java - Jackson JSON ObjectMapper.readvalue -



java - Jackson JSON ObjectMapper.readvalue -

i'm going through code examples on converting java object json , came across this:

hashmap<string, object> filters = new objectmapper().readvalue(filterstr, hashmap.class);

where

string filterstr;

sorry, above line of code doing? went through other illustration here. can see readvalue() has been overridden how can string converted hashmap? shouldn't json object , not string? thanks.

objectmapper().readvalue()

is overloaded several types of conversions.

if filterstr compatible converted hashmap method it.

e.g. filterstr = "{\"name\":\"tom\", \"age\":\"25\"}"; give map key-value pairs {age=25, name=tom}

java json jackson

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