maven需要引入的包

<dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.5.4</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.5.4</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.6</version>
    </dependency>

spring-servlet.xml

<!-- 处理请求时返回json字符串的中文乱码问题 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

jsp页面代码

<script type="text/javascript">
    function f(){
        var saveDataAry=[];  
        var data1={"name":"test","password":"gz"};  
        var data2={"name":"ququ","password":"gr","a":[{"k":"k"}]};  
        saveDataAry.push(data1);
        saveDataAry.push(data2);
        $.ajax({
            type:"POST",
            url:"${pageContext.request.contextPath}/testJson/add.do",
            dataType:"json",      
            contentType:"application/json",               
            data:JSON.stringify(saveDataAry),
            success:function(data){
                                       
            }
         });
    }
</script>
<input type="button" οnclick="f()" value="测试">

java代码

import java.util.List;
import org.springframework.stereotype.Controller;
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 com.alibaba.fastjson.JSONObject;

@Controller
@RequestMapping(value = "/testJson")
public class TestJsonController {

/**
     * 测试json
     * @param user
     * @return
     */
    @RequestMapping(value = "add.do", method = {RequestMethod.POST })
    @ResponseBody  
    public Object add(@RequestBody List<JSONObject> json) {
        try {
            System.out.println(json);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return json;
    }
}