{"id":354,"date":"2018-06-20T17:53:32","date_gmt":"2018-06-20T09:53:32","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=354"},"modified":"2018-06-20T17:53:32","modified_gmt":"2018-06-20T09:53:32","slug":"jsp%e4%b8%8ejavabean%ef%bc%88%e6%9b%b4%e6%96%b0%e4%b8%ad%ef%bc%89","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/jsp\/354\/","title":{"rendered":"JSP\u4e0eJavabean"},"content":{"rendered":"

JSP\u4e0eJavabean<\/h2>\n

\u6309\u7167Sun\u516c\u53f8\u7684\u5b9a\u4e49\uff0cJavabean\u662f\u4e00\u4e2a\u53ef\u91cd\u590d\u4f7f\u7528\u7684\u8f6f\u4ef6\u7ec4\u4ef6\uff0c\u5b9e\u9645\u4e0aJavabean\u662f\u4e00\u79cd\u7c7b\uff0c\u901a\u8fc7\u5c01\u88c5\u5c5e\u6027\u548c\u65b9\u6cd5\u6210\u4e3a\u5177\u6709\u67d0\u79cd\u529f\u80fd\u6216\u8005\u5904\u7406\u67d0\u4e2a\u5931\u8bef\u7684\u5bf9\u8c61\uff0c\u7b80\u79f0bean\uff0c\u7531\u4e8eJavabean\u662f\u57fa\u4e8eJava\u8bed\u8a00\u7684\uff0c\u56e0\u6b64Javabean\u4e0d\u4f9d\u8d56\u5e73\u53f0\uff0c\u5177\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a
\n\uff081\uff09\u53ef\u4ee5\u5b9e\u73b0\u4ee3\u7801\u7684\u590d\u7528\u6027\u3002
\n\uff082\uff09\u6613\u7f16\u5199\u3001\u6613\u7ef4\u62a4\u3001\u6613\u4f7f\u7528\u3002
\n\uff083\uff09\u53ef\u4ee5\u5728\u4efb\u4f55\u5b89\u88c5\u4e86Java\u8fd0\u884c\u73af\u5883\u7684\u5e73\u53f0\u4e0a\u4f7f\u7528\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\u3002
\nJavabean\u5206\u4e3a\u53ef\u89c6\u7ec4\u4ef6\u548c\u975e\u53ef\u89c6\u7ec4\u4ef6\uff0c\u5728JSP\u4e2d\u4e3b\u8981\u4f7f\u7528\u975e\u53ef\u89c6\u7ec4\u4ef6\uff0c\u5bf9\u4e8e\u975e\u53ef\u89c6\u7ec4\u4ef6\uff0c\u6211\u4eec\u4e0d\u5fc5\u8bbe\u8ba1\u4ed6\u7684\u5916\u89c2\uff0c\u4e3b\u8981\u5173\u5fc3\u4ed6\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002
\n\u7f16\u5199Javabean\u5c31\u662f\u7f16\u5199\u4e00\u4e2aJava\u7c7b\uff0c\u6240\u4ee5\u53ea\u8981\u4f1a\u5199\u7c7b\u5c31\u80fd\u7f16\u5199\u4e00\u4e2aJavabean\uff0c\u8fd9\u4e2a\u7c7b\u521b\u5efa\u7684\u4e00\u4e2a\u5bf9\u8c61\u79f0\u4e3aJavabean\uff0c\u7b80\u79f0bean\u3002\u4e3a\u4e86\u80fd\u8ba9\u4f7f\u7528\u8fd9\u4e2abean\u7684\u5e94\u7528\u7a0b\u5e8f\u6784\u5efa\u5de5\u5177\uff08\u6bd4\u5982JSP\u5f15\u64ce\uff09\u77e5\u9053\u8fd9\u4e2abean\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u53ea\u987b\u5728\u7c7b\u7684\u65b9\u6cd5\u547d\u540d\u4e0a\u9075\u5b88\u4e00\u4e0b\u89c4\u5219\uff1a
\n\uff081\uff09\u5982\u679c\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u7684\u540d\u5b57\u662fxxx\uff0c\u90a3\u4e48\u4e3a\u4e86\u83b7\u53d6\u6216\u66f4\u6539\u6210\u5458\u53d8\u91cf\u7684\u503c\uff0c\u5373\u83b7\u5f97\u6216\u66f4\u6539\u5c5e\u6027\uff0c\u7c7b\u4e2d\u5fc5\u987b\u63d0\u4f9b\u4e24\u4e2a\u65b9\u6cd5\uff1a<\/p>\n

