[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; (X*^dO
} :?1Dko^
int i1=l; 8'y$M] e9n
int i2=mid+1; 0?|<I{z2
for(int cur=l;cur<=r;cur++){ NL+N%2XG7
if(i1==mid+1) wi{3/
data[cur]=temp[i2++]; ('+d.F[109
else if(i2>r) F#5~M<`.o
data[cur]=temp[i1++]; 5'u<iSmBo
else if(temp[i1] data[cur]=temp[i1++]; R[]Mdt<
else M x"\5i
data[cur]=temp[i2++]; 2&J)dtqz
} g2Z`zQA7
} }3WxZv]I}
'[%j@PlCX
} cQ}{[YO
m+z&Q
改进后的归并排序: @d1Q"9}B
+k R4E23:
package org.rut.util.algorithm.support; ":N9(}9
9QJyZ
import org.rut.util.algorithm.SortUtil; 4Ftu
N!tX<u~2
/** R[+<^s}p/
* @author treeroot :NTO03F7v
* @since 2006-2-2 `N8O"UcoBo
* @version 1.0 &_8947
*/ T6$+hUM$1
public class ImprovedMergeSort implements SortUtil.Sort { Pr C{'XDlU
a(ZcmYzXU
private static final int THRESHOLD = 10; {Qj~M<@3
@oGcuE
/* +:/%3}`
* (non-Javadoc) :7;@ZEe
* as=fCuJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %^6F_F_jS
*/ {?7Uj
public void sort(int[] data) { w_VP J
int[] temp=new int[data.length]; NDokSw-
mergeSort(data,temp,0,data.length-1); 9%obq/Lb
} YtLt*Ig%
vW@=<aS Z
private void mergeSort(int[] data, int[] temp, int l, int r) { Y8t8!{ytg
int i, j, k; */S_Icf
int mid = (l + r) / 2; XQw9~$
if (l == r) E _|<jy$`
return; 3Tm+g2w2V8
if ((mid - l) >= THRESHOLD) ~pky@O#b
mergeSort(data, temp, l, mid); u:
else |k00Z+O(
insertSort(data, l, mid - l + 1); z\4.Gm-
if ((r - mid) > THRESHOLD) ;q>ah!"k
mergeSort(data, temp, mid + 1, r); o^wqFX(Y
else X2"/%!65{
insertSort(data, mid + 1, r - mid); >/6 _ ^
+LJ73 !
for (i = l; i <= mid; i++) { u)Whr@m
temp = data; `kSZX:=};
} )=(kBWM
for (j = 1; j <= r - mid; j++) { G^@5H/)
temp[r - j + 1] = data[j + mid]; 9W);rL|5
} 7a}k
int a = temp[l]; bvOq5Q6
int b = temp[r]; + >!;i6|
for (i = l, j = r, k = l; k <= r; k++) { b\,+f n
if (a < b) { tX~w{|k
data[k] = temp[i++]; wb ;xRP"w
a = temp; qmP].sA
} else { ]eV8b*d6
data[k] = temp[j--]; K:WDl;8(d
b = temp[j]; 62NsJ<#>
} b#o|6HkW
} ]/{)bpu
} :rP=t ,
Zj Z^_X3
/** iU:cW=W|M\
* @param data >8[Z.fX
* @param l z'7]h TA
* @param i y>ktcuML
*/ )O6>*wq
private void insertSort(int[] data, int start, int len) { 43 :X,\~)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1xx}~|F?|
} 1B\WA8
} 0tJZ4(0
} _tycgq#
} BFt> 9x]T
o#N+Y?O
堆排序： c+GG\:gM
6wg^FD_Q
package org.rut.util.algorithm.support; EhBKj |y
Ws12b$
import org.rut.util.algorithm.SortUtil; c[s4EUG
wKY_Bo/d
/** $Ygue5{c
* @author treeroot *OQ2ucC8j
* @since 2006-2-2 - ! S_ryL
* @version 1.0 f)<6
*/ x|29L7i
public class HeapSort implements SortUtil.Sort{ CU~PT.
