[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; TeXt'G=M
} /lqVMlz\77
int i1=l; n,vs(ZL:
int i2=mid+1; ?X5Y8n]y\h
for(int cur=l;cur<=r;cur++){ 6<>T{2b:(p
if(i1==mid+1) 1xsIM'&
data[cur]=temp[i2++]; s%xhT
else if(i2>r) ##_Jz5P
data[cur]=temp[i1++]; 6L4<c+v_
else if(temp[i1] data[cur]=temp[i1++]; B?pNF+?'z
else T**v!Ls
data[cur]=temp[i2++]; 4Ow0g-{
} IqrT@jgN-
} z [9f
w0(1o_F7.
} ;eQOBGX9
(m%A>e B
改进后的归并排序: Htn''adg5
i?0+f}5<p
package org.rut.util.algorithm.support; k/]4L!/ T
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import org.rut.util.algorithm.SortUtil; e|2@z-Sp-
RP|/rd]-k
/** \#O}K
* @author treeroot Q-7C'|
* @since 2006-2-2 B;=-h(E}vJ
* @version 1.0 f9FEH7S68
*/ Fh0cOp(
public class ImprovedMergeSort implements SortUtil.Sort { waRK$/b (
^Pp2T
private static final int THRESHOLD = 10; S%{^@L+V
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/* &upM,Jsr*
* (non-Javadoc) CYFi_6MFl
* /t"FZ#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O4lHR6M2
*/ (]gd$BgD
public void sort(int[] data) { :+*q,lX8
int[] temp=new int[data.length]; TVs#,
mergeSort(data,temp,0,data.length-1); }XcYIo#+t
} T_3JAH e
yDe6f(D
private void mergeSort(int[] data, int[] temp, int l, int r) { r)xkpa5
int i, j, k; +$y%H
int mid = (l + r) / 2; MIF`|3$,
if (l == r) "J(0J
return; D6L5X/#
if ((mid - l) >= THRESHOLD) .0]\a~x
mergeSort(data, temp, l, mid); 6zR9(c:a~
else 97 eEqI$#
insertSort(data, l, mid - l + 1); x4=Sm0Ro|V
if ((r - mid) > THRESHOLD) *3Qwmom
mergeSort(data, temp, mid + 1, r); oQ:.pq{T
else su\iUi
insertSort(data, mid + 1, r - mid); ;%W]b
YkuFt>U9,
for (i = l; i <= mid; i++) { 7G]v(ay
temp = data; vnr{Ekg
} ewrs D'?
for (j = 1; j <= r - mid; j++) { x,81#=m^h
temp[r - j + 1] = data[j + mid]; ::`#qa4!
} $LkTu
int a = temp[l]; 734f&2
int b = temp[r]; 0s'h2={iI
for (i = l, j = r, k = l; k <= r; k++) { (2uF<$7(
if (a < b) { "kS!rJ[
data[k] = temp[i++]; s:ZYiZ-
a = temp; k3yA*Ec
} else { `WRM7
data[k] = temp[j--]; $s.:H4:I
b = temp[j]; j0`)mR}
} K6d2}!5
} tPqWe2
} =`pH2SJT
='G-wX&k
/** 3LW_qX
* @param data 0aM&+j\q}
* @param l rHaj~s 4
* @param i )sZJH9[K
*/ !%X#;{
private void insertSort(int[] data, int start, int len) { =8V 9E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \@!"7._=
} hH(w O\s
} Nbvs_>N
} |w].*c}Z
} #T3dfVWv
KBOp}MEz
堆排序： !*G%vOa
N(Sc!rX
package org.rut.util.algorithm.support; +oevNM
\`U=pZJ
import org.rut.util.algorithm.SortUtil; N> jQe
C116c"
/** j@u]( nf
* @author treeroot vN9R.R
* @since 2006-2-2 cMK}BHOC
* @version 1.0 U-U"RC>
*/ /P%OXn$i/
public class HeapSort implements SortUtil.Sort{ 5_7y1
Aw$+Ew[8 2
/* (non-Javadoc) [jEZ5]%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iu.v8I;<
*/ B? Z_~Bf&
public void sort(int[] data) { 9T#${NK
MaxHeap h=new MaxHeap(); Lm3~< vP1e
h.init(data); vdIert?p
for(int i=0;i h.remove(); ? FlQ\q
System.arraycopy(h.queue,1,data,0,data.length); %urd;h D
} VjLv{f<p
[nASMKK0
private static class MaxHeap{ !9t,#?!
