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博客园 - 页面载入出错

Grails指南摘要-402-logging Grails指南摘要-401-Controller中设置默认Action Grails指南摘要-307-测试领域类 Grails指南摘要-306-嵌入式对象 Grails指南摘要-305-扩展和继承 Grails指南摘要-304-对象关系 Grails指南摘要-303-自定义对象映射 Grails指南摘要-302-瞬时属性 Grails指南摘要-301-属性验证 20130527-jQuery in actin-看代码说事-ch01 20130518-Grails In Action-5、控制应用程序流(04小节) 20130518-Grails In Action-5、控制应用程序流(03小节) 20130517-Grails In Action-5、控制应用程序流(02小节) 20130517-Grails In Action-5、控制应用程序流(01小节) 20130517-Grails In Action-4、让模型工作(06小节) 20130516-Grails In Action-4、让模型工作(05小节) 20130516-Grails In Action-4、让模型工作(04小节) 20130516-Grails In Action-4、让模型工作(03小节) 20130516-Grails In Action-4、让模型工作(02小节)
Grails指南摘要-403-生命周期
页面载入出错 · 2013-06-04 · via 博客园 - 页面载入出错

1.理解Flash Scope

// 存储一个消息在flash范围
fash.message = 'I am available next time you request me!'

当这个消息被下一个消息覆盖时就自动销毁

2.访问请求参数

def userName = request.getParameter('userName')
log.info("User Name: ${userName}")

简单写法

def userName = params.userName
log.info("User Name: ${userName}")

3.请求参数的类型转换

def index() {
    // since params.counter is a string, it must be converted to an int if
    // the application intends to use the value as a number
    def counter = params.counter.toInteger()
    //
}

使用int类型转换

def index() {
    def counter = params.int('counter')
    //
}

使用list类型转换

def index() {
    for (name in params.list('name') {
        // do something with name
    }
}