data_validation.groovy

def rules = [
        [
                "expression": ' v_name != null && v_name.length()>0  ',
                "tip"       : "姓名必填"
        ],
        [
                "target"    : ['v_password', 'v_password_twice'],
                "expression": ' v_password == v_password_twice  ',
                "tip"       : "两次密码必须一致"
        ]
]


def map = [
        "v_name"          : '',
        "v_password"      : "abc",
        "v_password_twice": "abc",
]

def check(List rules, def map) {
    def sharedData = new Binding()
    def shell = new GroovyShell(sharedData)
    sharedData.setProperty("length", { s ->
        if (s == null) return 0
        return s.length()
    })
    map.each { k, v ->
        sharedData.setProperty(k, v)
    }

    rules.findAll { !shell.evaluate(it.expression) }
}


check(rules, map).each {
    println(it.tip)
}

sharedData.setProperty("length", { s ->
if (s == null) return 0
return s.length()
})
map.each { k, v ->
sharedData.setProperty(k, v)
}
这一步没看懂

@xrwang8 你好

map.each { k, v ->
    sharedData.setProperty(k, v)
}

这段的意思是把map里的数据，塞到一个沙盒里，这样沙盒在运行rules里吗的expression 时，才能认识map里面的数据

sharedData.setProperty("length", { s ->
    if (s == null) return 0
    return s.length()
})

这个是举个例子，除了往沙盒里面放数据（比如map的数据放进去了），还可以往沙盒里面塞方法。塞的方法，可以在expression里面这样用：

def rules = [
        [
                "expression": ' v_name != null && length(v_name)>0  ',
                "tip"       : "姓名必填"
        ]
]