[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; h+e Oe}
} 3.q%?S}*
int i1=l; YNc]x>
int i2=mid+1; N zY}-:{
for(int cur=l;cur<=r;cur++){ wB6ILTu1
if(i1==mid+1) VUXG%511T
data[cur]=temp[i2++]; w%=GdA=
else if(i2>r) 7XKPC+)1ya
data[cur]=temp[i1++]; )i&z!|/2
else if(temp[i1] data[cur]=temp[i1++]; q\Cg2[nn2
else vn"2"hPF|
data[cur]=temp[i2++]; z?$F2+f&
} YfBb=rN2s
} P-9[,3Zd
v?zA86d_
} >C"f'!oM,j
8X=cGYC#
改进后的归并排序: W=T3spV
BIf E+L(
package org.rut.util.algorithm.support; ;D^%)v/i
%Gp%l
import org.rut.util.algorithm.SortUtil; jEj#|w
~F8M_
/** ta]B9&c
* @author treeroot J+f .r|?
* @since 2006-2-2 %,$Ms?,n`
* @version 1.0 kCkSu-
*/ L(a&,cdh
public class ImprovedMergeSort implements SortUtil.Sort { fMe "r*SU
OU;R;=/]
private static final int THRESHOLD = 10; #:0dqD=
F&US-ce:M
/* "dfq
* (non-Javadoc) (lbF/F>v
* ok;Yxp>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =;DmD?nZ
*/ 85; BS'
public void sort(int[] data) { :5!>h8p;
int[] temp=new int[data.length]; DSGtt/n
mergeSort(data,temp,0,data.length-1); +jzwi3B`
} ;xFx%^M}br
dz fR ^Gv
private void mergeSort(int[] data, int[] temp, int l, int r) { *yJCnoF
int i, j, k; xU$A/!oK
int mid = (l + r) / 2; Df;EemCh
if (l == r) s%h|>l[lKT
return; ?sQOz[ig;
if ((mid - l) >= THRESHOLD) l`9<mL
mergeSort(data, temp, l, mid); utIR\e#:B
else f%n],tE6
insertSort(data, l, mid - l + 1); s*`_Ka57]~
if ((r - mid) > THRESHOLD) lSv?!2
mergeSort(data, temp, mid + 1, r); WP)r5;Hv`
else *Ag</g@ h
insertSort(data, mid + 1, r - mid); y<7C!E#b8
y]|Hrx
for (i = l; i <= mid; i++) { yOKpi&! r
temp = data; ? b;_T,S[
} 4]L5%=atn
for (j = 1; j <= r - mid; j++) { 9kmEg$WM
temp[r - j + 1] = data[j + mid]; 0* Ox>O>
} VC%{qal;q
int a = temp[l]; {)j~5m.,/o
int b = temp[r]; b~;gj^
for (i = l, j = r, k = l; k <= r; k++) { L ]HtmI
if (a < b) { P{YUW~
data[k] = temp[i++]; `#O%ZZ+
a = temp; +"8 [E~Bih
} else { ks92-%;:
data[k] = temp[j--]; 9Q{-4yF9k
b = temp[j]; l1(6*+
} v&t~0jX,
} `Y HnL4
} tHF-OarUO
4to)ff
/** ~)!yl. H
* @param data eqvbDva^
* @param l }^|g|xl!
* @param i #_]/Mr1
*/ >uVo'S.
