[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; ~q9RZ#g13J
} m760K*:i\
int i1=l; 5|/vc*m_0'
int i2=mid+1; m1cyCD
for(int cur=l;cur<=r;cur++){ /)G9w]|T
if(i1==mid+1) 7z$+ *]9-
data[cur]=temp[i2++]; v:+se6HY?p
else if(i2>r) 4SOj>(a#
data[cur]=temp[i1++]; ]F_u
else if(temp[i1] data[cur]=temp[i1++]; S !e0:
else ]f\rB8k|&
data[cur]=temp[i2++]; o 1b#q/
} 8=e\^Q+
} ?@XO*|xkSk
'.bMkty#
} F%Xq}LMd
(O&b:D/Y
改进后的归并排序: V2bod=&Lc
:4A^~+J
package org.rut.util.algorithm.support; t2E_y6
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import org.rut.util.algorithm.SortUtil; LO2sP"9
</}[x2w?]
/** .h6h&[TEU
* @author treeroot %AJdtJ@0H
* @since 2006-2-2 i7p3GBXh[
* @version 1.0 $;">/"7m
*/ WT0U)x( m5
public class ImprovedMergeSort implements SortUtil.Sort { b :+ X3
F |GWYw'%
private static final int THRESHOLD = 10; yZ2,AR%
.d*vfE$
/* 2{qoWys8[
* (non-Javadoc) aJfW75C
* ru U|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0lEIj/u
*/ 3j3AI7c
public void sort(int[] data) { 3Y8%5/D5
int[] temp=new int[data.length]; UR\*KR;yM
mergeSort(data,temp,0,data.length-1); c2y5[L7?
} 5H5<ft,
yK{~
private void mergeSort(int[] data, int[] temp, int l, int r) { ](O!6_'d
int i, j, k; 7<) .luV
int mid = (l + r) / 2; QM$?}>:
if (l == r) @U9ov >E
return; m/{rmtA4
if ((mid - l) >= THRESHOLD) w,P2_xk`
mergeSort(data, temp, l, mid); mbd@4u
else 4u;W1=+Vn
insertSort(data, l, mid - l + 1); w ggl,+7
if ((r - mid) > THRESHOLD) 'Kq%tM26!
mergeSort(data, temp, mid + 1, r); &^Xm4r%u_
else `fL$t0"
insertSort(data, mid + 1, r - mid); Ms$kL'/
sQ_{zOUPh
for (i = l; i <= mid; i++) { zi5;>Iv0}
temp = data; mO\6B7V!
} Ltu;sw
for (j = 1; j <= r - mid; j++) { -PX {W)Aw
temp[r - j + 1] = data[j + mid]; EBn7waBS
} =A,i9Z&
int a = temp[l]; _E1:3N|
int b = temp[r]; .|rpj&>g
for (i = l, j = r, k = l; k <= r; k++) { d6Z;\f7[
if (a < b) { ;Z8K3p
data[k] = temp[i++]; o|UZdGu
a = temp; Bkcs4 x
} else { 8 /\rmf\
data[k] = temp[j--]; 3cs'Oz<w
b = temp[j]; *l5/q\D
} *%MY. #
} GB{%4)%6
} _|#)tWy}
Bt.WRRpAB
/** Z*oGVr g
* @param data tewC *%3V
* @param l e}Db-7B_~
* @param i +4@EJRC
*/ a|OX4
private void insertSort(int[] data, int start, int len) { 1|Fukx<@J<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (llg!1
} H*!E*_
} ^c/.D*J[I
} -ERDWY
} JWEqy+,Fjw
9_&.G4%V
堆排序： QYg2'`(
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package org.rut.util.algorithm.support; Q.!D2RZc
f>Ij:b`Z2
import org.rut.util.algorithm.SortUtil; X)'uTf0
C7nLa@
/** aiz_6@Qfz*
* @author treeroot ;]'mx
* @since 2006-2-2 }PoB`H'K5
* @version 1.0 G"C'/
*/ o8Tt|Lxb$8
public class HeapSort implements SortUtil.Sort{ .)Du ;
&'i>5Y
/* (non-Javadoc) 6)Kg!.n%f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /9i2@#J}W1
*/ 38rC; 6
public void sort(int[] data) { %kyvtt
MaxHeap h=new MaxHeap(); Es)Kw3^a
h.init(data); Ut0oh
for(int i=0;i h.remove(); aLG6yVtu
System.arraycopy(h.queue,1,data,0,data.length); %\CsP!
