[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; ]K9x<@!
} j9u-C/Q\r
int i1=l; (tq)64XVz
int i2=mid+1; 9D#PO">|
for(int cur=l;cur<=r;cur++){ "4tRy9q
if(i1==mid+1) RycEM|51V
data[cur]=temp[i2++]; 7OWiG,
else if(i2>r) $e*Nr=/
data[cur]=temp[i1++]; >uuX<\cW
else if(temp[i1] data[cur]=temp[i1++]; C#-x 3d-{
else cE*|8'rSf
data[cur]=temp[i2++]; ~!A,I 9
} 5h> gz
} n)K6Z{x
AN~1E@"
} `z=MI66Nl
a|7V{pp=M
改进后的归并排序: +u=xBhZ
K5.C*|w
package org.rut.util.algorithm.support; iuHG9#n
;%jt;Xv9
import org.rut.util.algorithm.SortUtil; /BIPLDN6
;c>Yr?^
/** kcYR:;y
* @author treeroot nlY ^
* @since 2006-2-2 THua?,oyW
* @version 1.0 7k$8i9#
*/ }dXL= ul
public class ImprovedMergeSort implements SortUtil.Sort { z{n=G
0Hz3nd?v
private static final int THRESHOLD = 10; GS{9MGl
Ti)n(G9$
/* 0"QE,pLe4
* (non-Javadoc) 7CIje=u.q
* Zwt!nh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8%|x)
*/ 'QV4=h`
public void sort(int[] data) { ~0}eNz*
int[] temp=new int[data.length]; 'qM3.U
mergeSort(data,temp,0,data.length-1); q(r2\
} p5H Mg\hT
'Aqmf+Mm
private void mergeSort(int[] data, int[] temp, int l, int r) { Yj"UD:p
int i, j, k; pj )I4C)
int mid = (l + r) / 2; I0ie3ESdN
if (l == r) w}1)am&pD
return; Sph+kiy|
if ((mid - l) >= THRESHOLD) =_1" d$S&
mergeSort(data, temp, l, mid); ld?M,Qd
else 2~@=ua[|=5
insertSort(data, l, mid - l + 1); sS|zz,y
if ((r - mid) > THRESHOLD) 4Ek< 5s[
mergeSort(data, temp, mid + 1, r); YW}/CwB
else 95<:-?4C;W
insertSort(data, mid + 1, r - mid); RTU:J67E
o+t?OG/0
for (i = l; i <= mid; i++) { M)xK+f2_[
temp = data; )b7mzDp(
} dG rA18
for (j = 1; j <= r - mid; j++) { ='JX_U`A^F
temp[r - j + 1] = data[j + mid]; g<C})84y3
} z]WT>4
int a = temp[l]; + mcN6/
int b = temp[r]; 2 g8PU$T
for (i = l, j = r, k = l; k <= r; k++) { OiOL4}5(
if (a < b) { %x *f{(8h
data[k] = temp[i++]; @3@%9E
a = temp; ;F+%{LgKl
} else { .Sn1YAhE
data[k] = temp[j--]; |}}]&:w2
b = temp[j]; J91`wA&r
} :d#NnR0^L
} 9C.cz\E
} /f[_]LeV]
8vRiVJ8QS:
/** lrE0)B5F
* @param data M,@SUu v"
* @param l Z~|J"2.
* @param i QEgv,J{
*/ 9N29dp>g{{
private void insertSort(int[] data, int start, int len) { ;E&XFTdO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3q>"#+R.t
} ,*4"d._Y
} NLpD,q{
} [Ok8l='
} >H1d9y+Z
s`B'vyoaa
堆排序： kMo)4Xp
_e3'f:
package org.rut.util.algorithm.support; $!f$R`R^Q\
`R> O5Rv
import org.rut.util.algorithm.SortUtil; t5k&xV=~ #
)yP>}ME
/** o7+/v70D
* @author treeroot _~kcr5
* @since 2006-2-2 i/~J0qQ
* @version 1.0 P Cf|^X#B
*/ wl%1B64
public class HeapSort implements SortUtil.Sort{ LJy'wl
#dft-23
/* (non-Javadoc) JK(&E{80
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $VA4% 9
*/ 6S<$7=$=
public void sort(int[] data) { 6bGD8;
MaxHeap h=new MaxHeap(); Kv]6 b2HT
h.init(data); +XE21hb
for(int i=0;i h.remove(); 6!nb)auVi
System.arraycopy(h.queue,1,data,0,data.length); <@A^C$g
} "!tB";n
3$8}%?i
private static class MaxHeap{ ="DgrH
ttnXEF
void init(int[] data){ 3(:mRb}
this.queue=new int[data.length+1]; v,+@ U6i
for(int i=0;i queue[++size]=data; 0Nu]N)H5<l
fixUp(size); ,&=`T7i
} _iu|*h1y
} rieQ&Jt"
?N ga
private int size=0; aK{\8L3]
qM0MSwvC=
private int[] queue; +joE
)9r%% #
public int get() { v~\45eEA
return queue[1]; ([Aq
} ry ?2 o!
