[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; uZjI?Z.A
} a_T,t'6
int i1=l; vS;'}N
int i2=mid+1; VC&c)X
for(int cur=l;cur<=r;cur++){ 3><u*0qe%I
if(i1==mid+1) <HoAj"xf
data[cur]=temp[i2++]; q|#MB7e/
else if(i2>r) mMw;0/n
data[cur]=temp[i1++]; ma8wmQ9JR
else if(temp[i1] data[cur]=temp[i1++]; S)\8|ym6!
else A=3HO\n5
data[cur]=temp[i2++]; y0q#R.TOm
} s3t!<9[m
} Q}vbm4)[
'w<BJTQIL
} jp<VK<s]
iLq#\8t^
改进后的归并排序: lglYJ,
!e8i/!}^S
package org.rut.util.algorithm.support; ;b~~s.+
tm)*2lH6
import org.rut.util.algorithm.SortUtil; ~t/JCxa
CMVS W6
/** `| 9Ku
* @author treeroot $C_M&O}
* @since 2006-2-2 aiftlY
* @version 1.0 WYIw5jzC
*/ z]#hWfM4B:
public class ImprovedMergeSort implements SortUtil.Sort { B4W\ t{
2"/yEg*=
private static final int THRESHOLD = 10; 6 DP[g8
>9(i)e
/* UmP'L!
* (non-Javadoc) 2R@%Y/
* 9U<Hf32
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &TT":FPR
*/ V/y=6wUiSl
public void sort(int[] data) { 9{eBgdC
int[] temp=new int[data.length]; YdOUv|tZC
mergeSort(data,temp,0,data.length-1); P#tvm,
} 'V!kL, 9ES
=HE m)
private void mergeSort(int[] data, int[] temp, int l, int r) { %?tq;~|]Q
int i, j, k; Z;<ep@gy~
int mid = (l + r) / 2; U</+.$b
if (l == r) &hN,xpC
return; lizTRVBE
if ((mid - l) >= THRESHOLD) !WKk=ysFS
mergeSort(data, temp, l, mid); (K #A
else f!g<3X{=
insertSort(data, l, mid - l + 1); rihlae5Kz
if ((r - mid) > THRESHOLD) tV`&-H
mergeSort(data, temp, mid + 1, r); Pz473d
else LM1b I4
insertSort(data, mid + 1, r - mid); 'j79GC0
%W;u}`
for (i = l; i <= mid; i++) { c^S&F9/U*
temp = data; |9s wZ[
} &'O?es|Lb
for (j = 1; j <= r - mid; j++) { 5u,sx664
temp[r - j + 1] = data[j + mid]; R;THA!
} JSjYC0e
int a = temp[l]; q|{tQJfYg
int b = temp[r]; k>{-[X,/OV
for (i = l, j = r, k = l; k <= r; k++) { 3?ba 1F0Nw
if (a < b) { G[6=u|(M
data[k] = temp[i++]; tA qs2
a = temp; < l[`"0
} else { V\zsDP
data[k] = temp[j--]; `^%GN8d}nm
b = temp[j]; )73DT3-0$
} lG]GlgSs
} WEC-<fN|Y\
} |h,FUj<r
oQvFrSz
/** A?Sm-#n{
* @param data RndOm.TE
* @param l qJMp1DC
* @param i `u=<c
*/ h.b+r~u
private void insertSort(int[] data, int start, int len) { hEcYpng~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )6G+tU'
} |Ow$n
} 7SHo%bA
} 4TJ!jDkox
} ~7BX@?
Qa?QbHc
堆排序： Fe4esg-B<
w4}(Ab<Y
package org.rut.util.algorithm.support; >@Khm"/T
JS2!)aqc
import org.rut.util.algorithm.SortUtil; {G.{ad
6QptKXu7
/** KgU[
* @author treeroot YPQCOG
* @since 2006-2-2 ~%GSsm\J
* @version 1.0 * D3
*/ w{ m#Yt
public class HeapSort implements SortUtil.Sort{ 4H9xO[iM
Kz^hQd
/* (non-Javadoc) %0(>!SY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6cZ C
*/ HjPH
public void sort(int[] data) { L4mTs-M.