Kf-JcBsrT
/* (non-Javadoc) 7x8 yxE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fs^Mw go
*/ Y|/ 8up
public void sort(int[] data) { VS|2|n1<6
MaxHeap h=new MaxHeap(); DIUjn;>k8
h.init(data); o,wUc"CE
for(int i=0;i h.remove(); HOJV,9v N
System.arraycopy(h.queue,1,data,0,data.length); :MDKC /mC
} @KUWxFak
/<BI46B\
private static class MaxHeap{ *n"{J(Jt`
;GD]dW#
void init(int[] data){ 8JUwf
this.queue=new int[data.length+1]; 4`=mu}Y2
for(int i=0;i queue[++size]=data; |+"(L#wk
fixUp(size); ]{>,rK[So
} %xt^698&X
} V^~:F
Xlt|nX~#;
private int size=0; >KKMcTOYY
tZB<on<.)
private int[] queue; (uidNq
*gz{.)W
public int get() { BD7Ni^qI$
return queue[1]; S`]k>' l
} a-J.B.A$Z/
Yz93'HDB
public void remove() { J|rq*XD}q
SortUtil.swap(queue,1,size--); d<x7{?~.DK
fixDown(1); \lNN Msd&
} |e0`nn=
file://fixdown /_ajaz%
private void fixDown(int k) { A+?`?pOm&
int j; Uoix
while ((j = k << 1) <= size) { BfiD9ka-z
if (j < size %26amp;%26amp; queue[j] j++; ~7Ux@Sx;
if (queue[k]>queue[j]) file://不用交换 yEQs:v6L~
break; /2VJX@h
SortUtil.swap(queue,j,k); FXU8[j0P_G
k = j; ;]:@n;c\
} caX< n>
} h!9ei6
private void fixUp(int k) { ygl0k \
while (k > 1) { dUdT7ixo
int j = k >> 1; _PR4`C*
if (queue[j]>queue[k]) )Xyn q(
break; Yz)qcU
SortUtil.swap(queue,j,k); IO:G1;[/2L
k = j; -`6+UkOV[x
} (&x['IR
} sW8dPw O
vY`s'%WV
} Ny)X+2Ae
C+&l< fM&
} Eu04e N
seeBS/%
SortUtil： El"Q'(:/U
{H'Y `+
package org.rut.util.algorithm; o*hF<D$Y
FHI ;)wn=
import org.rut.util.algorithm.support.BubbleSort; ENY+^7
import org.rut.util.algorithm.support.HeapSort; BTrn0
import org.rut.util.algorithm.support.ImprovedMergeSort; ;i+#fQO7Q
import org.rut.util.algorithm.support.ImprovedQuickSort; 8DaL,bi*.
import org.rut.util.algorithm.support.InsertSort; ^sWT:BDh
import org.rut.util.algorithm.support.MergeSort; o2\8OxcA
import org.rut.util.algorithm.support.QuickSort; R@rBEW&
import org.rut.util.algorithm.support.SelectionSort; d m%8K6|
import org.rut.util.algorithm.support.ShellSort; ;i:d+!3XwC
RViuJ;
/** }*"p?L^p{
* @author treeroot Kx JqbLUC
* @since 2006-2-2 uY'HT|@:{
* @version 1.0 ^K@C"j?M/
*/ ` sU/& P
public class SortUtil { H} g{Cr"Ex
public final static int INSERT = 1; @Do= k
public final static int BUBBLE = 2; ;sFF+^~L
public final static int SELECTION = 3; [j'X;tVX{
public final static int SHELL = 4; 3sZ\0P}
public final static int QUICK = 5; ,s;UfF
public final static int IMPROVED_QUICK = 6; .#pU=v#/[
public final static int MERGE = 7; UW EV^ &"x
public final static int IMPROVED_MERGE = 8; t\ewHZG"
public final static int HEAP = 9; VY\&8n}e(
SasJic2M
public static void sort(int[] data) { )53y AyP
sort(data, IMPROVED_QUICK); du^J2m{f
} *CHX
private static String[] name={ _:27]K:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x-3\Ls[I
}; !%0 *z
6)Lk-D
private static Sort[] impl=new Sort[]{ :9 ^* ^T
new InsertSort(), kMd.h[X~
new BubbleSort(), 6!FQzFCZq
new SelectionSort(), VP]%Hni]
new ShellSort(), I~XSn>-H
new QuickSort(), S{m%H{A!
new ImprovedQuickSort(), *;*r8[U}q
new MergeSort(), PwLZkr@4^
new ImprovedMergeSort(), -3Vx76Y
new HeapSort() d6 5L!4
}; 83q6Sv
^y%T~dLkp'
public static String toString(int algorithm){ V "h +L7T
return name[algorithm-1]; ZJs$STJ*
} o"#\ >
IO-Ow!
public static void sort(int[] data, int algorithm) { [ibu/W$
impl[algorithm-1].sort(data); ~$?ZK]YOrx
} M/gGoE{
d>C$+v>
public static interface Sort { 'b{]:Y
public void sort(int[] data); `W*U4?M
} _5N]B|cO
N?"]
public static void swap(int[] data, int i, int j) { @sC`!Rmy'-
int temp = data; kPLxEwl
data = data[j]; W6/yn
data[j] = temp; D>tR-
} ^DwYOo2B
} p.?rey<%