WCD)yTg:ES
void init(int[] data){ z50P* eS
this.queue=new int[data.length+1]; 2!Qg1hM
for(int i=0;i queue[++size]=data; Xti.yQx\
fixUp(size); iY*fp=c9
} Y*/e;mG.
} LU $=j
b.j$Gna>Q
private int size=0; dym K@
}0V aZ<j
private int[] queue; 4w5);x.
#w@V!o
public int get() { Qo~|[]GE
return queue[1]; Ggk#>O G
} `0, G'F
t>!Ok
public void remove() { mg]t)+PQ
SortUtil.swap(queue,1,size--); i_(6}Y&
fixDown(1); |=js!R|
} Ozg,6&3ji
file://fixdown N 9W,p2
private void fixDown(int k) { fSVb.MZa7
int j; _9C,N2a{C
while ((j = k << 1) <= size) { B~B,L*kC2
if (j < size %26amp;%26amp; queue[j] j++; 0bG#'.-
if (queue[k]>queue[j]) file://不用交换 8b!xMFF"
break; }jg1..)"<
SortUtil.swap(queue,j,k); N*+L'bO
k = j; OcLahz6
} )G),iy
} F0kdwN4;
private void fixUp(int k) { k+BY3a
while (k > 1) { ]P/i}R:
int j = k >> 1; #>M^BOR8
if (queue[j]>queue[k]) K7R!E,oPg
break; I0*N "07n
SortUtil.swap(queue,j,k); X-*LA*xbN
k = j; fjCFJ_
} Ya4yW9*
} #mYe@[p@
UD=[::##
} qP0UcG
D"gv:RojD
} C8W_f( i~
xXlx}C
SortUtil： f0879(,i
U(gYx@
package org.rut.util.algorithm; (mplo|>
~O~iP8T
import org.rut.util.algorithm.support.BubbleSort; EW`3$J;
import org.rut.util.algorithm.support.HeapSort; 5"y)<VLJX
import org.rut.util.algorithm.support.ImprovedMergeSort; CG;+Z-"X
import org.rut.util.algorithm.support.ImprovedQuickSort; K~4bT=
import org.rut.util.algorithm.support.InsertSort; + }$(j#h
import org.rut.util.algorithm.support.MergeSort; 0V?7'Em
import org.rut.util.algorithm.support.QuickSort; U1`pY:P
import org.rut.util.algorithm.support.SelectionSort; 9k\M<jA
import org.rut.util.algorithm.support.ShellSort; *cZ7?
M@JW/~p'
/** nDcH;_<;9a
* @author treeroot h$mGawvZ~
* @since 2006-2-2 PhAD:A
* @version 1.0 \l%##7DRp]
*/ a6@k*9D>
public class SortUtil { jvxCCYXR
public final static int INSERT = 1; &kcmkRRG
public final static int BUBBLE = 2; RxS{
public final static int SELECTION = 3; E 6+ ooB[
public final static int SHELL = 4; P%ThW9^vnj
public final static int QUICK = 5; >;lrH&
public final static int IMPROVED_QUICK = 6; -24ccN;
public final static int MERGE = 7; M3Qi]jO98
public final static int IMPROVED_MERGE = 8; -/ G#ls|?
public final static int HEAP = 9; `n@;%*6/
hXvC>ie(i
public static void sort(int[] data) { cc3/XBo
sort(data, IMPROVED_QUICK); T9'HQu
} &O#1*y Z
private static String[] name={ )?I*zc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cltx(C>
}; ;VEKrVD
*CbV/j"P?
private static Sort[] impl=new Sort[]{ _[Sh`4`r
new InsertSort(), _2)QL
new BubbleSort(), a_]l?t
new SelectionSort(), #2lvRJB
new ShellSort(), +=d=
new QuickSort(), 11k}Ly
new ImprovedQuickSort(), HGDiwA
new MergeSort(), =p7id5"
new ImprovedMergeSort(), XL9-N?(@
new HeapSort() fQwLx
}; t BG 9Mn
;JMmr-@
public static String toString(int algorithm){ \j-:5M#m
return name[algorithm-1]; ?G<?:/CU
} m.\JO
=diGuIB
public static void sort(int[] data, int algorithm) { rg=Ym.
impl[algorithm-1].sort(data); 4?+jvVq
} aL&9.L|1g
NTO.;S|2%
public static interface Sort { ]>ndFE6kl
public void sort(int[] data); dc_2nF
} g_!xD;0
)]LP8 J&
public static void swap(int[] data, int i, int j) { /{P-WRz>
int temp = data; keG\-f
data = data[j]; Dd,i^,4Gj
data[j] = temp; -1~o~yGE
} UI'fzlB
} Ino]::ZJ/