$.ajax({
  type: "post",
   url:'apply/mystudent.action?',
  cache: false,
  dataType : "json",
  success: function(data){
   
   $.each(data, function(commentIndex, comment){
         
            alert("姓名"+ comment['names']);
        
            alert("学号"+comment['number']);

         });
                 }
                }); 

public String mystudent() throws Exception{
 List list=priceService.query();//调用接口实现类
 
 this.jsonUtil(list);
 
 return null;
 }

 // 调用json工具方法，传入参数alist
 public void jsonUtil(Object accountlist) throws Exception {
 HttpServletResponse response = ServletActionContext.getResponse();
 log.info("JSON格式：" + accountlist.toString());

 String returnJson = JsonConvert.returnJson(accountlist);
 response.setCharacterEncoding("utf-8");
 response.getWriter().println(returnJson);
 }

import java.io.StringWriter;

import org.codehaus.jackson.map.ObjectMapper;

public class JsonConvert {
 static String jsonStr;
 public static String returnJson(Object object) throws Exception{
 ObjectMapper objectMapper = new ObjectMapper();
 StringWriter stringWriter = new StringWriter();
 objectMapper.writeValue(stringWriter, object);
 
 jsonStr = stringWriter.toString();
 return jsonStr;
 }
}