Spring JDBCTemplate Mysql 从 Mysql 驱动程序中抛出 ArrayIndxOutofBound

Question

我正在尝试使用 JDBCTemplate query() 获取记录并将参数绑定作为 Map 传递。 Mysql 正在抛出 ArrayIndeOutOfBoundException 。下面是堆栈跟踪。

Exception in thread "main" org.springframework.dao.TransientDataAccessResourceException: PreparedStatementCallback; SQL [select * from customers where cid= :cid]; 

Invalid argument value: java.lang.ArrayIndexOutOfBoundsException; nested exception is java.sql.SQLException: Invalid argument value: 

java.lang.ArrayIndexOutOfBoundsException
    at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:108)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:645)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:680)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:712)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:722)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:777)
    at com.jlcnindia.spring.jdbc.JdbcCustomerDAO.getCustomerByCid(JdbcCustomerDAO.java:32)
    at com.jlcnindia.spring.jdbc.Lab58.main(Lab58.java:14)
Caused by: java.sql.SQLException: Invalid argument value: java.lang.ArrayIndexOutOfBoundsException
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:937)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:872)
    at com.mysql.jdbc.PreparedStatement.setSerializableObject(PreparedStatement.java:3887)
    at com.mysql.jdbc.PreparedStatement.setObject(PreparedStatement.java:3603)
    at org.springframework.jdbc.core.StatementCreatorUtils.setValue(StatementCreatorUtils.java:428)
    at org.springframework.jdbc.core.StatementCreatorUtils.setParameterValueInternal(StatementCreatorUtils.java:235)
    at org.springframework.jdbc.core.StatementCreatorUtils.setParameterValue(StatementCreatorUtils.java:166)
    at org.springframework.jdbc.core.ArgumentPreparedStatementSetter.doSetValue(ArgumentPreparedStatementSetter.java:66)
    at org.springframework.jdbc.core.ArgumentPreparedStatementSetter.setValues(ArgumentPreparedStatementSetter.java:47)
    at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:686)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:629)
    ... 6 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
    at com.mysql.jdbc.PreparedStatement.setBinaryStream(PreparedStatement.java:2871)
    at com.mysql.jdbc.PreparedStatement.setSerializableObject(PreparedStatement.java:3884)
    ... 14 more

这是我的 RowMapper 类

package com.jlcnindia.spring.jdbc;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;

 public class CustomerRowMapper implements RowMapper<CustomerTO> {

@Override
public CustomerTO mapRow(ResultSet rs, int rn) throws SQLException {
    System.out.println("mapping ");
    CustomerTO cto=new CustomerTO();
    cto.setCid(rs.getInt(1));
    cto.setCname(rs.getString(2));
    cto.setEmail(rs.getString(3));
    cto.setPhone(rs.getLong(4));
    cto.setCity(rs.getString(5));
    return cto;

}

}

调用查询的Dao方法

public CustomerTO getCustomerByCid(int cid) {
    String sql="select * from customers where cid=:cid";

    Map<String,Object> parameters=new HashMap<String, Object>();
    parameters.put("cid", cid);

    List<CustomerTO> list=jdbcTemp.query(sql, new CustomerRowMapper(),parameters);
    if(null!=list && !list.isEmpty())
    return   list.get(0);
    return null;
}

CustomerTO 类

package com.jlcnindia.spring.jdbc;

public class CustomerTO {
private int cid;
private String cname;
private String email;
private long phone;
private String city;


public CustomerTO(){}

public CustomerTO(String cname, String email, long phone, String city) {
    super();
    this.cname = cname;
    this.email = email;
    this.phone = phone;
    this.city = city;
}




public int getCid() {
    return cid;
}


public void setCid(int cid) {
    this.cid = cid;
}


public String getCname() {
    return cname;
}


public void setCname(String cname) {
    this.cname = cname;
}


public String getEmail() {
    return email;
}


public void setEmail(String email) {
    this.email = email;
}


public long getPhone() {
    return phone;
}


public void setPhone(long phone) {
    this.phone = phone;
}


public String getCity() {
    return city;
}


public void setCity(String city) {
    this.city = city;
}

public String toString(){
    return cid+"\t"+cname+"\t"+email+"\t"+phone+"\t"+city;
}

}

如果我使用 ?而不是命名参数，并在查询中传递 cid 代替参数，如下所示

    public CustomerTO getCustomerByCid(int cid) {
    String sql="select * from customers where cid=?";
    List<CustomerTO> list=jdbcTemp.query(sql, new CustomerRowMapper(),cid);
    if(null!=list && !list.isEmpty())
    return   list.get(0);
    return null;
}

它工作正常并给了我结果，但是如果我像上面那样传递参数映射，我会得到异常。

不明白为什么

更新

Spring JBDC 模板配置

 <bean id="dataSource"  class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost/jlcindiadb"/>
<property name="username" value="****"/>
<property name="password" value="***"/>
</bean>
 <bean id="jdbcTemp" class="org.springframework.jdbc.core.JdbcTemplate"        autowire="constructor">
<constructor-arg ref="dataSource"/>
</bean>
<bean id="jdbcCustomerDAO" class="com.jlcnindia.spring.jdbc.JdbcCustomerDAO"/> 

Answer 1

JdbcTemplate 不支持命名参数。你需要...NamedParameterJdbcTemplate。

你调用的方法是that one:

public <T> List<T> query(String sql,
                         RowMapper<T> rowMapper,
                         Object... args)

如您所见，它将参数值作为参数。因此，您实际上将 Map 作为查询的唯一索引参数传递，但查询没有任何参数占位符，因此出现异常。