{"id":36825,"date":"2023-09-24T03:07:10","date_gmt":"2023-05-17T13:41:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%9b%b4%e5%88%b0%e8%bf%90%e8%a1%8capache-velocity%e7%9a%84%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a0%81\/"},"modified":"2024-05-04T01:15:58","modified_gmt":"2024-05-03T17:15:58","slug":"%e7%9b%b4%e5%88%b0%e8%bf%90%e8%a1%8capache-velocity%e7%9a%84%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%9b%b4%e5%88%b0%e8%bf%90%e8%a1%8capache-velocity%e7%9a%84%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a0%81\/","title":{"rendered":"\u76f4\u5230\u8fd0\u884cApache Velocity\u7684\u793a\u4f8b\u4ee3\u7801"},"content":{"rendered":"<h1>\u76f4\u5230\u8fd0\u884cApache Velocity\u7684\u793a\u4f8b\u4ee3\u7801<\/h1>\n<p>\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u73af\u5883\uff0c\u4f5c\u4e3a\u81ea\u5df1\u7684\u5907\u5fd8\u5f55\uff0c\u7528\u4e8e\u67e5\u770bVelocity\u7684\u884c\u4e3a\uff0c\u540c\u65f6\u9605\u8bfb\u5b98\u65b9\u7f51\u7ad9\u3002<br \/>\n\u203b\u6211\u53ea\u662f\u4e3a\u4e86\u786e\u4fddVelocity\u53ef\u4ee5\u8fd0\u884c\u800c\u8fdb\u884c\u73af\u5883\u8bbe\u7f6e\uff0c\u5982\u679c\u6709\u4efb\u4f55\u9519\u8bef\uff0c\u8bf7\u6307\u6b63\uff0c\u6211\u4f1a\u975e\u5e38\u611f\u6fc0\u3002<\/p>\n<h2>\u5fc5\u9700\u54c1<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Tomcat 9\uff08\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30b3\u30f3\u30c6\u30ca\uff09<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Eclipse\uff08\u7d71\u5408\u958b\u767a\u74b0\u5883\uff09<\/ul>\n<h2>\u6e90\u4ee3\u7801\u7684\u5168\u90e8\u6587\u4ef6<\/h2>\n<p>\u4ee5\u4e0b\u94fe\u63a5\u662f\u901a\u8fc7\u4e0b\u5217\u6b65\u9aa4\u521b\u5efa\u7684\u6e90\u4ee3\u7801\u7684Git\u4ed3\u5e93\uff1a<br \/>\nhttps:\/\/github.com\/vicboss1002\/velocity_sample<\/p>\n<h2>\u6d41\u7a0b<\/h2>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5b89\u88c5Tomcat<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5c06Tomcat\u914d\u7f6e\u4e3aEclipse\u7684\u670d\u52a1\u5668<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728Eclipse\u4e2d\u521b\u5efa\u4e00\u4e2aMaven\u9879\u76ee<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4f7f\u7528Maven\u4e0b\u8f7d\u4f9d\u8d56\u5e93<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728\u6d4f\u89c8\u5668\u4e2d\u663e\u793aVelocity\u6a21\u677f\u6587\u4ef6<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u4eceJava\u4f20\u9012\u53d8\u91cf\u5230Velocity\u4e0a\u4e0b\u6587\u5e76\u663e\u793a<\/ol>\n<h3>\u5b89\u88c5Tomcat<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/9-0.png\" alt=\"image.png\" \/><\/div>\n<h3>\u5c06Tomcat\u8bbe\u7f6e\u4e3aEclipse\u7684\u670d\u52a1\u5668\u3002<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/11-1.png\" alt=\"image.png\" \/><\/div>\n<h3>\u4f7f\u7528Eclipse\u521b\u5efaMaven\u9879\u76ee\u3002<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/13-3.png\" alt=\"image.png\" \/><\/div>\n<h3>\u4f7f\u7528Maven\u4e0b\u8f7d\u4f9d\u8d56\u5e93<\/h3>\n<ol>\u5728pom.xml\u6587\u4ef6\u4e2d\uff0c\u6307\u5b9a\u4ee5\u4e0b\u4f9d\u8d56\u5e93\u3002<\/ol>\n<pre class=\"post-pre\"><code>&lt;dependency&gt;\r\n    &lt;groupId&gt;javax.servlet&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;javax.servlet-api&lt;\/artifactId&gt;\r\n    &lt;version&gt;4.0.0&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n&lt;dependency&gt;\r\n    &lt;groupId&gt;org.apache.velocity.tools&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;velocity-tools-generic&lt;\/artifactId&gt;\r\n    &lt;version&gt;3.0&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n&lt;dependency&gt;\r\n    &lt;groupId&gt;org.apache.velocity.tools&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;velocity-tools-view&lt;\/artifactId&gt;\r\n    &lt;version&gt;3.0&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n&lt;dependency&gt;\r\n    &lt;groupId&gt;org.apache.velocity.tools&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;velocity-tools-view-jsp&lt;\/artifactId&gt;\r\n    &lt;version&gt;3.0&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n&lt;dependency&gt;\r\n    &lt;groupId&gt;com.republicate&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;webapp-slf4j-logger&lt;\/artifactId&gt;\r\n    &lt;version&gt;1.3&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/17-1.png\" alt=\"image.png\" \/><\/div>\n<h3>\u663e\u793aVelocity\u6a21\u677f\u6587\u4ef6\u5728\u6d4f\u89c8\u5668\u4e2d<\/h3>\n<ol>\u6839\u636e\u6b64\u63cf\u8ff0\uff0c\u6211\u4eec\u5c06\u5728web.xml\u4e2d\u6dfb\u52a0VelocityViewServlet\u7684\u914d\u7f6e\u3002<\/ol>\n<pre class=\"post-pre\"><code><span class=\"c\">&lt;!-- \u30ed\u30b0\u51fa\u529b\u306e\u8a2d\u5b9a --&gt;<\/span>\r\n<span class=\"nt\">&lt;context-param&gt;<\/span>\r\n    <span class=\"nt\">&lt;param-name&gt;<\/span>webapp-slf4j-logger.level<span class=\"nt\">&lt;\/param-name&gt;<\/span>\r\n    <span class=\"nt\">&lt;param-value&gt;<\/span>debug<span class=\"nt\">&lt;\/param-value&gt;<\/span>\r\n<span class=\"nt\">&lt;\/context-param&gt;<\/span>\r\n<span class=\"nt\">&lt;context-param&gt;<\/span>\r\n    <span class=\"nt\">&lt;param-name&gt;<\/span>webapp-slf4j-logger.format<span class=\"nt\">&lt;\/param-name&gt;<\/span>\r\n    <span class=\"nt\">&lt;param-value&gt;<\/span>%logger [%level] [%ip] %message<span class=\"nt\">&lt;\/param-value&gt;<\/span>\r\n<span class=\"nt\">&lt;\/context-param&gt;<\/span>\r\n<span class=\"nt\">&lt;servlet&gt;<\/span>\r\n    <span class=\"nt\">&lt;servlet-name&gt;<\/span>velocity<span class=\"nt\">&lt;\/servlet-name&gt;<\/span>\r\n    <span class=\"nt\">&lt;servlet-class&gt;<\/span>\r\n        org.apache.velocity.tools.view.VelocityViewServlet\r\n    <span class=\"nt\">&lt;\/servlet-class&gt;<\/span>\r\n\r\n    <span class=\"c\">&lt;!-- Unless you plan to put your tools.xml and velocity.properties under \r\n        different folders or give them different names, then these two init-params \r\n        are unnecessary. The VelocityViewServlet will automatically look for these \r\n        files in the following locations. --&gt;<\/span>\r\n    <span class=\"nt\">&lt;init-param&gt;<\/span> \r\n        <span class=\"nt\">&lt;param-name&gt;<\/span>org.apache.velocity.toolbox<span class=\"nt\">&lt;\/param-name&gt;<\/span> \r\n        <span class=\"nt\">&lt;param-value&gt;<\/span>\/WEB-INF\/tools.xml<span class=\"nt\">&lt;\/param-value&gt;<\/span> \r\n    <span class=\"nt\">&lt;\/init-param&gt;<\/span> \r\n    <span class=\"nt\">&lt;init-param&gt;<\/span> \r\n        <span class=\"nt\">&lt;param-name&gt;<\/span>org.apache.velocity.properties<span class=\"nt\">&lt;\/param-name&gt;<\/span> \r\n        <span class=\"nt\">&lt;param-value&gt;<\/span>\/WEB-INF\/velocity.properties<span class=\"nt\">&lt;\/param-value&gt;<\/span> \r\n    <span class=\"nt\">&lt;\/init-param&gt;<\/span>\r\n<span class=\"nt\">&lt;\/servlet&gt;<\/span>\r\n\r\n<span class=\"c\">&lt;!