[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; u/4|Akui
} zbP#y~[
int i1=l; /N`E4bKBR
int i2=mid+1; W\<p`xHk
for(int cur=l;cur<=r;cur++){ +vCW${U
if(i1==mid+1) [&p^h
data[cur]=temp[i2++]; %-~T;_.
else if(i2>r) ){XG%nC
data[cur]=temp[i1++]; $,B@yiie
else if(temp[i1] data[cur]=temp[i1++]; UZqk2D
else V7i1BR8G
data[cur]=temp[i2++]; |.[4$C
} #[ hJm'G
} )qx,>PL
C6(WnO{6
} t /CE,DQ
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改进后的归并排序: }mSfg
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package org.rut.util.algorithm.support; 9% AL f 9
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import org.rut.util.algorithm.SortUtil; W]DZ'
IMay`us]:8
/** '74-rL:i
* @author treeroot o%\pI%
* @since 2006-2-2 (3+:/,{'$
* @version 1.0 sz%'=J~!V
*/ Mlr}v^"G
public class ImprovedMergeSort implements SortUtil.Sort { zE\@x+k.
{9C+=v?
private static final int THRESHOLD = 10; O8%Y .SK
>E`p@ e+
/* b_T?jCyW
* (non-Javadoc) fdRw:K8
* y!?l;xMS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pn6!QpV5
*/ yp:_W@
public void sort(int[] data) { ONw;NaE,
int[] temp=new int[data.length]; jPf*qe>U
mergeSort(data,temp,0,data.length-1); fUgI*V
} 4#BoS9d2I<
=+j>?Yi
private void mergeSort(int[] data, int[] temp, int l, int r) { *PjW,
int i, j, k; Q1?G7g]N
int mid = (l + r) / 2; 9@."Y>1G
if (l == r) +aWI"d--h
return; 4_w+NI,;
if ((mid - l) >= THRESHOLD) &18CCp\3)c
mergeSort(data, temp, l, mid); __,1;=
else 1k}U+
insertSort(data, l, mid - l + 1); HrZ\=1RB
if ((r - mid) > THRESHOLD) #}rv)
mergeSort(data, temp, mid + 1, r); DdL0MGwX
else RjS&^uaP
insertSort(data, mid + 1, r - mid); n(#159pZ
-S"$S16D
for (i = l; i <= mid; i++) { N{<=s]I%x
temp = data; s]=s|
} ;h"?h*}m!\
for (j = 1; j <= r - mid; j++) { ,HFoy-Yq
temp[r - j + 1] = data[j + mid]; }#/,nJm'
} v"6ijk&(
int a = temp[l]; eSgCS*}0$z
int b = temp[r]; @P^8?!i+
for (i = l, j = r, k = l; k <= r; k++) { wcT0XXh
if (a < b) { {^xp?zpV
data[k] = temp[i++]; XHu2G t_
a = temp; t$z FsFTQ
} else { D$RQD{*
data[k] = temp[j--]; 9 1r"-%(r
b = temp[j]; ^p0BeSRiy;
} FasA f(3
} {yy^DlHb
} "s]c79t
bX:ARe O
/** ^< ,Np+
* @param data Jk)^6
* @param l q=5#t~?
* @param i J['paHSF
*/ 1|VnPQqA
private void insertSort(int[] data, int start, int len) { #qk A*WP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VR>;{>~
} PEPBnBA&1
} uhFj|r$$
} a(X?N.w
} J>P{8Aw
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堆排序： JBCcR,\kM*
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package org.rut.util.algorithm.support; fmvX;0O
vv _I o
import org.rut.util.algorithm.SortUtil; \d0R&vFHQ
`/'Hq9$F<"
/** 5uK:f\y)l
* @author treeroot zLlu%Oc
* @since 2006-2-2 A-O@e e
* @version 1.0 nBGFa
*/ bmotR8d
public class HeapSort implements SortUtil.Sort{ ]k%Yz@*S
F7`3,SzHp
/* (non-Javadoc) #;Y JR9VN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <JKRdIx&1
*/ LXaT_3;
public void sort(int[] data) { 31LXzQvFG
MaxHeap h=new MaxHeap(); 8?4j-
h.init(data); @8TD^ub
for(int i=0;i h.remove(); /'IOi`d
System.arraycopy(h.queue,1,data,0,data.length); u{'bd;.7
} 5tg
1O1/P,u+
private static class MaxHeap{ ?k~(E`ZE3
dF*@G/p>V
void init(int[] data){ y88FT#hR|5
this.queue=new int[data.length+1]; ;CD.8f]N
for(int i=0;i queue[++size]=data; cs7TAX
fixUp(size); "_JGe#=
} {T Z7>k
} V+X>t7.Q
2JZf@x+}
private int size=0; .N8AkQ(Ok
<jT6|2'
private int[] queue; K*Zf^g m
k7Fa+Y)K7
public int get() { ~#dNGWwG
return queue[1]; 2H_|Attoi
} b w!;ZRK
[rv"tz=
public void remove() { _*1/4^
SortUtil.swap(queue,1,size--); w{Wz^=';
fixDown(1); 7</&=lly
} Z9s tB>?
