如何使用Freemarker生成java代碼

Freemarker是一個(gè)模板框架。我們可以通過(guò)Freemarker進(jìn)行代碼生成或頁(yè)面的靜態(tài)生成。 現(xiàn)在簡(jiǎn)單的說(shuō)一下怎樣使用Freemarker Freemarker的主要生成類(lèi)

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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());

//取得生成文件的路徑

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()){

//如何代碼已存在不重復(fù)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;

}

代碼中的Map 是模板所需要的數(shù)據(jù)，我們可以通過(guò)面向?qū)ο竦姆椒ò褦?shù)據(jù)存在模板中public boolean genDaoInterface(String fileName){

DaoModel daoModel=new DaoModel();

//設(shè)置Dao實(shí)現(xiàn)類(lèi)的包名

daoModel.setPackageName(DaoConstant.PACKAGE);

//取得接口名

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

//設(shè)置接口名

daoModel.setClassName(className);

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

data.put("model", daoModel);

//設(shè)置生成的位置

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

//代碼生成

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

}

data.put("model", daoModel);由這句代碼可看出我們將可以在模板中直接調(diào)用這些數(shù)據(jù)package ${model.packageName};

public interface ${model.className} extends BaseHibernateDao {

}

java代碼生成器怎么用

zip包，然后自動(dòng)下載下來(lái)

1.預(yù)先定義好模板

2.界面輸入相關(guān)參數(shù)

3.解析模板生成代碼并下載

最后放出源代碼：

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;

/**

* 類(lèi)名稱(chēng)：FreemarkerController

* 創(chuàng)建人：Harries

* 創(chuàng)建時(shí)間：2015年1月12日

* @version

*/

@Controller

@RequestMapping(value=”/createCode”)

public class CreateCodeController extends BaseController {

/**

* 生成代碼

*/

@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”); //類(lèi)名 ========2

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

tabletop = null == tabletop?””:tabletop.toUpperCase(); //表前綴轉(zhuǎn)大寫(xiě)

String zindext = pd.getString(“zindex”); //屬性總數(shù)

int zindex = 0;

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

zindex = Integer.parseInt(zindext);

}

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

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

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

}

MapString,Object root = new HashMapString,Object(); //創(chuàng)建數(shù)據(jù)模型

root.put(“fieldList”, fieldList);

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

root.put(“objectName”, objectName); //類(lèi)名

root.put(“objectNameLower”, objectName.toLowerCase()); //類(lèi)名(全小寫(xiě))

root.put(“objectNameUpper”, objectName.toUpperCase()); //類(lèi)名(全大寫(xiě))

root.put(“tabletop”, tabletop); //表前綴

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

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

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

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

String ftlPath = “createCode”; //ftl路徑

/*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腳本*/

Freemarker.printFile(“mysql_SQL_Template.ftl”, root, “mysql數(shù)據(jù)庫(kù)腳本/”+tabletop+objectName.toUpperCase()+”.sql”, filePath, ftlPath);

Freemarker.printFile(“oracle_SQL_Template.ftl”, root, “oracle數(shù)據(jù)庫(kù)腳本/”+tabletop+objectName.toUpperCase()+”.sql”, filePath, ftlPath);

/*生成jsp頁(yè)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);

/*生成說(shuō)明文檔*/

Freemarker.printFile(“docTemplate.ftl”, root, “說(shuō)明.doc”, filePath, ftlPath);

//this.print(“oracle_SQL_Template.ftl”, root); 控制臺(tái)打印

/*生成的全部代碼壓縮成zip文件*/

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

/*下載代碼*/

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

}

}

java如何根據(jù)word模板生成word文檔

首先是action的createDoc方法：

[java]

/**

* 通過(guò)HttpCient調(diào)用報(bào)告服務(wù)器的方法生成報(bào)告 DOC

*/

public String createDoc() throws Exception {

//定義放回成功與否的判斷碼

String prMsg="";

// 獲取當(dāng)前登錄的用戶(hù)

