springMVC：前端请求后台并传值

@RequestMapping(value="/product?") // 可匹配“/product1”或“/producta”，但不匹配“/product”或“/productaa”;
@RequestMapping(value="/product*") // 可匹配“/productabc”或“/product”，但不匹配“/productabc/abc”;
@RequestMapping(value="/product/*") // 可匹配“/product/abc”，但不匹配“/productabc”;
@RequestMapping(value="/products/**/{productId}") // 可匹配“/products/abc/abc/123”或“/products/123”，也就是Ant风格和URI模板变量风格可混用;

// 处理post 就换成 POST 
@RequestMapping (value="/start",method=RequestMethod.GET)

  @RequestMapping(value = { "list", "" })
  //如果请求不倒url1就会请求url2
  @RequestMapping(value = { "url1", "url1" })

<form>
  title:<input type="text" name="title"/>
  content:<input type="text" name="content"/>
  <input type="submit" value="提交"/>
</form>

      function save(postsId,userId,userNick) {
        $.ajax({
          type : "POST",
          url : '/posts/save',
          dataType : "json",
          data : {
            title: "这里是标题",
            content :"这里是内容"
          },
          success : function(data, textStatus, jqXHR) {
            alert("异步方法提交")
          }
        });
} 

  //easyui的 load 事件中传递给url的参数不能过多
  //全部放到一个json变量中，然后作为load的参数就行了，jquery会自动调用这个方法处理json对象为键值对
  eg:var params={a:1,b:2,c:3,d:4,e:5/*...其他更多的*/}
  $('#dg').datagrid('load',params );
       //查询
      function search(){
        //定义一个model  实际也是json对象
        /*var params={
            org:$('#org').val(),
            beginTime:$('#beginTime').datebox('getValue'),
            endTime:$('#endTime').datebox('getValue'),
        }*/
        var org = $("input[name='org']").val();
        var beginTime = $('#beginTime').datebox('getValue');
        var endTime = $('#endTime').datebox('getValue');
        //json对象
        var params = {org:org,beginTime:beginTime,endTime:endTime};
         $("#dg").datagrid('load',params);
      };

     @RequestMapping(value = "/{id}/{str}")
     public ModelAndView helloWorld(@PathVariable String id, @PathVariable String str) {
       System.out.println(id);
       System.out.println(str);
     return new ModelAndView("/helloWorld");
}

public void saveComment(String title,String content) {
}

    @RequestMapping(method = RequestMethod.POST)
    public String processSubmit(@ModelAttribute("pojo") Pojo pojo) {
      return "helloWorld";
 }

public void saveComment(Pojo pojo) {}

@RequestMapping(method = RequestMethod.GET)
public String get(HttpServletRequest request, HttpServletResponse response) {
 String org = request.getParameter("org");
 System.out.println(org);
 return "helloWorld";
}

//当请求参数a不存在时会有异常发生,可以通过设置属性required=false解决
@RequestParam(value="a", required=false)
@RequestMapping(value = "/requestParam", method = RequestMethod.GET)
public String setupForm(@RequestParam("a") String a, ModelMap model) {
 System.out.println(a);
 return "helloWorld";
} 
public void saveComment(@RequestParam("title") String title,@RequestParam("content")String content) {
}

//@RequestParam  Map 接收不定参数
@RequestMapping(value = "/call", produces = "text/html;charset=UTF-8")  
@ResponseBody  
    public String callback(@RequestParam Map<String, String> params) {  
       return null;  
    }