我使用的数据库为MySQL5，其中存在一个名为legacy_dev的schema，legacy_dev中有一张表叫user：
1，创建Grails应用程序，我将它命名为legacy：grails create-app legacy
2，创建一个域类User：grails create-domain-class User
3，修改grails-app\domain\User.groovy的内容，如下所示：
class User { String userId String password static constraints = { userId(blank: false , maxSize: 16 ) password(blank: false , maxSize: 45 ) } }
4，生成与域类User相关的所有Grails应用程序工件(artifact)：grails generate-all User
5，将grails-app\conf\DevelopmentDataSource.groovy的内容改为：
class DevelopmentDataSource { boolean pooling = true // 将这行注释掉 // String dbCreate = 'update' // one of 'create', 'create-drop','update' // url和driver要正确 String url = " jdbc:mysql://localhost:3306/legacy_dev " String driverClassName = " com.mysql.jdbc.Driver " String username = " root " String password = "" // 这里为您的密码 :) }
6，自行配置Hibernate：
hibernate.cfg.xml
<? xml version='1.0' encoding='UTF-8' ?> <! DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" > < hibernate-configuration > < session-factory > < property name ="connection.driver_class" > com.mysql.jdbc.Driver</ property > < property name ="connection.url" > jdbc:mysql://localhost:3306/legacy_dev</ property > < property name ="connection.username" > root </ property > < property name ="connection.password" ></ property > < property name ="connection.pool_size" > 1 </ property > < property name ="dialect" > org.hibernate.dialect.MySQLDialect </ property > < property name ="current_session_context_class" > thread </ property > < property name ="cache.provider_class" > org.hibernate.cache.NoCacheProvider </ property > < property name ="show_sql" > true </ property > < property name ="hbm2ddl.auto" > validate </ property > < mapping resource ="User.hbm.xml" /> </ session-factory > </ hibernate-configuration >
User.hbm.xml
<? xml version="1.0" ?> <! DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" > < hibernate-mapping > < class name ="User" table ="user" > < id name ="userId" column ="user_id" type ="java.lang.String" length ="16" > <generator class="assigned" /> </id> <property name="password" column="password" type="java.lang.String" length="45" /> </class> </hibernate-mapping>
最后，别忘了修改grails-app\controllers\UserController.groovy以及各GSP的代码
(试验代码时，请不要在Edit User页面中更新用户的userId，否则出发生异常，因为‘主键’不可更改。
在自己的应用程序中，可以disable掉Edit User页面中的User Id文本域)
UserController.groovy
class UserController { def index = { redirect(action:list,params:params) } // the delete, save and update actions only // accept POST requests def allowedMethods = [delete: ' POST ' , save: ' POST ' , update: ' POST ' ] def list = { if ( ! params.max)params.max = 10 [ userList: User.list( params ) ] } def show = { // [ user : User.get( params.id ) ] [ user : User.findByUserId(params.id) ] } def delete = { // def user = User.get( params.id ) def user = User.findByUserId(params.id) if (user) { user.delete() flash.message = " User ${params.id} deleted. " redirect(action:list) } else { flash.message = " User not found with id ${params.id} " redirect(action:list) } } def edit = { // def user = User.get( params.id ) def user = User.findByUserId(params.id) if ( ! user) { flash.message = " User not found with id ${params.id} " redirect(action:list) } else { return [ user : user ] } } def update = { // def user = User.get( params.id ) def user = User.findByUserId(params.id) if (user) { user.properties = params if (user.save()) { // redirect(action:show,id:user.id) redirect(action:show,id:user.userId) } else { render(view: ' edit ' ,model:[user:user]) } } else { flash.message = " User not found with id ${params.id} " redirect(action:edit,id:params.id) } } def create = { def user = new User() user.properties = params return [ ' user ' :user] } def save = { def user = new User() user.properties = params if (user.save()) { // redirect(action:show,id:user.id) redirect(action:show,id:user.userId) } else { render(view: ' create ' ,model:[user:user]) } } }
grails-app\views\user\list.gsp
< html > < head > < meta http-equiv ="Content-Type" content ="text/html; charset=UTF-8" /> < meta name ="layout" content ="main" /> < title > User List </ title > </ head > < body > < div class ="nav" > < span class ="menuButton" >< a href ="${createLinkTo(dir:'')}" >Home </ a ></ span > < span class ="menuButton" >< g:link action ="create" >New User </ g:link ></ span > </ div > < div class ="body" > < h1 > User List </ h1 > < g:if test ="${flash.message}" > < div class ="message" > ${flash.message} </ div > </ g:if > < table > < thead > < tr > <!-- <g:sortableColumn property="id" title="Id" /> --> < g:sortableColumn property ="userId" title ="User Id" /> < g:sortableColumn property ="password" title ="Password" /> < th ></ th > </ tr > </ thead > < tbody > < g:each in ="${userList}" > < tr > <!-- <td>${it.id?.encodeAsHTML()}</td> --> < td > ${it.userId?.encodeAsHTML()} </ td > < td > ${it.password?.encodeAsHTML()} </ td > < td class ="actionButtons" > <!-- <span class="actionButton"><g:link action="show"id="${it.id}">Show</g:link></span> --> < span class ="actionButton" >< g:link action ="show"id ="${it.userId}" > Show </ g:link ></ span > </ td > </ tr > </ g:each > </ tbody > </ table > < div class ="paginateButtons" > < g:paginate total ="${User.count()}" /> </ div > </ div > </ body > </ html >
