菜鸟笔记

public static void main(String[] args) { Calendar ca = Calendar.getInstance(); int year = ca.get(Calendar.YEAR);//获取年份 int month=ca.get(Calendar.MONTH);//获取月份 int day=ca.get(Calendar.

1. List集合转换成json代码List list = new ArrayList();list.add( "first" );list.add( "second" );JSONArray jsonArray2 = JSONArray.fromObject( list );2. Map集合转换成json代码Map map = new HashMap();map.pu

JSON 使用须要用的JAR包：commons-lang.jarcommons-beanutils.jarcommons-collections.jarcommons-logging.jarezmorph.jarjson-lib-2.2.2-jdk15.jar使用JSON中的JSONObject：1.创建一个JSONObject对象，并使用put();方法添加元

@RequestMapping("/addUser3")  public void add3(HttpServletRequest request,HttpServletResponse response) throws IOException{      response.setContentType("application/json;charset=utf-8");      PrintWr

如：数据表：A1字段：B1，B2，B3数据：Y1，Y2，Y3很多条记录 数据表：A2字段：B1，B2数据：Y1，Y2SELECT A1.B1, A1.B2, A1.B3FROM A1 INNER JOIN A2 ON A1.B1 = A2.B1 AND A1.B2 = A2.B2 and A2.B3 = 1

@RequestMapping("/list")public String selectuser(User user, HttpServletRequest request, HttpServletResponse response, Model model){ int defaultPageSize = 2; Page us

form:form name="tb" modelAttribute="task" id="searchForm" action="" method="post"> id="text1" value="" type="text" class="form-control" name="searchKey" placeholder="搜索"> href="" c