blocks|key|42270|text|看，如果你想把它从servlet传递到jsp，你不需要创建request+(+ajax+)，因为servlet和jsp都存在于服务器side.You上，只需将json数组设置为请求属性或会话属性，并将其放入jsp并显示(使用循环)。不需要ajax。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|42271|如果您需要通过同步调用来获取数据：|42272|在servlet中|42273|+++PrintWriter+out+=+response.getWriter();
+++out.println(htags);|code-block|syntax|javascript|42274|我不会把另一个完整的例子搞得一团糟，请看这篇文章：How+to+send+JSON+array+from+server+to+client,+i.e.+(java+to+AJAX/Javascript)?|42275|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/7083951/how-to-send-json-array-from-server-to-client-i-e-java-to-ajax-javascript^0|T|7|1K|3|0|0|0|0|P|25|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|13|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|14|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|15|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|16|8|@]|D|@$9|17|A|18|1|19]]|E|$]]|$1|Q|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

See, if you want to pass that from servlet to jsp you need not to make a <code>request</code> (ajax), since servlet and <code>jsp</code> both exists at server side.You just set that json array as a request attribute or session attribute and get it in jsp and display(with loop).NO need of ajax there.

If You need to fetch the data with synchronous call:

In servlet 

<pre><code> PrintWriter out = response.getWriter();
 out.println(htags);
</code></pre>

I won't clutter SO with another full example,see this SO post:<a href="https://stackoverflow.com/questions/7083951/how-to-send-json-array-from-server-to-client-i-e-java-to-ajax-javascript">How to send JSON array from server to client, i.e. (java to AJAX/Javascript)?</a>

blocks|key|2726227|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2726228|servlet代码|2726229|JSONArray++htags+=+new+JSONArray();
++++++++htags.add("#abc");
++++++++htags.add("#xyz");
++++++++htags.add("#emc");
++++++++htags.add("#netapp");


++++++++//top+trends
++++++++JSONArray+trends+=+new+JSONArray();
++++++++trends.add("pass");
++++++++trends.add("horiz");
++++++++trends.add("software");
++++++++trends.add("banana");
response.setContentType("application/json");+
response.setCharacterEncoding("utf-8");+
String+jsons+=+"["%2Bhtags%2B","%2Btrends%2B"]";+//Put+both+objects+in+an+array+of+2+elements
out.print(jsons);|code-block|syntax|javascript|2726230|在你的jsp页面上|2726231|$.ajax({

++++++++++++url+:+"SerlvetToJsp",
++++++++++++dataType+:+'json',
++++++++++++contentType:"application/json",
++++++++++++error+:+function()+{

++++++++++++++++alert("Error");
++++++++++++},
++++++++++++success+:+function(data)+{
++++++++++++++++var+data1=data[0],
++++++++++++++++var+data2=data[2],
+++++++++++++++alert(data1[0]);

++++++++++++}
++++});|2726232|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Try this

<h2>servlet code</h2>

<pre><code>JSONArray htags = new JSONArray();
 htags.add("#abc");
 htags.add("#xyz");
 htags.add("#emc");
 htags.add("#netapp");


 //top trends
 JSONArray trends = new JSONArray();
 trends.add("pass");
 trends.add("horiz");
 trends.add("software");
 trends.add("banana");
response.setContentType("application/json"); 
response.setCharacterEncoding("utf-8"); 
String jsons = "["+htags+","+trends+"]"; //Put both objects in an array of 2 elements
out.print(jsons);
</code></pre>

and on you jsp page

<pre><code>$.ajax({

 url : "SerlvetToJsp",
 dataType : 'json',
 contentType:"application/json",
 error : function() {

 alert("Error");
 },
 success : function(data) {
 var data1=data[0],
 var data2=data[2],
 alert(data1[0]);

 }
 });
</code></pre>

blocks|key|2516631|text|Servlet可以使用它将json数组或json对象发送到客户端。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2516632|JSONArray+jsonArray+=+[{:},+{:}];

response.getWriter.write(jsonArray.toString());|code-block|syntax|javascript|2516633|在JSP页面中，此方法调用请求JSON到Servlet，并使用匿名函数(JSON.parse用于将字符串转换为json对象或json数组)方法捕获json数组或json对象。|2516634|$("button").click(function(){
++$.get("ServletToJSP",function(data,status){
++++alert("Data:+"+%2B+JSON.parse(data)+%2B+"\nStatus:+"+%2B+status);
++});
});|2516635|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Servlet can use this to send json array or json object to client.

<pre><code>JSONArray jsonArray = [{:}, {:}];

response.getWriter.write(jsonArray.toString());
</code></pre>

In JSP page, this method call the request JSON to Servlet and catch the json array or json object with annonymous function(JSON.parse is used to convert string to json object or json array) method.

<pre><code>$("button").click(function(){
 $.get("ServletToJSP",function(data,status){
 alert("Data: " + JSON.parse(data) + "\nStatus: " + status);
 });
});
</code></pre>

blocks|key|42679|text|在servlet中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42680|String+uri+=+request.getRequestURI();
++++++++if+(uri.equalsIgnoreCase(uri))+{
++++++++++++++++++++response.setContentType("application/json");
++++++++++++++++++++/*+++get+the+json+array++++++*/
++++++++++++++++++++response.getWriter().write(array.toJSONString());
++++++++++++++++}|code-block|syntax|javascript|42681|jquery：|42682|++++$('#buttonid').on('click',+function()+{
+++++++++++var+url="your+url";
++++++++$.ajax({
++++++++++++++++type+:+'POST',
++++++++++++++++url+:+url,
++++++++++++++++data+:+null,
++++++++++++++++error+:+function(xhr,+status,+error)+{
++++++++++++++++++++alert("error");
++++++++++++++++},
++++++++++++++++success+:+function(data)+{
++++++++++++++++++++alert("success");
++++++++++++++++++++$.each(data,+function(key,+val)+{
++++++++++++++++++++console.log(val);
++++++++++++++++}
++++++++++++});
++++});|42683|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

in servlet:

<pre><code>String uri = request.getRequestURI();
 if (uri.equalsIgnoreCase(uri)) {
 response.setContentType("application/json");
 /* get the json array */
 response.getWriter().write(array.toJSONString());
 }
</code></pre>

jquery:

<pre><code> $('#buttonid').on('click', function() {
 var url="your url";
 $.ajax({
 type : 'POST',
 url : url,
 data : null,
 error : function(xhr, status, error) {
 alert("error");
 },
 success : function(data) {
 alert("success");
 $.each(data, function(key, val) {
 console.log(val);
 }
 });
 });
</code></pre>

I have to json array in my servlet.

I want to fetch json array value and print in to jsp page using ajax.

below is code

<pre><code>JSONArray htags = new JSONArray();
 htags.add("#abc");
 htags.add("#xyz");
 htags.add("#emc");
 htags.add("#netapp");


 //top trends
 JSONArray trends = new JSONArray();
 trends.add("pass");
 trends.add("horiz");
 trends.add("software");
 trends.add("banana");
</code></pre>

jsp

I got error msg here.

<pre><code>$.ajax({

 url : "SerlvetToJsp",
 dataType : 'json',
 error : function() {

 alert("Error");
 },
 success : function(data) {
 alert(data);

 }
 });
</code></pre>

get json array from servlet using ajax

服务器

JSON

我必须在我的servlet中使用json数组。我想获取json数组值并使用ajax打印到jsp页面。下面是代码JSONArray  htags = new JSONArray();        htags.add("#abc");        htags.add("#xyz");        htags.add(...

问使用ajax从servlet获取json数组
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