Study：SpringMVC3.2处理ajax请求

 jsp页面如下：

	<form id="myForm" method="post" action="/mvc/student/add">
		<table>
			<tr>
				<td>姓名</td>
				<td><input id="name" name="name" value="${name}" /></td>
			</tr>
			<tr>
				<td>性別</td>
				<td>男<input type="radio" name="sex" value="1" />女<input
					type="radio" name="sex" value="0" />
				</td>
			</tr>
			<tr>
				<td>祖籍</td>
				<td><select name="home">
						<option value="0">请选择</option>
						<option value="云南">云南</option>
						<option value="湖南">湖南</option>
						<option value="广东">广东</option>
				</select></td>
			</tr>
			<tr>
				<td><input type="button" value="保存" onclick="validate()" /></td>
			</tr>
		</table>
	</form>

jsp中的js方法如下：

<script type="text/javascript">
	function validate(){
		var name = $("#name");
		if(null == name.val() || "" == name.val()){
			alert("请输入姓名！");
			name.focus();
			return;
		}
		var sex = $('input[name="sex"]:checked');
		if(sex.length == 0){
			alert("请选择性别！");
			$('input[name="sex"]')[0].focus();
			return;
		}
		var home = $('select[name="home"]').find('option:selected');
		if(home.val() == 0){
			alert("请选择祖籍!");
			$('select[name="home"]').focus();
			return;
		}
		$.ajax(
				{ 
					url: "/mvc/student/add",
					type:"POST",
					//data:"name="+name.val()+"&sex="+sex.val()+"&home="+home.val(),
					data:{
						name:name.val(),
						sex:sex.val(),
						home:home.val()
					},
					dataType:'text',
					success: function(result){
						alert(result);
					}
      			}
		 );
	}
</script>

以上两种格式的data经过测试都可以请求。

 

Controller代码如下：

@Controller
@RequestMapping("student")
public class StudentController {
	@Autowired
	StudentService studentService;
	
	@RequestMapping(value="add",method={RequestMethod.GET})
	public String add() {
		return "addStudent";
	}
	
	@RequestMapping(value="add",method={RequestMethod.POST})
	@ResponseBody
	public Student add(Student student) {
		return studentService.add(student);
	}
}

 

最重要的一个地方，就是springmvc配置文件。

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">
    <description>springmvc配置</description>    
	<!-- 自动扫描且只扫描@Controller，service必须在application中加载好并且加上事务，否则此时关联到的service没有事务。-->
	<context:component-scan base-package="com.*">
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service" />
	</context:component-scan>
	<!-- 
	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
	 -->
	<mvc:annotation-driven />
    <mvc:default-servlet-handler/>
	
	<!-- ViewResolver -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

 以上配置文件几乎没任何地方提到对于json的处理。网上查了很多例子，都提到需要在Adapter中配置Converter。但我这里的配置真没有像那样处理，我猜想跟版本有关系，得空再调试看看spring内部是如何自处理的。或许那样的配置有什么特别的之处，我现在还没接触到。唯一不同地方是引入的jar包。

		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-core</artifactId>
			<version>2.0.0</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-annotations</artifactId>
			<version>2.0.0</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.0.0</version>
		</dependency>