第一节初识MVC实现计算器
2024-07-21 04:38:57 227人阅读
第一节初识MVC实现计算器<style type="text/css">/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab filetype=css: *//*! * Base CSS for pdf2htmlEX * Copyright 2012,2013 Lu Wang * https://github.com/coolwanglu/pdf2htmlEX/blob/master/share/LICENSE *//* Part 1: Web Page Layout: Free to modify, except for a few of them which are required by pdf2htmlEX.js, see the comments */#sidebar { /* Sidebar */ position:absolute; top:0; left:0; bottom:0; width:250px; padding:0; margin:0px; overflow:auto;}#page-container { /* PDF container */ position:absolute; /* required for calulating relative positions of pages in pdf2htmlEX.js */ top:0; left:0px; margin:0; padding:0; border:0; /* required for lazy page loading in pdf2htmlEX.js (page visibility test) */}@media screen { /* for sidebar */ #sidebar.opened + #page-container { left:250px; } #page-container { /* `bottom‘ and `right‘ are required for lazy page loading in pdf2htmlEX.js (page visibility test) * alternatively you may set width and height */ bottom:0; right:0; overflow:auto; } .loading-indicator { display:none; } .loading-indicator.active { display:block; position:absolute; width:64px; height:64px; top:50%; left:50%; margin-top:-32px; margin-left:-32px; } .loading-indicator img { position:absolute; top:0; left:0; bottom:0; right:0; }}@media print { @page { margin:0; } html { margin:0; } body { margin:0; -webkit-print-color-adjust:exact; /* enable printing background images for WebKit */ } #sidebar { display:none; } #page-container { width:auto; height:auto; overflow:visible; background-color:transparent; } .d { display:none; }}/* Part 2: Page Elements: Modify with caution * The followings are base classes, some of which are meant to be override by PDF specific classes * So do not increase the specificity (e.g. ".classname" -> "#page-container .classname") */.pf { /* page */ position:relative; background-color:white; overflow: hidden; margin:0; border:0; /* required by pdf2htmlEX.js for page visibility test */}.pc { /* content of a page */ position:absolute; border:0; padding:0; margin:0; top:0; left:0; width:100%; height:100%; overflow:hidden; display:block; /* set transform-origin for scaling */ transform-origin:0% 0%; -ms-transform-origin:0% 0%; -webkit-transform-origin:0% 0%;}.pc.opened { /* used by pdf2htmlEX.js, to show/hide pages */ display:block;}.bf { /* images that occupies the whole page */ position:absolute; border:0; margin:0; top:0; bottom:0; width:100%; height:100%; -ms-user-select:none; -moz-user-select:none; -webkit-user-select:none; user-select:none;}.bi { /* images that cover only a part of the page */ position:absolute; border:0; margin:0; -ms-user-select:none; -moz-user-select:none; -webkit-user-select:none; user-select:none;}@media print { .pf { margin:0; box-shadow:none; page-break-after:always; page-break-inside:avoid; } @-moz-document url-prefix() { /* fix page truncation for FireFox */ .pf { overflow:visible; border:1px solid #FFFFFF; } .pc {overflow:visible;} }}.c { /* clip box */ position:absolute; border:0; padding:0; margin:0; overflow:hidden; display:block;}.t { /* text line */ position:absolute; white-space:pre; font-size:1px; transform-origin:0% 100%; -ms-transform-origin:0% 100%; -webkit-transform-origin:0% 100%; unicode-bidi:bidi-override;/* For rtl lanauges, e.g. Hebrew, we don‘t want the