[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; i(xL-&{
} Kc+9n%sp
int i1=l; .[Ny(X/]/}
int i2=mid+1; $BOpjDV8
for(int cur=l;cur<=r;cur++){ ~u r}6T
if(i1==mid+1) 8_3WCbe/
data[cur]=temp[i2++]; lT'V=,Y t
else if(i2>r) qnO/4\qq
data[cur]=temp[i1++]; d%oHcn
else if(temp[i1] data[cur]=temp[i1++]; V_KHVul
else %@%~<U)W
data[cur]=temp[i2++]; #*G}v%Ow/u
} =E&1e;_xlE
} (R!.=95@
s2K8|q=
} zZV9`cqZ{
pzU:AUW
改进后的归并排序: 1c`Yn:H^
3GZrVhU?m
package org.rut.util.algorithm.support; I2?g'tz
i^eDM.#X
import org.rut.util.algorithm.SortUtil; 5gwEr170
QtOT'<2t]
/** FOqD
* @author treeroot M\kct7Y
* @since 2006-2-2 mm N$\2
* @version 1.0 C3; d.KlV
*/ EHt(!;?q
public class ImprovedMergeSort implements SortUtil.Sort { 83Fmu/(
['I5(M@
private static final int THRESHOLD = 10; QW&@>i
Tg v]30F)
/* 5ma~Pjt8}
* (non-Javadoc) 8HdjZ!
* a<Ps6'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wr2F]1bh@
*/ |LE*R@|3$
public void sort(int[] data) { AaJz3oncJ
int[] temp=new int[data.length]; wQX%*GbL2
mergeSort(data,temp,0,data.length-1); , ins/-3
} OI)/J;[-e
%X(|Z4dL
private void mergeSort(int[] data, int[] temp, int l, int r) { {^Q1b.=
int i, j, k; wdEQB-dA
int mid = (l + r) / 2; 0+_:^z
if (l == r) PL*kjrLu7
return; G88g@Exk
if ((mid - l) >= THRESHOLD) g=kuM
mergeSort(data, temp, l, mid); .T7S1C $HP
else E XQ3(:&
insertSort(data, l, mid - l + 1); gOn^}%4.I
if ((r - mid) > THRESHOLD) Tv~Ys#
mergeSort(data, temp, mid + 1, r); 9'h4QF+Y
else yv.(Oy
insertSort(data, mid + 1, r - mid); Gu K!<-Oz"
YDiru
for (i = l; i <= mid; i++) { l1}HJmom
temp = data; O`='8'6zW\
} =/qj vY
for (j = 1; j <= r - mid; j++) { OeY+Yt0
temp[r - j + 1] = data[j + mid]; qvN 5[rb
} j*@EJ"Gm>
int a = temp[l]; *qL"&h5W
int b = temp[r]; Y1U\VU
for (i = l, j = r, k = l; k <= r; k++) { ,2^zX]dgM
if (a < b) { T\$r|
data[k] = temp[i++]; H%`|yUE(
a = temp; ;p2a .P
} else { |>AHc_:$$
data[k] = temp[j--]; jRo4+8
b = temp[j]; 1M/_:UH`
} agxR V
} D*o[a#2_
} rQD7ZN_ R
[[9XqD]
/** p+d?k"WN?
* @param data >Y[nU~w
* @param l XKT2u!Lx
* @param i 9x9~u8j
*/ iWu^m+"k
private void insertSort(int[] data, int start, int len) { 6?(vXPpT$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MnymV;y"
} K=X13As_
} 0'.7dzz
} /J0ctJ2k
} 6N.+
%["V "{ z
堆排序： e4?p(F-x(
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package org.rut.util.algorithm.support; {QRrAi
QnNddCiu=
import org.rut.util.algorithm.SortUtil; nPS:T|*G
ykbTWp$Y4Z
/** >rb8A6
* @author treeroot -v7O*xm"
* @since 2006-2-2 Swg%[r=p=
* @version 1.0 m6=Jp<
*/ nofK(0TF
public class HeapSort implements SortUtil.Sort{ P1f@?R&t+
my^2}>wi
/* (non-Javadoc) h16i]V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jvfQG:F }
*/ Lw!Q*3c
public void sort(int[] data) { YKT=0
MaxHeap h=new MaxHeap(); Z#P:C":e
h.init(data); KDzTe9
for(int i=0;i h.remove(); ayvHS&h
System.arraycopy(h.queue,1,data,0,data.length); %+,7=Wt-
} ;jgJI~3l
aV'r oxM
private static class MaxHeap{ [C"[#7
`K^j:fE7n
void init(int[] data){ {KO+t7'Q
this.queue=new int[data.length+1]; *3>$f.QU
for(int i=0;i queue[++size]=data; .}.63T$h9
fixUp(size); ;.<0lnV
} $WV N4fg
} BCK0fk~
5@xl/
private int size=0; IfdgMELk
Y79{v nlGk
private int[] queue; hD5G\TR.
