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本篇內容主要講解“JAVA怎么刪除字符串固定下標字串”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實用性強。下面就讓小編來帶大家學習“JAVA怎么刪除字符串固定下標字串”吧!
當你拿到的報文是這樣的
{
"input": {
"sdfsn": "23u4209350-2",
"fsfs": "128412094",
"sgsgsg": "15821059",
"inssgsuplc_admdfdfdvs": "125125332",
"dgh": "125215312",
"dfgdfg": "215215",
"sdhdsh": "",
"sdfsn": "",
"shdfshdshdsh": "shsdh",
"sdhdsh": "shsh.0",
"shsdhsd": "1",
"shsdh": "1607",
"input": {
"data": {
"dhfsdhsd": "235325",
"shsdhsdh": "03",
"dgd": "BE0445360",
"dfhfdh": "11",
"dshshsd": 76.56,
"ghjrfgj": "01",
"grjf": "234623626",
"hjfd": "236436",
"djfdfgjdfj": "45634",
"exp_Content": "{"gdsg":"01","gjfj":"658568","fjfj":"5675467","ghfjfgkj":"68568","vmgfvj":"658568","gfhjgfyk":"0","fghkfghkg":"5474567"}",
"dfjgdfj": "",
"dfjdfjgdfj": "56745745",
"dfgjdfgjh": 45756758,
"jdfgjhfdgj": 0,
}
}
},
"output": {
"output": {
"r757": {
"dhfsdhsd": "235325",
"shsdhsdh": "03",
"dgd": "BE0445360",
"dfhfdh": "11",
"dshshsd": 76.56,
"ghjrfgj": "01",
"grjf": "234623626",
"hjfd": "236436",
"djfdfgjdfj": "45634",
"exp_content": "",
"dfjgdfj": "",
"dfjdfjgdfj": "56745745",
"dfgjdfgjh": 45756758,
"jdfgjhfdgj": 0,
},
"sdfgsdfg": [
{
"sgasgag": "4673476",
"agasgdas": 5675467,
"asgasgasg": "",
"asdgasgas": 4567456754,
"dhsdsxchsdh": 54675467,
"sdfhsdhsdh": "5674756457"
}
]
},
"erherth": 0,
}
}這一看就知道上邊的報文在postman里邊肯定會報錯，因為exp_Content，因此他又沒有用到，所以你想把他刪掉。其實也沒那么難刪
也就是用到了流轉字符串。字符串固定字符查找，然后進行字符串轉字符流，刪掉字符流中固定字符，之后再轉回來。因為字符串已經是final了所以很多用法都是使用字符串轉字符流實現的
private JSONObject resolveApplicationJson(HttpServletRequest request) {
InputStream is = null;
String json = null;
try {
is = request.getInputStream();
json = IOUtils.toString(is, "UTF-8");
json=json.replaceAll("\\r|\n|\t","");
int index= json.indexOf("exp_Content");
int indexfirst=json.indexOf("{", index);
int indexlast=json.indexOf("}",index);
if (index!=-1 && indexlast !=-1 &&indexfirst !=-1) {
StringBuffer stringBuffer = new StringBuffer(json);
stringBuffer.delete(indexfirst,indexlast+1);
json=stringBuffer.toString();
}
} catch (IOException e) {
throw new RuntimeException("CANNOT get reader from request!", e);
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
try {
return new JSONObject(json);
} catch (JSONException e) {
throw new RuntimeException("CANOT CONVET JSON:[" + json + "] to JSONObject!", e);
}
}當你拿到的報文是這樣的。
{
"input": {
"sdfsn": "23u4209350-2",
"fsfs": "128412094",
"sgsgsg": "15821059",
"inssgsuplc_admdfdfdvs": "125125332",
"dgh": "125215312",
"dfgdfg": "215215",
"sdhdsh": "",
"sdfsn": "",
"shdfshdshdsh": "shsdh",
"sdhdsh": "shsh.0",
"shsdhsd": "1",
"shsdh": "1607",
"input": {
"data": {
"dhfsdhsd": "235325",
"shsdhsdh": "03",
"dgd": "BE0445360",
"dfhfdh": "11",
"dshshsd": 76.56,
"ghjrfgj": "01",
"grjf": "234623626",
"hjfd": "236436",
"djfdfgjdfj": "45634",
"exp_Content": "{"gdsg":"01","gjfj":"658568","fjfj":"5675467","ghfjfgkj":"68568","vmgfvj":"658568","gfhjgfyk":"0","fghkfghkg":"5474567"}",
"dfjgdfj": "",
"dfjdfjgdfj": "56745745",
"dfgjdfgjh": 45756758,
"jdfgjhfdgj": 0,
}
}
},
"output": {
"output": {
"r757": {
"dhfsdhsd": "235325",
"shsdhsdh": "03",
"dgd": "BE0445360",
"exp_Content": "{"gdsg":"01","gjfj":"658568","fjfj":"5675467","ghfjfgkj":"68568","vmgfvj":"658568","gfhjgfyk":"0","fghkfghkg":"5474567"}",
"dfhfdh": "11",
"dshshsd": 76.56,
"ghjrfgj": "01",
"grjf": "234623626",
"hjfd": "236436",
"djfdfgjdfj": "45634",
"exp_content": "{"gdsg":"01","gjfj":"658568","fjfj":"5675467","ghfjfgkj":"68568","vmgfvj":"658568","gfhjgfyk":"0","fghkfghkg":"5474567"}",
"dfjgdfj": "",
"dfjdfjgdfj": "56745745",
"dfgjdfgjh": 45756758,
"jdfgjhfdgj": 0,
},
"sdfgsdfg": [
{
"sgasgag": "4673476",
"agasgdas": 5675467,
"asgasgasg": "",
"asdgasgas": 4567456754,
"dhsdsxchsdh": 54675467,
"sdfhsdhsdh": "5674756457"
}
]
},
"erherth": 0,
}
}解決方式如下：根據需要寫出正則表達式，再使用正則看看有幾個這樣的不需要的符號，然后循環遍歷幾次，之后找到這部分，最后刪除掉。
# 全局變量
private static String REGEX = "exp_[c,C]ontent";
# 方式方法
Pattern p = Pattern.compile(REGEX);
// 獲取 matcher 對象
Matcher m = p.matcher(JSON);
List<Integer> list = new ArrayList();
while(m.find()){
list.add(m.start());
}
int index=0;
int indexfirst=0;
int indexlast=0;
for (int j = 0; j < list.size(); j++) {
index=JSON.indexOf("exp_",indexlast);
indexfirst=JSON.indexOf("{", index);
indexlast=JSON.indexOf("}",index);
StringBuffer stringBuffer =null;
if (indexlast !=-1 &&indexfirst !=-1) {
stringBuffer = new StringBuffer(JSON);
stringBuffer.delete(indexfirst,indexlast+1);
}
JSON=stringBuffer.toString();
}到此，相信大家對“JAVA怎么刪除字符串固定下標字串”有了更深的了解，不妨來實際操作一番吧！這里是億速云網站，更多相關內容可以進入相關頻道進行查詢，關注我們，繼續學習！
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