Support letters other than A-Z in identifiers in SpEL expressions

[changyoutianxia]

Affects: Spring Framework 5.3.13

---

SpEL does not support Chinese.

Example:

    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    static class Simple {
        private String 张三;
    }

    @Test
    void testSpel() {
        ExpressionParser parser = new SpelExpressionParser();
        Expression exp = parser.parseExpression("张三 == null ? 'World' : 张三");
        Simple rootObject = new Simple("test");

        Object value = exp.getValue(rootObject);
        System.out.println(value);

    }

[k143408]

Try

ExpressionParser parser = new SpelExpressionParser();
Expression expression = parser.parseExpression("'你好，世界！'");
        
String message = (String) expression.getValue();
System.out.println(message); // Prints "你好，世界！"

[sbrannen]

Try

ExpressionParser parser = new SpelExpressionParser();
Expression expression = parser.parseExpression("'你好，世界！'");
        
String message = (String) expression.getValue();
System.out.println(message); // Prints "你好，世界！"

@k143408, your example demonstrates SpEL's support for Chinese characters within a String literal.

Whereas, @changyoutianxia's example uses Chinese characters in a property name (i.e., a getter method in the root context object).

[sbrannen]

Related Issues

• Improve error message for unsupported character in SpEL expression #30602