getXxx();\/\/\u7528\u6765\u83b7\u53d6\u5c5e\u6027xxx\nsetXxx();\/\/\u7528\u6765\u4fee\u6539\u5c5e\u6027xxx<\/pre>\n
\uff082\uff09 \u5bf9\u4e8eboolean\u7c7b\u578b\u7684\u6210\u5458\u53d8\u91cf\uff0c\u5141\u8bb8\u4f7f\u7528\u201cis\u201d\u4ee3\u66ff\u4e0a\u9762\u7684get\u548cset\u3002
\n\uff083\uff09\u7c7b\u4e2d\u58f0\u660e\u7684\u65b9\u6cd5\u7684\u8bbf\u95ee\u5c5e\u6027\u90fd\u5fc5\u987b\u662fpublic\u7684\u3002<\/p>\n
\uff084\uff09\u7c7b\u4e2d\u58f0\u660e\u7684\u6784\u9020\u65b9\u6cd5\u5fc5\u987b\u662fpublic\u3001\u65e0\u53c2\u6570\u7684\u3002<\/h4>\n
 <\/p>\n
1.\u4fdd\u5b58bean\u5b57\u8282\u7801<\/h4>\n
\u4e3a\u4e86\u4f7fJSP\u9875\u9762\u4f7f\u7528bean\uff0c\u670d\u52a1\u5668\u5fc5\u987b\u4f7f\u7528\u76f8\u5e94\u7684\u5b57\u8282\u7801\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u3002\u4e3a\u4e86\u8ba9\u670d\u52a1\u5668\u80fd\u627e\u5230\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u5b57\u8282\u7801\u6587\u4ef6\u5fc5\u987b\u4fdd\u5b58\u5728\u7279\u5b9a\u7684\u76ee\u5f55\u4e2d\u3002
\n\u6211\u4eec\u5728Web\u670d\u52a1\u76ee\u5f55\u4e0b\u7684WEB-INF\u4e0b\u5efa\u7acb\u6587\u4ef6 classes\uff0c\u5c06\u8be5\u6587\u4ef6\u5939\u4f5c\u4e3a\u6839\u76ee\u5f55\u4fdd\u5b58\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u4e5f\u5c31\u662f\u8bf4\u6bd4\u5982\u67d0\u7c7bpackage out; \u90a3\u4e48\u5b83\u5bf9\u5e94\u7684\u5b57\u8282\u7801\u6587\u4ef6\u5e94\u8be5\u4fdd\u5b58\u5728WEB-INF\/classes\/out\u4e0b\u3002<\/p>\n
<\/h4>\n
2.\u521b\u5efa\u4e0e\u4f7f\u7528bean<\/h4>\n
\u683c\u5f0f\uff1a<\/p>\n
<jsp:useBean id=\"bean\u7684\u540d\u5b57\" class=\"\u521b\u5efabean\u7684\u5b57\u8282\u7801\u6587\u4ef6\" scope=\"\u6709\u6548\u8303\u56f4\" \/>\n<\/pre>\n
 
\n\u6216\u8005<\/p>\n
<jsp:useBean id=\"bean\u7684\u540d\u5b57\" class=\"\u521b\u5efabean\u7684\u5b57\u8282\u7801\u6587\u4ef6\" scope=\"\u6709\u6548\u8303\u56f4\" >\n<\/jsp:useBean><\/pre>\n
 
