如何使用Freemarker生成java代码

Freemarker是一个模板框架。我们可以通过Freemarker进行代码生成或页面的静态生成。 现在简单的说一下怎样使用Freemarker Freemarker的主要生成类

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public boolean generate(String templateFileName, Map data,

String fileName) {

try {

//取得模板的位置

String templateFileDir=templateFileName.substring(0, templateFileName.lastIndexOf("/"));

//取得模板的名字

String templateFile=templateFileName.substring(templateFileName.lastIndexOf("/"), templateFileName.length());

//取得生成文件的路径

String genFileDir=fileName.substring(0, fileName.lastIndexOf("/"));

Template template = ConfigurationHelper.getConfiguration(templateFileDir).getTemplate(templateFile);

File fileDir=new File(genFileDir);

org.apache.commons.io.FileUtils.forceMkdir(fileDir);

File output = new File(fileName);

if(output.exists()){

//如何代码已存在不重复生成

return false;

}

Writer writer = new FileWriter(output);

template.process(data, writer);

writer.close();

} catch (TemplateException e) {

e.printStackTrace();

return false;

} catch (IOException e) {

e.printStackTrace();

return false;

}

return true;

}

代码中的Map 是模板所需要的数据，我们可以通过面向对像的方法把数据存在模板中public boolean genDaoInterface(String fileName){

DaoModel daoModel=new DaoModel();

//设置Dao实现类的包名

daoModel.setPackageName(DaoConstant.PACKAGE);

//取得接口名

String className=StringUtils.substringBefore(fileName,".");

//设置接口名

daoModel.setClassName(className);

MapString, Object data = new HashMapString, Object();

data.put("model", daoModel);

//设置生成的位置

String filePath=new String("src/"+package2path(DaoConstant.PACKAGE)+"/"+fileName);

//代码生成

return super.generate(DaoConstant.INTERFACE_TEMPLATE, data, filePath);

}

data.put("model", daoModel);由这句代码可看出我们将可以在模板中直接调用这些数据package ${model.packageName};

public interface ${model.className} extends BaseHibernateDao {

}

java代码生成器怎么用

zip包，然后自动下载下来

1.预先定义好模板

2.界面输入相关参数

3.解析模板生成代码并下载

最后放出源代码：

package com.et.controller.system.createcode;

import java.util.ArrayList;

import java.util.Date;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import com.et.controller.base.BaseController;

import com.et.util.DelAllFile;

import com.et.util.FileDownload;

import com.et.util.FileZip;

import com.et.util.Freemarker;

import com.et.util.PageData;

import com.et.util.PathUtil;

/**

* 类名称：FreemarkerController

* 创建人：Harries

* 创建时间：2015年1月12日

* @version

*/

@Controller

@RequestMapping(value=”/createCode”)

public class CreateCodeController extends BaseController {

/**

* 生成代码

*/

@RequestMapping(value=”/proCode”)

public void proCode(HttpServletResponse response) throws Exception{

PageData pd = new PageData();

pd = this.getPageData();

/* ============================================================================================= */

String packageName = pd.getString(“packageName”); //包名 ========1

String objectName = pd.getString(“objectName”); //类名 ========2

String tabletop = pd.getString(“tabletop”); //表前缀 ========3

tabletop = null == tabletop?””:tabletop.toUpperCase(); //表前缀转大写

String zindext = pd.getString(“zindex”); //属性总数

int zindex = 0;

if(null != zindext !””.equals(zindext)){

zindex = Integer.parseInt(zindext);

}

ListString[] fieldList = new ArrayListString[](); //属性集合 ========4

for(int i=0; i zindex; i++){

fieldList.add(pd.getString(“field”+i).split(“,fh,”)); //属性放到集合里面

}

MapString,Object root = new HashMapString,Object(); //创建数据模型

root.put(“fieldList”, fieldList);

root.put(“packageName”, packageName); //包名

root.put(“objectName”, objectName); //类名

root.put(“objectNameLower”, objectName.toLowerCase()); //类名(全小写)

root.put(“objectNameUpper”, objectName.toUpperCase()); //类名(全大写)

root.put(“tabletop”, tabletop); //表前缀

root.put(“nowDate”, new Date()); //当前日期

DelAllFile.delFolder(PathUtil.getClasspath()+”admin/ftl”); //生成代码前,先清空之前生成的代码

/* ============================================================================================= */

String filePath = “admin/ftl/code/”; //存放路径

String ftlPath = “createCode”; //ftl路径

/*生成controller*/

Freemarker.printFile(“controllerTemplate.ftl”, root, “controller/”+packageName+”/”+objectName.toLowerCase()+”/”+objectName+”Controller.java”, filePath, ftlPath);

