# json转化 **一、JSON字符串转换为JSON对象** ``` <pre class="calibre10">``` var obj <span class="token1">=</span> <span class="token4">eval</span><span class="token3">(</span><span class="token2">'('</span> <span class="token1">+</span> str <span class="token1">+</span> <span class="token2">')'</span><span class="token3">)</span><span class="token3">;</span><span class="token">//由JSON字符串转换为JSON对象</span> <span class="token">//或者</span> var obj <span class="token1">=</span> str<span class="token3">.</span><span class="token4">parseJSON</span><span class="token3">(</span><span class="token3">)</span><span class="token3">;</span> <span class="token">//由JSON字符串转换为JSON对象</span> <span class="token">//或者</span> var obj <span class="token1">=</span> JSON<span class="token3">.</span><span class="token4">parse</span><span class="token3">(</span>str<span class="token3">)</span><span class="token3">;</span> <span class="token">//由JSON字符串转换为JSON对象</span> <span class="token">//或者</span> var obj <span class="token1">=</span> $<span class="token3">.</span><span class="token4">parseJSON</span><span class="token3">(</span>str<span class="token3">)</span><span class="token3">;</span> <span class="token">//由jquery将JSON字符串转换为JSON对象</span> ``` ``` **二、将JSON对象转化为JSON字符串** ``` <pre class="calibre17">``` var last<span class="token1">=</span>obj<span class="token3">.</span><span class="token4">toJSONString</span><span class="token3">(</span><span class="token3">)</span><span class="token3">;</span> <span class="token">//将JSON对象转化为JSON字符</span> <span class="token">//或者</span> var last<span class="token1">=</span>JSON<span class="token3">.</span><span class="token4">stringify</span><span class="token3">(</span>obj<span class="token3">)</span><span class="token3">;</span> <span class="token">//将JSON对象转化为JSON字符</span> ``` ```