request.getParameter problem with request.getAttribute

action equally with request.setAttribute ("boxType", boxType);
jsp return value is returned with a jsp
action in two ways
add method returns the value of the use request.getParameter can get to the
edit method returns a value with request.getParameter can not get to the (null), which can be used request.getAttribute take to


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picture also gives you played ...
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been resolved.
request.getParameter jsp ---- jsp
request.getAttribute action ----- jsp