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A, spring EL expression:

　　Variables: variables can be used in the expression syntax # 'variable name' references
　　ExpressionParser EP = new new SpelExpressionParser ();
　　// create a context variable
　　EvaluationContext ctx = new new StandardEvaluationContext ();
　　ctx.setVariable ( "name", "the Hello");

　　Expression expression = ep.parseExpression("#name")

　　System.out.println(expression .getValue(ctx,String.class));