JEESITE快速开发平台（七）代码生成原理

一、原理讲解

jeesite代码生成用的是FreeMarker模板引擎结合xml技术来实现的，定义的模板都放在resources/templates/modules/gen下

一看就知道crud就是基本的增删改查，dao是数据库操作，treetable是有关树方面的模板，其中主要的配置文件就是config.xml,该文件中定义了生成的模板，以及java类型,查询类型,字段显示类型等一些数据。

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<?xml version="1.0" encoding="utf-8"?>
<config>
<category>
<category value="curd" label="增删改查（单表）">
<template>curd/controller.xml</template>
<template>curd/service.xml</template>
<template>category-ref:dao</template>
<template>curd/viewForm.xml</template>
<template>curd/viewList.xml</template>
</category>
<category value="curd_many" label="增删改查（一对多）">
<template>curd/controller.xml</template>
<template>curd/serviceMany.xml</template>
<template>category-ref:dao</template>
<template>curd/viewFormMany.xml</template>
<template>curd/viewList.xml</template>
<childTable>
<template>category-ref:dao</template>
</childTable>
</category>
<category value="dao" label="仅持久层（dao/entity/mapper）">
<template>dao/dao.xml</template>
<template>dao/entity.xml</template>
<template>dao/mapper.xml</template>
</category>
<category value="treeTable" label="树结构表（一体）">
<template>treetable/controller.xml</template>
<template>treetable/service.xml</template>
<template>treetable/dao.xml</template>
<template>treetable/entity.xml</template>
<template>treetable/mapper.xml</template>
<template>treetable/viewForm.xml</template>
<template>treetable/viewList.xml</template>
</category>
<category value="treeTableAndList" label="树结构表（左树右表）">
<template>category-ref:dao</template>
</category>
</category>
<javaType>
<dict value="String" label="String"/>
<dict value="Long" label="Long"/>
<dict value="Integer" label="Integer"/>
<dict value="Double" label="Double"/>
<dict value="java.util.Date" label="Date"/>
<dict value="com.thinkgem.jeesite.modules.sys.entity.User" label="User"/>
<dict value="com.thinkgem.jeesite.modules.sys.entity.Office" label="Office"/>
<dict value="com.thinkgem.jeesite.modules.sys.entity.Area" label="Area"/>
<dict value="This" label="ThisObj" description="生成当前对象"/>
<dict value="Custom" label="Custom" description="自定义对象，生成后手动设置"/>
</javaType>
<queryType>
<dict value="=" label="="/>
<dict value="!=" label="!="/>
<dict value=">" label=">"/>
<dict value=">=" label=">="/>
<dict value="<" label="<"/>
<dict value="<=" label="<="/>
<dict value="between" label="Between"/>
<dict value="like" label="Like"/>
<dict value="left_like" label="Left Like"/>
<dict value="right_like" label="Right Like"/>
</queryType>
<showType>
<dict value="input" label="单行文本"/>
<dict value="textarea" label="多行文本"/>
<dict value="select" label="下拉选项"/>
<dict value="radiobox" label="单选按钮"/>
<dict value="checkbox" label="复选框"/>
<dict value="dateselect" label="日期选择"/>
<dict value="userselect" label="人员选择"/>
<dict value="officeselect" label="部门选择"/>
<dict value="areaselect" label="区域选择"/>
<dict value="treeselect" label="树选择控件"/>
<dict value="fileselect" label="文件上传选择"/>
</showType>
</config>

其中

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<childTable>
<template>category-ref:dao</template>
</childTable>

定义了子表，初看jeesite的代码生成，有个困惑的地方就是,一般通过FreeMarker进行代码生成定义的模板都是ftl格式的，而这里却是xml，什么鬼，难道这里不是用FreeMarker进行生成的??我们先来看下xml文件中的内容就清楚了:

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<?xml version="1.0" encoding="utf-8"?>
<template>
<name>controller</name>
<filePath>src/main/java/${packageName}/${moduleName}/web/${subModuleName}</filePath>
<fileName>${ClassName}Controller.java</fileName>
<content><![CDATA[
/**
* Copyright © 2012-2016 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
*/
package ${packageName}.${moduleName}.web<#if subModuleName != "">.${subModuleName}</#if>;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.shiro.authz.annotation.RequiresPermissions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import com.thinkgem.jeesite.common.config.Global;
import com.thinkgem.jeesite.common.persistence.Page;
import com.thinkgem.jeesite.common.web.BaseController;
import com.thinkgem.jeesite.common.utils.StringUtils;
import ${packageName}.${moduleName}.entity<#if subModuleName != "">.${subModuleName}</#if>.${ClassName};
import ${packageName}.${moduleName}.service<#if subModuleName != "">.${subModuleName}</#if>.${ClassName}Service;
/**
* ${functionName}Controller
* @author ${functionAuthor}
* @version ${functionVersion}
*/
@Controller
@RequestMapping(value = "${r"${adminPath}"}/${urlPrefix}")
public class ${ClassName}Controller extends BaseController {
@Autowired
private ${ClassName}Service ${className}Service;
@ModelAttribute
public ${ClassName} get(@RequestParam(required=false) String id) {
${ClassName} entity = null;
if (StringUtils.isNotBlank(id)){
entity = ${className}Service.get(id);
}
if (entity == null){
entity = new ${ClassName}();
}
return entity;
}
@RequiresPermissions("${permissionPrefix}:view")
@RequestMapping(value = {"list", ""})
public String list(${ClassName} ${className}, HttpServletRequest request, HttpServletResponse response, Model model) {
Page<${ClassName}> page = ${className}Service.findPage(new Page<${ClassName}>(request, response), ${className});
model.addAttribute("page", page);
return "${lastPackageName}/${viewPrefix}List";
}
@RequiresPermissions("${permissionPrefix}:view")
@RequestMapping(value = "form")
public String form(${ClassName} ${className}, Model model) {
model.addAttribute("${className}", ${className});
return "${lastPackageName}/${viewPrefix}Form";
}
@RequiresPermissions("${permissionPrefix}:edit")
@RequestMapping(value = "save")
public String save(${ClassName} ${className}, Model model, RedirectAttributes redirectAttributes) {
if (!beanValidator(model, ${className})){
return form(${className}, model);
}
${className}Service.save(${className});
addMessage(redirectAttributes, "保存${functionNameSimple}成功");
return "redirect:"+Global.getAdminPath()+"/${viewPrefix}/?repage";
}
@RequiresPermissions("${permissionPrefix}:edit")
@RequestMapping(value = "delete")
public String delete(${ClassName} ${className}, RedirectAttributes redirectAttributes) {
${className}Service.delete(${className});
addMessage(redirectAttributes, "删除${functionNameSimple}成功");
return "redirect:"+Global.getAdminPath()+"/${viewPrefix}/?repage";
}
}]]>
</content>
</template>

其中的xml格式为:

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<?xml version="1.0" encoding="utf-8"?>
<template>
<name>controller</name>
<filePath>src/main/java/${packageName}/${moduleName}/web/${subModuleName}</filePath>
<fileName>${ClassName}Controller.java</fileName>
<content><![CDATA[]]>
</content>
</template>

发现其中的奥秘没，他把模板内容都放在了content标签的CDATA[]区。而且config.xml有相对应的bean，用来实现xml转对象:

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/**
* 生成方案Entity
* @author ThinkGem
* @version 2013-10-15
*/
@XmlRootElement(name="config")
public class GenConfig implements Serializable {
private static final long serialVersionUID = 1L;
private List<GenCategory> categoryList; // 代码模板分类
private List<Dict> javaTypeList; // Java类型
private List<Dict> queryTypeList; // 查询类型
private List<Dict> showTypeList; // 显示类型
public GenConfig() {
super();
}
@XmlElementWrapper(name = "category")
@XmlElement(name = "category")
public List<GenCategory> getCategoryList() {
return categoryList;
}
public void setCategoryList(List<GenCategory> categoryList) {
this.categoryList = categoryList;
}
@XmlElementWrapper(name = "javaType")
@XmlElement(name = "dict")
public List<Dict> getJavaTypeList() {
return javaTypeList;
}
public void setJavaTypeList(List<Dict> javaTypeList) {
this.javaTypeList = javaTypeList;
}
@XmlElementWrapper(name = "queryType")
@XmlElement(name = "dict")
public List<Dict> getQueryTypeList() {
return queryTypeList;
}
public void setQueryTypeList(List<Dict> queryTypeList) {
this.queryTypeList = queryTypeList;
}
@XmlElementWrapper(name = "showType")
@XmlElement(name = "dict")
public List<Dict> getShowTypeList() {
return showTypeList;
}
public void setShowTypeList(List<Dict> showTypeList) {
this.showTypeList = showTypeList;
}
}