file://fixdown ]lzt"[
private void fixDown(int k) { [K;J#0V+&L
int j; Qj?+R F6(
while ((j = k << 1) <= size) { 3qPj+@
if (j < size %26amp;%26amp; queue[j] j++; j0!Z 20
if (queue[k]>queue[j]) file://不用交换 m]BxGwT=m
break; A^2VH$j]+
SortUtil.swap(queue,j,k); "W;GvI
k = j; C)`k{(-{
} n4+l,~
} 0.C y4sH'
private void fixUp(int k) { _rXTHo7P
while (k > 1) { Tm5]M$)
int j = k >> 1; v'7,(.E
if (queue[j]>queue[k]) k'X v*U
break; ziR}
SortUtil.swap(queue,j,k); |BnjT*_9
k = j; s_-G`xT>{
} $*^Ms>Pa_
} R+FBCVU&TJ
D(D:/L8T,
} Rz1&(_Ps
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} zME75;{
D)XF@z;
SortUtil： Eym<DPu$n
`:!mPNW#
package org.rut.util.algorithm; eKNZ?!c=
:}0y[qc3
import org.rut.util.algorithm.support.BubbleSort; r k;k:<c
import org.rut.util.algorithm.support.HeapSort; ^AK<]r<?L?
import org.rut.util.algorithm.support.ImprovedMergeSort; zE5%l`@|o
import org.rut.util.algorithm.support.ImprovedQuickSort; 9(DS"fgC
import org.rut.util.algorithm.support.InsertSort; $-m@cObw!.
import org.rut.util.algorithm.support.MergeSort; \];0S4SBy
import org.rut.util.algorithm.support.QuickSort; W"+*%x
import org.rut.util.algorithm.support.SelectionSort; "5u*C#T2$
import org.rut.util.algorithm.support.ShellSort; BpZE
[ps5;
/** #N_C|v/
* @author treeroot cq+|fg~Yy
* @since 2006-2-2 6Y0k}+j|>E
* @version 1.0 SuU,SE'TX
*/ n=l>d#}$%T
public class SortUtil { J`a$"G B.
public final static int INSERT = 1; Aa-L<wZVPt
public final static int BUBBLE = 2; fOCLN$x^
public final static int SELECTION = 3; ;@GlJ '$;
public final static int SHELL = 4; 3JM0 m (
public final static int QUICK = 5; UVlD]oXKh
public final static int IMPROVED_QUICK = 6; xGTVC=q
public final static int MERGE = 7; wgxr8;8`q
public final static int IMPROVED_MERGE = 8; "2q}G16K
public final static int HEAP = 9; fy" q
6/Y3#d
public static void sort(int[] data) { `z%f@/:fG
sort(data, IMPROVED_QUICK); VVO C-:
} P:vAU8d>
private static String[] name={ {/G~HoY1i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )WavG1
}; 13wO6tS k
[ZU6z?Pf
private static Sort[] impl=new Sort[]{ ]3]I`e{
new InsertSort(), =mxG[zDtQ
new BubbleSort(), XQ]noaU
new SelectionSort(), &^Q-:Kxs8
new ShellSort(), >%5Ld`c:SD
new QuickSort(), awh<CmcZ
new ImprovedQuickSort(), B-PN +P2
new MergeSort(), -/rP0h5#
new ImprovedMergeSort(), /]m5HW(P7K
new HeapSort() S0\QZ/je
}; U8qb2'a8
U;u@\E@2
public static String toString(int algorithm){ d\dh"/_$
return name[algorithm-1]; WG>Nm89
} lYldq)qB{
"vI:B}
public static void sort(int[] data, int algorithm) { m/uBM6SXx
impl[algorithm-1].sort(data); >J!4x(;Yh
} 7p*PDoM6`
VA+ ?xk
public static interface Sort { 5'wWj}0!%
public void sort(int[] data); Uo?g@D
} !qk+>6~A,
K8M[xaI@
public static void swap(int[] data, int i, int j) { jsB%RvX
int temp = data; =n.d'
data = data[j]; w%F~4|F
data[j] = temp; <]<P<
} ^k6 A,Ak
} nR'!Ui