Spring MVC與Velocity整合
Velocity簡介
Apache Velocity 是一個基於java的模板引擎（template engine）。它允許任何人僅僅簡單的使用模板語言（template language）來引用由java代碼定義的對象。
當Velocity應用於web開發時，界面設計人員可以和java程序開發人員同步開發一個遵循MVC架構的web站點，也就是說，頁面設計人 員可以只關注頁面的顯示效果，而由java程序開發人員關注業務邏輯編碼。Velocity將java代碼從web頁面中分離出來，這樣爲web站點的長期維護提供了便利，同時也爲我們在JSP和PHP之外又提供了一種可選的方案。
Velocity應用場景
- Web 應用：開發者在不使用 JSP 的情況下，可以用 Velocity 讓 HTML 具有動態內容的特性；
- 源代碼生成：Velocity 可以被用來生成 Java 代碼、SQL 或者 PostScrip；
- 自動 Email：很多軟件的用戶註冊、密碼提醒或者報表都是使用 Velocity 來自動生成的；
- 轉換 xml；
SpringMVC+Velocity整合
Velocity現在應用非常廣泛，以下將詳細講解SpringMVC項目與Velocity整合
1. pom.xml文件
引入相關依賴的jar包，主要包含 velocity-1.7.jar和velocity-tools-2.0.jar包
<!-- start velocity -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-tools</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>velocity-tools</groupId>
<artifactId>velocity-tools-generic</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>velocity-tools</groupId>
<artifactId>velocity-tools-view</artifactId>
<version>1.4</version>
</dependency>
<!-- end velocity -->
2. 視圖配置
<!-- 配置velocity引擎 -->
<bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
<property name="resourceLoaderPath"
value="/WEB-INF/templates/views/,/WEB-INF/templates/,/WEB-INF/templates/decorators"/>
<property name="configLocation"
value="/WEB-INF/classes/config/properties/velocity.properties"/>
</bean>
3. 配置velocity.properties文件
----------------------------------------------------------------------------
runtime.log.logsystem.class = org.apache.velocity.runtime.log.SimpleLog4JLogSystem
runtime.log.logsystem.log4j.category = sys.template
runtime.log = velocity_error_log
runtime.log.error.stacktrace = false
runtime.log.warn.stacktrace = false
runtime.log.info.stacktrace = false
runtime.log.invalid.reference = false
input.encoding=utf-8
output.encoding=utf-8
default.contentType=text/html
directive.foreach.counter.name = velocityCount
directive.foreach.counter.initial.value = 1
directive.include.output.errormsg.start = <!-- include error :
directive.include.output.errormsg.end = see error log -->
directive.parse.max.depth = 10
velocimacro.library = VM_global_library.vm
velocimacro.library.autoreload = true
velocimacro.permissions.allow.inline = true
velocimacro.permissions.allow.inline.to.replace.global = true
velocimacro.permissions.allow.inline.local.scope = true
runtime.interpolate.string.literals = true
resource.manager.class = org.apache.velocity.runtime.resource.ResourceManagerImpl
resource.manager.cache.class = org.apache.velocity.runtime.resource.ResourceCacheImpl
directive.foreach.maxloops = -1
4. 編寫velocity頁面
配置完後，寫一個vm頁面，該頁面的路徑在：WEB-INF/templates/views/下
#set($random=$mathTool.getRandom())
<title>velocity</title>
<!--公共css-->
<link href="${rc.contextPath}/css/reset.css?version=$random" rel="stylesheet">
<link href="${rc.contextPath}/css/public.css?version=$random" rel="stylesheet">
<link href="${rc.contextPath}/css/flight.css?version=$random" rel="stylesheet">
<!--pnrcss-->
<link href="${rc.contextPath}/css/pnr.css?version=$random" rel="stylesheet">
<link href="${rc.contextPath}/css/application.css?version=$random" rel="stylesheet">
<link href="${rc.contextPath}/css/order_new.css?version=$random" rel="stylesheet">
<link href="http://static.solaridc.com/allshared/js/doubledate/blue/doubleDate.css" rel="stylesheet" type="text/css" />
<!--日期選擇開始-->
<script type="text/javascript" src="${rc.contextPath}/js/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="${rc.contextPath}/js/common/layer/layer.js?version=1.0"></script>
<script type="text/javascript" src="${rc.contextPath}/laydate/laydate.js"></script>
<script type="text/javascript" src="${rc.contextPath}/layui/layui.all.js"></script>
<script type="text/javascript" src="${rc.contextPath}/js/profit/commonProfit.js?version=$random"></script>
<script type="text/javascript" src="${rc.contextPath}/js/profit/tradeOrderInfo.js?version=$random"></script>
<style>
.sel_btn{
height: 21px;
line-height: 21px;
padding: 0 11px;
background: #02bafa;
border: 1px #26bbdb solid;
border-radius: 3px;
color: #fff;
display: inline-block;
text-decoration: none;
font-size: 12px;
outline: none;
}
.sel_btn_style{
text-decoration: underline;
display: inline-block;
height: 22px;
text-align: center;
line-height: 22px;
zoom: 1;
padding: 0 8px;
text-decoration: none;
color: #2993d1;
}
</style>
<div class="main list_main">
<div class="pnr_import">
<ul class="tab">
<li><a href="/trade/velocity.in" style="width: 120px;">velocity</a><b></b></li>
</ul>
</div>
<div class="application_information">
<form name="tradeOrderInfos" id="tradeOrderInfos" action="/trade/velocity.in" method="post">
