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>"}}----------------------------------------
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>"}}----------------------------------------
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(/\n/g,"").replace(/\r/g,"");//去掉字符串中的换行符
json = json.replace(/\n/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>\n\n<span> ?????????????????spare</span>\n\n</p>","B":"<p>\n\n<span>fast </span>\n\n</p>","C":"<p>\n\n<span> ?????????????moderate</span>\n\n</p>","D":"<p>\n\n<span>moral</span>\n\n</p>"}}‘; json = json.replace(/\n/g,"").replace(/\r/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>[js] 处理字符串换行造成的json解析失败
原文地址：https://www.cnblogs.com/avivaye/p/9298265.html