1.Java WinForm项目

public static void main(String[] args) {
		String testString="22";
		String testString2="1096";
		String testString3="22";
		
		Student student=new Student();
		student.Age="22";
		Test(student.Age);
        Test2(student.Age);
}



public static void Test(String a)
{
		if(a=="22")
		{
			System.out.println("Input 22");
		}
		else {
			System.out.println("Input else");
		}
}

public static void Test2(String a)
{
		if(a.equals("22"))
		{
			System.out.println("Input 22");
		}
		else {
			System.out.println("Input else");
		}
}

执行结果：

2.Java Sprint Boot项目

@ApiOperation("查询操作")
@ApiImplicitParams({
        @ApiImplicitParam(paramType = "query", name = "sql", dataType = "String", required = true, value = "查询语句", defaultValue = ""),
})
@RequestMapping(value = "/Query", method = RequestMethod.GET, produces = "application/json;charset=UTF-8")
public List<LinkedHashMap> Query(String sql) {
    /*
    int a = 0;
    List<LinkedHashMap> rs = new ArrayList<>();
    return rs;*/
    JSONArray jsonArray=new JSONArray();
    JSONObject jsonObject=new JSONObject();
    if(sql=="a")
    {
        jsonObject.put("type1","=");
    }
    if(sql.equals("a"))
    {
        jsonObject.put("type2","a");
    }
    jsonArray.add(jsonObject);
    return jsonArray;
}

执行结果：