[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; 28rC>*+z
} WI+ 5x
int i1=l; .o!z:[IPY
int i2=mid+1; FA#?+kd
for(int cur=l;cur<=r;cur++){ ! !9l@
if(i1==mid+1) V`;$Ua;y
data[cur]=temp[i2++]; MlBw=Nr
else if(i2>r) !`VC4o
data[cur]=temp[i1++]; tq^d1b(j4
else if(temp[i1] data[cur]=temp[i1++]; m?$peRn3{
else vxrRkOU1
data[cur]=temp[i2++]; 5|^{t00T~
} ./!6M
} 'z}Hg *
/e0cx:.w
} qauZ-Qoc9
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改进后的归并排序: AHA4{Zu[
M zbs#v0
package org.rut.util.algorithm.support; &D[pX|!
h)746T )
import org.rut.util.algorithm.SortUtil; ZX Sl+k.
p>c`GDU
/** 8!c#XMHV
* @author treeroot W6>SYa
* @since 2006-2-2 .;'3Roi
* @version 1.0 t=;84lA
*/ X%>Sio
public class ImprovedMergeSort implements SortUtil.Sort { ~il{6Z+#n
w|uO)/v
private static final int THRESHOLD = 10; UOg4E
H%*<t}
/* /0J1_g
* (non-Javadoc) DrTo")T
* XazKS4(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?5oeyBA@
*/ Q.8)_w
public void sort(int[] data) { $YM6}D@
int[] temp=new int[data.length]; +C(v4@=nd
mergeSort(data,temp,0,data.length-1); vGT#BS%
} Du3nK"-g
N2~q\BqA
private void mergeSort(int[] data, int[] temp, int l, int r) { 8] BOq:
int i, j, k; T|c9Swur
int mid = (l + r) / 2; 2+Tu"oG;rB
if (l == r) 0{O|o_
return; y<<:6OBj
if ((mid - l) >= THRESHOLD) P2+Z^J`Y>
mergeSort(data, temp, l, mid); A?q9(n|A"
else +gQn,HX
insertSort(data, l, mid - l + 1); [uh$\s7
if ((r - mid) > THRESHOLD) | Ts0h?"a
mergeSort(data, temp, mid + 1, r); ~alC5|wCUQ
else gD\ =
insertSort(data, mid + 1, r - mid); MR/8
$6c8<!B_
for (i = l; i <= mid; i++) { ET&Q}UOE
temp = data; Pkm3&sW
} H9^DlIv('
for (j = 1; j <= r - mid; j++) { 2A+I8/zRG
temp[r - j + 1] = data[j + mid]; y'9 bs
} &m'ttUG?
int a = temp[l]; ?d -$lI
int b = temp[r]; dtdz!'q)Y
for (i = l, j = r, k = l; k <= r; k++) { |^ao,3h#
if (a < b) { 3']yjj(gHr
data[k] = temp[i++]; _Vs\:tygs
a = temp; Nz,8NM]
} else { "o*zZ;>^
data[k] = temp[j--]; 3KF[ v{
b = temp[j]; k]n=7vw;
} +;}XWV
} f8Xe%"<
} 9*@Kl`\
-'tgr6=|w"
/** bIP'(B#1K
* @param data ZjE!? '(ef
* @param l 4I>I
* @param i amL8yb
*/ (L)tC*Qjc
private void insertSort(int[] data, int start, int len) { >?$+hZz<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0nF>E@j^[
} mxYsP6&
} O^D$ ~ ]
} rsp?N{e
} 0aMw
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堆排序： axl!zu*
CL^MIcq?
package org.rut.util.algorithm.support; FuZ7xM,
#Fua^]n
import org.rut.util.algorithm.SortUtil; }NMkL l]J
ys5b34JN
/** G?Y2 b
* @author treeroot w%no6 ;
* @since 2006-2-2 x}.Q9L
* @version 1.0 s^nwF>
*/ MSmvQ
public class HeapSort implements SortUtil.Sort{ 4MVa[0Y
<uugT9By
/* (non-Javadoc) QY,.|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JNzNK.E!m-
*/ mW_<c,3D.
public void sort(int[] data) { /"t*gN=wrF
MaxHeap h=new MaxHeap(); x,\PV>
h.init(data); |M?yCo
for(int i=0;i h.remove(); =H_|007C
System.arraycopy(h.queue,1,data,0,data.length); t(4%l4i;X
} OBF2?[V~
{]\QUXH
private static class MaxHeap{ 5Pis0fa
]_S&8F}|
void init(int[] data){ *pMgjr
this.queue=new int[data.length+1]; 9w -t9X>X
for(int i=0;i queue[++size]=data; :@TfhQV_=Q
fixUp(size); x}G["ZU}v]
} zMT0ToG
} 1;p'2-x
0u4:=Z}W
private int size=0; $1N_qu
Hnwir!=7
private int[] queue; <;d?E%`
&Bbs\ ;
public int get() { a G^kL
return queue[1]; 54kd>)|"ag
} S6 F28 d[j
u-zl-?Ne
public void remove() { 2\ /(!n
SortUtil.swap(queue,1,size--); =N,Mmz%
fixDown(1); So*Q8`"-.
