1.在js中url 定义如下：

encodeURIComponent(encodeURIComponent(searchTxt)))进行 编码

var searchTxt = "搜索内容";
var url = ""+encodeURIComponent(encodeURIComponent(searchTxt)));
 

2. java 中解码( java.net.URLDecoder.decode)

 String name = context.getParas().get("name")!=null?context.getParas().get("name"):"";
 try {
		 name = java.net.URLDecoder.decode(name, "UTF-8");
	} catch (Exception e) {
			e.printStackTrace();
	}