[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; o,CBA;{P
} L?!$EPr
int i1=l; rJu[N(2k
int i2=mid+1; "Nbos.a]5
for(int cur=l;cur<=r;cur++){ Z| We9%
if(i1==mid+1) !Cw!+fZ\l
data[cur]=temp[i2++]; \/!ZA[D|E\
else if(i2>r) <P1rqM9^
data[cur]=temp[i1++]; 2B^~/T<\
else if(temp[i1] data[cur]=temp[i1++]; R*087X7 N|
else 8x9Rm
data[cur]=temp[i2++]; lX"bN=E?!
} sTkIR5Z
} ;1v=||V
I~)cYl:|G
} &&WDo(r3
H)E^!eo
改进后的归并排序: IV0[!D
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package org.rut.util.algorithm.support; 8W;2oQN7
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import org.rut.util.algorithm.SortUtil; Ox^:)ii
3YW=||;|Yg
/** ym\(PCa5`
* @author treeroot -ui<E?v
* @since 2006-2-2 .]P2}w)x?
* @version 1.0 oU8>Llt=$
*/ u_LY\'n
public class ImprovedMergeSort implements SortUtil.Sort { ACb/ITu
&1_U1
private static final int THRESHOLD = 10; FPF6H puV
[![ G7H%f
/* EWA;L?g|A
* (non-Javadoc) .5.8;/ /
* 'seyD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qgx?"$ Z
*/ :6Pnie
public void sort(int[] data) { >Q=Ukn;k
int[] temp=new int[data.length]; Rn-G @}f
mergeSort(data,temp,0,data.length-1); 1}}>Un`U5,
} dAL3.%
{^J!<k,R\;
private void mergeSort(int[] data, int[] temp, int l, int r) { ]dG\j^e|
int i, j, k; z1vw'VT>
int mid = (l + r) / 2; Ql &0O27
if (l == r) 'z5h3J
return; \vCGU>UY
if ((mid - l) >= THRESHOLD) \gItZ}+c4}
mergeSort(data, temp, l, mid); i.y=8GxY
else .%'Z~|K4
insertSort(data, l, mid - l + 1); 4PWAGuN^
if ((r - mid) > THRESHOLD) @A{m5h
mergeSort(data, temp, mid + 1, r); j)Y[4 ^k^
else gRAC d&)
insertSort(data, mid + 1, r - mid); ` H XEZ|
e3v5,.
for (i = l; i <= mid; i++) { vc8?I."?
temp = data; ong""K4H
} 3?.1nGu
for (j = 1; j <= r - mid; j++) { s]H^wrg&
temp[r - j + 1] = data[j + mid]; %ucjMa>t
} \G>ZkgU
int a = temp[l]; iY~rne"l
int b = temp[r]; O4L#jBa+
for (i = l, j = r, k = l; k <= r; k++) { 5wT>N46UX
if (a < b) { }mZVL~|V
data[k] = temp[i++]; yfEb
a = temp; W%o|0j\1GU
} else { cSK&[>i)4
data[k] = temp[j--]; 0y~<%`~
b = temp[j]; .VM3D0aV
} ghAi{@s$)
} Hx2En:^Gf
} =P`~t<ajB
\:v$ZEDJ>
/** %}&(h/= e
* @param data S&(^<gwl
* @param l ^$-Ye]<
* @param i r?A|d.Tl
*/ \.#p_U5In
private void insertSort(int[] data, int start, int len) { A&,,9G<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]|U-y645
} ECcZz.
} l&W;b6L
} y3eHF^K+$
} KrcgIB8X
A6{b?aQ
堆排序： B=X,7
V&ot3- Rf
package org.rut.util.algorithm.support; C$9z
fD4ICO@
import org.rut.util.algorithm.SortUtil; 0Fw6Dq<8-!
