{"provider_url":"https://hatena.blog","blog_title":"R42\u65e5\u8a18","author_name":"takahashikzn","title":"OGNL\u5f0f\u3067\u5b58\u5728\u3057\u306a\u3044\u30d7\u30ed\u30d1\u30c6\u30a3\u3078\u30a2\u30af\u30bb\u30b9","type":"rich","categories":["Java","Struts2","OGNL"],"provider_name":"Hatena Blog","height":"190","version":"1.0","blog_url":"https://takahashikzn.root42.jp/","published":"2009-07-06 20:31:30","image_url":null,"author_url":"https://blog.hatena.ne.jp/takahashikzn/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftakahashikzn.root42.jp%2Fentry%2F20090706%2F1246879890\" title=\"OGNL\u5f0f\u3067\u5b58\u5728\u3057\u306a\u3044\u30d7\u30ed\u30d1\u30c6\u30a3\u3078\u30a2\u30af\u30bb\u30b9 - R42\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","url":"https://takahashikzn.root42.jp/entry/20090706/1246879890","description":"\u5148\u7a0b\u307e\u3067\u3001OGNL\u5f0f\u306e\u8b0e\u306e\u4f8b\u5916\u306b\u60a9\u307e\u3055\u308c\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001 Caused by: java.lang.NullPointerException at com.opensymphony.xwork2.ognl.OgnlValueStack.checkForInvalidProperties(OgnlValueStack.java:298) at com.opensymphony.xwork2.ognl.OgnlValueStack.findValue(OgnlValueStack.java:237) at org.apache.struts2.components.Component.findVa\u2026"}