MaxHeap h=new MaxHeap(); hGKdGu`0
h.init(data); .Bijc G
for(int i=0;i h.remove(); mg/]4)SF
System.arraycopy(h.queue,1,data,0,data.length); qq>44k\|)
} V,'FlU
-(ER4#
private static class MaxHeap{ h=mv9=x
<on)"{W13
void init(int[] data){ mZ&]
this.queue=new int[data.length+1]; OAyE/Q|
for(int i=0;i queue[++size]=data; -CZ-l;5
fixUp(size); C9+Dw#-fV
} Xa\]ua_
} ?/L1tX)
T/3;NXe6E
private int size=0; 'Sk6U]E~
0Cv4/Ar(
private int[] queue; 4w2L?PDMi
EkV!hqs*
public int get() { l?N`V2SuR
return queue[1]; o}W7.7^2
} L/%xbm~
C890+(D~
public void remove() { E<P*QZ-C3
SortUtil.swap(queue,1,size--); 4t(QvIydA
fixDown(1); *xho
} 0MhxFoFO
file://fixdown pe|\'<>i
private void fixDown(int k) { q .)^B@}_
int j; -hm9sNox
while ((j = k << 1) <= size) { Is~yVB02
if (j < size %26amp;%26amp; queue[j] j++; C(ZcR_+r$,
if (queue[k]>queue[j]) file://不用交换 F.&*D~f
break; 9Z}S]-u/
SortUtil.swap(queue,j,k); 0c{Gr 0[>
k = j; p@`4 Qz
} Z'Zd[."s
} !FO:^P
private void fixUp(int k) { (jt*u (C&Y
while (k > 1) { 9yp^zL
int j = k >> 1; EzwF`3RjK
if (queue[j]>queue[k]) aw;{<?*
break; ZW`HDrP`
SortUtil.swap(queue,j,k); LIc*tsl
k = j; e1Dj0s?i~K
} !WDn7j'A
} 7E@$}&E
W'8J<VBD
} ;%lJD"yF
HXz iDnj
} }:tAKO=+
1Z=;Uy\
SortUtil： zbdOCfA;
UeC 81*XZ
package org.rut.util.algorithm; LjX&',
N>h]mX6
import org.rut.util.algorithm.support.BubbleSort; 1j8/4:
import org.rut.util.algorithm.support.HeapSort; Cf.WO%?P
import org.rut.util.algorithm.support.ImprovedMergeSort; thR|h+B
import org.rut.util.algorithm.support.ImprovedQuickSort; pPU2ar
import org.rut.util.algorithm.support.InsertSort; +lW+H12
import org.rut.util.algorithm.support.MergeSort; ,(zcl$A[
import org.rut.util.algorithm.support.QuickSort; U5T^S
import org.rut.util.algorithm.support.SelectionSort; ..sJtA8
import org.rut.util.algorithm.support.ShellSort; F\I5fNs@
$XtV8
/** S;G"L$&\
* @author treeroot :ga 9Db9P
* @since 2006-2-2 9iiU,}M`j
* @version 1.0 B>c[Zg1
*/ $v2S;UB v*
public class SortUtil { %!1@aL]pQ
public final static int INSERT = 1; \Or]5ogT'
public final static int BUBBLE = 2; 6uv'r;U]
public final static int SELECTION = 3; X:iG[iU*
public final static int SHELL = 4; %l0_PhAB
public final static int QUICK = 5; Z%(Df3~gmm
public final static int IMPROVED_QUICK = 6; jTGS6{E
public final static int MERGE = 7; BIwgl@t!>
public final static int IMPROVED_MERGE = 8; lU>)n
public final static int HEAP = 9; ci#Zvhtkr
i&? 78+:
public static void sort(int[] data) { S8rW'}XJ=H
sort(data, IMPROVED_QUICK); 89?3,k
} `XFX`1
private static String[] name={ =+kvL2nx-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HQjxJd5P
}; _CYmG"mY
Ej9/_0lt
private static Sort[] impl=new Sort[]{ W\ZV0T;<]
new InsertSort(), IX > j8z[
new BubbleSort(), |sDG>Zq?
new SelectionSort(), T=iZ9w
new ShellSort(), 7l4InR]
new QuickSort(), |~1rKzZwF
new ImprovedQuickSort(), 5+#?7J1
new MergeSort(), 10a=YG
new ImprovedMergeSort(), =2GP^vh
new HeapSort() T% jjs
}; e%5'(V-y,
\ZmFH8=|f
public static String toString(int algorithm){ 98<bF{#0WM
return name[algorithm-1]; h[M6.
} mUe@Dud
o%9Ua9|RR
public static void sort(int[] data, int algorithm) { k1@ A'n
impl[algorithm-1].sort(data); wjw<@A9
} l=<F1Lz
R oF
public static interface Sort { v{\n^|=])
public void sort(int[] data); N23+1h
} B[2h
I=3B 5u
public static void swap(int[] data, int i, int j) { ),W(TL
int temp = data; .jrR4@
data = data[j]; 9, sCJ5bb"
data[j] = temp; V8|q"UX
} 3z{5c
} T5X'D(\|