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    代码如下:

    sql1 = " test0 set name = " + tf1.() + "where test0.id = "++"";

    抛出的异常如下:

    com.mysql.jdbc..jdbc4.ption: You have an error in your SQL ; check the that to your MySQL for the right to use near 'test0.id = ' at line 1

    at sun...( )

    at sun...( )

    at sun...( )

    at java.lang...( )

    at com.mysql.jdbc.Util.(Util.java:411)

    at com.mysql.jdbc.Util.(Util.java:386)

    at com.mysql.jdbc..(.java:1054)

    at com.mysql.jdbc..(.java:4190)

    at com.mysql.jdbc..(.java:4122)

    at com.mysql.jdbc..(.java:2570)

    at com.mysql.jdbc..(.java:2731)

    at com.mysql.jdbc..(.java:2812)

    at com.mysql.jdbc..(.java:2761)

    at com.mysql.jdbc..(.java:894)

    at com.mysql.jdbc数据库update出问题..(.java:732)

    at 修改员工信息界面$2.(修改员工信息界面.java:444)

    at javax.swing..( )

    at javax.swing.$.( )

    at javax.swing..( )

    at javax.swing..( )

    at javax.swing.plaf.basic..( )

    at java.awt..( )

    at javax.swing..( )

    at java.awt..( )

    at java.awt..( )

    at java.awt..( )

    at java.awt..( )

    at java.awt..( )

    at java.awt.r.( )

    at java.awt.r.( )

    at java.awt.r.( )

    at java.awt..( )

    at java数据库update出问题.awt..( )

    at java.awt..( )

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    at java.awt..rs( )

    at java.awt..( )

    at java.awt..hy( )

    at java.awt..( )

    at java.awt..( )

    at java.awt..run( )

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