[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; [l+1zt0w0
} F5CV<-jB
int i1=l; 0G(T'Z1
int i2=mid+1; +^St"GWY
for(int cur=l;cur<=r;cur++){ {9 >jWNx
if(i1==mid+1) @K 8sNPK
data[cur]=temp[i2++]; d83K;Ryd
else if(i2>r) zc<C %t[~y
data[cur]=temp[i1++]; !MOgM
else if(temp[i1] data[cur]=temp[i1++]; >L#HE
else \O"EK~x}/
data[cur]=temp[i2++]; kf3yJP/
} W$x'+t5H
} H3=U|wr|
UB3b
} $K)9(DD
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改进后的归并排序: uvo2W!
#+2|ZfCn%
package org.rut.util.algorithm.support; wvAXt*R
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import org.rut.util.algorithm.SortUtil; '_z#}P<
~-+lZ4}
/** %ZF6%m0S
* @author treeroot g-c\;
* @since 2006-2-2 HvWnPh1l
* @version 1.0 rPV\ F
*/ Pg3O )D9
public class ImprovedMergeSort implements SortUtil.Sort { fP41B
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private static final int THRESHOLD = 10; *o8DfZ
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/* Nz+Jf57t
* (non-Javadoc) EUvxil
* b|i94y(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zOR
*/ <r*A(}Y
public void sort(int[] data) { 33O@jbs@
int[] temp=new int[data.length]; /aepE~T
mergeSort(data,temp,0,data.length-1); l<7)uO^8
} MB,;HeP!
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private void mergeSort(int[] data, int[] temp, int l, int r) { ,!"\L~6
int i, j, k; Z8??+d=
int mid = (l + r) / 2; mlgw0
if (l == r) ?]S!-6:
return; '1{#I/P;
if ((mid - l) >= THRESHOLD) sjLI^#a
mergeSort(data, temp, l, mid); :@6,|2be=
else h"S+8Y:1{k
insertSort(data, l, mid - l + 1); `[JX}<~i
if ((r - mid) > THRESHOLD) Re <G#*^
mergeSort(data, temp, mid + 1, r); M[ea!an
else *$nz<?
insertSort(data, mid + 1, r - mid); 4_3 DQx9s
y0Pr[XZ
for (i = l; i <= mid; i++) { gB!K{ Io'
temp = data; m:77pE&o
} @g*=xwve=~
for (j = 1; j <= r - mid; j++) { f`X#1w9
temp[r - j + 1] = data[j + mid]; &xF 2!t`
} dU]>
int a = temp[l]; gt3;Xi
int b = temp[r]; >pKu G#
for (i = l, j = r, k = l; k <= r; k++) { Zy2@1-z6
if (a < b) { Dm':D
data[k] = temp[i++]; SSANt?\Z<
a = temp; w, u`06
} else { [c@14]e
data[k] = temp[j--]; }hOExTz
b = temp[j]; 3AWNoXh
} |C9qM
} 9,|&+G$
} L3M]06y
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/** DCfV
* @param data ,*fvA?
* @param l EQ&E C
* @param i <tZPS`c'_
*/ 1MdVWFKXV
private void insertSort(int[] data, int start, int len) { \*#9Ry^f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UOrfwK
} jP6;~[rl
} .^^YS$%%7
} ;|v6^2H"
} ]*+ozAG4
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堆排序： zmI?p4,
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package org.rut.util.algorithm.support; `, ?T;JRc
!*wK4UcX"
import org.rut.util.algorithm.SortUtil; b'Gn)1NE
6KmF 9
/** kW&{0xkGR
* @author treeroot <o5+*X
* @since 2006-2-2 rm*Jo|eH`
* @version 1.0 $l:?(&u
*/ $smzP.V
public class HeapSort implements SortUtil.Sort{ -`6O(he
<Tr_,Ya{9
/* (non-Javadoc) 7~[1%`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 Yq|Z
*/ zO`54^
public void sort(int[] data) { u]P0:)tS.