default Unicode behaviour */ -moz-font-feature-settings:"liga" 0;/* We don‘t want Firefox to recognize ligatures */}span { /* text blocks within a line */ position:relative; vertical-align: baseline; /* _ for spaces may need display:inline, which will override this */ display:inline-block; unicode-bidi:bidi-override; /* For rtl lanauges, e.g. Hebrew, we don‘t want the default Unicode behaviour */}._ { /* text shift */ color:transparent; z-index:-1;}/* selection background should not be opaque, for fallback mode */::selection{ background: rgba(127,255,255,0.4);}::-moz-selection{ background: rgba(127,255,255,0.4);}.pi { /* info for Javascript */ display:none;}.l { /* annotation links */}/* transparent color - WebKit */.d { /* css drawing */ position:absolute; transform-origin:0% 100%; -ms-transform-origin:0% 100%; -webkit-transform-origin:0% 100%;}/* Base CSS END */</style><style type="text/css">/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab filetype=css: *//*! * Fancy styles for pdf2htmlEX * Copyright 2012,2013 Lu Wang * https://github.com/coolwanglu/pdf2htmlEX/blob/master/share/LICENSE */@keyframes fadein { from { opacity:0;} to { opacity:1;} }@-webkit-keyframes fadein { from { opacity:0;} to { opacity:1;} }@keyframes swing { 0% { transform: rotate(0deg); } 10% { transform: rotate(0deg); } 90% { transform: rotate(720deg); } 100%{ transform: rotate(720deg); }}@-webkit-keyframes swing { 0% { -webkit-transform: rotate(0deg); } 10% { -webkit-transform: rotate(0deg); } 90% { -webkit-transform: rotate(720deg); } 100%{ -webkit-transform: rotate(720deg); }}@media screen { #sidebar { background-color:#2f3236; /* modified from http://philbit.com/svgpatterns/#crossstripes */ background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0IiBoZWlnaHQ9IjQiPgo8cmVjdCB3aWR0aD0iNCIgaGVpZ2h0PSI0IiBmaWxsPSIjNDAzYzNmIj48L3JlY3Q+CjxwYXRoIGQ9Ik0wIDBMNCA0Wk00IDBMMCA0WiIgc3Ryb2tlLXdpZHRoPSIxIiBzdHJva2U9IiMxZTI5MmQiPjwvcGF0aD4KPC9zdmc+"); } #outline { font-family:Georgia,Times,"Times New Roman",serif; font-size:13px; margin:2em 1em; } #outline ul { padding:0; } #outline li { list-style-type:none; margin:1em 0; } #outline li > ul { margin-left: 1em; } #outline a, #outline a:visited, #outline a:hover, #outline a:active { line-height:1.2; color:#e8e8e8; text-overflow:ellipsis; white-space:nowrap; text-decoration:none; display:block; overflow:hidden; outline:0; } #outline a:hover { color:rgb(0,204,255); } #page-container { background-color:#9e9e9e; /* http://philbit.com/svgpatterns/#thinstripes */ background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1IiBoZWlnaHQ9IjUiPgo8cmVjdCB3aWR0aD0iNSIgaGVpZ2h0PSI1IiBmaWxsPSIjOWU5ZTllIj48L3JlY3Q+CjxwYXRoIGQ9Ik0wIDVMNSAwWk02IDRMNCA2Wk0tMSAxTDEgLTFaIiBzdHJva2U9IiM4ODgiIHN0cm9rZS13aWR0aD0iMSI+PC9wYXRoPgo8L3N2Zz4="); -webkit-transition:left 500ms; transition:left 500ms; } .pf { margin: 13px auto; box-shadow: 1px 1px 3px 1px #333; /* Needed by IE to make box-shadow works * https://developer.mozilla.org/en-US/docs/Web/CSS/box-shadow */ border-collapse: separate; } .pc.opened { /* used by pdf2htmlEX.js, to show/hide pages */ -webkit-animation: fadein 100ms; animation: fadein 100ms; } .loading-indicator.active { /* * use 0.01s instead of 0s, * since YUI Compressor will change 0s to 0, * which is not recognized by Firefox */ -webkit-animation: swing 1.5s ease-in-out 0.01s infinite