我正在开发一个项目（使用SPRING MVC），我创建了一个带有GET，PUT和POST的控制器，它工作正常但是现在如果我尝试POST并且PUT出现错误： 服务器拒绝了此请求，因为请求实体所采用的方法所请求的资源不支持该格式。
我的控制员：
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package zw.co.telecel.camsapi.controllers;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.PersistenceException;
import javax.persistence.Query;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import zw.co.telecel.camsapi.entities.District;
import zw.co.telecel.camsapi.utils.ApiResponse;
import zw.co.telecel.camsapi.utils.Helper;
import zw.co.telecel.camsapi.utils.ResponseCode;
/**
*
* @author prime
*/
@Controller
@RequestMapping("/districts")
public class DistrictController {
private static final Logger logger = Logger.getLogger(UserController.class);
/**
* Gets all districts registered in the system
*
* @return
*/
@RequestMapping(value = "/", method = RequestMethod.GET, produces = "application/json")
@ResponseBody
public ApiResponse getDistricts() {
ApiResponse response = new ApiResponse();
BasicConfigurator.configure();
EntityManagerFactory emf = null;
EntityManager em = null;
try {
emf = Persistence.createEntityManagerFactory(Helper.PERSISTENCE_UNIT_NAME);
em = emf.createEntityManager();
Query query = em.createNamedQuery("District.findAll");
List<District> districts = query.getResultList();
if (districts.isEmpty()) {
logger.info(districts);
response.setCode(ResponseCode.NOT_FOUND);
response.setDescription("NOT_FOUND");
response.setIsSuccess(false);
response.setData(districts);
logger.info(response);
return response;
} else {
logger.info(districts);
response.setCode(ResponseCode.FOUND);
response.setDescription("FOUND");
response.setIsSuccess(true);
response.setData(districts);
logger.info(response);
return response;
}
} catch (PersistenceException ex) {
logger.error(ex);
response.setCode(ResponseCode.FAILED_DEPENDENCY);
response.setDescription("Failed dependency.");
response.setIsSuccess(false);
return response;
} catch (Exception ex) {
logger.error(ex);
response.setCode(ResponseCode.INTERNAL_SERVER_ERROR);
response.setDescription("Failed to process request.");
response.setIsSuccess(false);
return response;
} finally {
if (em != null) {
if (em.isOpen()) {
em.close();
}
}
}
}
/**
* *
* Get district by id
*
* @param id
* @return
*/
@RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = "application/json")
@ResponseBody
public ApiResponse getDistrict(@PathVariable Integer id) {
ApiResponse response = new ApiResponse();
BasicConfigurator.configure();
EntityManagerFactory emf = null;
EntityManager em = null;
try {
emf = Persistence.createEntityManagerFactory(Helper.PERSISTENCE_UNIT_NAME);
em = emf.createEntityManager();
Query query = em.createNamedQuery("District.findById");
query.setParameter("id", id);
List<District> districts = query.getResultList();
if (districts.isEmpty()) {
logger.info(districts);
response.setCode(ResponseCode.NOT_FOUND);
response.setDescription("NOT_FOUND");
response.setIsSuccess(false);
response.setData(districts);
logger.info(response);
return response;
} else {
logger.info(districts);
response.setCode(ResponseCode.FOUND);
response.setDescription("FOUND");
response.setIsSuccess(true);
response.setData(districts);
logger.info(response);
return response;
}
} catch (PersistenceException ex) {
logger.error(ex);
response.setCode(ResponseCode.FAILED_DEPENDENCY);
response.setDescription("Failed dependency.");
response.setIsSuccess(false);
return response;
} catch (Exception ex) {
logger.error(ex);
response.setCode(ResponseCode.INTERNAL_SERVER_ERROR);
response.setDescription("Failed to process request.");
response.setIsSuccess(false);
return response;
} finally {
if (em != null) {
if (em.isOpen()) {
em.close();
}
}
}
}
/**
* *
* Create new district
*
* @param district
* @return
*/
@RequestMapping(value = "/", method = RequestMethod.POST, produces = "application/json", consumes = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public ApiResponse createDistrict(@RequestBody District district) {
ApiResponse response = new ApiResponse();
BasicConfigurator.configure();
EntityManagerFactory emf = null;
EntityManager em = null;
try {
emf = Persistence.createEntityManagerFactory(Helper.PERSISTENCE_UNIT_NAME);
em = emf.createEntityManager();
Query query = em.createNamedQuery("District.findByName");
query.setParameter("name", district.getName());
List<District> districts = query.getResultList();
if (districts.isEmpty()) {
em.getTransaction().begin();
em.persist(district);
em.getTransaction().commit();
logger.info(district);
response.setCode(ResponseCode.CREATED);
response.setDescription("CREATED");
response.setIsSuccess(true);
response.setData(district);
logger.info(response);
return response;
} else {
logger.info(district);
response.setCode(ResponseCode.CONFLICT);
response.setDescription("Conflict");
response.setIsSuccess(false);
logger.info(response);
return response;
}
} catch (PersistenceException ex) {
logger.error(ex);
System.out.println(ex.getMessage());
if (em != null) {
em.getTransaction().rollback();
}
response.setCode(ResponseCode.FAILED_DEPENDENCY);
response.setDescription("Failed dependency.");
response.setIsSuccess(false);
return response;
} catch (Exception ex) {
logger.error(ex);
System.out.println(ex.getMessage());
response.setCode(ResponseCode.INTERNAL_SERVER_ERROR);
response.setDescription("Failed to process request.");
response.setIsSuccess(false);
return response;
} finally {
if (em != null) {
if (em.isOpen()) {
em.close();
}
}
}
}
/**
* *
* Update district
*
* @param district
* @param id
* @return
*/
