[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; f0^DsP
} iYyJq;S
int i1=l; G%V*+Ond
int i2=mid+1; uH6QK\
for(int cur=l;cur<=r;cur++){ BpGK`0H
if(i1==mid+1) UqP%S$9
data[cur]=temp[i2++]; %e@Jc3
else if(i2>r) d4h, +OU
data[cur]=temp[i1++]; t&r-;sH^[
else if(temp[i1] data[cur]=temp[i1++]; Q+O3Wgjy
else Ny.s u?E
data[cur]=temp[i2++]; F`3J=AJOJ
} L0Fhjbc
} (oYM}#Q
Z5vpo$l
} YB}p`b42L
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改进后的归并排序: 8mCL3F
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package org.rut.util.algorithm.support; (mOUbO8
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import org.rut.util.algorithm.SortUtil; Mpm#a0f
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/** s5s'$|h"
* @author treeroot Z"# /,?|3@
* @since 2006-2-2 vq df-i
* @version 1.0 X"KX_)GZD
*/ o771q}?&`
public class ImprovedMergeSort implements SortUtil.Sort { Uv(THxVh
SLa\F
private static final int THRESHOLD = 10; 2xchjU-
BJM_kKH
/* oM=Ltxv}
* (non-Javadoc) xJvM l`2;
* 2VNMz[W'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v$O%U[e<
*/ 6NO_S
public void sort(int[] data) { Zz\e:/
int[] temp=new int[data.length]; fR=B/`
mergeSort(data,temp,0,data.length-1); mgB7l0)b
} 8h&Ed=gi
_$+lyea
private void mergeSort(int[] data, int[] temp, int l, int r) { >taC_f06
int i, j, k; #gw ys
int mid = (l + r) / 2; hJ+;N
if (l == r) ;_yp@.,\T
return; l3sL!D1u
if ((mid - l) >= THRESHOLD) -NG`mfu
mergeSort(data, temp, l, mid); BwN65_5p
else =%4vrY `
insertSort(data, l, mid - l + 1); K%) K$/A
if ((r - mid) > THRESHOLD) _?M71>3$.
mergeSort(data, temp, mid + 1, r); PXZZPW/
else d$uh.?F5
insertSort(data, mid + 1, r - mid); dv+)U9at
o;+J3\
for (i = l; i <= mid; i++) { MLL4nkO,`
temp = data; ( aGwe@AS
} 1!@KRV
for (j = 1; j <= r - mid; j++) { Zd/ACZ[
temp[r - j + 1] = data[j + mid]; cG|ihG5)
} MYzyg
int a = temp[l]; N5ityJIgQ
int b = temp[r]; [dje!5Dc(
for (i = l, j = r, k = l; k <= r; k++) { A6APU><dm^
if (a < b) { H0Q.; !^
data[k] = temp[i++]; R"S,&
a = temp; ~aK@M4
} else { Wx;`=9
data[k] = temp[j--]; /7$3RV(
b = temp[j]; .=WsB@+
} KJ Gh)
} Z:l.{3J$
} \}0J%F1
L{K:XiPn
/** {2`:7U~|
* @param data 1M|DaAI
* @param l 4s?x 8oAy
* @param i -r9G5Z!|n
*/ x0ZEVa0`4
private void insertSort(int[] data, int start, int len) { p{knQ],
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ':kj\$U
} 5B[kZ?>
} a'f0Wv0%"
} @za X\
} 26fbBt8nP
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堆排序： S!0ocS!t
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package org.rut.util.algorithm.support; H7 acT
:I(-@2?{
import org.rut.util.algorithm.SortUtil; fmDU
fqaysy
/** 5>J{JW|
* @author treeroot A^PCI*SN[
* @since 2006-2-2 #P,mZ}G\
* @version 1.0 b?#k
*/ /n= %#{
public class HeapSort implements SortUtil.Sort{ iyw"|+
4%Q8>mEvT
/* (non-Javadoc) Sb=cWn P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f n9[Li
*/ q' };.tv
public void sort(int[] data) { |Uz?i7z
MaxHeap h=new MaxHeap(); \Uun2.K
h.init(data); gkdd#Nrk
for(int i=0;i h.remove(); 4qtjP8Zv[
System.arraycopy(h.queue,1,data,0,data.length); 6Sh0%Fs
} &j}\ZD
;eznONNF
private static class MaxHeap{ #4. S2m4
$O*rxQ}
void init(int[] data){ %k8} IBL
this.queue=new int[data.length+1]; a9=,P
for(int i=0;i queue[++size]=data; r2A(GUz
fixUp(size); m2[q*k]AtS
} v~>^c1:
} S$q:hXZ#e
g>h5NrDN
private int size=0; jHPJk8@y
#/'5N|?
