[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; ]@E_Hx{S
} mQEE?/xX;
int i1=l; FYPv:k
int i2=mid+1; ;e,_F/@`
for(int cur=l;cur<=r;cur++){ q.sErr[zc
if(i1==mid+1) :[![9JS/
data[cur]=temp[i2++]; y4sKe:@2
else if(i2>r) }-YM>q
data[cur]=temp[i1++]; JSz;>
else if(temp[i1] data[cur]=temp[i1++]; pG"pvfEl9f
else <u "xHl8Io
data[cur]=temp[i2++]; 4<%(Y-_sF
} ..jc^'L
} cbe&SxJ
cGF_|1`
} wEd+Ds]$
sG-$d\ 1d
改进后的归并排序: 8<V6W F`e
L#U-dzy\
package org.rut.util.algorithm.support; "&h{+DHS
r{NCI
import org.rut.util.algorithm.SortUtil; sBUK v(U)
9*s''=
/** bO8>w9MF
* @author treeroot !O|d,)$q
* @since 2006-2-2 a,eR'L<"*-
* @version 1.0 p;8I@~dh
*/ r?cDyQE
public class ImprovedMergeSort implements SortUtil.Sort { 6.#5Ra
+yC]f b
private static final int THRESHOLD = 10; ,uz+/K%OA5
Ot,_=PP
/* T''PzY!Qf
* (non-Javadoc) [l~Gwaul>
* 72Zp%a=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )|52B;yZx
*/ 8ckcTNPu
public void sort(int[] data) { Ltk'`
int[] temp=new int[data.length]; UXs=7H".
mergeSort(data,temp,0,data.length-1); |76G#K~<X
} d}d1]@Y\
R\i8O^[
private void mergeSort(int[] data, int[] temp, int l, int r) { sGBm[lplz
int i, j, k; .>X0 $#
int mid = (l + r) / 2; ;i;2cq
if (l == r) |ZJ<J)y
return; tccw0
if ((mid - l) >= THRESHOLD) vw.rkAGY
mergeSort(data, temp, l, mid); 2il)@&^
else dSdP]50M
insertSort(data, l, mid - l + 1); dWR-}>
if ((r - mid) > THRESHOLD) MKdS_&F;~
mergeSort(data, temp, mid + 1, r); !UzMuGj
else 8%+F.r
insertSort(data, mid + 1, r - mid); 3bWYRW
B|fh 4FNy
for (i = l; i <= mid; i++) { v d{`*|x
temp = data; c@|!0 U%j
} O {hM
for (j = 1; j <= r - mid; j++) { !sTOo
temp[r - j + 1] = data[j + mid]; W't?aj I|
} K^zu{`S
int a = temp[l]; i>*|k]
int b = temp[r]; Xl/SDm_p
for (i = l, j = r, k = l; k <= r; k++) { rofGD9f
if (a < b) { $Gy&
data[k] = temp[i++]; kzkrvC+u
a = temp; OuZPgN
} else { i(Xz3L#(
data[k] = temp[j--]; c6f=r
b = temp[j]; tfAO#htq
} v47S9Vm+
} YK{E=<:
} (GCeD-
Wx8oTN
/** /W|=Or2oR
* @param data vC [uEx:
* @param l `GpOS_;
* @param i t| cL!
*/ M+|J;caX
private void insertSort(int[] data, int start, int len) { VG=mA4Dd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .#OD=wkN0
} =xs"<Q*w>
} ,N1I\f
} _\ &N<
} hI#1Ybl
`;c{E%qeq
堆排序： /19ZyQw9
6OPYq*|
package org.rut.util.algorithm.support; L|`(u
e[($rsx
import org.rut.util.algorithm.SortUtil; uE=pq<
Chs#}=gzi
/** q}+Fm?B
* @author treeroot nYb{?{_ca8
* @since 2006-2-2 + e3{J_
* @version 1.0 DGJt$o=&@
*/ #*tWhXU
public class HeapSort implements SortUtil.Sort{ X4$86
g;eoH
/* (non-Javadoc) P 5_l&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0_f6Qrcj
*/ 3*C|"|lJ
public void sort(int[] data) { Tya[6b!8
MaxHeap h=new MaxHeap(); 6V&HlJH
h.init(data); c?t,,\o(}
for(int i=0;i h.remove(); x!`~+f.6
System.arraycopy(h.queue,1,data,0,data.length); 2'-!9!C
} sKniqWi
x@Ze%$'
private static class MaxHeap{ '\wZKYVN
hhr!FQ.+/
void init(int[] data){ 2JR$
this.queue=new int[data.length+1]; nl/~7({
for(int i=0;i queue[++size]=data; A>B_~=
fixUp(size); \1f&D!F]b
} mGC!7^_D`
} d+L!s7
QT)5-Jy
private int size=0; 1=Y pNXX
Z[%vO?,
private int[] queue; yk0#byW`
g+pj1ycw/
public int get() { ^77X?nDz=h
return queue[1]; *R_mvJlT
} O!ngQrI
"8*5!anu-
public void remove() { UC*\3:>'n
SortUtil.swap(queue,1,size--); zcCGREe=
fixDown(1); -P>up)p
} U6Xi-@XP
file://fixdown W</\F&
private void fixDown(int k) { 7T/hmVi_
int j; ATkx_1]KM-
while ((j = k << 1) <= size) { D"ecwx{%;C
if (j < size %26amp;%26amp; queue[j] j++; u8N"i),
if (queue[k]>queue[j]) file://不用交换 )o N#%%SB<
break; 3x3 =ke!
