<dependency>

    <groupId>org.springframework</groupId>

    <artifactId>spring-expression</artifactId>

    <version>${spring.version}</version>

</dependency>

import org.junit.Test;

import org.springframework.expression.EvaluationContext;

import org.springframework.expression.Expression;

import org.springframework.expression.ExpressionParser;

import org.springframework.expression.spel.SpelCompilerMode;

import org.springframework.expression.spel.SpelParserConfiguration;

import org.springframework.expression.spel.standard.SpelExpression;

import org.springframework.expression.spel.standard.SpelExpressionParser;

import org.springframework.expression.spel.support.StandardEvaluationContext;

public class SpringELTest {

    @Test

    public void testEvaluationContext() {

    Account account = new Account("Deniro");

    ExpressionParser parser = new SpelExpressionParser();

    EvaluationContext context = new StandardEvaluationContext(account);

    Expression expression = parser.parseExpression("name");

    String result = expression.getValue(context, String.class);

    System.out.println("result:" + result);

    }

    @Test

    public void test1() {

    ExpressionParser parser = new SpelExpressionParser();

    Expression expression = parser.parseExpression("'SpEL'.concat(' thinking')");

    String result = (String) expression.getValue();

    System.out.println("result:" + result);

    }

    @Test

    public void test2() {

    ExpressionParser parser = new SpelExpressionParser();

    Expression expression = parser.parseExpression("6+2");

    Integer result = (Integer) expression.getValue();

    System.out.println("result:" + result);

    }

    @Test

    public void test3() {

    // Spel 解析配置器

    SpelParserConfiguration configuration = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, SpringELTest.class.getClassLoader());

    // 解析器

    SpelExpressionParser parser = new SpelExpressionParser(configuration);

    // 上下文

    EvaluationContext context = new StandardEvaluationContext(new Account("Deniro"));

    // 表达式

    String expression = "getName()";

    // 解析表达式

    SpelExpression spelExpression = parser.parseRaw(expression);

    System.out.println(spelExpression.getValue(context));

    }

}

public class Account {

    private String name;

    public Account(String name) {

        this.name = name;

    }

    public String getName() {

        return name;

    }

}