what is json in java and how to access them
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8/10/2019 What is Json in Java and How to access them
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Json with Java
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Json "onvertin! JSON te+t to somethin! in JavaScript will ta#es
one line of code by usin! eval - function , to create an
object from JSON te+t, just pass the strin! to eval - function
after surroundin! the te+t with parentheses that.s it$
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JSON Object /rom JSON te+t JSON Object:
var names 0 121nameslist13 [1java1,1php1,4dotnet1]516
7he variable names will hold the JSON te+t
8hole JSON te+t must be surrounded by 9uotes
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:ariable names- ;nto JS object %ctually we can convert JSON te+t into JavaScript object
with eval function$ eval- $
eval function$ eval- is the JavaScript function which
converts JSON te+t into an JavaScript object$
/or )+ample3
var jsObject = eval("(" + names + ")");
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%ccess JSON Object var arr<name 0 jsObject[1nameslist1]6
arr<name[=] will prints > java
arr<name[?] will prints > php
arr<name[@] will prints A dotnet Note3 ;nde+ always start from Bero
;nstead of usin! eval- function ;t is safer to use
a JSON parser to convert a JSON te+t to a JS object$
% JSON parser will reco!niBe only JSON te+t and will
not compile scripts$
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JSON te+t to JS Object JSON arrays are written inside s9uare brac#ets
%rray can contain any number of objects
/or )+ample3
21names13 ['C'21name1 3 4Shashi1, 1address1 3 4Datna1, 1a!e1 3 @E5,'C'21name1 3
4Famlesh1, 1address1 3 4elhi1, 1a!e1 3 @G5'C']5
Here names is an array containin! @ objects$ Iy
usin! JavaScript synta+ we can access the values withthe help of 4$ operator,
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JSON te+t to JS Object )+ample3
<script language="javascript" >
var JsnObjectte!t = 21names13 ['C'21name1 3 4Shashi1, 1address1 3 4Datna1, 1a!e1 3
@E5,'C'21name1 3 4Famlesh1, 1address1 3 4elhi1, 1a!e1 3 @G5'C']5
var JsnObjectName = eval ("(" + JsnObjectte!t + ")");
cument#$rite("<%nt clr=&'*ee& si,e=&-& %ace=&verana&>Name . <%nt
clr=&'///&>" +JsnObjectName#names0/1#name+"<2%nt><2%nt> 33 ");
cument#$rite("<%nt clr=&'*ee& si,e=&-& %ace=&verana&>4ge# . <%nt
clr=&'///&>" +JsnObjectName#names0/1#age+"<2%nt><2%nt> 33 ");
cument#$rite("<%nt clr=&'*ee& si,e=&-& %ace=&verana&>name . <%nt
clr=&'///&>" +JsnObjectName#names01#name+"<2%nt><2%nt> 33 ");
cument#$rite("<%nt clr=&'*ee& si,e=&-& %ace=&verana&>name . <%nt
clr=&'///&>" +JsnObjectName#names01#age+"<2%nt><2%nt>");
<2script>
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Ke9uirement to use Json in javaJars re9uired3
?- json>lib>@$@$@>jd#?L$jar
@- eBmorph$jar
M- commons>lan!$jar
- commons>lo!!in!$jar
L- commons>beanutils$jar
E- commons>collections$jar
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Json in javaimport net$sf$json$JSONObject6
public class Json)+ 2
public static vi mainString ar!s[]- 2
JSONObject jo0new JSONObject-6
jo$put4company1,4ape+ t!i1-6
jo$put4address1,4)>@=,Sec>EM,Noida1-6
jo$put4state1,D-6 System$out$printlnjo-6
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