-- Map *.vm files to Velocity --&gt;<\/span>\r\n<span class=\"nt\">&lt;servlet-mapping&gt;<\/span>\r\n    <span class=\"nt\">&lt;servlet-name&gt;<\/span>velocity<span class=\"nt\">&lt;\/servlet-name&gt;<\/span>\r\n    <span class=\"nt\">&lt;url-pattern&gt;<\/span>*.vm<span class=\"nt\">&lt;\/url-pattern&gt;<\/span>\r\n<span class=\"nt\">&lt;\/servlet-mapping&gt;<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/21-0.png\" alt=\"image.png\" \/><\/div>\n<pre class=\"post-pre\"><code>#set($text = \"Velocity World!\")\r\nHello $text\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/23-1.png\" alt=\"image.png\" \/><\/div>\n<p>\u5728\u8fd9\u4e2a\u5730\u65b9\u7ed3\u675f\u4e86\u3002<br \/>\n\u786e\u8ba4\u4e86\u5728sample.vm\u4e2d\u7f16\u5199\u7684Velocity\u5904\u7406\u88ab\u6267\u884c\u5e76\u663e\u793a\u4e86\u5185\u5bb9\u3002<\/p>\n<h3>\u4f7f\u7528Java\u5c06\u53d8\u91cf\u4f20\u9012\u5230Velocity\u4e0a\u4e0b\u6587\u4e2d\u5e76\u8fdb\u884c\u663e\u793a\u3002<\/h3>\n<ol>\u521b\u5efaVelictyViewServlet\u7684\u5b50\u7c7b\u3002<\/ol>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MyVelocityViewServlet<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">VelocityViewServlet<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"kd\">final<\/span> <span class=\"kt\">long<\/span> <span class=\"n\">serialVersionUID<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1L<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">protected<\/span> <span class=\"nc\">Template<\/span> <span class=\"nf\">handleRequest<\/span><span class=\"o\">(<\/span><span class=\"nc\">HttpServletRequest<\/span> <span class=\"n\">request<\/span><span class=\"o\">,<\/span>\r\n            <span class=\"nc\">HttpServletResponse<\/span> <span class=\"n\">response<\/span><span class=\"o\">,<\/span>\r\n            <span class=\"nc\">Context<\/span> <span class=\"n\">ctx<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n\r\n        <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"boolTrue\"<\/span><span class=\"o\">,<\/span> <span class=\"kc\">true<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"boolFalse\"<\/span><span class=\"o\">,<\/span> <span class=\"kc\">false<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"number\"<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1234<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"string\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"abcd\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"list\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Arrays<\/span><span class=\"o\">.<\/span><span class=\"na\">asList<\/span><span class=\"o\">(<\/span><span class=\"s\">\"a\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"b\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"c\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"d\"<\/span><span class=\"o\">));<\/span>\r\n\r\n        <span class=\"nc\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">map<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">HashMap<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n        <span