JQuery,Spring MVC @RequestBody和JSON

我想要一个双向的JSON到Java序列化

我正在成功使用Java to JSON to JQuery path ...( @ResponseBody )例如

@RequestMapping(value={"/fooBar/{id}"}, method=RequestMethod.GET)
     public @ResponseBody FooBar getFooBar(
            @PathVariable String id,
            HttpServletResponse response , ModelMap model) {
        response.setContentType("application/json");
...
}

和我在使用JQuery

$.getJSON('fooBar/1', function(data) {
    //do something
});

很有效 (例如注释已经工作,这要感谢所有的答复者)

但是,如何做相反的路径:使用RequestBody将JSON序列化为Java对象?

无论我尝试什么,我都无法像这样工作:

@RequestMapping(value={"/fooBar/save"}, method=RequestMethod.POST)
public String saveFooBar(@RequestBody FooBar fooBar,
        HttpServletResponse response , ModelMap model) {

  //This method is never called. (it does when I remove the RequestBody...)
}

我有杰克逊配置正确(它在出路序列化),我有MVC设置为注释驱动当然

我如何使它工作? 有没有可能? 或者是Spring / JSON / JQuery是单向的(out)?


更新:

我改变了这个杰克逊设置

<bean id="jsonHttpMessageConverter"
    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />

<!-- Bind the return value of the Rest service to the ResponseBody. -->
<bean
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
        <util:list id="beanList">
            <ref bean="jsonHttpMessageConverter" />
<!--            <ref bean="xmlMessageConverter" /> -->              
        </util:list>
    </property>
</bean>

到(几乎类似的)建议

<bean id="jacksonMessageConverter"
    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jacksonMessageConverter" />
            </list>
        </property>
    </bean> 

它似乎工作! 我不知道这个诀窍究竟是什么,但它有效。


我很确定你只需要注册MappingJacksonHttpMessageConverter

(最简单的方法是通过XML中的<mvc:annotation-driven />或Java中的@EnableWebMvc

看到:

  • 这个论坛帖子和
  • 7.6.5在Spring MVC中配置格式化

  • 这是一个工作示例:

    Maven POM

    <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>test</groupId><artifactId>json</artifactId><packaging>war</packaging>
        <version>0.0.1-SNAPSHOT</version><name>json test</name>
        <dependencies>
            <dependency><!-- spring mvc -->
                <groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>3.0.5.RELEASE</version>
            </dependency>
            <dependency><!-- jackson -->
                <groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-asl</artifactId><version>1.4.2</version>
            </dependency>
        </dependencies>
        <build><plugins>
                <!-- javac --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version><configuration><source>1.6</source><target>1.6</target></configuration></plugin>
                <!-- jetty --><plugin><groupId>org.mortbay.jetty</groupId><artifactId>jetty-maven-plugin</artifactId>
                <version>7.4.0.v20110414</version></plugin>
        </plugins></build>
    </project>
    

    在文件夹src / main / webapp / WEB-INF中

    web.xml中

    <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
        version="2.4">
        <servlet><servlet-name>json</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>json</servlet-name>
            <url-pattern>/*</url-pattern>
        </servlet-mapping>
    </web-app>
    

    JSON-servlet.xml中

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
                            http://www.springframework.org/schema/beans/spring-beans.xsd">
    
        <import resource="classpath:mvc-context.xml" />
    
    </beans>
    

    在文件夹src / main / resources中:

    MVC-的context.xml

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    
        <mvc:annotation-driven />
        <context:component-scan base-package="test.json" />
    </beans>
    

    在文件夹src / main / java / test / json中

    TestController.java

    @Controller
    @RequestMapping("/test")
    public class TestController {
    
        @RequestMapping(method = RequestMethod.POST, value = "math")
        @ResponseBody
        public Result math(@RequestBody final Request request) {
            final Result result = new Result();
            result.setAddition(request.getLeft() + request.getRight());
            result.setSubtraction(request.getLeft() - request.getRight());
            result.setMultiplication(request.getLeft() * request.getRight());
            return result;
        }
    
    }
    

    Request.java

    public class Request implements Serializable {
        private static final long serialVersionUID = 1513207428686438208L;
        private int left;
        private int right;
        public int getLeft() {return left;}
        public void setLeft(int left) {this.left = left;}
        public int getRight() {return right;}
        public void setRight(int right) {this.right = right;}
    }
    

    Result.java

    public class Result implements Serializable {
        private static final long serialVersionUID = -5054749880960511861L;
        private int addition;
        private int subtraction;
        private int multiplication;
    
        public int getAddition() { return addition; }
        public void setAddition(int addition) { this.addition = addition; }
        public int getSubtraction() { return subtraction; }
        public void setSubtraction(int subtraction) { this.subtraction = subtraction; }
        public int getMultiplication() { return multiplication; }
        public void setMultiplication(int multiplication) { this.multiplication = multiplication; }
    }
    

    您可以通过执行mvn jetty:run来测试此设置mvn jetty:run在命令行上mvn jetty:run ,然后发送POST请求:

    URL:        http://localhost:8080/test/math
    mime type:  application/json
    post body:  { "left": 13 , "right" : 7 }
    

    我使用海报Firefox插件来做到这一点。

    以下是响应的内容:

    {"addition":20,"subtraction":6,"multiplication":91}
    

    另外你还需要确定你有

     <context:annotation-config/> 
    

    在您的SPring配置xml中。

    我也会建议你阅读这篇博文。 这对我帮助很大。 Spring博客 - Spring 3.0中的Ajax简化

    更新:

    只是检查我的工作代码,我有@RequestBody工作正常。 我的配置中也有这个bean:

    <bean id="jacksonMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
     <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
      <list>
        <ref bean="jacksonMessageConverter"/>
      </list>
    </property>
    </bean>
    

    可能会很高兴看到Log4j在说什么。 它通常会提供更多信息,根据我的经验,如果请求的内容类型不是Application/JSON@RequestBody将失败。 您可以运行Fiddler 2来测试它,甚至Mozilla Live HTTP头插件也可以提供帮助。


    除了这里的答案...

    如果你在客户端使用jQuery,这对我有用:

    Java的:

    @RequestMapping(value = "/ajax/search/sync") 
    public String sync(@RequestBody Foo json) {
    

    Jquery(您需要包含Douglas Crockford的json2.js才能拥有JSON.stringify函数):

    $.ajax({
        type: "post",
        url: "sync", //your valid url
        contentType: "application/json", //this is required for spring 3 - ajax to work (at least for me)
        data: JSON.stringify(jsonobject), //json object or array of json objects
        success: function(result) {
            //do nothing
        },
        error: function(){
            alert('failure');
        }
    });
    
    链接地址: http://www.djcxy.com/p/48807.html

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