import org.springframework.expression.EvaluationContext;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;

一级目录

@Test
public void testA() {
    ExpressionParser parser = new SpelExpressionParser();
    EvaluationContext context = new StandardEvaluationContext();
    // 设置变量
    context.setVariable("name", "Alice");
    context.setVariable("age", 21);

    // 表达式求值  Alice is a 21 years old
    String result = parser.parseExpression("#name + ' is a ' + #age + ' years old'").getValue(context, String.class);
    System.out.println(result);
    // 条件判断  true
    Boolean isAdult = parser.parseExpression("#age >= 18").getValue(context, Boolean.class);
    System.out.println(isAdult);
}

二级目录

@Test
public void testA() {
    Map<String,String> riskTagMap = new HashMap<>();
    riskTagMap.put("一份工作", "#TAG.contains('工作')||#TAG.contains('职业')");
    riskTagMap.put("一束鲜花", "#TAG.contains('鲜花')&&#TAG.endsWith('花')");
    riskTagMap.put("七里香", "#TAG.startsWith('七')");

    ExpressionParser parser = new SpelExpressionParser();
    EvaluationContext context = new StandardEvaluationContext();
    List<String> strList = Arrays.asList("职业规划","工人作业","工作时间","鲜花店","一只鲜花","七个葫芦娃","还有七天");

    for (String str : strList) {
        context.setVariable("TAG", str);
        for (Map.Entry<String, String> entry : riskTagMap.entrySet()) {
            // SpEL（Spring Expression Language） 表达式
            Boolean result = parser.parseExpression(entry.getValue()).getValue(context, Boolean.class);
            if (result) {
                System.out.println(str);
            }
        }
    }
}