$stBB
public int get() { %wYGI
return queue[1]; CQ+WBTiC
} (t\ F>A
]"Qm25`Qz
public void remove() { [N-t6Z*
SortUtil.swap(queue,1,size--); 'kz[Gh*8
fixDown(1); |rDv!m
} 8=#J:LeXj
file://fixdown E4nj*Lp~+
private void fixDown(int k) { 8=%%C:
int j; i"{ \ >
while ((j = k << 1) <= size) { X~ AE??
if (j < size %26amp;%26amp; queue[j] j++; ; iK9'u
if (queue[k]>queue[j]) file://不用交换 N<\U$\i
break; ^\X-eeA
SortUtil.swap(queue,j,k); FYe(SV(9
k = j; Q]q`+ Z65
} 5+gSpg]i
} _Co*"hl>2
private void fixUp(int k) { A{:PpYs
while (k > 1) { BihXYux*
int j = k >> 1; @GB~rfB[
if (queue[j]>queue[k]) g)<t=+a
break; L%[om c?
SortUtil.swap(queue,j,k); wi]F\ q"Y^
k = j; a/Cd;T2
} se)vi;J7K
} *)V1Sd#m
uHv9D%R
} ^b{w\HZ
RN0@Q~oTI
} BnLM;5 >
rI\G&OqpP
SortUtil： ;_.%S*W\
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package org.rut.util.algorithm; <Ct b^4$
r.5}Q?
import org.rut.util.algorithm.support.BubbleSort; z*cC2+R}=
import org.rut.util.algorithm.support.HeapSort; Ix;9D'^}
import org.rut.util.algorithm.support.ImprovedMergeSort; r*|#*"K"a
import org.rut.util.algorithm.support.ImprovedQuickSort; U{2[nF
import org.rut.util.algorithm.support.InsertSort; p nS{W \Q
import org.rut.util.algorithm.support.MergeSort; q1Ja*=r
import org.rut.util.algorithm.support.QuickSort; o<*H!oyP\
import org.rut.util.algorithm.support.SelectionSort; (RP"VEVR
import org.rut.util.algorithm.support.ShellSort; Jl-Lz03YG
YxEc(a"
/** hJavi>374
* @author treeroot o1j_5c PS
* @since 2006-2-2 s3+^q
* @version 1.0 "t4$%7L]
*/ vJheM*C
public class SortUtil { X~DI d
public final static int INSERT = 1; [ 7W@/qqv
public final static int BUBBLE = 2; -lKk.Y.}r
public final static int SELECTION = 3; Voi`OCut
public final static int SHELL = 4; ZGUhje!
public final static int QUICK = 5; VP|ga}(
public final static int IMPROVED_QUICK = 6; G@Z,Hbgm
public final static int MERGE = 7; 1gEeZ\B-&
public final static int IMPROVED_MERGE = 8; |IbCN
public final static int HEAP = 9; 0B0Uay'd_
F;Q8^C0e*c
public static void sort(int[] data) { ;aJBx
sort(data, IMPROVED_QUICK); (nWi9(}J
} 1(z&0Y;
private static String[] name={ 0ZY.~b'eu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -!OFt}
}; P8lx\DA
czMThm
private static Sort[] impl=new Sort[]{ lkNaSz[
new InsertSort(), J?d&+mt
new BubbleSort(), 2R:I23[#B
new SelectionSort(), ys+ AY^/
new ShellSort(), ]?n)!u
new QuickSort(), N"X;aVFs_
new ImprovedQuickSort(), a}~Xns
new MergeSort(), D^+#RR'#,
new ImprovedMergeSort(), 0^l|W|.Z
new HeapSort() zJE$sB.f
}; Q{hXP*5
5$kv,%ah
public static String toString(int algorithm){ 1&S34wJF
return name[algorithm-1]; `Zn2Vx
} {U:c95#.!S
iGG;
public static void sort(int[] data, int algorithm) { jSLNQ
impl[algorithm-1].sort(data); k 7 !{p
} E;[ANy4L
)sWC5\
public static interface Sort { (DzV3/+p^
public void sort(int[] data); o)_;cCr)q
} K!|%mI8gk
[nQ<pTg~r
public static void swap(int[] data, int i, int j) { e0i&?m
int temp = data; $vlc@]~d`&
data = data[j]; H{Zfbb
data[j] = temp; +9S_H(
} +bi%4DA
} ~-r*2bR