ksplatform学习笔记

1.viewResolver配置中的：

<bean id="viewResolver"
class="org.springframework.web.servlet.view.velocity.VelocityViewResolver">
<property name="suffix" value=".vm" />
<property name="exposeRequestAttributes" value="true" />
<property name="requestContextAttribute" value="request" />
<property name="exposeSpringMacroHelpers" value="true"/>
<property name="exposeSessionAttributes" value="true" />
<property name="contentType" value="text/html;charset=UTF-8" />
<property name="toolboxConfigLocation" value="WEB-INF/toolbox.xml"/>
<property name="viewClass" value="cn.com.ksplatform.core.expand.spring.velocity.VelocityToolbox20View"/>
</bean>

VelocityToolbox20View代码如下：

public class VelocityToolbox20View extends VelocityToolboxView {
    @Override
    protected Context createVelocityContext(Map<String, Object> model, HttpServletRequest request,
            HttpServletResponse response) throws Exception {// Create a
                                                            // ChainedContext
                                                            // instance.
        ViewToolContext ctx;

        ctx = new ViewToolContext(getVelocityEngine(), request, response, getServletContext());

        ctx.putAll(model);

        if (this.getToolboxConfigLocation() != null) {
            ToolManager tm = new ToolManager();
            tm.setVelocityEngine(getVelocityEngine());
            tm.configure(getServletContext().getRealPath(getToolboxConfigLocation()));
            if (tm.getToolboxFactory().hasTools(Scope.REQUEST)) {
                ctx.addToolbox(tm.getToolboxFactory().createToolbox(Scope.REQUEST));
            }
            if (tm.getToolboxFactory().hasTools(Scope.APPLICATION)) {
                ctx.addToolbox(tm.getToolboxFactory().createToolbox(Scope.APPLICATION));
            }
            if (tm.getToolboxFactory().hasTools(Scope.SESSION)) {
                ctx.addToolbox(tm.getToolboxFactory().createToolbox(Scope.SESSION));
            }
        }
        return ctx;
    }
}

　　

标红部分的作用是：说白了就是velocity在模板解析过程中想使用tool.xml文件中配置的类

3、配置velocity-tool

在实际使用中，需要配置一些velocity-tool

在spring对最新的velocity tool2.0 的支持不是太好，所以需要扩展viewClass类，才能读取velocitytool.Xml文件。

在没有使用layout的velocity中，需要可以直接继承VelocityToolboxView类，然后重写createVelocityContext方法，但是在VelocityLayoutViewResolver中却无法加载继承VelocityToolboxView的类，而是需要继承VelocityLayoutView，去查找源文件的类，发现VelocityLayoutView继承一样VelocityToolboxView类，所以直接继承VelocityLayoutView然后重写createVelocityContext方法，如下：

 

package com.cy.wxs.velocity;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.velocity.context.Context;
import org.apache.velocity.tools.Scope;
import org.apache.velocity.tools.ToolManager;
import org.apache.velocity.tools.view.ViewToolContext;
import org.springframework.web.servlet.view.velocity.VelocityLayoutView;


public classVelocityToolbox2View extends VelocityLayoutView{
     @Override
        protected ContextcreateVelocityContext(Map<String, Object> model,
                HttpServletRequest request,HttpServletResponse response)
                throws Exception {// Create a
                                    // ChainedContext
                                    // instance.
            ViewToolContext ctx;

            ctx = new ViewToolContext(getVelocityEngine(),request, response,
                    getServletContext());

            ctx.putAll(model);

            if (this.getToolboxConfigLocation() != null) {
                ToolManager tm = new ToolManager();
               tm.setVelocityEngine(getVelocityEngine());
               tm.configure(getServletContext().getRealPath(
                       getToolboxConfigLocation()));
                if (tm.getToolboxFactory().hasTools(Scope.REQUEST)) {
                   ctx.addToolbox(tm.getToolboxFactory().createToolbox(
                            Scope.REQUEST));
                }
                if (tm.getToolboxFactory().hasTools(Scope.APPLICATION)) {
                   ctx.addToolbox(tm.getToolboxFactory().createToolbox(
                            Scope.APPLICATION));
                }
                if (tm.getToolboxFactory().hasTools(Scope.SESSION)) {
                   ctx.addToolbox(tm.getToolboxFactory().createToolbox(
                            Scope.SESSION));
                }
            }
            return ctx;
        }

}

4、关于velocity tool2.0

Velocity的配置文件较与之前的配置的版本，在配置上有一些改变，具体的配置方法在velocity-tool2.0.jar包的位置：org.apache.velocity.tools.generic中