其中的

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private List<GenCategory> categoryList; // 代码模板分类
private List<Dict> javaTypeList; // Java类型
private List<Dict> queryTypeList; // 查询类型
private List<Dict> showTypeList; // 显示类型

对应的就是xml中预先定义好的

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<?xml version="1.0" encoding="utf-8"?>
<config>
<category>
<category value="curd" label="增删改查（单表）">
<template>curd/controller.xml</template>
....
</category>
<category value="curd_many" label="增删改查（一对多）">
<template>curd/controller.xml</template>
....
<childTable>
<template>category-ref:dao</template>
</childTable>
</category>
<category value="dao" label="仅持久层（dao/entity/mapper）">
<template>dao/dao.xml</template>
....
</category>
<category value="treeTable" label="树结构表（一体）">
<template>treetable/controller.xml</template>
....
</category>
<category value="treeTableAndList" label="树结构表（左树右表）">
<template>category-ref:dao</template>
</category>
</category>
<javaType>
<dict value="String" label="String"/>
....
</javaType>
<queryType>
<dict value="=" label="="/>
....
</queryType>
<showType>
<dict value="input" label="单行文本"/>
<dict value="textarea" label="多行文本"/>
....
</showType>
</config>

其中的代码模板分类

通过@XmlElement(name = "category")引用了GenCategory类，其中定义了主子模板

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/**
* 生成方案Entity
* @author ThinkGem
* @version 2013-10-15
*/
@XmlRootElement(name="category")
public class GenCategory extends Dict {
private static final long serialVersionUID = 1L;
private List<String> template; // 主表模板
private List<String> childTableTemplate;// 子表模板
public static String CATEGORY_REF = "category-ref:";
public GenCategory() {
super();
}
@XmlElement(name = "template")
public List<String> getTemplate() {
return template;
}
public void setTemplate(List<String> template) {
this.template = template;
}
@XmlElementWrapper(name = "childTable")
@XmlElement(name = "template")
public List<String> getChildTableTemplate() {
return childTableTemplate;
}
public void setChildTableTemplate(List<String> childTableTemplate) {
this.childTableTemplate = childTableTemplate;
}
}