\n\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\uff0cclass\u4e2d\u7684\u503c\u9700\u8981\u5e26\u6709\u5305\u540d\u3002
\n <\/p>\n
bean\u7684\u6709\u6548\u8303\u56f4\uff08\u540e\u9762\u4f1a\u6709\u4ee3\u7801\u548c\u6267\u884c\u6548\u679c\uff0c\u6709\u70b9\u96be\u7406\u89e3\uff0c\u591a\u770b\u4e0b\u4ee3\u7801\u548c\u6587\u5b57\u8bf4\u660e\uff09<\/h5>\n
\u8fd9\u4e2a\u6709\u6548\u8303\u56f4\u5c31\u662f\u4e0a\u9762scope\u51b3\u5b9a\u7684\uff0c\u53d6\u503c\u67094\u4e2a\uff0cpage\u3001session\u3001request\u3001application\u3002
\nscope\u7684\u53d6\u503c\u51b3\u5b9a\u4e86JSP\u5f15\u64ce\u5206\u914d\u7ed9\u7528\u6237\u7684bean\u5b58\u6d3b\u65f6\u95f4\uff0c\u56e0\u6b64\u9700\u8981\u7406\u89e3\u5177\u4f53\u610f\u4e49\u3002
\n\u5f53\u53d6page\u65f6
\n\u56de\u60f3JSP\u7684\u8fd0\u884c\u539f\u7406\u548c<%%> java\u7a0b\u5e8f\u7247\uff0c\u5728\u6bcf\u4e00\u4e2a\u7528\u6237\u8bbf\u95eeJSP\u9875\u9762\u65f6\uff0c\u90fd\u4f1a\u53c8\u4e00\u4e2a\u5168\u65b0\u7684\u7ebf\u7a0b\u6267\u884c\u7a0b\u5e8f\u7247\u91cc\u7684\u5185\u5bb9\uff0c\u548c\u5176\u4ed6\u7528\u6237\u4e0d\u4ea7\u751f\u5173\u7cfb\u548c\u5f71\u54cd\u3002\u5f53scope\u53d6page\u65f6\uff0c\u5f53\u9875\u9762\u6267\u884c\u5b8c\u6bd5<\/strong>\uff0cJSP\u5f15\u64ce\u5c31\u4f1a\u91ca\u653ebean\u6240\u5360\u7528\u7684\u5185\u5b58\uff0c\u5373\u4f5c\u7528\u4e8e\u53ea\u5728\u5f53\u524d\u9875\u9762\u6709\u6548\u3002\u540c\u65f6\uff0c\u4e00\u4e2a\u7528\u6237\u5bf9bean\u64cd\u4f5c\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u7528\u6237\u3002
\n\u5f53\u53d6request\u65f6
\nrequest\u7684\u4f5c\u7528\u4e8e\u5c31\u662f\u6574\u4e2a\u8bf7\u6c42\uff0c\u53d1\u9001\uff0c\u6267\u884c\uff0c\u54cd\u5e94\u7684\u4e00\u4e2a\u5b8c\u6574\u7684\u8fc7\u7a0b\uff0c\u5f53\u505a\u51fa\u54cd\u5e94\u4e4b\u540e\uff0cJSP\u5f15\u64ce\u91ca\u653ebean\u6240\u5360\u7528\u7684\u5185\u5b58\u3002\u8fd9\u4e2a\u8303\u56f4\u7565\u5927\u4e8epage\uff0c\u56e0\u4e3a\u5305\u542b\u4e86\u6301\u7eed\u8fde\u63a5\uff08HTTP1.1 \u53ca\u4ee5\u4e0a\u652f\u6301\u4e86\u6301\u7eed\u8fde\u63a5\uff09\u548c\u8bf7\u6c42\u8f6c\u53d1\u7b49\u60c5\u51b5\u3002
\n\u5f53\u53d6session\u65f6
\n\u548csession\u5bf9\u8c61\u7684\u4f5c\u7528\u533a\u95f4\u4e00\u6837\uff0c\u540c\u4e00\u7528\u6237\uff0c\u540c\u4e00Web\u670d\u52a1\u76ee\u5f55\u4e0b\uff0c\u53d1\u5446\u65f6\u95f4\u5185<\/strong>\u6709\u6548\u3002
\n\u5f53\u53d6application\u65f6
\n\u4ece\u670d\u52a1\u5668\u4e00\u5f00\u59cb\u6267\u884c\u670d\u52a1\uff0c\u4e00\u76f4\u5230\u670d\u52a1\u5668\u5173\u95ed\u4e3a\u6b62\u3002<\/strong>\u5168\u5c40\u4f5c\u7528\u3002\u4e00\u4e2a\u7528\u6237\u5bf9\u5176\u7684\u66f4\u6539\u4f1a\u5f71\u54cd\u6240\u6709\u7528\u6237\u3002
\n\u6211\u4eec\u4e0b\u9762\u8d34\u51fa\u51e0\u4e2a\u4ee3\u7801\uff0c\u7136\u540e\u6f14\u793a\u4e0b\u8fd9\u51e0\u79cd\u5c5e\u6027\u503c\u3002
\nexample4_1.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=GB2312\" %>\n<%@ page import=\"out.Circle\"%>\n<HTML><BODY bgcolor=white><Font size=3>\n   <jsp:useBean id=\"circle\" class=\"out.Circle\" scope=\"page\" \/>\n  <%--\u901a\u8fc7\u4e0a\u8ff0JSP\u6807\u8bb0\uff0c\u5ba2\u6237\u83b7\u5f97\u4e86\u4e00\u4e2a\u4f5c\u7528\u57df\u662fpage\uff0c\u540d\u5b57\u662fcircle\u7684bean --%>\n   <%   circle.setRadius(888);\n   %>\n<P>\u5706\u7684\u534a\u5f84\u662f\uff1a<%=circle.getRadius()%>\n<P>\u5706\u7684\u5468\u957f\u662f\uff1a<%=circle.circlLength()%>\n<P>\u5706\u7684\u9762\u79ef\u662f\uff1a<%=circle.circleArea()%>\n<A href=\"\/myfile\/next.jsp\"><BR>next.jsp <\/A>\n<\/BODY><\/HTML><\/pre>\n
 
\nexample4_2.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=GB2312\" %>\n<%@ page import=\"out.Circle\"%>\n<HTML><BODY bgcolor=white><Font size=3>\n   <jsp:useBean id=\"girl\" class=\"out.Circle\" scope=\"session\" \/>\n     <%girl.setRadius(300);%>\n <P>\u5706\u7684\u534a\u5f84\u662f\uff1a <%=girl.getRadius()%>\n<A href=\"\/myfile\/next.jsp\"><BR>next.jsp <\/A>\n<\/BODY><\/HTML><\/pre>\n
 
\nnext.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=GB2312\" %>\n<%@ page import=\"out.Circle\"%>\n<HTML><BODY bgcolor=white><Font size=3>\n <jsp:useBean id=\"girl\" class=\"out.Circle\" scope=\"session\" \/>\n<P>\u5706\u7684\u534a\u5f84\u662f\uff1a <%=girl.getRadius()%>\n  <%girl.setRadius(400);%>\n<P>\u4fee\u6539\u540e\u7684\u5706\u7684\u534a\u5f84\u662f\uff1a<%=girl.getRadius()%>\n<A href=\"..\/example4_2.jsp\"><BR>example4_2.jsp <\/A>\n<\/BODY><\/HTML>\n<\/pre>\n
 
