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使用mybatis查询是报错,SQL异常:Parameter index out of range (1 > number of parameters, which is 0),感觉很奇怪,检查了好久才发现犯了个特别low的问题。
错误提示:
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)
问题根源在查询使用查询时,在?的两边添加了单引号。
<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>
上面就是报错代码块,在#{keyWord}两边加上了单引号,把单引号去掉就可以了。
带有单引号,SQL语句为: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('%', '?', '%'))
?号两边有单引号,SQL就没办法执行。