[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; yV=Ku
} p=F!)TnJN
int i1=l; yo\R[i(
int i2=mid+1; 5,/rh,?
for(int cur=l;cur<=r;cur++){ 3m RP.<=
if(i1==mid+1) Dep.Qfv{-
data[cur]=temp[i2++]; tHF-OarUO
else if(i2>r) ~>C@n'\lv
data[cur]=temp[i1++]; hY$gzls4
else if(temp[i1] data[cur]=temp[i1++]; L?~>eT
else 12 y=Eh
data[cur]=temp[i2++]; FT.6^)-
} }DH3_M!
} }^|g|xl!
uTsxSkHb/
} {Ju
Z(Styn/x
改进后的归并排序: a?Q\nu1
R*Jnl\?>@
package org.rut.util.algorithm.support; K9{3,!1
aYTVYg
import org.rut.util.algorithm.SortUtil; ^L}ICm_#
a]0B{
/** @.IGOh
* @author treeroot w>-@h>Ln
* @since 2006-2-2 [ .]xy
* @version 1.0 p mv6m
*/ 0,1x- yD
public class ImprovedMergeSort implements SortUtil.Sort { HEqTlnxUu
R8[l\Y>Ec
private static final int THRESHOLD = 10; !O;su~7
Q;9-aZ.H
/* C\%T|ZDE
* (non-Javadoc) #G</RYM~m
* xBba&A]=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [k1N-';;;
*/ h"~i&T h
public void sort(int[] data) { m9yi:zT%
int[] temp=new int[data.length]; ?'RB)M=Og7
mergeSort(data,temp,0,data.length-1); N=Q<mj;,
} 9f UD68Nob
Q]44A+M]
private void mergeSort(int[] data, int[] temp, int l, int r) { 2xPkQOj3
int i, j, k; _=%F6}TE
int mid = (l + r) / 2; Eb 8vnB#
if (l == r) s &4k
return; ?= G+L0t
if ((mid - l) >= THRESHOLD) ie<zc+*rW
mergeSort(data, temp, l, mid); tX'`4!{@+
else a1^CpeG~
insertSort(data, l, mid - l + 1); h%4aL38
if ((r - mid) > THRESHOLD) \!O3]k,r
mergeSort(data, temp, mid + 1, r); UA>3,|gV1
else i}&&rr
insertSort(data, mid + 1, r - mid); P{T\zT
}kJfTsFS
for (i = l; i <= mid; i++) { n~c<[
temp = data; E[Xqyp!<
} 0.pZlv
for (j = 1; j <= r - mid; j++) { SB1j$6]OR7
temp[r - j + 1] = data[j + mid]; ;_$Q~X
} @= E~`
int a = temp[l]; E[$"~|7|$
int b = temp[r]; `'W/uCpl
for (i = l, j = r, k = l; k <= r; k++) { [z:.52@!
if (a < b) { HgGwV;W
data[k] = temp[i++]; *lZ;kW(}p
a = temp; ^pB}eh.@U
} else { fL xGaOT
data[k] = temp[j--]; !sknO53`H`
b = temp[j]; D.[h`Hkc
} s<z`<^hRe
} tLH:'"{zx
} @euH[<
K#"J8h;x
/** uez"{_I
* @param data b]0]*<~y
* @param l LDDgg u
* @param i 9f(0 qa
*/ DB~3(r?K
private void insertSort(int[] data, int start, int len) { +N6IdDN3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bk(q8xR`
} L/J1;
} 5taR[ukM
} %*}h{n
} h+gaKh=k+
N_:H kI6
堆排序： bA_/6r)u
%IA1Y>`
package org.rut.util.algorithm.support; }4uHT.)
v9,<2
import org.rut.util.algorithm.SortUtil; H^Mfj!S
5VS};&f
/** Ie<H4G5Vh
* @author treeroot T\ *#9a
* @since 2006-2-2 A ".v+
* @version 1.0 @d&JtA
*/ TS_5R>R3
public class HeapSort implements SortUtil.Sort{ f:9bq}vH
`w6*(t:T
/* (non-Javadoc) (HEi;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3 as~yF0
*/ u1}/SlCp
public void sort(int[] data) { K N Y
MaxHeap h=new MaxHeap(); )_&P:;N
h.init(data); ndmsXls
for(int i=0;i h.remove(); o5@d1A
System.arraycopy(h.queue,1,data,0,data.length); Z bW!c1s{
} bcR";cE
]/9@^D}&
private static class MaxHeap{ x/pX?k
B_uhNLd
void init(int[] data){ /~(T[\E<
this.queue=new int[data.length+1]; J9%I&lu/
for(int i=0;i queue[++size]=data; {xD\w^
fixUp(size); A=Y A#0
} ;tJ}*!z W
} 8|LU=p`y'
QO/nUl0E
private int size=0; !.G knDT
cMfJq}C<
private int[] queue; 3jqV/w[-
#0"Pd8@
public int get() { e**<et.