这两个主子其实对应的就是

在GenUtils中通过getConfig()方法可获取转换成bean的对象

而其中的数据就是在配置业务表是初始化的一些数据,比如当我们选择某一张表时，然后点击下一步

就会调用GenTableController中的form方法，把一些配置参数设置进去

然后在genTableForm.jsp页面进行渲染

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<%@ page contentType="text/html;charset=UTF-8" %>
<%@ include file="/WEB-INF/views/include/taglib.jsp"%>
<html>
<head>
<title>业务表管理</title>
<meta name="decorator" content="default"/>
<script type="text/javascript">
$(document).ready(function() {
$("#comments").focus();
$("#inputForm").validate({
submitHandler: function(form){
loading('正在提交，请稍等...');
$("input[type=checkbox]").each(function(){
$(this).after("<input type=\"hidden\" name=\""+$(this).attr("name")+"\" value=\""
+($(this).attr("checked")?"1":"0")+"\"/>");
$(this).attr("name", "_"+$(this).attr("name"));
});
form.submit();
},
errorContainer: "#messageBox",
errorPlacement: function(error, element) {
$("#messageBox").text("输入有误，请先更正。");
if (element.is(":checkbox")||element.is(":radio")||element.parent().is(".input-append")){
error.appendTo(element.parent().parent());
} else {
error.insertAfter(element);
}
}
});
});
</script>
</head>
<body>
<ul class="nav nav-tabs">
<li><a href="${ctx}/gen/genTable/">业务表列表</a></li>
<li class="active"><a href="${ctx}/gen/genTable/form?id=${genTable.id}&name=${genTable.name}">业务表<shiro:hasPermission name="gen:genTable:edit">${not empty genTable.id?'修改':'添加'}</shiro:hasPermission><shiro:lacksPermission name="gen:genTable:edit">查看</shiro:lacksPermission></a></li>
</ul>
<c:choose>
<c:when test="${empty genTable.name}">
<form:form id="inputForm" modelAttribute="genTable" action="${ctx}/gen/genTable/form" method="post" class="form-horizontal">
<form:hidden path="id"/>
<sys:message content="${message}"/>
<br/>
<div class="control-group">
<label class="control-label">表名:</label>
<div class="controls">
<form:select path="name" class="input-xxlarge">
<form:options items="${tableList}" itemLabel="nameAndComments" itemValue="name" htmlEscape="false"/>
</form:select>
</div>
<div class="form-actions">
<input id="btnSubmit" class="btn btn-primary" type="submit" value="下一步"/>
<input id="btnCancel" class="btn" type="button" value="返回" onclick="history.go(-1)"/>
</div>
</div>
</form:form>
</c:when>
<c:otherwise>
<form:form id="inputForm" modelAttribute="genTable" action="${ctx}/gen/genTable/save" method="post" class="form-horizontal">
<form:hidden path="id"/>
<sys:message content="${message}"/>
<fieldset>
<legend>基本信息</legend>
<div class="control-group">
<label class="control-label">表名:</label>
<div class="controls">
<form:input path="name" htmlEscape="false" maxlength="200" class="required" readonly="true"/>
</div>
</div>
<div class="control-group">
<label class="control-label">说明:</label>
<div class="controls">
<form:input path="comments" htmlEscape="false" maxlength="200" class="required"/>
</div>
</div>
<div class="control-group">
<label class="control-label">类名:</label>
<div class="controls">
<form:input path="className" htmlEscape="false" maxlength="200" class="required"/>
</div>
</div>
<div class="control-group">
<label class="control-label">父表表名:</label>
<div class="controls">
<form:select path="parentTable" cssClass="input-xlarge">
<form:option value="">无</form:option>
<form:options items="${tableList}" itemLabel="nameAndComments" itemValue="name" htmlEscape="false"/>
</form:select>
当前表外键：
<form:select path="parentTableFk" cssClass="input-xlarge">
<form:option value="">无</form:option>
<form:options items="${genTable.columnList}" itemLabel="nameAndComments" itemValue="name" htmlEscape="false"/>
</form:select>
<span class="help-inline">如果有父表，请指定父表表名和外键</span>
</div>
</div>
<div class="control-group hide">
<label class="control-label">备注:</label>
<div class="controls">
<form:textarea path="remarks" htmlEscape="false" rows="4" maxlength="200" class="input-xxlarge"/>
</div>
</div>
<legend>字段列表</legend>
<div class="control-group">
<table id="contentTable" class="table table-striped table-bordered table-condensed">