\nexample4_3.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=GB2312\" %>\n<%@ page import=\"out.*\"%>\n<HTML> <BODY>\n <jsp:useBean id=\"girl\" class=\"out.Circle\" scope=\"application\" >\n <\/jsp:useBean>\n<P>\u5706\u7684\u521d\u59cb\u534a\u5f84\u662f\uff1a<%=girl.getRadius()%>\n  <%girl.setRadius(1000);%>\n<P>\u4fee\u6539\u540e\u7684\u5706\u7684\u534a\u5f84\u662f\uff1a<%=girl.getRadius()%>\n<\/BODY><\/HTML><\/pre>\n
 
\n 
\npage\u793a\u4f8b\uff1a
\n\"\"
\nrequest\u793a\u4f8b\uff1a
\n\"\"
\n\u53ef\u4ee5\u770b\u5230\u53ea\u8981\u4e0d\u5237\u65b0\u9875\u9762\uff0c\u8be5bean\u90fd\u751f\u6548\uff08\u8fd9\u91cc\u53ef\u4ee5\u53bb\u770b\u4ee3\u7801\u4ed4\u7ec6\u601d\u8003\u4e0b\uff09
\n\u4f5c\u4e3a\u5bf9\u6bd4\uff0c\u6211\u4eec\u770b\u5982\u679c\u662fpage\uff0c\u8df3\u8f6c\u4e4b\u540e\u662f\u4ec0\u4e48\u6837\u5b50\u3002
\n 
\n\"\"
\n 
\nsession\u4e0d\u505a\u6f14\u793a\u3002
\n 
\n\u6700\u540e\u662fapplication\uff0c\u6211\u4eec\u4f7f\u75282\u4e2a\u6d4f\u89c8\u5668\uff0c\u8bbf\u95ee\u53d1\u73b0\u5176\u4e2d\u4e00\u4e2a\u9875\u9762\u505a\u51fa\u7684\u66f4\u6539\u5bf9\u53e6\u4e00\u4e2a\u7528\u6237\u7684\u8bbf\u95ee\u4ea7\u751f\u4e86\u5f71\u54cd\u3002
\n 
\n\"\"
\n\u6700\u540e\u7b80\u5355\u8bf4\u4e0bbean\u7684\u5de5\u4f5c\u539f\u7406\uff1a\u7528\u6237\u8bbf\u95ee\u9875\u9762\u65f6\uff0cJSP\u5f15\u64ce\u4f1a\u67e5\u627epageContent\u5bf9\u8c61\u4e2d\u662f\u5426\u542b\u6709\u8fd9\u79cd\u7684bean\uff0c\u5982\u679c\u6709\uff0c\u5219\u76f4\u63a5\u4e3a\u7528\u6237\u5206\u914d\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u5219\u6839\u636eclass\u6307\u5b9a\u7684\u5b57\u8282\u7801\u521b\u5efa\u4e00\u4e2aJSP\u52a8\u4f5c\u6807\u8bb0useBean\u8981\u6c42\u7684bean\uff0c\u5e76\u5c06\u6240\u521b\u5efa\u7684bean\u6dfb\u52a0\u5230pageContent\u5185\u7f6e\u5bf9\u8c61\u4e2d\uff0c\u52a0\u901f\u4e0b\u6b21\u4f7f\u7528\u3002
\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a\u5982\u679c\u4fee\u6539\u4e86\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u9700\u8981\u91cd\u542f\u670d\u52a1\u5668\u624d\u80fd\u4f7f\u7528\u65b0\u7684\u5b57\u8282\u7801\u6587\u4ef6\u3002\uff08\u56e0\u4e3a\u6dfb\u52a0\u5230pageContent\u5185\u7f6e\u5bf9\u8c61\u4e2d\u4e86\uff0c\u4e0d\u518d\u8bfb\u53d6\u5b57\u8282\u7801\u6587\u4ef6\uff09<\/strong><\/p>\n
<\/h3>\n
2.\u83b7\u53d6\u548c\u4fee\u6539bean\u7684\u5c5e\u6027<\/h3>\n
1.getProperty\u52a8\u4f5c\u6807\u8bb0<\/h4>\n
\u4f7f\u7528getProperty\u52a8\u4f5c\u6807\u8bb0\u53ef\u4ee5\u83b7\u5f97bean\u7684\u5c5e\u6027\u503c\uff0c\u5e76\u5c06\u8fd9\u4e2a\u503c\u7528\u4e32\u7684\u5f62\u5f0f\u53d1\u9001\u7ed9\u7528\u6237\u7684\u6d4f\u89c8\u5668\u3002
\n\u683c\u5f0f\uff1a<\/p>\n
<jsp:getProperty name=\"bean\u7684id\u7684\u540d\u5b57\"  property= \"bean\u7684\u5c5e\u6027\"\/><\/pre>\n
\u6216\u8005<\/p>\n
<jsp:getProperty name=\"bean\u7684id\u7684\u540d\u5b57\" property= \"bean\u7684\u5c5e\u6027\">\n<\/jsp:getProperty><\/pre>\n
\u8be5\u6307\u4ee4\u76f8\u5f53\u4e8ejava\u8868\u8fbe\u5f0f
\n<%=\u00a0 bean.getXxx() %><\/p>\n
<\/h4>\n
2.setProperty\u52a8\u4f5c\u6807\u8bb0<\/h4>\n
\u4f7f\u7528setProperty\u52a8\u4f5c\u6807\u8bb0\u53ef\u4ee5\u8bbe\u7f6ebean\u7684\u5c5e\u6027\u503c\u3002
\nsetProperty\u52a8\u4f5c\u6807\u8bb0\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8bbe\u7f6ebean\u5c5e\u6027\u7684\u503c\u3002
\n\uff081\uff09\u5c06bean\u5c5e\u6027\u7684\u503c\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u6216\u8005\u5b57\u7b26\u4e32\u3002
\n\u683c\u5f0f\uff1a<\/p>\n
<jsp:setProperty name=\"bean\u7684id\u7684\u540d\u5b57\" property= \"bean\u7684\u5c5e\u6027\" value=\"<%= \u8868\u8fbe\u5f0f%>\/><\/pre>\n
\u6216\u8005<\/p>\n
<jsp:setProperty name=\"bean\u7684id\u7684\u540d\u5b57\" property= \"bean\u7684\u5c5e\u6027\" value=\u5b57\u7b26\u4e32>\n<\/jsp:setProperty><\/pre>\n
 