@RequestMapping(value = "/{id}", method = RequestMethod.PUT, produces = "application/json")
@ResponseBody
public ApiResponse updateDistrict(@PathVariable int id, @RequestBody District district) {
ApiResponse response = new ApiResponse();
BasicConfigurator.configure();
EntityManagerFactory emf = null;
EntityManager em = null;
try {
emf = Persistence.createEntityManagerFactory(Helper.PERSISTENCE_UNIT_NAME);
em = emf.createEntityManager();
District dist = em.find(District.class, id);
em.getTransaction().begin();
dist.setName(district.getName());
dist.setIsActive(district.getIsActive());
dist.setProvinceId(district.getProvinceId());
em.getTransaction().commit();
response.setCode(ResponseCode.CREATED);
response.setDescription("CREATED");
response.setIsSuccess(true);
response.setData(district);
logger.info(response);
return response;
} catch (PersistenceException ex) {
logger.error(ex);
System.out.println(ex.getMessage());
if (em != null) {
em.getTransaction().rollback();
}
response.setCode(ResponseCode.FAILED_DEPENDENCY);
response.setDescription("Failed dependency.");
response.setIsSuccess(false);
return response;
} catch (Exception ex) {
logger.error(ex);
System.out.println(ex.getMessage());
response.setCode(ResponseCode.INTERNAL_SERVER_ERROR);
response.setDescription("Failed to process request.");
response.setIsSuccess(false);
return response;
} finally {
if (em != null) {
if (em.isOpen()) {
em.close();
}
}
}
}
}
我的实体类：
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package zw.co.telecel.camsapi.entities;
import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
/**
*
* @author tinashehondo
*/
@Entity
@Table(name = "District")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "District.findAll", query = "SELECT d FROM District d"),
@NamedQuery(name = "District.findById", query = "SELECT d FROM District d WHERE d.id = :id"),
@NamedQuery(name = "District.findByName", query = "SELECT d FROM District d WHERE d.name = :name"),
@NamedQuery(name = "District.findByIsActive", query = "SELECT d FROM District d WHERE d.isActive = :isActive")})
public class District implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "Id")
private Integer id;
@Basic(optional = false)
@Column(name = "Name")
private String name;
@Basic(optional = false)
@Column(name = "IsActive")
private boolean isActive;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "districtId")
private Collection<Ward> wardCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "districtId")
private Collection<Farm> farmCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "districtId")
private Collection<Farmer> farmerCollection;
@JoinColumn(name = "Province_Id", referencedColumnName = "Id")
@ManyToOne(optional = false)
private Province provinceId;
public District() {
}
public District(Integer id) {
this.id = id;
}
public District(Integer id, String name, boolean isActive) {
this.id = id;
this.name = name;
this.isActive = isActive;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean getIsActive() {
return isActive;
}
public void setIsActive(boolean isActive) {
this.isActive = isActive;
}
@XmlTransient
public Collection<Ward> getWardCollection() {
return wardCollection;
}
public void setWardCollection(Collection<Ward> wardCollection) {
this.wardCollection = wardCollection;
}
@XmlTransient
public Collection<Farm> getFarmCollection() {
return farmCollection;
}
public void setFarmCollection(Collection<Farm> farmCollection) {
this.farmCollection = farmCollection;
}
@XmlTransient
public Collection<Farmer> getFarmerCollection() {
return farmerCollection;
}
public void setFarmerCollection(Collection<Farmer> farmerCollection) {
this.farmerCollection = farmerCollection;
}
public Province getProvinceId() {
return provinceId;
}
public void setProvinceId(Province provinceId) {
this.provinceId = provinceId;
}
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof District)) {
return false;
}
District other = (District) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "zw.co.telecel.camsapi.entities.District[ id=" + id + " ]";
}
}
我的pom文件：
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>zw.co.telecel</groupId>
<artifactId>CAMSAPI</artifactId>
<version>1.0</version>
<packaging>war</packaging>
<name>CAMSAPI</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>4.0.1.RELEASE</spring.version>
<jackson.version>1.9.10</jackson.version>
<jdk.version>1.6</jdk.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<dependencies>
<!-- Spring 3 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Jackson JSON Mapper -->
<!-- <dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>${jackson.version}</version>
</dependency>-->
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.5.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
<version>2.5.2</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
<type>jar</type>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>7.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Postman中出现的错误（注意我已将内容类型设置为'application / json'）：
<body>
<h1>HTTP Status 415 - Unsupported Media Type</h1>
<hr/>
<p>
<b>type</b> Status report
</p>
<p>
<b>message</b>Unsupported Media Type
</p>
<p>
<b>description</b>The server refused this request because the request entity is in a format not supported by the requested resource for the requested method.
</p>
<hr/>
<h3>GlassFish Server Open Source Edition 4.1.1 </h3>
</body>
答案 0 :(得分：0)
这可以通过在请求映射中添加消耗来解决，如下所示：
@RequestMapping(value = "/", method = RequestMethod.GET, produces = "application/json", consumes = MediaType.APPLICATION_JSON_VALUE)