java *** 作数据库Oracle 当出现SQL异常时用e.getMessage()获取异常信息，为什么在异常信息末尾有个换行符

Interactive PlottingExample — Selecting Plotting Points from the Screen

You can interact with graphs or generate x-y coordinates interactively The ginput function enables you to use the mouse or the arrow keys to select points to plot ginput returns the coordinates of the pointer's position, either the current position or the position when a mouse button or key is pressed For more information see the ginput function You can use it to pick points on a graph to return their x and y values for processing, to outline an area of interest, or to draw arbitrary shapes

This example illustrates the use of ginput with the spline function to create a curve by interpolating in two dimensions

First, select a sequence of points, [x,y], in the plane with ginput Then pass two one-dimensional splines through the points, evaluating them with a spacing one-tenth of the original spacing:

axis([0 10 0 10])hold on% Initially, the list of points is emptyxy = [];n = 0;% Loop, picking up the pointsdisp('Left mouse button picks points')disp('Right mouse button picks last point')but = 1;while but == 1 [xi,yi,but] = ginput(1); plot(xi,yi,'ro') n = n+1; xy(:,n) = [xi;yi];end% Interpolate with a spline curve and finer spacingt = 1:n;ts = 1: 01: n;xys = spline(t,xy,ts);

% Plot the interpolated curveplot(xys(1,:),xys(2,:),'b-');hold off

This plot shows some typical output:

看个例子

create or replace procedure tes as

sqlc integer;

begin

insert into t1 values (1);

sqlc:=sqlcode;

if sqlc=0 then

dbms_outputput_line('成功！');

else

dbms_outputput_line('失败！');

end if;

end;

using (SqlCommand command1 = connCreateCommand())

{

string GetlastID = "select top 1 Pic_ID from PicTable order by Pic_ID desc";

command1CommandText = @GetlastID;

fileID=command1ExecuteScalar(); //fileID ，Pi_ID都是int类型的

}

//这样应该就没问题了

//command1ExecuteNonQuery()这个方法是返回影响行数的，不是返回查询的结果的

try

{

    执行数据库 *** 作语句;

}

catch（SQLException e）//SQLException是SQL数据库所有异常的基类 任何SQL异常都在里面

{

    捕获到异常后执行的 *** 作;

}

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