private int[] queue; )Yvf9dl
$ig%YB
public int get() { .W{\wkn
return queue[1]; (`}O!;/E}
} .@#i
ShAI6j
public void remove() { WDr'w'
SortUtil.swap(queue,1,size--); ^Z7])arA
fixDown(1); ^7C?yC
} 0Y#S2ty
file://fixdown #87:Or1
private void fixDown(int k) { *S.R#4w
int j; uX*H2"A
while ((j = k << 1) <= size) { %\?2W8Qv_J
if (j < size %26amp;%26amp; queue[j] j++; T)Byws
if (queue[k]>queue[j]) file://不用交换 [xT2c.2__J
break; noiUi>G;:
SortUtil.swap(queue,j,k); 6 flc
k = j; \HFeEEKH
} g+gHIb7{
} (q+U5Ls6
private void fixUp(int k) { 0eY$K7 U
while (k > 1) { *V(TNLIh;
int j = k >> 1; LGq}wxq
if (queue[j]>queue[k]) JFVal#
break; T69'ta32V
SortUtil.swap(queue,j,k); HVzG }r(J
k = j; :&Xy#.un
} CK1Xdyf_S
} Rt{qbM|b&
0}]k>ndT
} p{7"a
\;x+KD
} :70cOt~Z
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SortUtil： SesJg~8
n0#HPI"
package org.rut.util.algorithm; ;wCp j9hir
q:.URl
import org.rut.util.algorithm.support.BubbleSort; E!J;bX5
import org.rut.util.algorithm.support.HeapSort; IpQ51
import org.rut.util.algorithm.support.ImprovedMergeSort; 9aT#7B
import org.rut.util.algorithm.support.ImprovedQuickSort; s }q6@I
import org.rut.util.algorithm.support.InsertSort; AZcWf8
import org.rut.util.algorithm.support.MergeSort; T'2(sHk
import org.rut.util.algorithm.support.QuickSort; SlvQ)jw%
import org.rut.util.algorithm.support.SelectionSort; EeWCy5W
import org.rut.util.algorithm.support.ShellSort; /)?]vKMiI
B3uv>\
/** O G#By6O
* @author treeroot a?%X9 +1A
* @since 2006-2-2 GbG!vo
* @version 1.0 'Syq!=,
*/ O`-JKZc
public class SortUtil { RS@*/.]o
public final static int INSERT = 1; U]Q2EL\%
public final static int BUBBLE = 2; {zhN>n_
public final static int SELECTION = 3; i[)H!%RV*
public final static int SHELL = 4; Dt\F]\6sd
public final static int QUICK = 5; }ex2tkz
public final static int IMPROVED_QUICK = 6; tv,iCV
public final static int MERGE = 7; u(\O
public final static int IMPROVED_MERGE = 8; a2fV0d6*l
public final static int HEAP = 9; *,!6#Z7
+9>t; Ty
public static void sort(int[] data) { 2w93 ~j
sort(data, IMPROVED_QUICK); 'Uqz,
} R+IT)2
private static String[] name={ :.Vn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XEMi~L+
}; n?vrsqmZ
h_L-M}{OG
private static Sort[] impl=new Sort[]{ |RX uO
new InsertSort(), lCg'K(|"
new BubbleSort(), e"P>b? OY
new SelectionSort(), ,o\vumx
new ShellSort(), W>036
new QuickSort(), c*ac9Y'o
new ImprovedQuickSort(), zuR!,-W
new MergeSort(), >lxhXYp
new ImprovedMergeSort(), HjUs}#</
new HeapSort() k,O("T[
}; bCHA!zO
~=i9]%g?
public static String toString(int algorithm){ ~7T]l1]W%
return name[algorithm-1]; VqLqj$P
} ;_)&#X,?(
#:v}d+
public static void sort(int[] data, int algorithm) { JX@/rXFY}
impl[algorithm-1].sort(data); 37Vs9w
} ^B~z .F i
g|8G!7O
public static interface Sort { jV`xRjh
public void sort(int[] data); HYf&0LT<11
} 0t?:
}7E2,A9_"
public static void swap(int[] data, int i, int j) { GL'zs8AKf
int temp = data; yhg^1l|t,
data = data[j]; 0dA'f0Uy\X
data[j] = temp; 77"'?
} zl\mBSBx"
} (gZKR2hO