} klG]PUzd
file://fixdown 3S-nsMs.
private void fixDown(int k) { .c'EXuI7),
int j; ~y+QL{P4~
while ((j = k << 1) <= size) { .y{qsL^P
if (j < size %26amp;%26amp; queue[j] j++; fbKL31PI
if (queue[k]>queue[j]) file://不用交换 FO{K=9O
break; Be{7Rj v
SortUtil.swap(queue,j,k); NTk"W!<Cl2
k = j; {]~b^=qE$
} uE~? 2G
} j+:q:6=
private void fixUp(int k) { lm}mXFf#
while (k > 1) { 3&!X8Lhv
int j = k >> 1; C,R_`%b%
if (queue[j]>queue[k]) uhUC m
break; lHwQ'/r
SortUtil.swap(queue,j,k); e,qc7BJzK
k = j; e2Sudd=' G
} Akf?BB3bC
} zE +)oQ,
(!Q^.C_m
} ~A+DH
3&kHAXzM
} y; Up@.IG
QDS=M]
SortUtil： 6R1){,8
C6=7zYhR
package org.rut.util.algorithm; F8km8lPQl
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import org.rut.util.algorithm.support.BubbleSort; N3Ub|$}q
import org.rut.util.algorithm.support.HeapSort; mh>)N"
import org.rut.util.algorithm.support.ImprovedMergeSort; 5V\\w~&/
import org.rut.util.algorithm.support.ImprovedQuickSort; 2HBYReQ
import org.rut.util.algorithm.support.InsertSort; UBp0;)-
import org.rut.util.algorithm.support.MergeSort; >ZKE
import org.rut.util.algorithm.support.QuickSort; yz!j9pJ
import org.rut.util.algorithm.support.SelectionSort; IiV:bHUE}0
import org.rut.util.algorithm.support.ShellSort; p%_#"dkC7
s5>=!yX
/** `d,hP"jBc
* @author treeroot -"iGcVV
* @since 2006-2-2 ["}0umt
* @version 1.0 ?<\K!dA
*/ DQ^yqBVgQ
public class SortUtil { oJy]n9
public final static int INSERT = 1; L2[|g~
public final static int BUBBLE = 2; oJw~g[
public final static int SELECTION = 3; /"+n{*9
public final static int SHELL = 4; 0"$Ui#r`
public final static int QUICK = 5; :e:jILQ[
public final static int IMPROVED_QUICK = 6; ~HsPYc8Fz
public final static int MERGE = 7; .,[zI@9
public final static int IMPROVED_MERGE = 8; p`-`(i=iJo
public final static int HEAP = 9; }zi:nSpON
M@S6V7
public static void sort(int[] data) { CF3Z`xD
sort(data, IMPROVED_QUICK); 3Xaw
} _B)LRD+Hj
private static String[] name={ I~EQuQ>=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KFBo1^9N
}; (Vglcj
=jjUwcl
private static Sort[] impl=new Sort[]{ nmp(%;<exN
new InsertSort(), 6|3$43J,F
new BubbleSort(), L)JpMf0
new SelectionSort(), .w^M?}dx
new ShellSort(), /u{ 9UR[g
new QuickSort(), L3P_
new ImprovedQuickSort(), =NwmhV
new MergeSort(), 1 ry:Z2
new ImprovedMergeSort(), 09`5<9/
new HeapSort() DYJ@>8
}; J]5sWs
zr%lBHuW
public static String toString(int algorithm){ #q40 >)]
return name[algorithm-1]; $;Lb|~
} *yOpMxE
?c0OrvM
public static void sort(int[] data, int algorithm) { "0Uh(9Fv
impl[algorithm-1].sort(data); sY!PXD0Q
} )Ac+5bs
N7k<q=r-
public static interface Sort { *xXa4HB
public void sort(int[] data); mV0F^5
} q05_5
~hPp)-A
public static void swap(int[] data, int i, int j) { 9*2A}dH
int temp = data; .Y[sQO~%
data = data[j]; x F7C1g(
data[j] = temp; e~jw YImA
} 'WkDpa
} 'n%Ac&kk