[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; }~P%S(zB
} fDc>E+,
int i1=l; [8*Ovd
int i2=mid+1; cBf9-k
for(int cur=l;cur<=r;cur++){ ;t!n%SnK9!
if(i1==mid+1) ,h21 h?6
data[cur]=temp[i2++]; mv@cGdxu
else if(i2>r) ;\`~M
data[cur]=temp[i1++]; Enee\!@v
else if(temp[i1] data[cur]=temp[i1++]; ~;St,Fw<<
else +EJwWDJ!%
data[cur]=temp[i2++]; +|.}oL^}G
} !_GY\@}
} 4)D#kP
?wE@9g A
} Zu(eYH=Q
8@%Xd^
改进后的归并排序: ~ILig}I
;9r Z{'i+|
package org.rut.util.algorithm.support; Q(SVJ
1xK'1g72
import org.rut.util.algorithm.SortUtil; xt]Z{:.
v-6"*EP
/** YwGc[9=n
* @author treeroot r\]yq-_
* @since 2006-2-2 ';`fMcN
* @version 1.0 Ke-Q>sm2Q
*/ kN uDoo]z
public class ImprovedMergeSort implements SortUtil.Sort { z9:@~3k.
$iQ>c6
private static final int THRESHOLD = 10; x_1JQDE
}*Qd]\fy
/* tq=1C=h
* (non-Javadoc) "sLdkd}dj
* <4jQbY;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y7SOz'd
*/ :0o $qz2
public void sort(int[] data) { h"VQFqQy
int[] temp=new int[data.length]; Tks;,C
mergeSort(data,temp,0,data.length-1); cT{iMgdI?
} AoHA+>&U
*D`qcv
private void mergeSort(int[] data, int[] temp, int l, int r) { 'G6TSl
int i, j, k; [+$l/dag
int mid = (l + r) / 2; `NA[zH,w3
if (l == r) Cpaeo0Oq
return; Vzy]N6QT{
if ((mid - l) >= THRESHOLD) ?7-#iC`
mergeSort(data, temp, l, mid); 7}bjJR "
else ];Whvdnv
insertSort(data, l, mid - l + 1); JV'd!5P
if ((r - mid) > THRESHOLD) /=Ug}%.
mergeSort(data, temp, mid + 1, r); Q0~5h?V'
else M<JJQh5
insertSort(data, mid + 1, r - mid); p>v,b&06
-Hzn7L
for (i = l; i <= mid; i++) { ^|}C!t+
temp = data; 2{s ND
} bHlG(1uf
for (j = 1; j <= r - mid; j++) { qG"|,bA
temp[r - j + 1] = data[j + mid]; j`Lf/S!}
} iHjo3_g)n
int a = temp[l]; A/N*Nc
int b = temp[r]; Bc}<B:q%b
for (i = l, j = r, k = l; k <= r; k++) { `7jm
if (a < b) { Fk D
data[k] = temp[i++]; mOwgk7s[J
a = temp; >7!aZO
} else { _dqjRhu
data[k] = temp[j--]; @_YEK3l]l
b = temp[j]; zF/}s_><*
} [i[G" %Q
} vZ 4Z+;.
} Y~1}B_
jIE>t5 fy
/** kFv\V
* @param data 7UHqiA`L
* @param l ?97MW a
* @param i DGY#pnCu
*/ yb/< 7
private void insertSort(int[] data, int start, int len) { W9 y8dw.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Orh5d7+S
} uZZ[`PA(
} 3M{!yPlj
} rP ;~<IxEr
} (Wr;:3i
Y^LFJB|b4
堆排序： 8DTk<5mW~
1W~-C B>
package org.rut.util.algorithm.support; `.aL>hf
0!=e1_
import org.rut.util.algorithm.SortUtil; 3sGrX"0D
f[7'kv5S
/** t^?8Di\
* @author treeroot E E?v~6"&
* @since 2006-2-2 A`(p6 H"s
* @version 1.0 bI[!y#_z4
*/ N-^\X3X
public class HeapSort implements SortUtil.Sort{ /iif@5lw{
+Smv<^bW
/* (non-Javadoc) B2d$!Any
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >0 !J]gK
*/ 4\pA^%73
public void sort(int[] data) { d1e'!y}R5
MaxHeap h=new MaxHeap(); &o"Hb=k<
h.init(data); }=A6Jv(j
for(int i=0;i h.remove(); T.ub!,Y
System.arraycopy(h.queue,1,data,0,data.length); rQ}4\PTi
} qIjC-#a=m
|L;'In
private static class MaxHeap{ :EgdV
CW\o>yh
void init(int[] data){ /p\Ymq
this.queue=new int[data.length+1]; =@pm-rI|-
for(int i=0;i queue[++size]=data; xHsH .f_{
fixUp(size); `^AbFV 3
} 6(9Ta'ywZ
} lk.Q6saI1
F/j=rs,*|D
private int size=0; k6JB%m\E
8e\a_R*(|
private int[] queue; k`g+
w2]1ftY
public int get() { vzi=[A
return queue[1]; &8"a7$
} 8e>;E
8g>jz 8
public void remove() { >o.u,
SortUtil.swap(queue,1,size--); W<!q>8Xn?
