Java 从网络中读取图片 转换成Base64字符串

[{"title":"（ 12 个子文件 3.08MB ） Java 从网络中读取图片 转换成Base64字符串","children":[{"title":"ReaderPricture","children":[{"title":"135.png <span style='color:#111;'> 135.00KB </span>","children":null,"spread":false},{"title":"bin","children":[{"title":"com","children":[{"title":"readerpicture","children":[{"title":"Test.class <span style='color:#111;'> 1.29KB </span>","children":null,"spread":false},{"title":"Controller.class <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true},{"title":"35KB图片.png <span style='color:#111;'> 35.71KB </span>","children":null,"spread":false},{"title":".settings","children":[{"title":"org.eclipse.jdt.core.prefs <span style='color:#111;'> 629B </span>","children":null,"spread":false}],"spread":true},{"title":"src","children":[{"title":"com","children":[{"title":"readerpicture","children":[{"title":"Controller.java <span style='color:#111;'> 3.12KB </span>","children":null,"spread":false},{"title":"Test.java <span style='color:#111;'> 1.32KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true},{"title":".project <span style='color:#111;'> 390B </span>","children":null,"spread":false},{"title":"3M图片.JPG <span style='color:#111;'> 2.88MB </span>","children":null,"spread":false},{"title":".classpath <span style='color:#111;'> 426B </span>","children":null,"spread":false},{"title":"lib","children":[{"title":"sun.misc.BASE64Decoder.jar <span style='color:#111;'> 7.30KB </span>","children":null,"spread":false},{"title":"commons-codec-1.5.jar <span style='color:#111;'> 71.38KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}]