@:&+wq_>A^
public void remove() { O[y`'z;C
SortUtil.swap(queue,1,size--); ?/(K7>`
fixDown(1); l5[xJH
} ~@D%qbN
file://fixdown 6bcrPf}
private void fixDown(int k) { <.b$ gX
int j; |S{P`)z%f
while ((j = k << 1) <= size) { lF(!(>YZ
if (j < size %26amp;%26amp; queue[j] j++; 1Ol]^'y7)
if (queue[k]>queue[j]) file://不用交换 ugB{2oqi
break; i=N\[&
SortUtil.swap(queue,j,k); Wu( 8G
k = j; `tG_O
} s vb4uvY
} Rda1X~-g
private void fixUp(int k) { e<4z)
while (k > 1) { ?+5{HFx
int j = k >> 1; /8}+#h)[
if (queue[j]>queue[k]) Ye2];(M
break; V(u2{4gZ
SortUtil.swap(queue,j,k); C|\^uR0
k = j; Y:%)cUxA
} 2\{uqv
} Db=>7@h3C
S=,1} XZ
} J'yN' 0
1gm/{w6O
} O&w3@9KJ?
{@5WeWlz~
SortUtil： 1bg@[YN!;
@$d\5Q(G
package org.rut.util.algorithm; i\;&CzC:
8(5E<&JP
import org.rut.util.algorithm.support.BubbleSort; `^L<db^A
import org.rut.util.algorithm.support.HeapSort; \>Rwg=Lh
import org.rut.util.algorithm.support.ImprovedMergeSort; .)>/!|i
import org.rut.util.algorithm.support.ImprovedQuickSort; N&APqT
import org.rut.util.algorithm.support.InsertSort; {(}w4.!
import org.rut.util.algorithm.support.MergeSort; ~'J =!Xy
import org.rut.util.algorithm.support.QuickSort; LGROEn<*d
import org.rut.util.algorithm.support.SelectionSort; P0ltN
import org.rut.util.algorithm.support.ShellSort; )O@^H
!X%!7wsc
/** Gv,92ny!|
* @author treeroot "42$AaS
* @since 2006-2-2 o U}t'WU
* @version 1.0 sNfb %r
*/ P9"D[uz
public class SortUtil { &]6K]sWJK{
public final static int INSERT = 1; Kn#xY3W6
public final static int BUBBLE = 2; CS5jJi"pD3
public final static int SELECTION = 3; {]\uR-a(o
public final static int SHELL = 4; 3Ge<G
public final static int QUICK = 5; AKKU-5 B9c
public final static int IMPROVED_QUICK = 6; C.eV|rc@T
public final static int MERGE = 7; cm@oun
public final static int IMPROVED_MERGE = 8; U.Chf9a-
public final static int HEAP = 9; *OOa)P{^D
.8qzU47E
public static void sort(int[] data) { 5Vnr"d
sort(data, IMPROVED_QUICK); (U'7Fc
} z]l-?>Zbg
private static String[] name={ 1gShV ]2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o\ow{gh9
}; y'!p>/%v
Ot$cmBhw!
private static Sort[] impl=new Sort[]{ r(1pvcWY-
new InsertSort(), 3cfZ!E~^kc
new BubbleSort(), CESe}^)n
new SelectionSort(), Wytvs*\`
new ShellSort(), EkStb#
new QuickSort(), 3]`qnSYBv
new ImprovedQuickSort(), !|<f%UO
new MergeSort(), )fd-IYi-3
new ImprovedMergeSort(), Rhv".epz
new HeapSort() t6bWSz0
}; I0l.KiBm
xeYySM=
public static String toString(int algorithm){ 2gL[\/s
return name[algorithm-1]; ;/";d]j
} e,#+Xx0M
9SH<d)^
public static void sort(int[] data, int algorithm) { Gp ^ owr
impl[algorithm-1].sort(data); ;h-G3>Il
} DtF![0w/
=o{: -EKQF
public static interface Sort { }`9fZK{. @
public void sort(int[] data); e(n2+S#N
} RM^?&PM85
or!D
public static void swap(int[] data, int i, int j) { /R(U>pZ
int temp = data; krr-ZiK
data = data[j]; G{:af:5Fo
data[j] = temp; UOLTCp?M;J
} S0.- >"L
} 1RI#kti-"