如何通过freemarker中的键值访问json值？

Question

Is there any way to access a json value by key value in freemarker? The json looks like this:

{"className":"Lorem Ipsum","classPK":"52293","title":"Test Name"}

I need these values to use them in a method:

localService.method(className, classPK);

I was trying to access them directly with ${json.getData()["classPK"]} . How to do it?

Answer 1

You can use by using ${variableName.key} . In Your case <#assign data="Your JSON Goes here"?eval> then after access using ${data.className} .

Here Using ?eval on String data which includes JSON ,we convert it to Freemarker littral.

For more information follow the links:- https://docs.akana.com/ag/processes/process_transform_freemarker.htm https://liferay.dev/blogs/-/blogs/working-with-json-in-freemarker

Answer 2

You can either use ?eval or the jsonFactoryUtil (if available). Examples:

<#assign customFieldJson = customField.getData()?eval />
${customFieldJson.className}
${customFieldJson.classPK}
${customFieldJson.title}

or

<#assign customFieldJson = jsonFactoryUtil.createJSONObject(customField.getData()) />
${customFieldJson.getString("className")}
${customFieldJson.getString("classPK")}
${customFieldJson.getString("title")}

I don't know which one is "better", but i prefer eval...

Answer 3

Assign json into this variable and try to access this way

<#-- Freemarker hash from JSON literal --> <#assign getData= {"className":"Lorem Ipsum","classPK":"52293","title":"Test Name"} >

${getData.className} ${getData.classPK}