org.springframework.jdbc.BadSqlGrammarException: StatementCallback; bad SQL grammar [SELECT * FROM

org.springframework.jdbc.BadSqlGrammarException: StatementCallback; bad SQL grammar [SELECT * FROM DEMO_ORDER WHERE 1=1and order_id = '1']; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order_id = '1'' at line 1 
org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:233)
org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72) 
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这个错误主要sql语句出错了，在自己查找的时候，感觉逻辑没有错误，一直找不到错误。
原来的sql语句如下：
String sql = "select * from demo_order";
sql.append("and order_id = '"+ searchValue +"');


经过仔细研究，将整句话拼接：select * from demo_orderand order_id = '"+ searchValue +"'；
错误就变得十分明显了，and前面缺少空格，导致dql语句报错。