} P0|V1,)
c!j$-Ovm
private static class MaxHeap{ hX<0{pXM4
Sl{]Z,
void init(int[] data){ 1*#64Y5F
this.queue=new int[data.length+1]; qA5tMZ^w
for(int i=0;i queue[++size]=data; RtN5\
fixUp(size); ^ @sg{_.~l
} =%p0rz|b
} <kp?*xV]]
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private int size=0; cbNrto9
6 fL=2a
private int[] queue; \&"gCv#
U+URj <)
public int get() { {}~7Gi!
return queue[1]; {QI"WFdGx
} K&\xbT
<-FAF:6$@@
public void remove() { r. :LZEr
SortUtil.swap(queue,1,size--); M2{{B^*$6
fixDown(1); ' FF@I^O
} REli`"bR
file://fixdown yd'>Mw
private void fixDown(int k) { 5hg:@i',
int j; [a`89'"z
while ((j = k << 1) <= size) { >6KuZ_
if (j < size %26amp;%26amp; queue[j] j++; 7gNJ}pLDx
if (queue[k]>queue[j]) file://不用交换 X=8y$Yy
break; }f/ 1
SortUtil.swap(queue,j,k); )|zLjF$
k = j; Etj@wy/E
} 2ntL7F<ow
} +7.\>Ucq`
private void fixUp(int k) { 4v_<<l
while (k > 1) { FxW~Co
int j = k >> 1; 3)3?/y)_
if (queue[j]>queue[k]) jEo)#j];`<
break; 59 R;n.Q
SortUtil.swap(queue,j,k); !#Ub*qY1Z
k = j; i]Njn k
} scT,yNV
} IxkL]
uD4on}
} (p>?0h9[
TgoaEufS<
} ]ri5mnB
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SortUtil： Yw7txp`i
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package org.rut.util.algorithm; Y23- Im
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import org.rut.util.algorithm.support.BubbleSort; aA7}>
import org.rut.util.algorithm.support.HeapSort; MAb*4e#
import org.rut.util.algorithm.support.ImprovedMergeSort; K&3,J7&&
import org.rut.util.algorithm.support.ImprovedQuickSort; ^ ~'&K e
import org.rut.util.algorithm.support.InsertSort; '1+s^Q'pc
import org.rut.util.algorithm.support.MergeSort; d|;S4m`
import org.rut.util.algorithm.support.QuickSort; 0%&ZR=y(G
import org.rut.util.algorithm.support.SelectionSort; B]iPixA6
import org.rut.util.algorithm.support.ShellSort; piULIZ0
0n<>X&X
/** E^qJ5pr_P
* @author treeroot _3~/Z{z8
* @since 2006-2-2 qQ6rF nA
* @version 1.0 ?71?Vd
*/ l!qhK'']V"
public class SortUtil { hg4d]R,
public final static int INSERT = 1; tpPP5C{
public final static int BUBBLE = 2; Gj!9#on$7R
public final static int SELECTION = 3; C.4r`F$p
public final static int SHELL = 4; ]ie38tX$
public final static int QUICK = 5; F#-mseKhc
public final static int IMPROVED_QUICK = 6; ",O |uL
public final static int MERGE = 7; >8M=REn4
public final static int IMPROVED_MERGE = 8; Bie#GKc
public final static int HEAP = 9; =>3wI'I
#0kVhx7%
public static void sort(int[] data) { Is&0h|
sort(data, IMPROVED_QUICK); 8z1#Q#5
} WVZ](D8Gc]
private static String[] name={ [`J91=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lDsT?yHS`Z
}; nQ*9E|Vx
X\4d|VJ?m
private static Sort[] impl=new Sort[]{ ddK\q!0
new InsertSort(), iq1HA.X(
new BubbleSort(), .bYZkO:oy
new SelectionSort(), &X3G;x2;
new ShellSort(), 2i0 .x
new QuickSort(), 3']a1\sy^
new ImprovedQuickSort(), aW=c.Q.
new MergeSort(), @I"&k!e<2
new ImprovedMergeSort(), 0{Uc/
new HeapSort() Eqizx~eqq
}; pKZRgA#kN
{=I:K|&
public static String toString(int algorithm){ R`5g#
return name[algorithm-1]; aC90IJ8^
} P K+rr.k]
.q90+9Ek=
public static void sort(int[] data, int algorithm) { ]y0bgKTK
impl[algorithm-1].sort(data); epN!+(v
} JkShtLEr
\<ko)I#%
public static interface Sort { / <C{$Gu
public void sort(int[] data); IN8G4\r
} lQl!TW"aO
)2sE9G,
public static void swap(int[] data, int i, int j) { Yyxsj9
int temp = data; Xfc+0$U@
data = data[j]; 6.Jvqn
data[j] = temp; &zR\Rmpt
} 3#A4A0
} \+)aYP2Hu