passing json data from servlet to jsp to js file

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I got this servlet which creates JSON data and I want to pass this data on to a jsp page which is supposed to display the data via the InfoVis toolkit.

servlet.java

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既然无缘

2021-02-10 09:29
You don't have to drop the JSON as a string - it's valid JavaScript syntax:
```
<body onload='init(${jsonString})'>
```
When that's rendered by JSP, the end result — the HTML sent to the browser — will be something like:
```
<body onload='init({"something": "some value", "whatever": "your data looks like"})'>
```
Now the only thing you may want to do is HTML encode the JSON, since you're dropping it as an HTML attribute value:
```
<body onload='init(${fn:escapeXml(jsonString)})'>
```
Then your "init" function can expect a ready-to-use JavaScript object, with no need to call a JSON parser at all.
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梦谈多话

2021-02-10 09:33
The cheap and easy way is to modify the JSP so it outputs this:
```
<script>
var theData = ${jsonString};
</script>
<body onload="init(theData);">
```
The downside to that is that it creates a global variable, but if you're calling init in that way, init is already a global, so that ship has sailed. :-)
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