velocity学习

例子1：   package nc.jonathan.velocity; import java.io.StringWriter; import org.apache.velocity.VelocityContext; import org.apache.velocity.app.Velocity; import org.apache.velocity.exception.MethodInvocationException; import org.apache.velocity.exception.ParseErrorException; import org.apache.velocity.exception.ResourceNotFoundException; /**  * 第一个velocity学习类  *  * 采用默认初始化设置，解析字符串, 输出到字符串  *  * Create on 2006-4-3 10:12:38  *  * @author Jonathan Q. Bo  * @version 1.0 valocity study  */ public class QuickStartExample {  public static void main(String[] args){   try {    /* 初始化运行时引擎， 默认初始化 */    Velocity.init();        /* 建立context， 并放入数据*/    VelocityContext context = new VelocityContext();    context.put("project","jonathan's velocity");    context.put("name","first example");        /* 解析后数据的输出目标，java.io.Writer的子类 */    StringWriter w = new StringWriter();        /* 此处采用字符串模版 */    String s = "We are using string velocity to generate $project $name";        /* 进行解析 */    Velocity.evaluate(context,w,"mystring",s);    System.out.println(w);   } catch (ResourceNotFoundException e1) {    System.out.println("## 源文件不存在！");    e1.printStackTrace();   } catch (ParseErrorException e2) {    System.out.println("## 解析文件错误！");    e2.printStackTrace();   } catch (MethodInvocationException e3) {    System.out.println("## 方法调用异常!");    e3.printStackTrace();   } catch (Exception e4){    System.out.println("## 其他错误!");    e4.printStackTrace();   }  } } 输出结果 We are using string velocity to generate jonathan's velocity first example

 

 

 

例子2：

String result;

Map<String, Object> map = new HashMap<String, Object>();

            map.put("uri", uriBrokerService);

String instring="$uri.getURIBroker('mlproductpostingServer')/posting/postMlProduct.htm";

          

VelocityContext context = new VelocityContext(map );

        StringWriter writer = new StringWriter();

        ve.evaluate(context, writer, LOG_TAG, instring);

 

        result= writer.getBuffer().toString();