<input type="hidden" name="radioFlag" id="radioFlag" value="$!map.tradeOrderInfoVo.radioFlag">
<input id="downloadFlag" name="downloadFlag" type="hidden" value="false"/>
<input type="hidden" id="pageNo" name="pageNo" value="1"/>
<input type="hidden" id="weekData" name="weekData" value="$!map.tradeOrderInfoVo.weekChoose"/>
<ul class="mi_application">
<li>
<label>日期 ：</label>
<input type="text" readonly="readonly" name="queryDate" class="ipttxt doubledate ipticon idTerm2" value="$!map.tradeOrderInfoVo.queryDate"/>
</li>
<li style="width: 560px;">
<label style="width: 170px;">
週期<input type="radio" style="width:15px;" class="radioMonth" checked/>
月<input type="radio" style="width:15px;" class="radioWeek"/>
周<input type="radio" style="width:15px;" class="radioDay"/>
日
</label>
<select id="monthChoose" class="p_select_a search_platform ipttxt" name="monthChoose">
<option value="">全部</option>
<option value="1" #if($!map.tradeOrderInfoVo.monthChoose == 1) selected="selected" #end>一月</option>
<option value="2" #if($!map.tradeOrderInfoVo.monthChoose == 2) selected="selected" #end>二月</option>
<option value="3" #if($!map.tradeOrderInfoVo.monthChoose == 3) selected="selected" #end>三月</option>
<option value="4" #if($!map.tradeOrderInfoVo.monthChoose == 4) selected="selected" #end>四月</option>
<option value="5" #if($!map.tradeOrderInfoVo.monthChoose == 5) selected="selected" #end>五月</option>
<option value="6" #if($!map.tradeOrderInfoVo.monthChoose == 6) selected="selected" #end>六月</option>
<option value="7" #if($!map.tradeOrderInfoVo.monthChoose == 7) selected="selected" #end>七月</option>
<option value="8" #if($!map.tradeOrderInfoVo.monthChoose == 8) selected="selected" #end>八月</option>
<option value="9" #if($!map.tradeOrderInfoVo.monthChoose == 9) selected="selected" #end>九月</option>
<option value="10" #if($!map.tradeOrderInfoVo.monthChoose == 10) selected="selected" #end>十月</option>
<option value="11" #if($!map.tradeOrderInfoVo.monthChoose == 11) selected="selected" #end>十一月</option>
<option value="12" #if($!map.tradeOrderInfoVo.monthChoose == 12) selected="selected" #end>十二月</option>
</select>
<select id="weekChoose" class="p_select_a search_platform ipttxt" name="weekChoose">
</select>
<input type="text" id="startDayChoose" readonly="readonly" name="startDate" class="ipttxt doubledate ipticon idTerm2" value="$!map.tradeOrderInfoVo.startDate"/>
<span class="dayChoose">至</span>
<input type="text" id="endDayChoose" readonly="readonly" name="endDate" class="ipttxt doubledate ipticon idTerm2" value="$!map.tradeOrderInfoVo.endDate"/>
</li>
</ul>
<ul class="mi_application">
</ul>
<div class="appBtn">
<a class="font_button" style="cursor:pointer;" onclick="searchScreen('tradeOrderInfos')">立即查詢</a>
<a class="blue_button" style="cursor:pointer;" onclick="cleanFrom('tradeOrderInfos')">清空條件</a>
</div>
</form>
</div>
<div class="content_Order">
<table class="table bordertable tablecenter">
<tr>
<th>單號</th>
<th>類型</th>
</tr>
#foreach($tradeOrderInfo in $map.tradeOrderInfos.list)
<tr>
<td>
No$!tradeOrderInfo.objNo
</td>
<td>
$!tradeOrderInfo.paymentType
</td>
</tr>
#end
</table>
</div>
#page(${map.tradeOrderInfos.pageNum} ${map.tradeOrderInfos.navigatepageNums} ${map.tradeOrderInfos.pages} ${map.tradeOrderInfos.total} ${map.tradeOrderInfos.startRow} ${map.tradeOrderInfos.endRow} "tradeOrderInfos")
</div>
</div>
5. 控制層代碼
package com.liantuo.finance.web.controller.profit;
import com.github.pagehelper.PageInfo;
import com.liantuo.finance.domain.TradeOrderInfo;
import com.liantuo.finance.service.TradeOrderInfoService;
import com.liantuo.finance.utils.Result;
import com.liantuo.finance.vo.profit.TradeOrderInfoVo;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;
@Controller
@RequestMapping(value = "/trade")
public class VelocityController {
private static final Logger logger = Logger.getLogger(TradeOrderInfoController.class);
@Autowired
private TradeOrderInfoService tradeOrderInfoService;
@RequestMapping(value = "/velocity.in")
public ModelAndView velocity(HttpServletRequest request,
HttpServletResponse response,
TradeOrderInfoVo tradeOrderInfoVo) {
Map<String, Object> model = new HashMap<String, Object>();
Result<PageInfo<TradeOrderInfo>> result = null;
tradeOrderInfoVo.setPageSize(5);
try{
result = tradeOrderInfoService.selectTradeOrderInfoPage(tradeOrderInfoVo);
}catch (Exception e){
e.printStackTrace();
return new ModelAndView("common/Error");
}
model.put("tradeOrderInfos", result.getObject());
model.put("tradeOrderInfoVo", tradeOrderInfoVo);
return new ModelAndView("/profit/velocity", "map", model);
}
}
6. 頁面展示
請求路徑：http://127.0.0.1:8083/trade/velocity.in