fixDown(1); BCUw"R#
} RB/[(4
file://fixdown (i*1M
private void fixDown(int k) { ?[!.TU?4N
int j; bG^eP:r
while ((j = k << 1) <= size) { Jr17pu(t
if (j < size %26amp;%26amp; queue[j] j++; 4n3QW%#
if (queue[k]>queue[j]) file://不用交换 2IjqTL
break; hN\E8"To
SortUtil.swap(queue,j,k); w41#?VC/
k = j; hph 3kfR
} 1<\cMY6
} p00\C
private void fixUp(int k) { Rp`}"x9
while (k > 1) { l^$:R~gS
int j = k >> 1; PNc200`v4_
if (queue[j]>queue[k]) d,<ctd
break; !LIWoa[ F.
SortUtil.swap(queue,j,k); asQ" |]m
k = j; /SMp`Q88
} S\0"G*
} :\80*[=;Z
}d.R=A9L
} Gw+z8^|C&}
EVq<gGy
} S}Mxm2
!@VmaAT
SortUtil： Kjz,p^Y\
$ya#-pi`;
package org.rut.util.algorithm; >5^Z'!Z"
[*}[W6 3v
import org.rut.util.algorithm.support.BubbleSort; ;/oMH/,U8
import org.rut.util.algorithm.support.HeapSort; ZLL0 6p
import org.rut.util.algorithm.support.ImprovedMergeSort; Nq*\{rb
import org.rut.util.algorithm.support.ImprovedQuickSort; 0w+hf3K+:
import org.rut.util.algorithm.support.InsertSort; c"O\fX
import org.rut.util.algorithm.support.MergeSort; k9^P#l@p
import org.rut.util.algorithm.support.QuickSort; [j93Mp
import org.rut.util.algorithm.support.SelectionSort; 0A 4(RLGg
import org.rut.util.algorithm.support.ShellSort; f[|xp?ef
' J-(v
/** _|A)ueY
* @author treeroot $~D`-+J
* @since 2006-2-2 :~T:&;q0
* @version 1.0 <[~x]-
*/ Hlz4f+#I
public class SortUtil { +!_^MBkk
public final static int INSERT = 1; ;U20g:K
public final static int BUBBLE = 2; #mllVQ
public final static int SELECTION = 3; vjXvjv{t
public final static int SHELL = 4; ir]uFOj
public final static int QUICK = 5; R4IFl z
public final static int IMPROVED_QUICK = 6; xY!]eLZ)&
public final static int MERGE = 7; 3I"&Qp%2
public final static int IMPROVED_MERGE = 8; h+Q==
public final static int HEAP = 9; k.lnG5e
mD)Nh
public static void sort(int[] data) { 8<]>q
sort(data, IMPROVED_QUICK); a?JU(
} %{HqF>=~
private static String[] name={ /@wm?ft6Gk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wh*OD
}; q1?2 U<
x7NxHTL
private static Sort[] impl=new Sort[]{ RIJBHOa
new InsertSort(), m7RWuI,
new BubbleSort(), iz*aBXVA[
new SelectionSort(), |Cen5s W&
new ShellSort(), H<NYm#a"
new QuickSort(), wV-cpJ,}
new ImprovedQuickSort(), Z&.FJZUP
new MergeSort(), *E$D,
new ImprovedMergeSort(), zZf#E@=$|
new HeapSort() !o.g2
}; Tl=vgs1
z4f5@
public static String toString(int algorithm){ U3za}3
return name[algorithm-1]; RsV<*s
} t8P>s})[4
55!9U:{
public static void sort(int[] data, int algorithm) { ^MddfBwk
impl[algorithm-1].sort(data); =} vG|
} ;<MaCtDt
(O<lVz@8
public static interface Sort { G+%ZN
public void sort(int[] data); Ab(bvS8r$
} Cog:6Gnw
c3 wu&*p{
public static void swap(int[] data, int i, int j) { tXp)o>"
int temp = data; 2XI%4
data = data[j]; SA/0Z=
data[j] = temp; ,U2D&{@
} \/$v@5
} r},|kb