如何在Groovy中将String转换为GString并替换占位符?

问题描述

我想从数据库中读取一个字符串，并通过将其转换为GString来替换占位符.我可以用Eval做到这一点吗?还有其他想法吗?

I want to read a String from database and replace the placeholder by converting it to a GString. Can I do this with Eval? Any other ideas?

String stringFromDatabase = 'Hello ${name}!'
String name = 'world'

assert 'Hello world!'== TODO

推荐答案

您可以在Groovy中使用Template框架，因此可以解决您的问题:

You can use the Template framework in Groovy, so doing this solves your problem:

String stringFromDatabase = 'Hello ${name}!'
String name = 'world'

def engine = new groovy.text.SimpleTemplateEngine()
assert 'Hello world!'== engine.createTemplate(stringFromDatabase).make([name:name]).toString()

您可以在此处找到文档: http://docs.groovy-lang.org/latest/html/documentation/template-engines.html#_introduction

You can find the docs here: http://docs.groovy-lang.org/latest/html/documentation/template-engines.html#_introduction

GString类是抽象的，抽象类的GStringImpl实现对字符串数组起作用，该字符串数组是从解析阶段与值一起获得的.

The GString class is abstract, and the GStringImpl implementation of the abstract class works on the arrays of strings, that it gets from the parsing phase along with values.

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