使用mybatis查詢是報錯,SQL異常:Parameter index out of range (1 > number of parameters, which is 0),感覺很奇怪,檢查了好久才發現犯了個特別low的問題。
錯誤提示:
java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
at com.mysql.jdbc.PreparedStatement.checkBounds(PreparedStatement.java:3326)
at com.mysql.jdbc.PreparedStatement.setInternal(PreparedStatement.java:3310)
at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:4146)
at ado.User_ADO.selOperation(User_ADO.java:60)
at unit.ProssSeverl.rundom(ProssSeverl.java:95)
at unit.ProssSeverl.regidit(ProssSeverl.java:71)
at unit.ProssSeverl.Dealwith(ProssSeverl.java:43)
at unit.ProssSeverl.service(ProssSeverl.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
問題根源在查詢使用查詢時,在?的兩邊添加了單引號。
<select id="queryAllService" resultType="java.util.Map" parameterType="java.util.Map">
SELECT
service.id,
service.`name`,
SERVER .ip,
service.`port`,
service.software,
service.instance,
service.username,
service.`password`,
service.version
FROM
ldp_gov_service service
INNER JOIN ldp_gov_server SERVER on SERVER.id= service.server_id
where service.software_type = '0'
<if test="keyWord != null">
AND service.`name` LIKE CONCAT(CONCAT('%','#{keyWord}','%'))
</if>
</select>
上面就是報錯代碼塊,在#{keyWord}兩邊加上了單引號,把單引號去掉就可以了。
帶有單引號,SQL語句爲:SELECT service.id, service.name, SERVER .ip, service.port, service.software, service.instance, service.username, service.password, service.version FROM ldp_gov_service service INNER JOIN ldp_gov_server SERVER ON SERVER.id = service.server_id WHERE service.software_type = '0' AND service.name LIKE CONCAT(CONCAT('%', '?', '%'))
?號兩邊有單引號,SQL就沒辦法執行。