return queue[1]; *g*~+B :
} 6`h}#@ (
FUP0X2P
public void remove() { *@VS^JB
SortUtil.swap(queue,1,size--); )krBjF.$
fixDown(1); B,q)<z6<
} DL*&e|:q
file://fixdown qyKI.X3n*
private void fixDown(int k) { *|9:
int j; !b"2]Qv
while ((j = k << 1) <= size) { w t6&N{@
if (j < size %26amp;%26amp; queue[j] j++; 0{OafL8&l
if (queue[k]>queue[j]) file://不用交换 %p(X*mVX
break; ~eyZH8&
SortUtil.swap(queue,j,k); ,/YTW@N
k = j; ~eZ]LW])
} s$JO3-)
} {/|tVc63
private void fixUp(int k) { ;=UkTn}N?l
while (k > 1) { z',f'3+
int j = k >> 1; xrZzfg
if (queue[j]>queue[k]) hAV@/oQ
break; *`_2uBz
SortUtil.swap(queue,j,k); BMo2t'L
k = j; H -K%F_#
} [ KDNKK
} Z?<&@YQS
uhm3}mWv
} h:AB`E1
(Fj"<
} a)8;P7
0<XxR6w
SortUtil： <74r
V}MRdt7
package org.rut.util.algorithm; Qp;FVUw9
;04< 9i
import org.rut.util.algorithm.support.BubbleSort; nh]HEG0CZJ
import org.rut.util.algorithm.support.HeapSort; ;lQ>>[*
import org.rut.util.algorithm.support.ImprovedMergeSort; hRNnj
import org.rut.util.algorithm.support.ImprovedQuickSort; sd _DG8V
import org.rut.util.algorithm.support.InsertSort; 7.*Mmx~]=
import org.rut.util.algorithm.support.MergeSort; &u4;A[-R
import org.rut.util.algorithm.support.QuickSort; #=T^XHjQ
import org.rut.util.algorithm.support.SelectionSort; "?G?G'yK>
import org.rut.util.algorithm.support.ShellSort; 2xBYJoF(
U;=1v:~d
/** <2e[;$
* @author treeroot eUKl(
* @since 2006-2-2 3>6rO4,
* @version 1.0 FOAXm4"
*/ 4$y P_3
public class SortUtil { Yy{(XBJ~%t
public final static int INSERT = 1; KRM:h`+-.-
public final static int BUBBLE = 2; n#5S-z1KNw
public final static int SELECTION = 3; Os/?iGlD*E
public final static int SHELL = 4; n}dLfg*
public final static int QUICK = 5; $T6+6<
public final static int IMPROVED_QUICK = 6; )SHB1U25{
public final static int MERGE = 7; !mZWd'
public final static int IMPROVED_MERGE = 8; t2,?+q$x
public final static int HEAP = 9; e8eNef L$
< w;490g
public static void sort(int[] data) { P}"T3u\N
sort(data, IMPROVED_QUICK); (sSGJS'X
} FY)US>
private static String[] name={ X4JSI%E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3$9V4v@2
}; 2v<O}
)S`=y-L$
private static Sort[] impl=new Sort[]{ 7$v_#ZE.H
new InsertSort(), bs'hA@r
new BubbleSort(), XM)
new SelectionSort(), 5FE&
new ShellSort(), f#\Nz>tOhE
new QuickSort(), A*{CT>
new ImprovedQuickSort(), +`ug?`_
new MergeSort(), hGcu(kAC,
new ImprovedMergeSort(), 9TZ6c
new HeapSort() eVzZfB-=4}
}; r%9=75HA
Wjli(sT#-
public static String toString(int algorithm){ $|N\(}R
return name[algorithm-1]; ?ph>:M
} MvTp%d.
)|GYxG;8C
public static void sort(int[] data, int algorithm) { ~|S}$|Mi50
impl[algorithm-1].sort(data); m:c0S8#:
} 'A9Z ((
>IipWTVo<
public static interface Sort { lHFk~Qp[
public void sort(int[] data); RWFvf
} |'j,|^<
}nptmc
public static void swap(int[] data, int i, int j) { QabLMq@n`
int temp = data; wlEK"kKU
data = data[j]; >[ g=G
data[j] = temp; Os*s{2OvO
} qYQ vjp
} z 'V$)U$f