private void insertSort(int[] data, int start, int len) { }xZR`xP(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SU,S1C_q8
} Ze `=n
} ZAe'lgS
} 9a\H+Y~
} "Zk# bQ2j
OIi8x? .~]
堆排序： -D=J/5L#5
zNAID-5K;
package org.rut.util.algorithm.support; Be~__pd
M::
import org.rut.util.algorithm.SortUtil; Fjnp0:p9X
D~~"wos
/** jb0wP01R
* @author treeroot hw2'.}B"(
* @since 2006-2-2 TcW-pY<N
* @version 1.0 x/BtB"e*5
*/ !VLk|6mn
public class HeapSort implements SortUtil.Sort{ irjOGn
eBlWwUy*6f
/* (non-Javadoc) \<e?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7j,-o
*/ DIsK+1
public void sort(int[] data) { @= E~`
MaxHeap h=new MaxHeap(); (Dat`:
h.init(data); " V[=U13
for(int i=0;i h.remove(); VtP^fM^{
System.arraycopy(h.queue,1,data,0,data.length); KU]co4]8^s
} _#\e5bE=Z
e>$d*~mwn
private static class MaxHeap{ 2/WtOQIB
Cs:?9G
void init(int[] data){ `!Z0;qk
this.queue=new int[data.length+1]; vl`Qz"Xy
for(int i=0;i queue[++size]=data; Oy}^|MFfA
fixUp(size); ddTsR
} -JKl\E
} %*}h{n
UC e{V]T
private int size=0; f-.dL
#!0=I s^
private int[] queue; [Xa,|
lr*p\vH
public int get() { ^cUmLzM
return queue[1]; `e`}dgf0S|
} f:9bq}vH
|2Vhj<6
public void remove() { >^=;b5I2K
SortUtil.swap(queue,1,size--); IdS=lN$
fixDown(1); f};RtRo2
} C6?({ QB@
file://fixdown bI-uF8"
private void fixDown(int k) { +TZVx(Z&A
int j; 0&~JC>S
while ((j = k << 1) <= size) { m >Rdsn~l
if (j < size %26amp;%26amp; queue[j] j++; n#l~B@
if (queue[k]>queue[j]) file://不用交换 9bQD"%ha=d
break; aMJW__,
SortUtil.swap(queue,j,k); p uZY4}b_
k = j; >"q?P^f/
} hS 9^Bi
} 0{OafL8&l
private void fixUp(int k) { * lJkk
while (k > 1) { uv&4 A,h
int j = k >> 1; ,bxGd!&{Q
if (queue[j]>queue[k]) i*]$_\yl"
break; !C;$5(k
SortUtil.swap(queue,j,k); U]]ON6Y&F
k = j; nb\pBl
} :caXQ)
} xV0:K=
N}ugI`:
} ~c=F$M^"c
7<*,O&![|
} DC~1}|B"
V2SHF
SortUtil： w.(?O;
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package org.rut.util.algorithm; KJ7-Vl>
7.*Mmx~]=
import org.rut.util.algorithm.support.BubbleSort; sE])EwZ
import org.rut.util.algorithm.support.HeapSort; ;LC?3.
import org.rut.util.algorithm.support.ImprovedMergeSort; 7fC:'1]G
import org.rut.util.algorithm.support.ImprovedQuickSort; 6IJH%qUx'
import org.rut.util.algorithm.support.InsertSort; Ie[DTy
import org.rut.util.algorithm.support.MergeSort; #0:rBKm,
import org.rut.util.algorithm.support.QuickSort; iOtf7.@
import org.rut.util.algorithm.support.SelectionSort; Ltk-1zhI
import org.rut.util.algorithm.support.ShellSort; R:`)*=rL%
iHT=ROL
/** cAn_:^
* @author treeroot 1pz-jo,2'
* @since 2006-2-2 FEi@MJJ\e
* @version 1.0 AHU=`z
*/ PVSz%"
public class SortUtil { F+]cFx,/
public final static int INSERT = 1; 6lL^/$]
public final static int BUBBLE = 2; bZ#5\L2
public final static int SELECTION = 3; _`.Q7
public final static int SHELL = 4; -6xh
public final static int QUICK = 5; s &f\gp1
public final static int IMPROVED_QUICK = 6; TU*Y?D L
public final static int MERGE = 7; AYAbq}'Yt
public final static int IMPROVED_MERGE = 8; ZA\;9M=
public final static int HEAP = 9; r)Ja\;
VHG}'r9KC%
public static void sort(int[] data) { qFI19`?8E
sort(data, IMPROVED_QUICK); y@<&A~Cl^
} PU4-}!K
private static String[] name={ J(SGaHm@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C%|m[,Gx
}; xX@9wNYD
@SI,V8i
private static Sort[] impl=new Sort[]{ A6 RwLX
new InsertSort(), <`u_O!h
new BubbleSort(), kJ?AAPC
new SelectionSort(), lx7]rkWo|a
new ShellSort(), eCiI=HcW;
new QuickSort(), 03.\!rZZ
new ImprovedQuickSort(), X6BOB?
new MergeSort(), agq4Zy
new ImprovedMergeSort(), :x3xeVtY
new HeapSort() }qR6=J+Dx
}; 1B@7#ozWA?
">5$;{;2r
public static String toString(int algorithm){ OuKRaZ
return name[algorithm-1]; lqmr`\@)
} j<k-w
>I',%v\?@
public static void sort(int[] data, int algorithm) { SXC 7LJm<g
impl[algorithm-1].sort(data); =G !]_d0
} 7GCxd#DJ
'2UQN7@d
public static interface Sort { sLWVgD
public void sort(int[] data); <+<Nsza
} QP<.~^ao
U\!9dhx
public static void swap(int[] data, int i, int j) { IyM:9=}5
int temp = data; Xkk 8#Y":
data = data[j]; Zy.3yQM9i
data[j] = temp; P#V}l'j(<a
} .Hk.'>YR
} :98:U~d1