需求：从数据库某个字段取出字符串出来，转为json，结果发现报错为 解析失败，发现是因为取出的字符串换行导致，现在需要将字符串里面的换行替换为''，使字符串可依成功解析成json对象。
技术：依靠replace函数实现
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数据库里面的
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{"choiceList":{"A":"<p>
<span>spare</span>
</p>","B":"<p>
<span>fast </span>
</p>","C":"<p>
<span>moderate</span>
</p>","D":"<p>
<span>moral</span>
</p>"}}
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去掉多余空格后的样子
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{"choiceList":{"A":"<p><span>spare</span></p>","B":"<p><span>fast </span></p>","C":"<p><span>moderate</span></p>","D":"<p><span>moral</span></p>"}}
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最后的解析成功的
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{ "choiceList": { "A": "<p><span>spare</span></p>", "B": "<p><span>fast </span></p>", "C": "<p><span>moderate</span></p>", "D": "<p><span>moral</span></p>" } }
关键代码：
var json=异常字符串
json = json.replace(/
/g,"").replace(/
/g,"");//去掉字符串中的换行符
json = json.replace(/
/g,"").replace(/s|xA0/g,"");//去掉字符串中的所有空格
var jsonObj= eval('(' + json + ')'); //将字符串解析成json对象
console.log(jsonObj);
测试：
http://www.w3school.com.cn/tiy/t.asp?f=jquery_hide <!DOCTYPE html> <html> <head> <script src="/jquery/jquery-1.11.1.min.js"> </script> <script> $(document).ready(function(){ var json='{"choiceList": {"A2":"<p> <span> spare</span> </p>","B":"<p> <span>fast </span> </p>","C":"<p> <span> moderate</span> </p>","D":"<p> <span>moral</span> </p>"}}'; json = json.replace(/ /g,"").replace(/ /g,"").replace(/s|xA0/g,""); var jsonObj= eval('(' + json + ')'); console.log(jsonObj); }); </script> </head> <body> <p>请在console控制台看结果</p> </body> </html>