MaxHeap h=new MaxHeap(); STp}?Cb
h.init(data); VIL #q
for(int i=0;i h.remove(); Ml8'=KN_
System.arraycopy(h.queue,1,data,0,data.length); ANh5-8y
} >\b=bT@iM
=)C}u6
private static class MaxHeap{ ( q^umw
W`],
void init(int[] data){ 8Pklw^k
this.queue=new int[data.length+1]; RRy3N )HR
for(int i=0;i queue[++size]=data; Fs7/3
fixUp(size); >G<AyS&z*
} zH8l-0I+$
} JZ&]"12]fR
DUiqt09`~
private int size=0; fL4F ~@`9l
=8 d`qS"
private int[] queue; ):C4"2l3
}' `2C$
public int get() { A(#hyb#
return queue[1]; .H+`]qLkL
} 6/9 A'!4C
aX6.XHWbDf
public void remove() { NL))!Pi
SortUtil.swap(queue,1,size--); &;7\/m*W1
fixDown(1); ( B$;'U<
} o Wg5-pMWZ
file://fixdown Nzz" w_#
private void fixDown(int k) { uj_uj!
int j; r?d601(fa
while ((j = k << 1) <= size) { 6l IFxc
if (j < size %26amp;%26amp; queue[j] j++; M")v ph^
if (queue[k]>queue[j]) file://不用交换 @#ih;F
break; 39?iX'*p
SortUtil.swap(queue,j,k); PL<q|y
k = j; *nDyB.(
} f+Nq?GvwBQ
} CDei+ q
private void fixUp(int k) { iUqL /
while (k > 1) { >:5/V0;,
int j = k >> 1; AEm?g$a
if (queue[j]>queue[k]) ;5-Sn(G
break; kc `Q- N}
SortUtil.swap(queue,j,k); nn$,|/
k = j; D %~s
} >1xlP/4jx
} he&*N*of:
M~;Ww-./
} hRSRz5 J}
YSk,kU
} <T:u&Ic
OUn,URI
SortUtil： R@t?!`f!+
UO8#8
package org.rut.util.algorithm; Z2`(UbG}
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import org.rut.util.algorithm.support.BubbleSort; u*Eb4
import org.rut.util.algorithm.support.HeapSort; /r Zj=
import org.rut.util.algorithm.support.ImprovedMergeSort; UceZWtYa
import org.rut.util.algorithm.support.ImprovedQuickSort; C/ow{MxA
import org.rut.util.algorithm.support.InsertSort; 30g-J(Zg
import org.rut.util.algorithm.support.MergeSort; )Z0pU\
import org.rut.util.algorithm.support.QuickSort; <oTIzj7f
import org.rut.util.algorithm.support.SelectionSort; `TKe+oS)
import org.rut.util.algorithm.support.ShellSort; a/X@5kr{
"#d}S)GlXM
/** I :%(nKBK
* @author treeroot em<(wJ-Y
* @since 2006-2-2 ^.Vq0Qzy]
* @version 1.0 z+&mMP`-
*/ ?n>h/[/
public class SortUtil { AM*V4}s*9k
public final static int INSERT = 1; i3s-l8\\z
public final static int BUBBLE = 2; FSd842O
public final static int SELECTION = 3; rC}r99Pe:x
public final static int SHELL = 4; 6~V$0Y>]
public final static int QUICK = 5; YY{S0jnhF
public final static int IMPROVED_QUICK = 6; Gr&5 mniu
public final static int MERGE = 7; bTE%p0
public final static int IMPROVED_MERGE = 8; [GZ%K`wx
public final static int HEAP = 9; z'3
2Q,e1'=
public static void sort(int[] data) { M?x/C2|
sort(data, IMPROVED_QUICK); |2AK~t|t
} j%Y`2Ra
private static String[] name={ i}N'WV`!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ([iMOE[D3
}; `Q^G k{9P
>%x7-->IB
private static Sort[] impl=new Sort[]{ ] 7_ f'M1F
new InsertSort(), "zJ1vIZY
new BubbleSort(), _/MHi-]/.
new SelectionSort(), 8-UlbO6
new ShellSort(), wlKfTJrn&
new QuickSort(), G+[hE|L~y
new ImprovedQuickSort(), Vq2d+ ,fb
new MergeSort(), E(*RtOC<W
new ImprovedMergeSort(), QNJ )HNLp
new HeapSort() _CDUUr
}; i5w
XLz>h(w=
public static String toString(int algorithm){ ihBlP\C
return name[algorithm-1]; i&$L$zf,
} Zm!T4pL
)8p FPr
public static void sort(int[] data, int algorithm) { fB|rW~!v
impl[algorithm-1].sort(data); cU?A|'
} bEyZRG
eaCv8zdX
public static interface Sort { AK%`EsI^
public void sort(int[] data); l_5]~N
} *=mtt^yZ
8-3]Bm!
public static void swap(int[] data, int i, int j) { 9^QiFgJy
int temp = data; iyAeR!`
data = data[j]; DXl3
data[j] = temp; <XiHQ B!
} e82SG8#]
} thIuK V{CO