/*生成service*/

Freemarker.printFile(“serviceTemplate.ftl”, root, “service/”+packageName+”/”+objectName.toLowerCase()+”/”+objectName+”Service.java”, filePath, ftlPath);

/*生成mybatis xml*/

Freemarker.printFile(“mapperMysqlTemplate.ftl”, root, “mybatis_mysql/”+packageName+”/”+objectName+”Mapper.xml”, filePath, ftlPath);

Freemarker.printFile(“mapperOracleTemplate.ftl”, root, “mybatis_oracle/”+packageName+”/”+objectName+”Mapper.xml”, filePath, ftlPath);

/*生成SQL脚本*/

Freemarker.printFile(“mysql_SQL_Template.ftl”, root, “mysql数据库脚本/”+tabletop+objectName.toUpperCase()+”.sql”, filePath, ftlPath);

Freemarker.printFile(“oracle_SQL_Template.ftl”, root, “oracle数据库脚本/”+tabletop+objectName.toUpperCase()+”.sql”, filePath, ftlPath);

/*生成jsp页面*/

Freemarker.printFile(“jsp_list_Template.ftl”, root, “jsp/”+packageName+”/”+objectName.toLowerCase()+”/”+objectName.toLowerCase()+”_list.jsp”, filePath, ftlPath);

Freemarker.printFile(“jsp_edit_Template.ftl”, root, “jsp/”+packageName+”/”+objectName.toLowerCase()+”/”+objectName.toLowerCase()+”_edit.jsp”, filePath, ftlPath);

/*生成说明文档*/

Freemarker.printFile(“docTemplate.ftl”, root, “说明.doc”, filePath, ftlPath);

//this.print(“oracle_SQL_Template.ftl”, root); 控制台打印

/*生成的全部代码压缩成zip文件*/

FileZip.zip(PathUtil.getClasspath()+”admin/ftl/code”, PathUtil.getClasspath()+”admin/ftl/code.zip”);

/*下载代码*/

FileDownload.fileDownload(response, PathUtil.getClasspath()+”admin/ftl/code.zip”, “code.zip”);

}

}

java如何根据word模板生成word文档

首先是action的createDoc方法：

[java]

/**

* 通过HttpCient调用报告服务器的方法生成报告 DOC

*/

public String createDoc() throws Exception {

//定义放回成功与否的判断码

String prMsg="";

// 获取当前登录的用户

UserVo userVo = CommonUtils.getUserMessage();

//获取模版类型

docType = Struts2Utils.getParameter("docType");

//重新创建文档

String creatOrnot = Struts2Utils.getParameter("creatOrnot");

//获取组组编号参数

workgroupId = Struts2Utils.getParameter("workgroupId");

//获取评估用例实例ID参数

evtcaseInstId = Struts2Utils.getParameter("evtcaseInstId");

if(CommonUtils.isNotNull(docType)){

//获取项目Id

projectId = Struts2Utils.getParameter("projectId");

if(!CommonUtils.isNotNull(projectId)){

if(CommonUtils.isNotNull(this.getIdFromSession("PM_PROJECTID"))){

projectId = this.getIdFromSession("PM_PROJECTID").toString();

}else{

Struts2Utils.getRequest().setAttribute("msg", "请先选择项目!");

}

}

if(CommonUtils.isNotNull(projectId)){

prMsg = infoSystemDescService.downloadFileByUrl(projectId, userVo.getUserId(), workgroupId, evtcaseInstId, docType, creatOrnot);

}

}

return "docList";

}

注：在我贴出来的代码中，能看懂就行了，有些不用管他（可能是其他业务方面的判断）,关于最后返回的prMsg---代表各种状态 主要表示成功与否或者是出错的信息。

接着我贴出service层的方法downloadFileByUrl

[java]

/prep/pp/ppre name="code" class="java"pre name="code" class="java"/**

* 功能：

* 1.(生成报告文档)

* 2.保存指定URL的源文件到指定路径下

* @param projectId

* @param userId

* @param workgroupId

* @param evtcaseInstId

* @param docType

* @param creatOrnot

* @return

* @throws Exception

*/

@SuppressWarnings("deprecation")

public synchronized String downloadFileByUrl(String projectId,String userId,String workgroupId,String evtcaseInstId,String docType,String creatOrnot) throws Exception {

String msg = "1";//"1":默认为创建成功的提示信息 "2":标识创建失败

String srcUrl = ""; //报告服务器的执行路径

HttpResponse response = null;