SortUtil.swap(queue,j,k); sV$Zf `X)
k = j; R$M>[Kjn
} -esq]c%3
} q7aH=dhw
private void fixUp(int k) { ODyKS;
while (k > 1) { ;Sw%t(@
int j = k >> 1; a8v9j3.
if (queue[j]>queue[k]) y%@C-:
break; p)YI8nW
SortUtil.swap(queue,j,k); Cw,;>>Y_b<
k = j; mY0FewwTy
} "[Hn G(gA
} M0Vs9K=
*jrQ-'<T
} 3.@I\p}
oQ/ Dg+Xp
} U#' WP
L3|~ i&k
SortUtil： 9Pjw<xt
B4{clI_i
package org.rut.util.algorithm; |\6Ff/O
uj^l&"
import org.rut.util.algorithm.support.BubbleSort; df@G+v0_1
import org.rut.util.algorithm.support.HeapSort; u[+/WFH
import org.rut.util.algorithm.support.ImprovedMergeSort; U "kD)\
import org.rut.util.algorithm.support.ImprovedQuickSort; 'l&bg8K9
import org.rut.util.algorithm.support.InsertSort; /;9iDjG
import org.rut.util.algorithm.support.MergeSort; h-6zQs
import org.rut.util.algorithm.support.QuickSort; D{G~7P\.
import org.rut.util.algorithm.support.SelectionSort; zA%$l&QN]
import org.rut.util.algorithm.support.ShellSort; "fZWAGDBO\
`R@b`3*%v
/** aZB$%#'vR
* @author treeroot o@W:PmKW
* @since 2006-2-2 T.GB*
* @version 1.0 AH'4k(-
*/ fUa[3)I
public class SortUtil { 4elA<<
public final static int INSERT = 1; z=pGu_`2
public final static int BUBBLE = 2; JH`oa1b
public final static int SELECTION = 3; < +X,oxg
public final static int SHELL = 4; la{Iqm{i
public final static int QUICK = 5; GPLq$^AH
public final static int IMPROVED_QUICK = 6; >A ?{cbJ
public final static int MERGE = 7; &N:`Rler
public final static int IMPROVED_MERGE = 8; NhF<2[mt
public final static int HEAP = 9; (hn;C>B
i27KuPjC
public static void sort(int[] data) { &)GlLpaT
sort(data, IMPROVED_QUICK); p$_X\,F
} EU4j'1!&g<
private static String[] name={ Z[G:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >NjgLJh
}; xXfFi5Eom
B~7]x;8h
private static Sort[] impl=new Sort[]{ X\HP&;Wd
new InsertSort(), >@uFye$
new BubbleSort(), Yu_` >so
new SelectionSort(), :!<U"AC
new ShellSort(), J8#3?Lp
new QuickSort(), `~+[pY1r
new ImprovedQuickSort(), YT\.${N
new MergeSort(), aa,^+^J
new ImprovedMergeSort(), #xfPobQ>il
new HeapSort() IfzZ\x .
}; KvkU]s_
0S$6j-"
public static String toString(int algorithm){ X}G3>HcP
return name[algorithm-1]; |7@@~|A
} [28Vf"#]
x{I, gu|+
public static void sort(int[] data, int algorithm) { IXof-I%8
impl[algorithm-1].sort(data); =q?sB]n
} b_>x;5k
]D&\|,,(
public static interface Sort { |rwx;+
public void sort(int[] data); m`6=6(_p
} rkWiGiisM
;Wedj\Kkp
public static void swap(int[] data, int i, int j) { #v}pn2g%>
int temp = data; EVW\Z 2N.
data = data[j]; *TC#|5
data[j] = temp; %WAaoR&u
} W:V.\
} rhj_cw