如何在JSP页面中显示Pretty Print JSON String

Question

我想在JSP页面中显示JSON字符串.我正在使用Spring MVC框架.下面是代码

String result = restTemplate.getForObject(url.toString(), String.class);

ObjectMapper mapper = new ObjectMapper();
Object json = mapper.readValue(result, Object.class);

String indented = mapper.defaultPrettyPrintingWriter().writeValueAsString(json);

System.out.println(indented);//This print statement show correct way I need

model.addAttribute("response", (indented));

这条线System.out.println(indented);打印出类似这样的东西 -

{
  "attributes" : [ {
    "nm" : "ACCOUNT",
    "error" : "null SYS00019CancellationException in CoreImpl fetchAttributes\n java.util.concurrent.CancellationException\n\tat java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:231)\n\tat java.util.concurrent.FutureTask.",
    "status" : "ERROR"
  } ]
}

这是我需要使用JSP页面显示的方式.但是当我把它添加到这样的模型时 -

model.addAttribute("response", (indented));

然后在resultform.jsp页面中显示出来,如下所示 -

    <fieldset>
        <legend>Response:</legend>
            <strong>${response}</strong><br />

    </fieldset>

我在浏览器上得到这样的东西 -

{ "attributes" : [ { "nm" : "ACCOUNT", "error" : "null    
SYS00019CancellationException in CoreImpl fetchAttributes\n 
java.util.concurrent.CancellationException\n\tat 
java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:231)\n\tat 
java.util.concurrent.FutureTask.", "status" : "ERROR" } ] }

我不需要.我不知道为什么会这样包裹？我需要它打印出来的方式就像这样.

{
  "attributes" : [ {
    "nm" : "ACCOUNT",
    "error" : "null SYS00019CancellationException in CoreImpl fetchAttributes\n java.util.concurrent.CancellationException\n\tat java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:231)\n\tat java.util.concurrent.FutureTask.",
    "status" : "ERROR"
  } ]
}

谁能告诉我为什么会这样发生？我怎样才能以我需要的方式在JSP页面中显示它？

Answer 1

空格字符通常在HTML中折叠(默认情况下).这些字符包括换行符.将JSON转储为<pre>.

<pre>
${response}
</pre>

其他解决方案:https://stackoverflow.com/a/10474709/139010