使用 "=" 在执行策略的时候 会抛出 com.ql.util.express.exception.QLException: run QlExpress Exception at line 1 :指令错误:2 不是Boolean 异常, 但是使用"=="不会

[HYKINGDOM]

version
<dependency> <groupId>com.alibaba</groupId> <artifactId>QLExpress</artifactId> <version>3.3.4</version> </dependency>

test code
`
@test
public void contextLoads_01() throws Exception {

    DefaultContext<String, Object> context = new DefaultContext<>();
    context.put("a", 1);
    context.put("b", 2);
    context.put("c", 3);
    String express = "a + b * c + a";
    Object r = runner.execute(express, context, null, true, false);
    assertEquals("8", r.toString(), r.toString());
}

@Test
public void contextLoads_03() throws Exception {

    DefaultContext<String, Object> context = new DefaultContext<>();
    context.put("b", 2);
    context.put("c", 3);
    context.put("a", 5);
    String express = "(a == 1) || ( b = 2) && ( c = 3 ) ";
    // 会抛出异常 com.ql.util.express.exception.QLException: run QlExpress Exception at line 1 :指令错误:2 不是Boolean
    Object r = runner.execute(express, context, null, true, false);
    assertEquals("true", r.toString(), r.toString());
}

@Test
public void contextLoads_04() throws Exception {

    DefaultContext<String, Object> context = new DefaultContext<>();
    context.put("a", 1);
    context.put("b", 2);
    context.put("c", 3);
    String express = "(a == 1) || ( b = 2) && ( c = 3 ) ";
    //执行正常
    Object r = runner.execute(express, context, null, true, false);
    assertEquals("true", r.toString(), r.toString());
}

@Test
public void contextLoads_04_01() throws Exception {

    DefaultContext<String, Object> context = new DefaultContext<>();
    context.put("a", 1);
    context.put("b", 2);
    context.put("c", 3);
    String express = "(a == 1) || ( b == 2) && ( c == 3 ) ";
    //执行正常
    Object r = runner.execute(express, context, null, true, false);
    assertEquals("true", r.toString(), r.toString());
}

@Test
public void contextLoads_05() throws Exception {

    DefaultContext<String, Object> context = new DefaultContext<>();
    context.put("a", 1);
    context.put("b", 2);
    context.put("c", 3);
    String express = "(a == 5) || ( b = 2) && ( c = 3 ) ";
    //执行异常 com.ql.util.express.exception.QLException: run QlExpress Exception at line 1 :指令错误:2 不是Boolean
    Object r = runner.execute(express, context, null, true, false);
    assertEquals("true", r.toString(), r.toString());
}

`

[DQinYuan]

= 是赋值，会返回被赋予的值。 == 才是判断相等