`f9gC3Hk
/** &aG*k*
* @author treeroot BqH]-'1G
* @since 2006-2-2 c</1
* @version 1.0 qAY%nA>jO
*/ gSt`%
public class HeapSort implements SortUtil.Sort{ uD9|.P}
*7$P]
/* (non-Javadoc) F|+W.9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xW_yLbE
*/ <rIz Z'D
public void sort(int[] data) { /6+NU^
MaxHeap h=new MaxHeap(); @|\R}k%(
h.init(data); Uxu\u0*
for(int i=0;i h.remove(); E9}{1A
System.arraycopy(h.queue,1,data,0,data.length); 8VQ 24r
} x\\~SGd
$uj(G7_
private static class MaxHeap{ a9U_ug58
)92r{%N
void init(int[] data){ o[1ylzk}+
this.queue=new int[data.length+1]; 8K"+,s(%R
for(int i=0;i queue[++size]=data; bKDA!R2
fixUp(size); o "z@&G" ^
} dy>!KO
} TDtAmk
]N{0:Va@D
private int size=0; Anm=*;*M`
%|"g/2sF[G
private int[] queue; k\`S lb1
:6{`~=
public int get() { )|bC^{kH!l
return queue[1]; a W%5~3
} fJAnKUF)
\qh*E#j
public void remove() { ^aZAw%K
SortUtil.swap(queue,1,size--); >~nF=
fixDown(1); 58tVx'1y
} #Q"O4 b:8
file://fixdown w ej[+y-
private void fixDown(int k) { %A/_5;PZ/
int j; 1|r,dE2k9
while ((j = k << 1) <= size) { sTRJ:fR
if (j < size %26amp;%26amp; queue[j] j++; O) atNE
if (queue[k]>queue[j]) file://不用交换 ;]sYf
break; ``U^COD
SortUtil.swap(queue,j,k); mLk(y*
k = j; @A<PkpNL
} tw=oH9c80
} lfZ04M{2
private void fixUp(int k) { gB'fFkd
while (k > 1) { M]]pTU((
int j = k >> 1; #/2$+x
if (queue[j]>queue[k]) !h[VUg_8
break; &opd2
SortUtil.swap(queue,j,k); n(seNp%_
k = j; c]-*P7W
} )!BsF'uVQ
} SQ*k =4*r
4LH[4Yj?`
} e4>"92hX
*hLQ
} {LHR!~d}5f
(~~w7L s
SortUtil： "es?=
4NN$( S-W
package org.rut.util.algorithm; mEyK1h1G@
4QOEw-~w&s
import org.rut.util.algorithm.support.BubbleSort; An*~-u9m
import org.rut.util.algorithm.support.HeapSort; C'yppl%
import org.rut.util.algorithm.support.ImprovedMergeSort; \%Ves@hG>
import org.rut.util.algorithm.support.ImprovedQuickSort; C)'q QvA
import org.rut.util.algorithm.support.InsertSort; uc7Eq45
import org.rut.util.algorithm.support.MergeSort; /H7&AiA
import org.rut.util.algorithm.support.QuickSort; 0& >H^
import org.rut.util.algorithm.support.SelectionSort; (Rt7%{*
import org.rut.util.algorithm.support.ShellSort; ".^VI2T
'H5M|c$s
/** DGW+>\G
* @author treeroot ;5-r_D;9
* @since 2006-2-2 @fv}G>t
* @version 1.0 [r+ZE7$2b"
*/ zZcnijWb
public class SortUtil { $$b 9&mTl#
public final static int INSERT = 1; [/s&K{+c
public final static int BUBBLE = 2; p'7*6bj1
public final static int SELECTION = 3; o8e?J\?
public final static int SHELL = 4; n1 6 `y}
public final static int QUICK = 5; 0Wa}<]:^
public final static int IMPROVED_QUICK = 6; ~qe%Yq
public final static int MERGE = 7; 7dsefNPb
public final static int IMPROVED_MERGE = 8; 8 C[/dH
public final static int HEAP = 9; ,p(<+6QZ
76hOB@
public static void sort(int[] data) { 3rLTF\
sort(data, IMPROVED_QUICK); HbP!KVHyk1
} s,#>m*Rh
private static String[] name={ <)+y=m\eJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ljl^ GFo
}; `.s({/|[
z'T)=ycT
private static Sort[] impl=new Sort[]{ Zo1,1O
new InsertSort(), ;XM{o:1Y[
new BubbleSort(), F}Vr:~
new SelectionSort(), 2'=T[<nNB
new ShellSort(), ifN64`AhRX
new QuickSort(), uqz]J$
new ImprovedQuickSort(), }D+}DPL{^
new MergeSort(), g&/T*L
new ImprovedMergeSort(), iq( )8nxi
new HeapSort() 6aM*:>C"
}; rZ8`sIWQt
*m?/O}R
public static String toString(int algorithm){ bfo["
return name[algorithm-1]; lHgs;>U$
} rE@T79"
=zQN[
public static void sort(int[] data, int algorithm) { ;WR,eI..
impl[algorithm-1].sort(data); q, O$ %-70
} g}@OUG"D
YPHS1E?
public static interface Sort { 2UGsYQn
public void sort(int[] data); 2eMTxwt*S
} J!5$,%v
J:V?EE,\-
public static void swap(int[] data, int i, int j) { jy-{~xdg[
int temp = data; >/|q:b^2r
data = data[j]; /SYw;<=
data[j] = temp; x.S3Zi}=
} M4as
} f^W;A"+