grails-app\views\user\show.gsp
< html > < head > < meta http-equiv ="Content-Type" content ="text/html; charset=UTF-8" /> < meta name ="layout" content ="main" /> < title > Show User </ title > </ head > < body > < div class ="nav" > < span class ="menuButton" >< a href ="${createLinkTo(dir:'')}" >Home </ a ></ span > < span class ="menuButton" >< g:link action ="list" > User List</ g:link ></ span > < span class ="menuButton" >< g:link action ="create" > New User</ g:link ></ span > </ div > < div class ="body" > < h1 > Show User </ h1 > < g:if test ="${flash.message}" > < div class ="message" > ${flash.message} </ div > </ g:if > < div class ="dialog" > < table > < tbody > <!-- <tr class="prop"> <td valign="top" class="name">Id:</td> <td valign="top" class="value">${user.id}</td> </tr> --> < tr class ="prop" > < td valign ="top" class ="name" > User Id: </ td > < td valign ="top" class ="value" > ${user.userId}</ td > </ tr > < tr class ="prop" > < td valign ="top" class ="name" > Password: </ td > < td valign ="top" class ="value" > ${user.password}</ td > </ tr > </ tbody > </ table > </ div > < div class ="buttons" > < g:form controller ="user" > <!-- <input type="hidden" name="id" value="${user?.id}" /> --> < input type ="hidden" name ="id" value ="${user?.userId}" /> < span class ="button" >< g:actionSubmit value ="Edit" /></ span > < span class ="button" >< g:actionSubmit value ="Delete" /></ span > </ g:form > </ div > </ div > </ body > </ html >
grails-app\views\user\create.gsp
< html > < head > < meta http-equiv ="Content-Type" content ="text/html; charset=UTF-8" /> < meta name ="layout" content ="main" /> < title > Create User </ title > </ head > < body > < div class ="nav" > < span class ="menuButton" >< a href ="${createLinkTo(dir:'')}" >Home </ a ></ span > < span class ="menuButton" >< g:link action ="list" > User List</ g:link ></ span > </ div > < div class ="body" > < h1 > Create User </ h1 > < g:if test ="${flash.message}" > < div class ="message" > ${flash.message} </ div > </ g:if > < g:hasErrors bean ="${user}" > < div class ="errors" > < g:renderErrors bean ="${user}" as ="list" /> </ div > </ g:hasErrors > < g:form action ="save" method ="post" > < div class ="dialog" > < table > < tbody > < tr class ='prop' >< td valign ='top'class ='name' >< label for ='userId' > User Id: </ label ></ td >< td valign ='top' class ='value ${hasErrors(bean:user,field:'userId','errors')}' >< input type ="text" name ='userId' value ="${user?.userId?.encodeAsHTML()}" /></ td ></ tr > < tr class ='prop' >< td valign ='top' class ='name' >< label for ='password' > Password:</ label ></ td >< td valign ='top' class ='value ${hasErrors(bean:user,field:'password','errors')}' >< input type ="text" name ='password'value ="${user?.password?.encodeAsHTML()}" /></ td ></ tr > </ tbody > </ table > </ div > < div class ="buttons" > < span class ="formButton" > < input type ="submit" value ="Create" ></ input > </ span > </ div > </ g:form > </ div > </ body > </ html >
grails-app\views\user\edit.gsp
< html > < head > < meta http-equiv ="Content-Type" content ="text/html; charset=UTF-8" /> < meta name ="layout" content ="main" /> < title > Edit User </ title > </ head > < body > < div class ="nav" > < span class ="menuButton" >< a href ="${createLinkTo(dir:'')}" >Home </ a ></ span > < span class ="menuButton" >< g:link action ="list" >User List </ g:link ></ span > < span class ="menuButton" >< g:link action ="create" >New User </ g:link ></ span > </ div > < div class ="body" > < h1 > Edit User </ h1 > < g:if test ="${flash.message}" > < div class ="message" > ${flash.message} </ div > </ g:if > < g:hasErrors bean ="${user}" > < div class ="errors" > < g:renderErrors bean ="${user}" as ="list" /> </ div > </ g:hasErrors > <!-- <div class="prop"> <span class="name">Id:</span> <span class="value">${user?.id}</span> </div> --> < g:form controller ="user" method ="post" > <!-- <input type="hidden" name="id" value="${user?.id}" /> --> < input type ="hidden" name ="id" value ="${user?.userId}" /> < div class ="dialog" > < table > < tbody > < tr class ='prop' >< td valign ='top' class ='name' >< label for ='userId' > User Id: </ label ></ td >< td valign ='top' class ='value ${hasErrors(bean:user,field:'userId','errors')}' >< input type ="text" name ='userId' value ="${user?.userId?.encodeAsHTML()}" /></ td ></ tr > < tr class ='prop' >< td valign ='top' class ='name' >< label for ='password' > Password: </ label ></ td >< td valign ='top' class ='value ${hasErrors(bean:user,field:'password','errors')}' >< input type ="text" name ='password' value ="${user?.password?.encodeAsHTML()}" /></ td ></ tr > </ tbody > </ table > </ div > < div class ="buttons" > < span class ="button" >< g:actionSubmit value ="Update" /></ span > < span class ="button" >< g:actionSubmit value ="Delete" /></ span > </ div > </ g:form > </ div > </ body > </ html >
好了，整个处理过程已经呈现给大家了，希望对大家有用 :)