class=\"n\">map<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"key1\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"value1\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">map<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"key2\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"value2\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"s\">\"map\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">map<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">handleRequest<\/span><span class=\"o\">(<\/span><span class=\"n\">request<\/span><span class=\"o\">,<\/span> <span class=\"n\">response<\/span><span class=\"o\">,<\/span> <span class=\"n\">ctx<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ol>\u5c06web.xml\u4fee\u6539\u4e3a\u4ee5\u4e0b\u5f62\u5f0f\uff0c\u4f9bVelictyViewServlet\u7684\u5b50\u7c7b\u4f7f\u7528\u3002<\/ol>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;servlet&gt;<\/span>\r\n    <span class=\"nt\">&lt;servlet-name&gt;<\/span>velocity<span class=\"nt\">&lt;\/servlet-name&gt;<\/span>\r\n<span class=\"c\">&lt;!--        &lt;servlet-class&gt; --&gt;<\/span>\r\n<span class=\"c\">&lt;!--            org.apache.velocity.tools.view.VelocityViewServlet --&gt;<\/span>\r\n<span class=\"c\">&lt;!--        &lt;\/servlet-class&gt; --&gt;<\/span>\r\n    <span class=\"nt\">&lt;servlet-class&gt;<\/span>velocity_sample.MyVelocityViewServlet<span class=\"nt\">&lt;\/servlet-class&gt;<\/span>\r\n\r\n    <span class=\"c\">&lt;!-- Unless you plan to put your tools.xml and velocity.properties under \r\n        different folders or give them different names, then these two init-params \r\n        are unnecessary. The VelocityViewServlet will automatically look for these \r\n        files in the following locations. --&gt;<\/span>\r\n    <span class=\"nt\">&lt;init-param&gt;<\/span>\r\n        <span class=\"nt\">&lt;param-name&gt;<\/span>org.apache.velocity.toolbox<span class=\"nt\">&lt;\/param-name&gt;<\/span>\r\n        <span class=\"nt\">&lt;param-value&gt;<\/span>\/WEB-INF\/tools.xml<span class=\"nt\">&lt;\/param-value&gt;<\/span>\r\n    <span class=\"nt\">&lt;\/init-param&gt;<\/span>\r\n    <span class=\"nt\">&lt;init-param&gt;<\/span>\r\n        <span class=\"nt\">&lt;param-name&gt;<\/span>org.apache.velocity.properties<span class=\"nt\">&lt;\/param-name&gt;<\/span>\r\n        <span class=\"nt\">&lt;param-value&gt;<\/span>\/WEB-INF\/velocity.properties<span class=\"nt\">&lt;\/param-value&gt;<\/span>\r\n    <span class=\"nt\">&lt;\/init-param&gt;<\/span>\r\n<span class=\"nt\">&lt;\/servlet&gt;<\/span>\r\n<\/code><\/pre>\n<ol>\u521b\u5efa\u4e00\u4e2a\u8c03\u7528\u7531Java\u8bbe\u7f6e\u7684\u53d8\u91cf\u7684\u6a21\u677f\u6587\u4ef6\u3002<\/ol>\n<pre class=\"post-pre\"><code>\\${boolTrue}: ${boolTrue}&lt;br\/&gt;\r\n\\${boolFalse}: ${boolFalse}&lt;br\/&gt;\r\n\\${number}: ${number}&lt;br\/&gt;\r\n\\${string}: ${string}&lt;br\/&gt;\r\n\\${list}: ${list}&lt;br\/&gt;\r\n\\${map}: ${map}&lt;br\/&gt;\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d2b0737434c4406c49377\/32-0.png\" alt=\"image.png\" \/><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u76f4\u5230\u8fd0\u884cApache Velocity\u7684\u793a\u4f8b\u4ee3\u7801 \u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u73af\u5883\uff0c\u4f5c\u4e3a\u81ea\u5df1\u7684\u5907\u5fd8\u5f55\uff0c\u7528\u4e8e\u67e5\u770bVelocity [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36825","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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