\n(2) \u901a\u8fc7HTTP\u8868\u5355\u7684\u53c2\u6570\u7684\u503c\u6765\u8bbe\u7f6ebean\u7684\u76f8\u5e94\u5c5e\u6027\u7684\u503c\u3002
\n\u901a\u8fc7\u5f53\u524dJSP\u9875\u9762\u6216\u8bf7\u6c42\u672c\u9875\u9762\u7684\u5176\u4ed6\u9875\u9762\u4e2d\u7684HTTP\u8868\u5355\u7684\u53c2\u6570\u7684\u503c\u6765\u8bbe\u7f6ebean\u7684\u76f8\u5e94\u5c5e\u6027\u7684\u503c\u3002
\n\u7528HTTP\u8868\u5355\u7684\u6240\u6709\u53c2\u6570\u7684\u503c\u8bbe\u7f6ebean\u76f8\u5bf9\u5e94\u7684\u5c5e\u6027\u503c\u7684\u4f7f\u7528\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
<jsp:setProperty name=\"bean\u7684id\u7684\u540d\u5b57\" property= \"*\"\/><\/pre>\n
\u5728setProperty\u6807\u8bb0\u7684\u4e0a\u8ff0\u7528\u6cd5\u4e0d\u5177\u4f53\u6307\u5b9abean\u5c5e\u6027\u7684\u503c\u5c06\u5bf9\u5e94\u8868\u5355\u4e2d\u54ea\u4e2a\u53c2\u6570\u6307\u5b9a\u7684\u503c\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u6839\u636e\u540d\u5b57\u8fdb\u884c\u5339\u914d\u5bf9\u5e94\uff0c\u4f46\u8981\u6c42bean\u5c5e\u6027\u7684\u540d\u5b57\u5fc5\u987b\u5728\u8868\u5355\u4e2d\u6709\u540d\u79f0\u76f8\u540c\u7684\u53c2\u6570\u540d\u5b57\u76f8\u5bf9\u5e94\uff0cJSP\u5f15\u64ce\u4f1a\u81ea\u52a8\u5c06\u53c2\u6570\u7684\u5b57\u7b26\u4e32\u503c\u8f6c\u6362\u4e3abean\u76f8\u5bf9\u5e94\u7684\u5c5e\u6027\u7684\u503c\u3002
\n\u5982\u679c\u540d\u79f0\u4e0d\u4e00\u81f4\uff0c\u9700\u8981\u4f7f\u7528\u4ee5\u4e0b\u7684\u65b9\u6cd5\uff1a<\/p>\n
<jsp:setProperty name=\"bean\u7684\u540d\u5b57\" property=\"\u5c5e\u6027\u540d\" param=\"\u53c2\u6570\u540d\"\/><\/pre>\n
(\u8868\u5355\u4e2d\u7684\u540d\u5b57\u4e3a\u53c2\u6570\u540d\uff0cbean\u4e2d\u7684\u540d\u5b57\u4e3a\u5c5e\u6027\u540d\uff09
\n 
\n\u4e0b\u9762\u6817\u5b50\u6f14\u793a\u4e86set\u548cget\u7684\u7528\u6cd5\uff0c\u9700\u8981\u6ce8\u610f\uff0cStudent\u7684\u5b57\u8282\u7801\u6587\u4ef6\u5e94\u653e\u5728classes\u4e0b\u5bf9\u5e94\u7684\u76ee\u5f55\u4e0b\u624d\u884c\u3002
\nexample4_4.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=GB2312\" %>\n<%@ page import=\"out.Student\"%>\n<HTML><BODY bgcolor=white><Font size=3>\n     <jsp:useBean id=\"zhang\" class=\"out.Student\" scope=\"page\"\/>\n     <jsp:setProperty name=\"zhang\" property=\"name\" value=\"\u5f20\u4e09\"\/>\n\u540d\u5b57\u662f\uff1a<jsp:getProperty name=\"zhang\" property=\"name\"\/>\n     <jsp:setProperty name=\"zhang\" property=\"number\" value=\"2008001\"\/>\n<BR>\u5b66\u53f7\u662f\uff1a<jsp:getProperty name=\"zhang\" property=\"number\"\/>\n     <jsp:setProperty name=\"zhang\" property=\"height\" value=\"<%=1.78%>\"\/>\n<BR>\u8eab\u9ad8\u662f\uff1a<jsp:getProperty name=\"zhang\" property=\"height\"\/> \u7c73\n     <jsp:setProperty name=\"zhang\" property=\"weight\" value=\"67.65\"\/>\n<BR>\u4f53\u91cd\u662f\uff1a<jsp:getProperty name=\"zhang\" property=\"weight\"\/> \u516c\u65a4\n<\/FONT><\/BODY><\/HTML><\/pre>\n
 
