为什么我不能在spring mvc中使用jackson进行http响应？答案

【问题标题】：Why can't I http response using jackson in spring mvc?为什么我不能在spring mvc中使用jackson进行http响应？
【发布时间】：2015-05-24 11:27:02
【问题描述】：

我使用spring mvc开发了一个服务器程序。我需要使用杰克逊输出数据。我在 servlet-context.xml 中添加。但是，服务器响应有错误http status 406。此请求标识的资源只能生成具有根据请求“接受”标头不可接受的特征的响应。为什么我不能在服务器中使用 jackson 进行 http 响应？使用eclipse的spring项目中的accept header在哪里？

这是我的 servlet-context.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:tx="http://www.springframework.org/schema/tx"
	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/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.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/" />

	<!-- Resolves views selected for rendering by @Controllers to .jsp resources 
		in the /WEB-INF/views directory -->
	<beans:bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>

	<beans:bean
		class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
		<beans:property name="favorPathExtension" value="true" />
		<beans:property name="ignoreAcceptHeader" value="true" />

		<beans:property name="mediaTypes">
			<beans:map>
				<beans:entry key="json" value="application/json" />
				<beans:entry key="html" value="text/html" />
			</beans:map>
		</beans:property>
	</beans:bean>

	<context:component-scan base-package="kr.ac.jbnu.jinggumdari" />

	<beans:bean
		class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

	<beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<beans:property name="url"
			value="jdbc:mysql://localhost:3306/jinggumdari" />
		<beans:property name="username" value="root" />
		<beans:property name="password" value="mysql1234" />
	</beans:bean>

	<!-- Hibernate 4 SessionFactory Bean definition -->
	<beans:bean id="hibernate4AnnotatedSessionFactory"
		class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<beans:property name="dataSource" ref="dataSource" />
		<beans:property name="annotatedClasses">
			<beans:list>
				<beans:value>kr.ac.jbnu.jinggumdari.model.Member</beans:value>
			</beans:list>
		</beans:property>
		<beans:property name="hibernateProperties">
			<beans:props>
				<beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
				</beans:prop>
				<beans:prop key="hibernate.show_sql">true</beans:prop>
			</beans:props>
		</beans:property>
	</beans:bean>

	<beans:bean id="memberDAO" class="kr.ac.jbnu.jinggumdari.DAO.MemberDAOImpl">
		<beans:property name="sessionFactory"
			ref="hibernate4AnnotatedSessionFactory" />
	</beans:bean>
	<beans:bean id="memberService"
		class="kr.ac.jbnu.jinggumdari.serviceImplementation.MemberManageServiceImpl">
		<beans:property name="memberDAO" ref="memberDAO"></beans:property>
	</beans:bean>

	<beans:bean id="reviewDAO" class="kr.ac.jbnu.jinggumdari.DAO.ReviewDAOImpl">
		<beans:property name="sessionFactory"
			ref="hibernate4AnnotatedSessionFactory" />
	</beans:bean>
	<beans:bean id="reviewService"
		class="kr.ac.jbnu.jinggumdari.serviceImplementation.ReviewManageServiceImpl">
		<beans:property name="reviewDAO" ref="reviewDAO"></beans:property>
	</beans:bean>

	<tx:annotation-driven transaction-manager="transactionManager" />

	<beans:bean id="transactionManager"
		class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<beans:property name="sessionFactory"
			ref="hibernate4AnnotatedSessionFactory" />
	</beans:bean>
</beans:beans>

这是我的 pom.xml

<?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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.jbnu</groupId>
	<artifactId>jinggumdari</artifactId>
	<name>server</name>
	<packaging>war</packaging>
	<version>1.0.0-BUILD-SNAPSHOT</version>
	<properties>
		<java-version>1.6</java-version>
		<org.springframework-version>4.1.5.RELEASE</org.springframework-version>
		<org.aspectj-version>1.8.5</org.aspectj-version>
		<org.slf4j-version>1.6.6</org.slf4j-version>
		<hibernate.version>4.3.9.Final</hibernate.version>
		<jackson.version>1.9.13</jackson.version>
	</properties>
	<dependencies>
		<!-- 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>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

		<!-- AspectJ -->
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjrt</artifactId>
			<version>${org.aspectj-version}</version>
		</dependency>
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>${org.aspectj-version}</version>
		</dependency>


		<!-- Logging -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>${org.slf4j-version}</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>jcl-over-slf4j</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.15</version>
			<exclusions>
				<exclusion>
					<groupId>javax.mail</groupId>
					<artifactId>mail</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.jms</groupId>
					<artifactId>jms</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jdmk</groupId>
					<artifactId>jmxtools</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jmx</groupId>
					<artifactId>jmxri</artifactId>
				</exclusion>
			</exclusions>
			<scope>runtime</scope>
		</dependency>

		<!-- @Inject -->
		<dependency>
			<groupId>javax.inject</groupId>
			<artifactId>javax.inject</artifactId>
			<version>1</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>


		<!-- Test -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.7</version>
			<scope>test</scope>
		</dependency>

		<!-- Hibernate -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>${hibernate.version}</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-entitymanager</artifactId>
			<version>${hibernate.version}</version>
		</dependency>

		<!-- JDBC -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.30</version>
		</dependency>

		<!-- javax.persistence -->
		<dependency>
			<groupId>javax.persistence</groupId>
			<artifactId>persistence-api</artifactId>
			<version>1.0.2</version>
		</dependency>

		<!-- apache DBCP -->
		<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>1.4</version>
		</dependency>

		<!-- JSON -->
		<dependency>
			<groupId>org.codehaus.jackson</groupId>
			<artifactId>jackson-mapper-asl</artifactId>
			<version>${jackson.version}</version>
		</dependency>
		<dependency>
			<groupId>org.codehaus.jackson</groupId>
			<artifactId>jackson-core-asl</artifactId>
			<version>${jackson.version}</version>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<artifactId>maven-eclipse-plugin</artifactId>
				<version>2.9</version>
				<configuration>
					<additionalProjectnatures>
						<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
					</additionalProjectnatures>
					<additionalBuildcommands>
						<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
					</additionalBuildcommands>
					<downloadSources>true</downloadSources>
					<downloadJavadocs>true</downloadJavadocs>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.5.1</version>
				<configuration>
					<source>1.6</source>
					<target>1.6</target>
					<compilerArgument>-Xlint:all</compilerArgument>
					<showWarnings>true</showWarnings>
					<showDeprecation>true</showDeprecation>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.codehaus.mojo</groupId>
				<artifactId>exec-maven-plugin</artifactId>
				<version>1.2.1</version>
				<configuration>
					<mainClass>org.test.int1.Main</mainClass>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

这是我的项目浏览器

【问题讨论】：

发布您的控制器...首先使用 Jackson 2，因为 Spring 4.x 放弃了对 jackson 1 的支持。
同时发布您的调用代码。这就是设置接受标头的原因。

标签： java json spring spring-mvc

【解决方案1】：

添加

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>${jackson.version}</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>${jackson.version}</version>
</dependency>

在你的 pom.xml 中使用最新的 jackson

【讨论】：