alternate none; animation: swing 1.5s ease-in-out 0.01s infinite alternate none; }}/* Fancy CSS END */</style><style type="text/css">.ff0{font-family:sans-serif;visibility:hidden;}@font-face{font-family:ff1;src:url("e1af90a7-2ee6-426f-9630-f1e130569f39_files/f1.woff")format("woff");}.ff1{font-family:ff1;line-height:0.925781;font-style:normal;font-weight:normal;visibility:visible;}@font-face{font-family:ff2;src:url("e1af90a7-2ee6-426f-9630-f1e130569f39_files/f2.woff")format("woff");}.ff2{font-family:ff2;line-height:0.694336;font-style:normal;font-weight:normal;visibility:visible;}@font-face{font-family:ff3;src:url("e1af90a7-2ee6-426f-9630-f1e130569f39_files/f3.woff")format("woff");}.ff3{font-family:ff3;line-height:0.895996;font-style:normal;font-weight:normal;visibility:visible;}@font-face{font-family:ff4;src:url("e1af90a7-2ee6-426f-9630-f1e130569f39_files/f4.woff")format("woff");}.ff4{font-family:ff4;line-height:0.866699;font-style:normal;font-weight:normal;visibility:visible;}@font-face{font-family:ff5;src:url("e1af90a7-2ee6-426f-9630-f1e130569f39_files/f5.woff")format("woff");}.ff5{font-family:ff5;line-height:0.895996;font-style:normal;font-weight:normal;visibility:visible;}.m0{transform:matrix(0.300000,0.000000,0.000000,0.300000,0,0);-ms-transform:matrix(0.300000,0.000000,0.000000,0.300000,0,0);-webkit-transform:matrix(0.300000,0.000000,0.000000,0.300000,0,0);}.v0{vertical-align:0.000000px;}.ls3{letter-spacing:-3.200000px;}.ls0{letter-spacing:0.000000px;}.ls2{letter-spacing:11.400000px;}.ls1{letter-spacing:17.520000px;}.sc_{text-shadow:none;}.sc1{text-shadow:-0.015em 0 transparent,0 0.015em transparent,0.015em 0 transparent,0 -0.015em transparent;}.sc0{text-shadow:-0.015em 0 rgb(0,0,0),0 0.015em rgb(0,0,0),0.015em 0 rgb(0,0,0),0 -0.015em rgb(0,0,0);}@media screen and (-webkit-min-device-pixel-ratio:0){.sc_{-webkit-text-stroke:0px transparent;}.sc1{-webkit-text-stroke:0.015em transparent;text-shadow:none;}.sc0{-webkit-text-stroke:0.015em rgb(0,0,0);text-shadow:none;}}.ws0{word-spacing:0.000000px;}._6{display:inline;margin-left:-5.798400px;}._7{display:inline;margin-left:-4.380800px;}._3{display:inline;margin-left:-1.784000px;}._0{display:inline-block;width:1.800000px;}._5{display:inline-block;width:8.100000px;}._4{display:inline-block;width:11.217600px;}._2{display:inline-block;width:13.264000px;}._1{display:inline-block;width:17.752000px;}.fc3{color:rgb(63,95,191);}.fc2{color:rgb(63,127,127);}.fc1{color:rgb(0,128,128);}.fc0{color:rgb(0,0,0);}.fs2{font-size:32.000000px;}.fs3{font-size:36.800000px;}.fs1{font-size:41.600000px;}.fs0{font-size:64.000000px;}.fs4{font-size:80.000000px;}.y40{bottom:-10.560000px;}.y20{bottom:2.892000px;}.y2b{bottom:6.756000px;}.y22{bottom:8.136000px;}.y1d{bottom:9.636000px;}.y41{bottom:10.109880px;}.y3b{bottom:12.936000px;}.y39{bottom:14.892000px;}.y1f{bottom:21.612000px;}.y2a{bottom:24.996000px;}.y34{bottom:27.336000px;}.y1c{bottom:28.356000px;}.y29{bottom:43.716000px;}.y33{bottom:45.600000px;}.y37{bottom:46.056000px;}.y0{bottom:47.400000px;}.y28{bottom:61.956000px;}.y3f{bottom:63.876000px;}.y1b{bottom:65.796000px;}.y27{bottom:80.712000px;}.y32{bottom:83.532000px;}.y1a{bottom:84.552000px;}.y26{bottom:99.432000px;}.y36{bottom:102.240000px;}.y19{bottom:103.272000px;}.y25{bottom:118.140000px;}.y18{bottom:121.980000px;}.y35{bottom:125.364000px;}.y24{bottom:136.896000px;}.y31{bottom:139.716000px;}.y17{bottom:140.736000px;}.y30{bottom:157.956000px;}.y38{bottom:175.764000px;}.y2f{bottom:177.192000px;}.y3e{bottom:236.724000px;}.y3d{bottom:291.024000px;}.y16{bottom:360.624000px;}.y23{bottom:364.464000px;}.y21{bottom:380.844000px;}.y2d{bottom:389.004000px;}.y1e{bottom:449.484000px;}.y2c{bottom:460.056000px;}.y15{bottom:517.200000px;}.y3a{bottom:528.744000px;}.y14{bottom:535.920000px;}.y13{bottom:554.676000px;}.y3c{bottom:562.824000px;}.y12{bottom:573.396000px;}.y11{bottom:592.104000px;}.y10{bottom:610.824000px;}.yf{bottom:629.580000px;}.y2e{bottom:632.004000px;}.ye{bottom:648.300000px;}.yd{bottom:667.020000px;}.yc{bottom:685.764000px;}.yb{bottom:704.496000px;}.ya{bottom:723.204000px;}.y9{bottom:741.960000px;}.y8{bottom:760.680000px;}.y7{bottom:779.400000px;}.y6{bottom:798.156000px;}.y5{bottom:816.864000px;}.y4{bottom:835.596000px;}.y3{bottom:854.304000px;}.y2{bottom:873.060000px;}.y1{bottom:898.500000px;}.hb{height:21.703125px;}.h7{height:23.016000px;}.h11{height:23.040000px;}.h9{height:24.468000px;}.hc{height:26.375000px;}.h13{height:26.414062px;}.h3{height:29.859375px;}.h10{height:30.331250px;}.h5{height:34.287500px;}.h6{height:35.040000px;}.he{height:36.960000px;}.h14{height:39.810120px;}.h2{height:52.750000px;}.h15{height:54.648438px;}.hf{height:60.030000px;}.h12{height:77.340000px;}.hd{height:137.316000px;}.h8{height:151.296000px;}.h4{height:158.496000px;}.ha{height:189.180000px;}.h1{height:778.800000px;}.h0{height:1010.400000px;}.we{width:72.990000px;}.w6{width:74.910000px;}.w7{width:92.196000px;}.w4{width:107.076000px;}.w3{width:119.100000px;}.wa{width:133.500000px;}.w2{width:175.320000px;}.w5{width:196.956000px;}.wc{width:211.800000px;}.wd{width:231.030000px;}.w9{width:237.744000px;}.wb{width:253.080000px;}.w8{width:396.240000px;}.w1{width:700.800000px;}.w0{width:714.240000px;}.x0{left:9.600000px;}.xd{left:18.720000px;}.x9{left:26.400000px;}.x7{left:28.824000px;}.x6{left:33.624000px;}.x13{left:40.824000px;}.xb{left:98.460000px;}.x2{left:108.060000px;}.x11{left:118.620000px;}.x4{left:124.416000px;}.x5{left:150.816000px;}.x8{left:157.560000px;}.x1{left:195.000000px;}.x10{left:259.380000px;}.x3{left:309.804000px;}.xf{left:311.256000px;}.x12{left:314.136000px;}.x16{left:337.200000px;}.xa{left:369.840000px;}.xc{left:430.860000px;}.xe{left:434.700000px;}.x15{left:498.576000px;}.x14{left:561.516000px;}@media print{.v0{vertical-align:0.000000pt;}.ls3{letter-spacing:-3.555556pt;}.ls0{letter-spacing:0.000000pt;}.ls2{letter-spacing:12.666667pt;}.ls1{letter-spacing:19.466667pt;}.ws0{word-spacing:0.000000pt;}._6{display:inline;margin-left:-6.442667pt;}._7{display:inline;margin-left:-4.867556pt;}._3{display:inline;margin-left:-1.982222pt;}._0{display:inline-block;width:2.000000pt;}._5{display:inline-block;width:9.000000pt;}._4{display:inline-block;width:12.464000pt;}._2{display:inline-block;width:14.737778pt;}._1{display:inline-block;width:19.724444pt;}.fs2{font-size:35.555556pt;}.fs3{font-size:40.888889pt;}.fs1{font-size:46.222222pt;}.fs0{font-size:71.111111pt;}.fs4{font-size:88.888889pt;}.y40{bottom:-11.733333pt;}.y20{bottom:3.213333pt;}.y2b{bottom:7.506667pt;}.y22{bottom:9.040000pt;}.y1d{bottom:10.706667pt;}.y41{bottom:11.233200pt;}.y3b{bottom:14.373333pt;}.y39{bottom:16.546667pt;}.y1f{bottom:24.013333pt;}.y2a{bottom:27.773333pt;}.y34{bottom:30.373333pt;}.y1c{bottom:31.506667pt;}.y29{bottom:48.573333pt;}.y33{bottom:50.666667pt;}.y37{bottom:51.173333pt;}.y0{bottom:52.666667pt;}.y28{bottom:68.840000pt;}.y3f{bottom:70.973333pt;}.y1b{bottom:73.106667pt;}.y27{bottom:89.680000pt;}.y32{bottom:92.813333pt;}.y1a{bottom:93.946667pt;}.y26{bottom:110.480000pt;}.y36{bottom:113.600000pt;}.y19{bottom:114.746667pt;}.y25{bottom:131.266667pt;}.y18{bottom:135.533333pt;}.y35{bottom:139.293333pt;}.y24{bottom:152.106667pt;}.y31{bottom:155.240000pt;}.y17{bottom:156.373333pt;}.y30{bottom:175.506667pt;}.y38{bottom:195.293333pt;}.y2f{bottom:196.880000pt;}.y3e{bottom:263.026667pt;}.y3d{bottom:323.360000pt;}.y16{bottom:400.693333pt;}.y23{bottom:404.960000pt;}.y21{bottom:423.160000pt;}.y2d{bottom:432.226667pt;}.y1e{bottom:499.426667pt;}.y2c{bottom:511.173333pt;}.y15{bottom:574.666667pt;}.y3a{bottom:587.493333pt;}.y14{bottom:595.466667pt;}.y13{bottom:616.306667pt;}.y3c{bottom:625.360000pt;}.y12{bottom:637.106667pt;}.y11{bottom:657.893333pt;}.y10{bottom:678.693333pt;}.yf{bottom:699.533333pt;}.y2e{bottom:702.226667pt;}.ye{bottom:720.333333pt;}.yd{bottom:741.133333pt;}.yc{bottom:761.960000pt;}.yb{bottom:782.773333pt;}.ya{bottom:803.560000pt;}.y9{bottom:824.400000pt;}.y8{bottom:845.200000pt;}.y7{bottom:866.000000pt;}.y6{bottom:886.840000pt;}.y5{bottom:907.626667pt;}.y4{bottom:928.440000pt;}.y3{bottom:949.226667pt;}.y2{bottom:970.066667pt;}.y1{bottom:998.333333pt;}.hb{height:24.114583pt;}.h7{height:25.573333pt;}.h11{height:25.600000pt;}.h9{height:27.186667pt;}.hc{height:29.305556pt;}.h13{height:29.348958pt;}.h3{height:33.177083pt;}.h10{height:33.701389pt;}.h5{height:38.097222pt;}.h6{height:38.933333pt;}.he{height:41.066667pt;}.h14{height:44.233467pt;}.h2{height:58.611111pt;}.h15{height:60.720486pt;}.hf{height:66.700000pt;}.h12{height:85.933333pt;}.hd{height:152.573333pt;}.h8{height:168.106667pt;}.h4{height:176.106667pt;}.ha{height:210.200000pt;}.h1{height:865.333333pt;}.h0{height:1122.666667pt;}.we{width:81.100000pt;}.w6{width:83.233333pt;}.w7{width:102.440000pt;}.w4{width:118.973333pt;}.w3{width:132.333333pt;}.wa{width:148.333333pt;}.w2{width:194.800000pt;}.w5{width:218.840000pt;}.wc{width:235.333333pt;}.wd{width:256.700000pt;}.w9{width:264.160000pt;}.wb{width:281.200000pt;}.w8{width:440.266667pt;}.w1{width:778.666667pt;}.w0{width:793.600000pt;}.x0{left:10.666667pt;}.xd{left:20.800000pt;}.x9{left:29.333333pt;}.x7{left:32.026667pt;}.x6{left:37.360000pt;}.x13{left:45.360000pt;}.xb{left:109.400000pt;}.x2{left:120.066667pt;}.x11{left:131.800000pt;}.x4{left:138.240000pt;}.x5{left:167.573333pt;}.x8{left:175.066667pt;}.x1{left:216.666667pt;}.x10{left:288.200000pt;}.x3{left:344.226667pt;}.xf{left:345.840000pt;}.x12{left:349.040000pt;}.x16{left:374.666667pt;}.xa{left:410.933333pt;}.xc{left:478.733333pt;}.xe{left:483.000000pt;}.x15{left:553.973333pt;}.x14{left:623.906667pt;}}</style>
第一节 初识 MVC 实现计算器
Web.xml
<servlet>
<!-- 使用自定义的控制器 -->
<servlet-name>Controller</servlet-name>
<servlet-class>com.nuan.framework.Controller</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Controller</servlet-name>
<!-- 请求匹配类型 -->
<url-pattern>*.action</url-pattern>
</servlet-mapping>
初始化 actionMap
根据 path 选择 action
处理 get/post 请求，得到目标 jsp 页面跳转
获得页面输入
调用业务逻辑方法，获得返回值，将结果保存
在 request 中，以便在页面中得到
返回将要转发到的页面路径
来自为知笔记(Wiz)
第一节初识MVC实现计算器
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉：
投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。
