我需要编写一个接受 XML/JSON 作为输入(POST 方法)和 XML/JSON 作为输出(基于输入格式)的休息服务。我尝试了以下方法来实现这一点,但没有帮助。Endpoint 方法接受 XML/JSON,但在响应时它总是根据 @RequestMapping -produces 中指定的顺序给出 JSON 或 XML。任何帮助将不胜感激.
我的端点方法:
@RequestMapping(value = "/getxmljson", method = RequestMethod.POST,produces={"application/json","application/xml"},
consumes={"application/json", "application/xml"})
public @ResponseBody Student processXMLJsonRequest(@RequestBody Student student)
throws Exception {
System.out.println("*************Inside Controller");
return student;
}
POJO类:Student.java
import java.io.Serializable;
import java.util.ArrayList;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
@XmlRootElement(name = "student")
@XmlType(propOrder = {"id", "name", "graduationTime", "courses"})
@JsonPropertyOrder({"id", "name", "graduationTime", "courses"})
public class Student implements Serializable {
private static final long serialVersionUID = 1L;
private int id;
private String name;
private String graduationTime;
private ArrayList<Course> courses = new ArrayList<Course>();
@XmlElement
public int getId() { return id; }
@XmlElement
public String getName() { return name; }
@XmlElement
public String getGraduationTime() { return graduationTime; }
@XmlElement
public ArrayList<Course> getCourses() { return courses; }
public void setId(int value) { this.id = value; }
public void setName(String value) { this.name = value; }
public void setGraduationTime(String value) { this.graduationTime = value; }
public void setCourses(ArrayList<Course> value) { this.courses = value; }
@JsonIgnore
public String toString() {
return this.name + " - "
+ graduationTime == null? "Unknown" : graduationTime.toString();
}
public Student() {}
public Student(int id, String name, String graduationTime) {
this.id = id;
this.name = name;
this.graduationTime = graduationTime;
}
}
POJO类:Course.java
import java.io.Serializable;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
@XmlRootElement(name = "course")
@XmlType(propOrder = {"courseName", "score"})
@JsonPropertyOrder({"courseName", "score"})
public class Course implements Serializable {
private static final long serialVersionUID = 1L;
private String courseName;
private Integer score;
public @XmlElement String getCourseName() { return courseName; }
public @XmlElement Integer getScore() { return score; }
public void setCourseName(String value) { courseName = value; }
public void setScore(Integer value) { score = value; }
public Course() {}
public Course(String courseName, Integer score) {
this.courseName = courseName;
this.score = score;
}
}
spring-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:sws="http://www.springframework.org/schema/web-services"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:oxm="http://www.springframework.org/schema/oxm"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/web-services
http://www.springframework.org/schema/web-services/web-services-2.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing
infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving
up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Configure to plugin JSON as request and response in method handler -->
<beans:bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<beans:property name="messageConverters">
<beans:list>
<beans:ref bean="jsonMessageConverter" />
<beans:ref bean="xmlMessageConverter" />
</beans:list>
</beans:property>
</beans:bean>
<!-- Configure bean to convert JSON to POJO and vice versa -->
<beans:bean id="jsonMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
</beans:bean>
<beans:bean id="xmlMessageConverter"
class="org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter">
</beans:bean>
<beans:bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
</beans:bean>
<beans:bean id="objectMapper" class="com.fasterxml.jackson.databind.ObjectMapper" />
<context:component-scan base-package="com.test" />
</beans:beans>
JSON 输入:
{
"id":2014,
"name":"test",
"graduationtime":"09/05/2014",
"courses":[
{
"courseName":"Math",
"score":150
},
{
"courseName":"Che",
"score":150
}
]
}
XML 输入:
<?xml version="1.0" encoding="UTF-8" ?>
<student>
<id>2014</id>
<name>test</name>
<graduationTime>09/05/2014</graduationTime>
<courses>
<courseName>Math</courseName>
<score>150</score>
</courses>
<courses>
<courseName>Che</courseName>
<score>150</score>
</courses>
</student>
原文由 Mohan 发布,翻译遵循 CC BY-SA 4.0 许可协议
使用同一个控制器处理不同数据格式的最佳实践是让框架完成所有确定编组和解组机制的工作。
这里不需要指定
consumes
和produces
。例如,考虑到您将来可能希望使用相同的方法处理其他格式,例如 Google Protocol Buffers、EDI 等。使控制器不受consumes
和produces
的影响让您通过全局配置添加数据格式,而不必修改控制器代码。让视图解析器决定如何读取传入数据以及如何将其写回。
使用正确的 HTTP 标头值命中您的控制器将强制
ContentNegotiatingViewResolver
使用适当的数据表示自动编组和解组数据。如果要以 JSON 格式交换数据,请将两个标头设置为
application/json
。如果您想要 XML,请将两者都设置为application/xml
。如果您不想使用 HTTP 标头(理想情况下您应该使用),您可以简单地添加
.json
或.xml
到 URL 和ContentNegotiatingViewResolver
将做剩下的- .您可以查看 我使用适用于 JSON 和 XML 的代码片段创建的示例应用程序。