no = no;
}
public String getUuid() {
return uuid;
}
public void setUuid(String uuid) {
this.uuid = uuid;
}
}
客户端代码(android)
public class MainActivity extends Activity {
private static final String URL = "http://192.168.1.24:8080/test/api/beacons";
Button btnGet, btnPost;
TextView tv;
JSONObject json;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnGet = (Button) findViewById(R.id.btnGet);
btnPost = (Button) findViewById(R.id.btnPost);
tv = (TextView) findViewById(R.id.tv);
btnGet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
try {
String jsonData = getJSONData(URL, "GET");
if (jsonData == null || jsonData.isEmpty()) {
return;
}
JSONArray jsonArray = new JSONArray(jsonData);
json = jsonArray.getJSONObject(0);
StringBuilder sb = new StringBuilder();
sb.append("no / UUID\n");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = (JSONObject) jsonArray.get(i);
sb.append(jsonObject.getString("no") + " / " + jsonObject.getString("uuid"));
sb.append("\n");
}
setText(json.toString(), false);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
setText(e.toString(), true);
}
}
}).start();
}
});
btnPost.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread(new Runnable() {
@Override
public void run() {
// setJSONData(URL, "POST", json.toString());
POST(URL, json.toString());
}
}).start();
}
});
}
public void POST(String strUrl, String jsonData) {
try {
URL url = new URL(strUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(5000);// 5 secs
connection.setReadTimeout(5000);// 5 secs
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/json");
InputStream is = null;
int status = connection.getResponseCode();
if (status >= HttpURLConnection.HTTP_BAD_REQUEST) {
is = connection.getErrorStream();
} else {
is = connection.getInputStream();
}
if (connection.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + connection.getResponseCode());
}
OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
out.write(jsonData);
out.flush();
out.close();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String line = null;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
connection.disconnect();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
setText(e.toString(), true);
}
}
private String getJSONData(String url, String method) {
try {
InputStream is = getInputStream(url, method);
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
int bufferSize = 1024 * 1024;
char[] readBuf = new char[bufferSize];
int resultSize = 0;
while ((resultSize = br.read(readBuf)) != -1) {
if (resultSize == bufferSize) {
sb.append(readBuf);
} else {
for (int i = 0; i < resultSize; i++) {
sb.append(readBuf[i]);
}
}
}
final String jsonData = sb.toString();
setText(jsonData, false);
is.close();
return jsonData;
} catch (Exception e) {
e.printStackTrace();
setText(e.toString(), true);
return null;
}
}
private InputStream getInputStream(String strUrl, String method) {
InputStream is;
try {
log("getInputStream(" + strUrl + ", " + method + ")");
URL url = new URL(strUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod(method);
connection.setRequestProperty("Accept", "application/json");
int status = connection.getResponseCode();
if (status >= HttpURLConnection.HTTP_BAD_REQUEST) {
is = connection.getErrorStream();
} else {
is = connection.getInputStream();
}
if (connection.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + connection.getResponseCode());
}
} catch (Exception e) {
e.printStackTrace();
setText(e.toString(), true);
return null;
}
return is;
}
StringBuilder sb = new StringBuilder();
private void setText(final String msg, final boolean isError) {
runOnUiThread(new Runnable() {
@Override
public void run() {
if (isError) {
sb.append(msg);
sb.append("\n");
tv.setText("\n-------------------\n"+sb.toString());
} else {
tv.setText(msg);
}
}
});
}
}
请帮助我。
最佳答案
有效负载主体可能无法设置(映射)到 BeaconVO 对象。
关于java - 400 错误请求 - 将 JSON 数据发布到 RESTful Controller 时，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42339415/