<thead><tr>
<th title="数据库字段名">列名</th>
<th title="默认读取数据库字段备注">说明</th>
<th title="数据库中设置的字段类型及长度">物理类型</th>
<th title="实体对象的属性字段类型">Java类型</th>
<th title="实体对象的属性字段（对象名.属性名|属性名2|属性名3，例如：用户user.id|name|loginName，属性名2和属性名3为Join时关联查询的字段）">Java属性名称 <i class="icon-question-sign"></i></th>
<th title="是否是数据库主键">主键</th><th title="字段是否可为空值，不可为空字段自动进行空值验证">可空</th><th title="选中后该字段被加入到insert语句里">插入</th>
<th title="选中后该字段被加入到update语句里">编辑</th><th title="选中后该字段被加入到查询列表里">列表</th>
<th title="选中后该字段被加入到查询条件里">查询</th><th title="该字段为查询字段时的查询匹配放松">查询匹配方式</th>
<th title="字段在表单中显示的类型">显示表单类型</th><th title="显示表单类型设置为“下拉框、复选框、点选框”时，需设置字典的类型">字典类型</th><th>排序</th></tr></thead>
<tbody>
<c:forEach items="${genTable.columnList}" var="column" varStatus="vs">
<tr${column.delFlag eq '1'?' class="error" title="已删除的列，保存之后消失！"':''}>
<td nowrap>
<input type="hidden" name="columnList[${vs.index}].id" value="${column.id}"/>
<input type="hidden" name="columnList[${vs.index}].delFlag" value="${column.delFlag}"/>
<input type="hidden" name="columnList[${vs.index}].genTable.id" value="${column.genTable.id}"/>
<input type="hidden" name="columnList[${vs.index}].name" value="${column.name}"/>${column.name}
</td>
<td>
<input type="text" name="columnList[${vs.index}].comments" value="${column.comments}" maxlength="200" class="required" style="width:100px;"/>
</td>
<td nowrap>
<input type="hidden" name="columnList[${vs.index}].jdbcType" value="${column.jdbcType}"/>${column.jdbcType}
</td>
<td>
<select name="columnList[${vs.index}].javaType" class="required input-mini" style="width:85px;*width:75px">
<c:forEach items="${config.javaTypeList}" var="dict">
<option value="${dict.value}" ${dict.value==column.javaType?'selected':''} title="${dict.description}">${dict.label}</option>
</c:forEach>
</select>
</td>
<td>
<input type="text" name="columnList[${vs.index}].javaField" value="${column.javaField}" maxlength="200" class="required input-small"/>
</td>
<td>
<input type="checkbox" name="columnList[${vs.index}].isPk" value="1" ${column.isPk eq '1' ? 'checked' : ''}/>
</td>
<td>
<input type="checkbox" name="columnList[${vs.index}].isNull" value="1" ${column.isNull eq '1' ? 'checked' : ''}/>
</td>
<td>
<input type="checkbox" name="columnList[${vs.index}].isInsert" value="1" ${column.isInsert eq '1' ? 'checked' : ''}/>
</td>
<td>
<input type="checkbox" name="columnList[${vs.index}].isEdit" value="1" ${column.isEdit eq '1' ? 'checked' : ''}/>
</td>
<td>
<input type="checkbox" name="columnList[${vs.index}].isList" value="1" ${column.isList eq '1' ? 'checked' : ''}/>
</td>
<td>
<input type="checkbox" name="columnList[${vs.index}].isQuery" value="1" ${column.isQuery eq '1' ? 'checked' : ''}/>
</td>
<td>
<select name="columnList[${vs.index}].queryType" class="required input-mini">
<c:forEach items="${config.queryTypeList}" var="dict">
<option value="${fns:escapeHtml(dict.value)}" ${fns:escapeHtml(dict.value)==column.queryType?'selected':''} title="${dict.description}">${fns:escapeHtml(dict.label)}</option>
</c:forEach>
</select>
</td>
<td>
<select name="columnList[${vs.index}].showType" class="required" style="width:100px;">
<c:forEach items="${config.showTypeList}" var="dict">
<option value="${dict.value}" ${dict.value==column.showType?'selected':''} title="${dict.description}">${dict.label}</option>
</c:forEach>
</select>
</td>
<td>
<input type="text" name="columnList[${vs.index}].dictType" value="${column.dictType}" maxlength="200" class="input-mini"/>
</td>
<td>
<input type="text" name="columnList[${vs.index}].sort" value="${column.sort}" maxlength="200" class="required input-min digits"/>
</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</fieldset>
<div class="form-actions">
<shiro:hasPermission name="gen:genTable:edit"><input id="btnSubmit" class="btn btn-primary" type="submit" value="保存"/> </shiro:hasPermission>
<input id="btnCancel" class="btn" type="button" value="返回" onclick="history.go(-1)"/>
</div>
</form:form>
</c:otherwise>
</c:choose>
</body>
</html>