\nStudent.java<\/p>\n
package out;\npublic class Goods\n{ String name,goodsNumber;\n  double price;\n  public String getName()\n  {  return name;\n  }\n  public void setName(String newName)\n  {  name=newName;\n  }\n  public String getGoodsNumber()\n  {  return goodsNumber;\n  }\n  public void setGoodsNumber(String s)\n  {  goodsNumber=s;\n  }\n  public double getPrice()\n  {  return price;\n  }\n  public void setPrice(double newPrice)\n  {  price=newPrice;\n  }\n}\n<\/pre>\n
 
\n\u6f14\u793a\u7ed3\u679c\u3002
\n\"\"
\n 
\n\u4e0b\u9762\u662f\u4e00\u4e2a\u57fa\u4e8ebean\u7684\u8ba1\u6570\u5668
\nexample4_10.jsp<\/p>\n
<%@ page contentType=\"text\/html;Charset=GB2312\" %>\n<%@ page import=\"out.*\" %>\n<jsp:useBean id=\"count\" class=\"out.ComputerCount\" scope=\"session\"\/>\n<HTML><BODY bgcolor=white><Font size=3>\n<P>Welcome\u6b22\u8fce\u60a8\u8bbf\u95ee\u672c\u7ad9,\u8fd9\u662f\u672c\u7f51\u7ad9\u7684comeOne.jsp\u9875\u9762\n   <BR>\u60a8\u662f\u7b2c\n       <jsp:getProperty name=\"count\" property=\"number\"\/>\n      \u4e2a\u8bbf\u95ee\u672c\u7f51\u7ad9\u7684\u5ba2\u6237\u3002\n   <A href=\"example4_10_b.jsp\">\u6b22\u8fce\u53bbcomeTwo.jsp\u53c2\u89c2<\/A>\n<\/BODY><\/HTML><\/pre>\n
 
\nexample4_10_b.jsp<\/p>\n
<%@ page contentType=\"text\/html;Charset=GB2312\" %>\n<%@ page import=\"out.*\" %>\n<jsp:useBean id=\"count\" class=\"out.ComputerCount\" scope=\"session\"\/>\n<HTML><BODY bgcolor=white><Font size=3>\n<P>Welcome\u6b22\u8fce\u60a8\u8bbf\u95ee\u672c\u7ad9,\u8fd9\u662f\u672c\u7f51\u7ad9\u7684example4_10_b.jsp\u9875\u9762\n   <BR>\u60a8\u662f\u7b2c\n       <jsp:getProperty name=\"count\" property=\"number\"\/>\n      \u4e2a\u8bbf\u95ee\u672c\u7f51\u7ad9\u7684\u5ba2\u6237\u3002\n   <A href=\"example4_10.jsp\">\u6b22\u8fce\u53bbexample4_10.jsp\u53c2\u89c2<\/A>\n   <A href=\"example4_10.jsp\">\u6b22\u8fce\u53bbexample4_10.jsp\u53c2\u89c2<\/A>\n<\/BODY><\/HTML><\/pre>\n
 
\nCoumpterCount.java<\/p>\n
package out;\nimport java.io.*;\npublic class ComputerCount\n{   int number=0;\n    boolean isCome=false;\n    File file=new File(\"count.dat\") ;\n    private void countPeople()\n    {  if(!file.exists())\n       {  number++;\n          try {  file.createNewFile();\n                 FileOutputStream out=new FileOutputStream(file);\n                 DataOutputStream dataOut=new DataOutputStream(out);\n                 dataOut.writeInt(number);\n                 out.close();\n                 dataOut.close();\n               }\n          catch(IOException ee){}\n        }\n       else\n        { try{ FileInputStream in=new FileInputStream(file);\n               DataInputStream dataIn=new DataInputStream(in);\n               number=dataIn.readInt();\n               number++;\n               in.close();\n               dataIn.close();\n               FileOutputStream out=new FileOutputStream(file);\n               DataOutputStream dataOut=new DataOutputStream(out);\n               dataOut.writeInt(number);\n               out.close();\n               dataOut.close();\n             }\n          catch(IOException ee){}\n        }\n      isCome=true;\n    }\n  public int getNumber()\n    {  if(isCome==false)\n         countPeople();\n       return number;\n    }\n}\n<\/pre>\n
 
