設置圖像標記的src屬性中的變量值爲javascript/ajax中的base64編碼圖像

我有一個圖像字節代碼base64編碼，我試圖在javascript/ajax中設置標記的src屬性。設置圖像標記的src屬性中的變量值爲javascript/ajax中的base64編碼圖像

我不想直接設置它，因爲我通過讀取servlet返回的響應並將字節碼轉換爲變量並希望將此變量值設置爲 src屬性，如下所示。

var src3="data:image/jpg;base64,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"; 
document.getElementById("outmessage").innerHTML = "<h2> Image \<img src\= "+src3+" /></h2>";

這不起作用：給了我一個輸出

enter image description here

我可以肯定的是，以base64字節是正確的，因爲我直接添加到測試它的東西img標籤的src元素如下

<img src ="data:image/jpg;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0a 
HBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL/2wBDAQkJCQwLDBgNDRgyIRwhMjIyMjIy 
MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL/wAARCAAUAB0DASIA 
AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA 
AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 
ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm 
p6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA 
AwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSEx 
BhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElK 
U1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3 
uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwDi677T 
fhJr99py3UstraPJGHjgmLbwcjhwB8vy5Pc9AQOccDXs9h8ZdKNjD/aNheLebf3ot0Vo8+qksDg9 
cHp0yeteFho0ZN+1Z+r5zWzClCH1GN9devp9+p5TreiX3h7VJNP1CLZMnIYcrIvZlPcH/EHBBFZ1 
dF408T/8JX4ga+SDyYI4xDCp+8UBJBbtklj06cDnGTztYVFFSajselhJVpUISrq07arzCiiipOgK 
KKKAP//Z"> </img>

我不知道如何在JavaScript中設置此值從一個VA可變結構。有人可以指出如何實現這一點嗎？預先感謝

來源

2012-12-04 rahul pasricha

你有''之間的空間，將其刪除。更好的是，添加引號。更好的是，使用['document.createElement']（https://developer.mozilla.org/en-US/docs/DOM/document.createElement）。 –

刪除空格或添加引號不能解決問題，字符串被截斷，這就是爲什麼你根本沒有圖像。 – VoidMain

@VoidMain http://jsfiddle.net/8wxSs/工作正常，沒有空間和報價？ –

var src3="data:image/jpg;base64,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"; 
document.getElementById("outmessage").innerHTML = "<h2> Image \<img src\= "+src3+" /></h2>";

在瀏覽器（即/火狐等）將上述作品。我通過eclipse運行相同的代碼片段（在tomcat上部署），並在eclipse默認瀏覽器上檢查結果頁面。它沒有顯示圖像。當我在firefox或chrome中運行相同的url時，它顯示圖像。我想一些與Eclipse默認瀏覽器不能顯示圖像的問題

來源

2013-01-11 07:50:52

設置圖像標記的src屬性中的變量值爲javascript/ajax中的base64編碼圖像

回答

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