spring mvc传入参数不仅仅转换为json，还可以直接将json字符串转换为具体的java对象

1.controller层

/**
     * 查看主播资料
     *
     * @return
     */
    @RequestMapping(value = { "/actor_details" }, method = { RequestMethod.POST })
    @ResponseBody
    public ResultObject actorDetails(@RequestBody ActorDetailsRequest req) {
        logger.debug("查看{}主播信息", req.getAid());
        if (req.getAid() == null || req.getAid().equals("null")
                || req.getAid().equals("")) {
            return new ResultObject(ResultCode.NULL_PARAM);
        }
        ActorAndUser result = actorServiceImpl.queryActorData(req.getAid());
        return new ResultObject(result);
    }

2.java bean对象，必须有set/get方法

/**
 * @author LM 本类只存放公共属性,不可实例化
 */
public abstract class CommonRequest implements Serializable {    /**
     *
     */
    private static final long serialVersionUID = 4470502255011343528L;    private Integer pageNum;    private Integer pageSize;    public Integer getPageNum() {
        return pageNum;
    }    public void setPageNum(Integer pageNum) {
        this.pageNum = pageNum;
    }    public Integer getPageSize() {
        return pageSize;
    }    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }}

public class ActorDetailsRequest extends CommonRequest {    /**
     *
     */
    private static final long serialVersionUID = 6674800202496130064L;    private String aid;    public String getAid() {
        return aid;
    }    public void setAid(String aid) {
        this.aid = aid;
    }
}