我知道这个问题已经问过好几次了,但是即使做了所有这些回答后,我仍然很困惑。我是Java EE的新手,在使用Spring框架之前,我希望有一个坚实的基础。所以我的问题是我无法接受/处理发送到简单Java Rest API的json请求。我有一个调用Java rest API的前端网页。但是,即使通过“ PostMan”,我也会遇到相同的错误
“ HTTP状态415 –不支持的媒体类型”
我有一个带有两种方法的简单控制器类。接受String的Get方法工作正常。但是问题出在Post方法上。我的标头值为"content-type:application/json"
。但问题仍然存在
我只想了解几件事。我有一个与json请求相同的字段名称的Java类。但是我的理解是@Consumes(MediaType.APPLICATION_JSON)注释足以让Jax RS解析json请求到java对象。还是我的班级需要其他注释?这是我的整个项目。
我也不确定我在pom.xml
中定义的依赖项。
我们将不胜感激。预先感谢。
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.thomsoncodes</groupId>
<artifactId>demobank</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>demobank</name>
<build>
<finalName>demobank</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>
<!-- uncomment this to get JSON support
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
-->
</dependencies>
<properties>
<jersey.version>2.16</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
我的控制器类
@Path("/customerinfo")
public class CustomerInfoController {
@POST
@Path("/greeting")
@Consumes(MediaType.TEXT_PLAIN)
@Produces(MediaType.TEXT_PLAIN)
public String greetings(String message) {
return "Hello " + message;
}
@POST
@Path("/newcustomer")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public Response createNewCustomer(Customer customer) {
String result = "New customer is created : " + customer;
return Response.status(201).entity(result).build();
}
}
我的对象类
public class Customer {
private String firstName;
private String midName;
private String lastName;
private String citizenship;
private String dob;
private String ssn;
private String city;
private String state;
private String country;
private String email;
private String phone;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getMidName() {
return midName;
}
public void setMidName(String midName) {
this.midName = midName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getCitizenship() {
return citizenship;
}
public void setCitizenship(String citizenship) {
this.citizenship = citizenship;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getSsn() {
return ssn;
}
public void setSsn(String ssn) {
this.ssn = ssn;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
这是邮递员的请求正文
Method - POST
Header - content-type:application/json
Body - {
"firstName" : "John",
"midName" : "Null",
"lastName" : "Doe",
"citizenship" : "USA",
"dob" : "MM/DD/YYYY",
"ssn" : "1868138163",
"city" : "City",
"state" : "State","country" : "USA",
"email":"email@example.com",
"phone" : "1234567890"
}
答案 0 :(得分:2)
但是我的理解是@Consumes(MediaType.APPLICATION_JSON)注释足以让Jax RS解析对Java对象的json请求
不。那不是它的作用。如this post中所述,其目的是进行内容协商。
反序列化实际上是Entity provider(或MessageBodyReader / Wrider)。并且,如果找不到提供程序来处理转换,则会收到415错误。在您的情况下,您使用的JSON提供程序是MOXy,您可以在依赖项中看到它
<!-- uncomment this to get JSON support
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
-->
MOXy的优点是它基于JAXB构建,因此,它需要使用相同的注释。使用JAXB,我们需要用@XmlRootElement
注释模型。因此,如果将其添加到模型类中,它将可以正常工作。
如果您不想使用注释,可以使用Jackson代替MOXy,我仍然建议这样做。只需将上述artifactId更改为jersey-media-json-jackson
。