注意其中的name属性

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name="columnList[${vs.index}].xxx"

在GenTable中是用list来装的

所以在spring mvc数据绑定的时候可以通过下标的形式来传值

业务表配置好之后，就是生成代码，新建生成方案配置，然后输入一些必须的信息

点击保存并生成代码，会调用GenSchemeController中的save()方法，传入一些参数

然后调用genSchemeService.save()方法进行生成

如果是1的话就生成代码

generateCode方法如下:

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private String generateCode(GenScheme genScheme){
StringBuilder result = new StringBuilder();
// 查询主表及字段列
GenTable genTable = genTableDao.get(genScheme.getGenTable().getId());
genTable.setColumnList(genTableColumnDao.findList(new GenTableColumn(new GenTable(genTable.getId()))));
// 获取所有代码模板
GenConfig config = GenUtils.getConfig();
// 获取模板列表
List<GenTemplate> templateList = GenUtils.getTemplateList(config, genScheme.getCategory(), false); //获取所有不包含childTableTemplateList的数据
List<GenTemplate> childTableTemplateList = GenUtils.getTemplateList(config, genScheme.getCategory(), true);
// 如果有子表模板，则需要获取子表列表
if (childTableTemplateList.size() > 0){
GenTable parentTable = new GenTable();
parentTable.setParentTable(genTable.getName());
genTable.setChildList(genTableDao.findList(parentTable));
}
// 生成子表模板代码
for (GenTable childTable : genTable.getChildList()){
childTable.setParent(genTable);
childTable.setColumnList(genTableColumnDao.findList(new GenTableColumn(new GenTable(childTable.getId()))));
genScheme.setGenTable(childTable);
Map<String, Object> childTableModel = GenUtils.getDataModel(genScheme);
for (GenTemplate tpl : childTableTemplateList){
result.append(GenUtils.generateToFile(tpl, childTableModel, genScheme.getReplaceFile()));
}
}
// 生成主表模板代码
genScheme.setGenTable(genTable);
Map<String, Object> model = GenUtils.getDataModel(genScheme);
for (GenTemplate tpl : templateList){
result.append(GenUtils.generateToFile(tpl, model, genScheme.getReplaceFile()));
}
return result.toString();
}

该方法主要是做一些，获取模板，然后进行数据绑定等一些工作。其中的

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// 获取模板列表
List<GenTemplate> templateList = GenUtils.getTemplateList(config, genScheme.getCategory(), false); //获取所有不包含childTableTemplateList的数据
List<GenTemplate> childTableTemplateList = GenUtils.getTemplateList(config, genScheme.getCategory(), true);

getTemplateList方法为

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/**
* 根据分类获取模板列表
* @param config
* @param category
* @param isChildTable 是否是子表
* @return
*/
public static List<GenTemplate> getTemplateList(GenConfig config, String category, boolean isChildTable){
List<GenTemplate> templateList = Lists.newArrayList();
if (config !=null && config.getCategoryList() != null && category != null){
for (GenCategory e : config.getCategoryList()){
if (category.equals(e.getValue())){
List<String> list = null;
if (!isChildTable){
list = e.getTemplate();
}else{
list = e.getChildTableTemplate();
}
if (list != null){
for (String s : list){
if (StringUtils.startsWith(s, GenCategory.CATEGORY_REF)){
templateList.addAll(getTemplateList(config, StringUtils.replace(s, GenCategory.CATEGORY_REF, ""), false));
}else{
GenTemplate template = fileToObject(s, GenTemplate.class);
if (template != null){
templateList.add(template);
}
}
}
}
break;
}
}
}
return templateList;
}

通过标志位来获取

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if (!isChildTable){
list = e.getTemplate();
}else{
list = e.getChildTableTemplate();
}

主表，子表模板，生成文件的方法是GenUtils.generateToFile(tpl, model, genScheme.getReplaceFile())

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/**
* 生成到文件
* @param tpl
* @param model
* @param isReplaceFile
* @return
*/
public static String generateToFile(GenTemplate tpl, Map<String, Object> model, boolean isReplaceFile){
// 获取生成文件
String fileName = Global.getProjectPath() + File.separator
+ StringUtils.replaceEach(FreeMarkers.renderString(tpl.getFilePath() + "/", model),
new String[]{"//", "/", "."}, new String[]{File.separator, File.separator, File.separator})
+ FreeMarkers.renderString(tpl.getFileName(), model);
logger.debug(" fileName === " + fileName);
// 获取生成文件内容
String content = FreeMarkers.renderString(StringUtils.trimToEmpty(tpl.getContent()), model);
logger.debug(" content === \r\n" + content);
// 如果选择替换文件，则删除原文件
if (isReplaceFile){
FileUtils.deleteFile(fileName);
}
// 创建并写入文件
if (FileUtils.createFile(fileName)){
FileUtils.writeToFile(fileName, content, true);
logger.debug(" file create === " + fileName);
return "生成成功："+fileName+"<br/>";
}else{
logger.debug(" file extents === " + fileName);
return "文件已存在："+fileName+"<br/>";
}
}

生成成功之后，会有如下提示:

JEESITE快速开发平台（七）代码生成原理

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