带有Spring的JQuery / Ajax的JSON请求

  • Z时代
  • 2024-01-10
  • 分类：问答

我是JSON / Spring MVC的新手，正在尝试获取对Spring MVC控制器进行AJAX调用的简单示例-但我一直返回400错误-错误的请求。

搜寻Internet后，我发现这通常是由于未设置适当的内容类型引起的-但是[我相信]我已经做到了。

这是我的AJAX呼叫：

    //validate the object
    var urlString = "/ajax/add/";
    $.ajax({
        type:"POST",
        url: urlString,
        contentType: "application/json; charset=utf-8",
        dataType: "json", 
        data: {value1: 'apples', value2 : 'oranges'},
        success: function(result){
            alert("success");
        },
        error: function(jqXHR, textStatus, errorThrown){
            alert("error:" + textStatus + " exception:" + errorThrown);
        }
    }) ;

而我的控制器：

@Controller
itpublic class AddController {
private static Logger m_log = null;
@RequestMapping(value = "/ajax/add")
public String handle(@RequestBody String json){
    DummyClass dummyRequest;
    try {
        ObjectMapper mapper = new ObjectMapper();
        dummyRequest = mapper.readValue(json, DummyClass.class);
        m_log.info("Value1: " + dummyRequest.getValue1());
        m_log.info("Value2: " + dummyRequest.getValue2());
    }  catch (Exception e) {
    }
    finally{
    }
    return "called";
}

谁能帮我吗？

编辑

这是我用来配置Spring的上下文：

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.project.do" />
<!--<mvc:annotation-driven/> -->
<bean class="com.project.do.interceptors.handler.mapping.HandlerInterceptorAnnotationAwareHandlerMapping "/>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<bean class="com.project.do.viewresolver.ProjectViewResolver" >
    <property name="tilesResolver" ref="tilesResolver" />
    <property name="jspResolver" ref="jspResolver" />
</bean>
<bean id="tilesResolver" class ="org.springframework.web.servlet.view.UrlBasedViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView" />
    <property name="order" value="2" />
</bean>
<bean id="jspResolver"
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/jsp/" />
    <property name="suffix" value=".jsp" />
    <property name="order" value="3" />
</bean>
<bean id ="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
    <property name="definitions" value="/WEB-INF/tiles/tiles.xml" />
    <property name="preparerFactoryClass" value="org.springframework.web.servlet.view.tiles2.SpringBeanPreparerFactory"/>
</bean>
<mvc:resources mapping="/css/**" location="/css/" />
<mvc:resources mapping="/js/**" location="/js/" />
<mvc:resources mapping="/images/**" location="/images/" />
<mvc:resources mapping="/javascript/**" location="/javascript/" />
<mvc:resources mapping="/scripts/**" location="/scripts/" />
<mvc:resources mapping="/styles/**" location="/styles/" />
<mvc:resources mapping="/help/**" location="/help/" />
<!-- <mvc:view-controller path="/" view-name="welcome"/> -->

我应该注意，我在com.project.do.working包中有一个运行Ajax的Controller，但是不工作的Ajax和JSON控制器在同一个com.project.do.not.working包中

回答：

我认为您的请求映射不具有RequestMethod作为POST。我猜默认情况下它接受一个get请求，但是您的AJAX是一个POST请求。尝试如下更改

@RequestMapping(value = "/ajax/add", method = RequestMethod.POST)
public String handle(@RequestBody String json){
}

以上是 带有Spring的JQuery / Ajax的JSON请求 的全部内容， 来源链接： utcz.com/qa/406434.html

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