FileOutputStream out = null;

HttpClient httpclient = null;

HttpGet httpget = null;

long time1 = System.currentTimeMillis();

//获取保存后的路径

TProjDoc projDoc = projectDocDao.findFileByType(userId, Integer.parseInt(docType), Long.parseLong(projectId), workgroupId,evtcaseInstId);

if(projDoc == null || (projDoc != null CommonUtils.isNotNull(creatOrnot) creatOrnot.equals("1"))){ //FT_任务编号_[FID]

try {

//获取报告服务器的执行路径

srcUrl = xmlPathDef.getActionUrl(docType, projectId,userId,workgroupId,evtcaseInstId);

HttpParams httpParams = new BasicHttpParams();

// 设置最大连接数

ConnManagerParams.setMaxTotalConnections(httpParams, 1);

// 设置获取连接的最大等待时间

//ConnManagerParams.setTimeout(httpParams, 6000);

// 设置每个路由最大连接数

ConnPerRouteBean connPerRoute = new ConnPerRouteBean(1);

ConnManagerParams.setMaxConnectionsPerRoute(httpParams,connPerRoute);

// 设置连接超时时间

HttpConnectionParams.setConnectionTimeout(httpParams, 6000);

// 设置读取超时时间

if(docType.toString().equals(XmlPathDef.SPOTTEST_DOC) docType.toString().equals(XmlPathDef.FTEST_DOC)){

HttpConnectionParams.setSoTimeout(httpParams, 2400000);

}else{

HttpConnectionParams.setSoTimeout(httpParams, 600000);

}

SchemeRegistry registry = new SchemeRegistry();

registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));

registry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));

ClientConnectionManager connectionManager = new ThreadSafeClientConnManager(httpParams, registry);

httpclient = new DefaultHttpClient(connectionManager, httpParams);

httpget = new HttpGet(srcUrl);

//执行返回

response = httpclient.execute(httpget);

//如果是本机既当服务器，又当报表服务器，那么就只生成一遍

String ipvalues = xmlPathDef.getRepUrl();

if(CommonUtils.isNotNull(ipvalues)){

if(ipvalues.indexOf(":") != -1){

ipvalues = ipvalues.substring(0,ipvalues.lastIndexOf(":"));

}

}

HttpEntity entity = response.getEntity();

//获取保存后的路径

projDoc = projectDocDao.findFileByType(userId,Integer.parseInt(docType), Long.parseLong(projectId), workgroupId,evtcaseInstId);

String filePath = "";

if(projDoc != null)

filePath = projDoc.getPath();

if(CommonUtils.isNotNull(filePath)){

String basepath = XmlPathDef.getBasePath();

String outFilePath = (basepath + filePath).replaceAll("\\\\", "\\/");

XmlPathDef.isExists(outFilePath);

File wdFile = new File(outFilePath);

out = new FileOutputStream(wdFile);

int l;

byte[] tmp = new byte[2048];

while ((l = instream.read(tmp)) != -1) {

out.write(tmp, 0, l);

}

out.flush();

out.close();

System.out.println("****************************** ");

System.out.println("");

System.out.println("*************** 恭喜！ 报告创建成功 结束 ***************");

System.out.println("");

}else{

msg = "8";//说明word创建成功，但是数据没有保存成功

response = null;

}

}else{

msg = "2";

}

} catch (ClientProtocolException e) {

msg = "7";

e.printStackTrace();

} catch (IOException e) {

msg = "7";

logger.error("数据库报告服务器地址配置错误或网络不通！！2.连接是否超时" + e.getMessage());

e.printStackTrace();

}finally{

if(out!=null){

try {

out.close();

} catch (IOException e) {

msg = "7";

logger.error("数据库报告服务器地址配置错误或网络不通！！2.连接是否超时" + e.getMessage());

e.printStackTrace();

}

}

}

}

long time2 = System.currentTimeMillis();

long numTime = time2 - time1;

if(docType.toString().equals(XmlPathDef.SPOTTEST_DOC) docType.toString().equals(XmlPathDef.FTEST_DOC)){

if(numTime = 2401000){

msg = "9";

}

}else{

if(numTime = 601000){

msg = "9";

}

}

System.out.println("");

String loggerinfo = "********* 报告类型为 ：" + docType + " 执行时间为: " + (time2 - time1) /1000 + " 秒！***************";

System.out.println(loggerinfo);

System.out.println("");

System.out.println("*****************************");

logger.info(loggerinfo);

return msg;

}

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