Unlike updating a part of screen by Ajax, this is a traditional(?), and a basic way: to Submit an entire form.

Summarized as three steps:

1. SUBMIT button is pressed, and passes an Forms (Object) to the controller method.
2. The Controller method takes the Object and Register (Insert/Update) to the data base
3. Return a String as JSP name

The Detail of Step 1

@RequestMapping(value = "/cUrlValAttrbMain01Jsp", params = "submitHdr", method = RequestMethod.POST)
public String submitHdr(@ModelAttribute("RmaHdrModel") RmaHdrModel rma, HttpServletRequest req) {
	RmaBL.saveHdr(rma, req);
	return VIEW.REDIRECT_HOME.getVal();
}

1.1. “cUrlValAttrbMain01Jsp” is defined in main_01.jsp.

<c:url var="addAction" value="/cUrlValAttrbMain01Jsp.html" ></c:url>
<form:form action="${addAction}" commandName="rmaMapKey">

1.2. “submitHdr” is “name” attribute in “Submit” button in main_01.jsp.

<input type="submit" value="Submit" name="submitHdr" style="height:25px; width:150px; color: #F6FDA4; background-color: #CC0000; font-face: 'Comic Sans MS';"/>

1.3. @ModelAttribute specifies an argument in the Controller class RmaController.java.
1.4. The parameter “RmaHdrModel rma” takes the form object from JSP.

The Detail of Step 2 & 3

@RequestMapping(value = "/cUrlValAttrbMain01Jsp", params = "submitHdr", method = RequestMethod.POST)
public String submitHdr(@ModelAttribute("RmaHdrModel") RmaHdrModel rma, HttpServletRequest req) {
	RmaBL.saveHdr(rma, req);
	return VIEW.REDIRECT_HOME.getVal();
}

2.1. RmaBL.saveHdr does insert/update to the Database

public static RMA_HDR saveHdr(RmaHdrModel rma, HttpServletRequest req) {
	RMA_HDR obj = new RMA_HDR(rma);
	if (rma.getId() == 0) {
		hdrSvc.save(obj);
		// Set RMA# with formatted
		DecimalFormat df = new DecimalFormat("000000");
		obj.setRmaNum("RMA" + df.format((double) obj.getId()));
	}
	hdrSvc.update(obj);
	req.getSession().removeAttribute(CONST.HDR_LIST.getVal());
	return obj;
}

3.1. “VIEW.REDIRECT_HOME.getVal()” returns a string “redirect:/ns-home” from a constant class and redirect to the method initialize the screen

enum VIEW {
	
	MAIN_01("main_01"),
	SUB_LINE_01("sub_line_01"),
	SUB_TP_01("sub_tp_01"),
	SUB_RSN_01("sub_rsn_01"),
	SUB_TP_RSN_01("sub_tp_rsn_01"),
	REDIRECT_HOME("redirect:/ns-home")
	;
	
	private String code;

	VIEW(String code) {
		this.code = code;
	}

	public String getVal() {
		return code;
	}
}