UserVo userVo = CommonUtils.getUserMessage();

//獲取模版類(lèi)型

docType = Struts2Utils.getParameter("docType");

//重新創(chuàng)建文檔

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

//獲取組組編號(hào)參數(shù)

workgroupId = Struts2Utils.getParameter("workgroupId");

//獲取評(píng)估用例實(shí)例ID參數(shù)

evtcaseInstId = Struts2Utils.getParameter("evtcaseInstId");

if(CommonUtils.isNotNull(docType)){

//獲取項(xiàng)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", "請(qǐng)先選擇項(xiàng)目!");

}

}

if(CommonUtils.isNotNull(projectId)){

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

}

}

return "docList";

}

注：在我貼出來(lái)的代碼中，能看懂就行了，有些不用管他（可能是其他業(yè)務(wù)方面的判斷）,關(guān)于最后返回的prMsg---代表各種狀態(tài) 主要表示成功與否或者是出錯(cuò)的信息。

接著我貼出service層的方法downloadFileByUrl

[java]

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

* 功能：

* 1.(生成報(bào)告文檔)

* 2.保存指定URL的源文件到指定路徑下

* @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":默認(rèn)為創(chuàng)建成功的提示信息 "2":標(biāo)識(shí)創(chuàng)建失敗

String srcUrl = ""; //報(bào)告服務(wù)器的執(zhí)行路徑

HttpResponse response = null;

FileOutputStream out = null;

HttpClient httpclient = null;

HttpGet httpget = null;

long time1 = System.currentTimeMillis();

//獲取保存后的路徑

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_任務(wù)編號(hào)_[FID]

try {

//獲取報(bào)告服務(wù)器的執(zhí)行路徑

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

HttpParams httpParams = new BasicHttpParams();

// 設(shè)置最大連接數(shù)

ConnManagerParams.setMaxTotalConnections(httpParams, 1);

// 設(shè)置獲取連接的最大等待時(shí)間

//ConnManagerParams.setTimeout(httpParams, 6000);

// 設(shè)置每個(gè)路由最大連接數(shù)

ConnPerRouteBean connPerRoute = new ConnPerRouteBean(1);

ConnManagerParams.setMaxConnectionsPerRoute(httpParams,connPerRoute);

// 設(shè)置連接超時(shí)時(shí)間

HttpConnectionParams.setConnectionTimeout(httpParams, 6000);

// 設(shè)置讀取超時(shí)時(shí)間

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);

//執(zhí)行返回

response = httpclient.execute(httpget);

//如果是本機(jī)既當(dāng)服務(wù)器，又當(dāng)報(bào)表服務(wù)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();

//獲取保存后的路徑

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！ 報(bào)告創(chuàng)建成功 結(jié)束 ***************");

System.out.println("");

}else{

msg = "8";//說(shuō)明word創(chuàng)建成功，但是數(shù)據(jù)沒(méi)有保存成功

response = null;

}

}else{

msg = "2";

}

} catch (ClientProtocolException e) {

msg = "7";

e.printStackTrace();

} catch (IOException e) {

msg = "7";

logger.error("數(shù)據(jù)庫(kù)報(bào)告服務(wù)器地址配置錯(cuò)誤或網(wǎng)絡(luò)不通??！2.連接是否超時(shí)" + e.getMessage());

e.printStackTrace();

}finally{

if(out!=null){

try {

out.close();

} catch (IOException e) {

msg = "7";

logger.error("數(shù)據(jù)庫(kù)報(bào)告服務(wù)器地址配置錯(cuò)誤或網(wǎng)絡(luò)不通??！2.連接是否超時(shí)" + 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 = "********* 報(bào)告類(lèi)型為 ：" + docType + " 執(zhí)行時(shí)間為: " + (time2 - time1) /1000 + " 秒！***************";

System.out.println(loggerinfo);

System.out.println("");

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

logger.info(loggerinfo);

return msg;

}

新聞名稱(chēng)：java代碼模板生成 java 代碼生成
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