时间格式化和返回数据的封装

返回数据的封装

将返回的数据封装进R中

/**
 * 页面响应entity
 */
public class R extends HashMap<String, Object> {

    private static final long serialVersionUID = 1L;

    public R() {
        put("code", 200);
    }

    public static R error() {
        return error(500, "未知异常，请联系管理员");
    }

    public static R error(String msg) {
        return error(500, msg);
    }

    public static R error(int code, String msg) {
        R r = new R();
        r.put("code", code);
        r.put("msg", msg);
        return r;
    }

    public static R ok(String msg) {
        R r = new R();
        r.put("msg", msg);
        return r;
    }

    public static R ok(Map<String, Object> map) {
        R r = new R();
        r.putAll(map);
        return r;
    }

    public static R ok() {
        return new R();
    }

    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }
}

日期格式化处理

/**
 * 自定义返回JSON 数据格式中日期格式化处理
 */
public class CustomDateTimeSerializer extends JsonSerializer<Date>{

	@Override
	public void serialize(Date value, JsonGenerator gen, SerializerProvider serializers)
			throws IOException {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		sdf.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
		gen.writeString(sdf.format(value));  
	}

}