\n\u56e0\u4e3a\u4e0a\u8ff0\u7a0b\u5e8f\u7528\u7684\u662fscope\u5c5e\u6027\u662fsession\uff0c\u6240\u4ee5\u5bf9\u4e8e\u540c\u4e00\u4e2asession\u5468\u671f\u53ea\u8ba1\u65f6\u4e00\u6b21\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u89e3\u538b\u76ee\u5f55\u4e2d\u7684bin\u4e0b\u627e\u5230\u6211\u4eec\u7528\u4e8e\u8ba1\u6b21\u7684count.dat\u6587\u4ef6\u3002
\n\"\"
\n\u540c\u65f6\u6211\u4eec\u4e5f\u5e94\u8be5\u6ce8\u610f\u5230\uff0c\u8fd9\u4e2ajava\u7a0b\u5e8f\u5e76\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u6587\u4ef6\u8f93\u5165\u6d41\u8f93\u51fa\u6d41\u5e76\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\uff0c\u8fd9\u6837\u5199\u4f1a\u5bfc\u81f4\u56e0\u4e3a\u56e0\u4e3a\u591a\u7ebf\u7a0b\u64cd\u4f5c\u5bfc\u81f4\u4e00\u4e9b\u610f\u6599\u4e4b\u5916\u7684\u95ee\u9898\u3002\u89e3\u51b3\u65b9\u6cd5\u5c31\u662f\u52a0\u4e0a\u7ebf\u7a0b\u9501\u3002
\n<\/p>\n
\u8bfe\u540e\u9898\uff1a<\/strong><\/h3>\n
1.\u5047\u8bbeWeb\u670d\u52a1\u76ee\u5f55mymoon\u4e2d\u7684JSP\u9875\u9762\u8981\u4f7f\u7528\u4e00\u4e2abean\uff0c\u8be5bean\u7684\u5305\u540d\u4e3ablue.sky\u3002\u8bf7\u8bf4\u660e\uff0c\u5e94\u5f53\u600e\u6837\u4fdd\u5b58bean\u7684\u5b57\u8282\u7801\u3002
\n\u00b7\u00a0\u00a0\u00a0 \u5728mymoon\u4e0b\u7684WEB-INF\u4e0b\u521b\u5efaclasses\/blue\/sky\uff0c\u5c06bean\u7684.java\u6587\u4ef6\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u5b58\u653e\u5230\u524d\u9762\u8bf4\u7684\u76ee\u5f55\u4e0b\u3002
\n2.tom.jiafei.Circle\u662f\u521b\u5efabean\u7684\u7c7b\uff0c\u4e0b\u5217\u54ea\u4e2a\u6807\u8bb0\u662f\u6b63\u786e\u521b\u5efasession\u5468\u671fbean\u7684\u6807\u8bb0\uff1f ( C )
\nA.<jsp:useBean id=”circle” class=”tom.jiafei.Circle” scope=”page”\/>
\nB.<jsp:useBean id=”circle” class=”tom.jiafei.Circle” scope=”request”\/>
\nC.<jsp:useBean id=”circle” class=”tom.jiafei.Circle” scope=”session”\/>
\nD.<jsp:useBean id=”circle” type=”tom.jiafei.Circle” scope=”session”\/>
\n3.\u5047\u8bbe\u521b\u5efabean\u7684\u7c7b\u53c8\u4e00\u4e2aint\u578b\u7684\u5c5e\u6027number\uff0c\u4e0b\u5217\u90a3\u4e2a\u65b9\u6cd5\u662f\u8bbe\u7f6e\u8be5\u5c5e\u6027\u503c\u7684\u6b63\u786e\u65b9\u6cd5\uff1f ( A )
\nA.<\/p>\n
 public void setNumber(int n)\n{\n    number=n;\n}<\/pre>\n
B.<\/p>\n
void setNumber(int n)\n{\n    number=n;\n}<\/pre>\n
C.<\/p>\n
 public void SetNumber(int n)\n{\n    number=n;\n}<\/pre>\n
D.<\/p>\n
 public void Setnumber(int n)\n{\n    number=n;\n}<\/pre>\n
 
