java 将 JSON 发布到控制器返回 400 错误请求
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Posting JSON to Controller returns 400 Bad Request
提问by Nilam Naik
I am developing RESTful services. I am not able to POST JSON data to controller.
我正在开发 RESTful 服务。我无法将 JSON 数据发布到控制器。
I am using the following dependencies:
我正在使用以下依赖项：
- Spring : 3.2.3.RELEASE
- Hymanson : 1.9.6
- 春天：3.2.3.RELEASE
- Hyman逊：1.9.6
I also tried:
我也试过：
- Spring 3.2.3.RELEASE w/ Hymanson 1.9.9
- Spring 3.1.1.RELEASE w/ Hymanson 1.9.9
- Spring 3.2.3.RELEASE 与 Hymanson 1.9.9
- Spring 3.1.1.RELEASE 与 Hymanson 1.9.9
as suggested here POSTing JSON to Spring MVC Controller Returns 400 Bad Request
正如这里所建议的POSTing JSON to Spring MVC Controller Returns 400 Bad Request
I made entries of MessageConverters also,
我也输入了 MessageConverters，
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
<bean class="org.springframework.http.converter.ResourceHttpMessageConverter"/>
<bean class="org.springframework.http.converter.json.MappingHymansonHttpMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
Controller
控制器
@Controller
@RequestMapping(value="/todo", consumes="application/json", produces="application/json")
//@RequestMapping(value="/todo", consumes="text/plain", produces="application/json")
public class TodoRestService {
Logger logger = LoggerFactory.getLogger(TodoService.class);
@Autowired
private TodoService todoService;
@RequestMapping(value="/{id}", method= RequestMethod.GET)
@ResponseBody public Todo find(@PathVariable("id") Long id) {
Todo todo = todoService.find(id);
return todo;
}
@RequestMapping(method=RequestMethod.POST)
@ResponseBody public Todo create(@RequestBody Todo todo) {
//public Todo create(@RequestBody String todo) {
//public Todo create(@RequestParam("todo") String todo) {
System.out.println(todo);
todoService.create(newTodo);
return newTodo;
}
}
POJO
POJO
public class TODO {
private String firstName;
private String lastName;
//getter setters
}
I am using postman to POST the JSON
我正在使用邮递员发布 JSON
I have set Content-Type as application/json
我已将 Content-Type 设置为 application/json
form data ----- name = todo value = {"firstName":"nilam","lastName":"naik"}
表单数据 ----- name = todo value = {"firstName":"nilam","lastName":"naik"}
method = POST
方法 = POST
I am getting 400 Bad Request.
我收到 400 个错误的请求。
But If I changed data type of parameter annotated with @RequestBody from TODO to String then
I am getting something like,
但是，如果我将用@RequestBody 注释的参数的数据类型从 TODO 更改为 String，那么
我会得到类似的信息，
------WebKitFormBoundaryu6banLlTPiPudsBB
Content-Disposition: form-data; name="todo"
{"firstName":"nilam","lastName":"naik"}
------WebKitFormBoundaryu6banLlTPiPudsBB--
I also have Hymanson on my classpath.
我的类路径上也有Hyman逊。
If I changed attribute consumes from application/json to text/plain and
如果我将属性消耗从 application/json 更改为 text/plain 和
@RequestBody String todo then I get,
@RequestBody String todo 然后我得到，
{"firstName":"nilam","lastName":"naik"}
But I don't want to manually convert the String to Java Object. But I don't understand why @RequestBody is not able to convert my JSON data to Java Object.
但我不想手动将字符串转换为 Java 对象。但我不明白为什么@RequestBody 无法将我的 JSON 数据转换为 Java 对象。
pom.xml
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven- v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.orci</groupId>
<artifactId>OrciMavenTutorial</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>OrciMavenTutorial Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<!-- <org.springframework.version>3.2.3.RELEASE</org.springframework.version> -->
<org.springframework.version>3.1.1.RELEASE</org.springframework.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.2.2.Final</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbyclient</artifactId>
<version>10.5.3.0_1</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.5.3.0_1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>org.codehaus.Hymanson</groupId>
<artifactId>Hymanson-core-asl</artifactId>
<!-- <version>1.9.6</version> -->
<!-- <version>1.4.2</version> -->
<!-- <version>1.9.9</version> -->
<version>1.9.7</version>
</dependency>
<dependency>
<groupId>org.codehaus.Hymanson</groupId>
<artifactId>Hymanson-mapper-asl</artifactId>
<!-- <version>1.9.6</version> -->
<!-- <version>1.4.2</version> -->
<!-- <version>1.9.9</version> -->
<version>1.9.7</version>
</dependency>
</dependencies>
<build>
<finalName>OrciMavenTutorial</finalName>
</build>
Please someone help me.
请有人帮助我。
回答by shazin
From the explanation you have given one thing is clear, You are using POSTMAN wrongly.
从您给出的解释中可以清楚地看出，您错误地使用了 POSTMAN。
You can not send a @RequestBodyannotated object in a form-data. Forms are handled using @ModelAttributeor @RequestParam(Multiple of this).
您不能@RequestBody在form-data. 使用@ModelAttribute或@RequestParam（此的倍数）处理表单。
If you want to post a JSON to an Controller end point you must do like the following image;
如果您想将 JSON 发布到控制器端点，您必须像下图一样；
You must select POSTobviously and must set a header Content-Typeas application/json, finally you must select rawfrom the tabs and select JSONfrom the dropdown.
您必须POST明显选择并且必须将标题设置Content-Type为application/json，最后您必须raw从选项卡中进行选择并JSON从下拉列表中进行选择。
If you follow this your Controller method must work with Todoobject as @RequestBodyannotation and no need to use Stringand manually convert to object.
如果你遵循这个你的控制器方法必须使用Todo对象作为@RequestBody注释，并且不需要使用String和手动转换为对象。
