你的url地址,就是报表地址错了
正常,report?后面还有viewlet=XXXX.cpt
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window.open(FR.cjkEncode("${servletURL}?report?viewlet=订单明细表.cpt&ID="+ ID + "format=excel"));
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window.open(FR.cjkEncode("/webroot/decision/view/report?viewlet=/report/订单明细表.cpt&ID="+ ID + "format=excel"));