\n4.\u5047\u8bbeJSP\u9875\u9762\u4f7f\u7528\u6807\u8bb0<\/p>\n
<jsp:useBean id=\"moon\" class=\"tom.jiafei.AAA\" scope=\"page\"\/><\/pre>\n
\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u5b57\u4e3amoon\u7684bean\uff0c\u8be5bean\u53c8\u4e00\u4e2aString\u7c7b\u578b\uff0c\u540d\u5b57\u4e3anumber\u7684\u5c5e\u6027\u3002\u5982\u679c\u521b\u5efamoon\u7684Java\u7c7bAAA\u6ca1\u6709\u63d0\u4f9bpublic String getNumber\uff08\uff09\u65b9\u6cd5\uff0cJSP\u9875\u9762\u662f\u5426\u5141\u8bb8\u4f7f\u7528\u5982\u4e0bgetProperty\u6807\u8bb0\u83b7\u53d6moon\u7684number\u5c5e\u6027\u7684\u503c\uff1f<\/p>\n
<jsp:getProperty name=\"moon\" property=\"number\"\/><\/pre>\n
\u00b7\u00a0\u00a0\u00a0 \u4e0d\u5141\u8bb8
\n5.\u7f16\u5199\u4e00\u4e2aJSP\u9875\u9762\uff0c\u8be5\u9875\u9762\u63d0\u4f9b\u4e00\u4e2a\u8868\u5355\uff0c\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u8868\u5355\u8f93\u5165\u68af\u5f62\u7684\u4e0a\u5e95\u3001\u4e0b\u5e95\u548c\u9ad8\u7684\u503c\uff0c\u5e76\u63d0\u4ea4\u7ed9\u672cJSP\u9875\u9762\uff0c\u8be5JSP\u9875\u9762\u5c06\u8ba1\u7b97\u673a\u68af\u5f62\u7684\u9762\u79ef\u503c\u4efb\u52a1\u4ea4\u7ed9\u4e00\u4e2abean\u53bb\u5b8c\u6210\u3002JSP\u9875\u9762\u4f7f\u7528getProerty\u52a8\u4f5c\u6807\u8bb0\u663e\u793a\u68af\u5f62\u7684\u9762\u79ef\u3002
\nexample5.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=gb2312\"%>\n<%@ page import=\"out.*\"%>\n<jsp:useBean id=\"compute\" class=\"out.Computer\" scope=\"page\"\/>\n<form action=\"\" method=\"post\">\n  \u4e0a\u5e95<input type=\"text\" name=\"upper\">\n  \u4e0b\u5e95<input type=\"text\" name=\"lowwer\">\n  \u9ad8<input type=\"text\" name=\"height\">\n  <input type=\"submit\" value=\"\u63d0\u4ea4\">\n<\/form>\n<jsp:setProperty name=\"compute\" property=\"*\"\/>\n\u68af\u5f62\u7684\u9762\u79ef\u662f\uff1a<%=compute.getArea()%><\/pre>\n
 
\ncomputer.java<\/p>\n
package out;\npublic class Computer {\n    int upper;\n    int lowwer;\n    int height;\n    public double getArea(){\n      return (upper+lowwer)*height\/2;\n    }\n    public int getUpper(){\n      return upper;\n    }\n    public void setUpper(int n){\n      upper = n;\n    }\n    public int getLowwer(){\n      return lowwer;\n    }\n    public void setLowwer(int n){\n      lowwer = n;\n    }\n    public int getHeight(){\n      return height;\n    }\n    public void setheight(int n){\n      height=n;\n    }\n}\n<\/pre>\n
 
\n\u8fd0\u884c\u6548\u679c\uff1a
\n\"\"
\n6.\u7f16\u5199\u4e24\u4e2aJSP\u9875\u9762a.jsp\u548cb.jsp\uff0ca.jsp\u9875\u9762\u63d0\u4f9b\u4e00\u4e2a\u8868\u5355\uff0c\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u8868\u5355\u8f93\u5165\u77e9\u5f62\u7684\u4e24\u4e2a\u8fb9\u957f\u63d0\u4ea4\u7ed9b.jsp\u9875\u9762\uff0cb.jsp\u8c03\u7528\u4e00\u4e2abean\u53bb\u5b8c\u6210\u8ba1\u7b97\u77e9\u5f62\u9762\u79ef\u7684\u4efb\u52a1\u3002b.jsp\u9875\u9762\u4f7f\u7528getProperty\u52a8\u4f5c\u6807\u8bb0\u663e\u793a\u77e9\u5f62\u7684\u9762\u79ef\u3002
\na.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=gb2312\"%>\n<form action=\"b.jsp\" method=\"post\">\n  \u957f<input type=\"text\" name=\"length\">\n  \u5bbd<input type=\"text\" name=\"wide\">\n  <input type=\"submit\" value=\"\u63d0\u4ea4\">\n<\/form><\/pre>\n
 
\nb.jsp<\/p>\n
<%@ page contentType=\"text\/html;charset=gb2312\"%>\n<%@ page import=\"out.*\"%>\n<jsp:useBean id=\"compute\" class=\"out.ComputeArea\" scope=\"page\"\/>\n<%\n  String length = request.getParameter(\"length\");\n  String wide = request.getParameter(\"wide\");\n%>\n<jsp:setProperty name=\"compute\" property=\"*\"\/>\n<%=compute.getArea()%>\n<\/pre>\n
 
\nComputeArea.java<\/p>\n
package out;\npublic class ComputeArea{\n  private double length;\n  private double wide;\n  public double getLength() {\n    return length;\n  }\n  public void setLength(double length) {\n    this.length = length;\n  }\n  public double getWide() {\n    return wide;\n  }\n  public void setWide(double wide) {\n    this.wide =wide;\n  }\n  public double getArea(){\n    return length*wide;\n  }\n}\n<\/pre>\n
 
\n <\/p>\n","protected":false},"excerpt":{"rendered":"
JSP\u4e0eJavabean \u6309\u7167Sun\u516c\u53f8\u7684\u5b9a\u4e49\uff0cJavabean\u662f\u4e00\u4e2a\u53ef\u91cd\u590d\u4f7f\u7528\u7684\u8f6f\u4ef6\u7ec4\u4ef6\uff0c\u5b9e\u9645\u4e0aJ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[22],"tags":[],"views":7087,"_links":{"self":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/354"}],"collection":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/comments?post=354"}],"version-history":[{"count":0,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/354\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/media?parent=354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/categories?post=354"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/tags?post=354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}