[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; ?6MUyH]a
} 90<a'<\|
int i1=l; e<u~v0rDl
int i2=mid+1; {FN4BC`3+
for(int cur=l;cur<=r;cur++){ _t X1z^
if(i1==mid+1) <\ ".6=E#W
data[cur]=temp[i2++]; CA/Lv{[2
else if(i2>r) XzBl }4s
data[cur]=temp[i1++]; q?0&0
else if(temp[i1] data[cur]=temp[i1++]; H5gcP11r
else m{yq.H[X
data[cur]=temp[i2++]; e&<=+\ul
} E|VTbEYG
} .36]>8
1l}fX}5%I;
} u@4khN: ^p
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改进后的归并排序: \tU[,3
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package org.rut.util.algorithm.support; d8^S~7
d&DQ8Gm ^
import org.rut.util.algorithm.SortUtil; p<RIvSqM
Gx%f&H~Z^
/** TPi{c_ ]
* @author treeroot 8(-N;<Ef2
* @since 2006-2-2 lp1GK/!s
* @version 1.0 Qer}eg`R
*/ RE;)#t?K
public class ImprovedMergeSort implements SortUtil.Sort { J>0RN/38o
3e;ux6
private static final int THRESHOLD = 10; 3`njQvI\
3+vMi[YO
/* '81WogH:
* (non-Javadoc) ;'4Kg@/
* n1y*`5!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !!v9\R4um
*/ @l~MY*hp
public void sort(int[] data) { 6?l|MU"Q.
int[] temp=new int[data.length]; B}d)e_uLj
mergeSort(data,temp,0,data.length-1); Vf$q3X
} zj;KtgcE
DV~g
private void mergeSort(int[] data, int[] temp, int l, int r) { o{MmW~/o&
int i, j, k; ]Mgxv>zRbs
int mid = (l + r) / 2; 11-?M
if (l == r) 4~0@(3
return; aN"dk-eK
if ((mid - l) >= THRESHOLD) %T~LK=m
mergeSort(data, temp, l, mid); 6p~8(-nG
else fSm|anuKZe
insertSort(data, l, mid - l + 1); U0dhr;l
if ((r - mid) > THRESHOLD) l]geQl:7`r
mergeSort(data, temp, mid + 1, r); pIvr*UzY
else _I#a`G
insertSort(data, mid + 1, r - mid); 2PVQSwW:
!4fT<V(
for (i = l; i <= mid; i++) { !;&{Q^}
temp = data; 4]ETF+
} qyY]: (8
for (j = 1; j <= r - mid; j++) { #}nDX4jI
temp[r - j + 1] = data[j + mid]; M{`uI8vD
} LhtA]z,m
int a = temp[l]; kwpbgQ
int b = temp[r]; .OvH<%g!.
for (i = l, j = r, k = l; k <= r; k++) { 2[Bw+<YA`
if (a < b) { ]*yUb-xY
data[k] = temp[i++]; hkvymHaG
a = temp; p!p:LSk"/b
} else { &v&e-|r8;
data[k] = temp[j--]; :3By7BZgj
b = temp[j]; N/eFwv.Er
} @"BkLF
} fTV}IP
} G297)MFF
FKkL%:?
/** a3E.rr;b
* @param data U jB5Xks
* @param l 4lF?s\W:
* @param i mu&%ph=
*/ kZHIzU
private void insertSort(int[] data, int start, int len) { `>skcvkm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bWfT-Jewh
} >R2o7~
} >iFi~)i_4y
} @N+6qO}
} CC{{@
s<fzk1LZ
堆排序： qb7ur;
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package org.rut.util.algorithm.support; 3q:>NB<
8YwSaBwO
import org.rut.util.algorithm.SortUtil; ?UV!^w@L:0
"*0h=x$
/** ZH8Oidj`
* @author treeroot ""u>5f
* @since 2006-2-2 137:T:
* @version 1.0 KeE)9e
*/ 6`sS8Ar&u
public class HeapSort implements SortUtil.Sort{ s!F` 0=J^
'AJlkLqm#>
/* (non-Javadoc) 4WZ"8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! )PV-[2
*/ 2g:V_%
public void sort(int[] data) { Vo:Gp
MaxHeap h=new MaxHeap(); =6LF_=}
h.init(data); k&SI-jxj
for(int i=0;i h.remove(); 6F4OISy%3
System.arraycopy(h.queue,1,data,0,data.length); ;$$.L bb8
} \?rBtD(
v\b@;H`
private static class MaxHeap{ !Au9C
3lD1G~
void init(int[] data){ m(?ZNtBQt
this.queue=new int[data.length+1]; ^=V b'g3P~
for(int i=0;i queue[++size]=data; UCF'%R
fixUp(size); }qn@8}
} z;d]=PT
} leomm+f^
hj|P*yKV
private int size=0; 9$oU6#U,h
&$+nuUA
private int[] queue; FF7
!%s&GD8&l
public int get() { K\a=bA}DG
return queue[1]; $wx)/t<
} X9oxni#
P]b *hC
public void remove() { An0Zg'o!G
SortUtil.swap(queue,1,size--); ri?>@i-9=
fixDown(1); Zr U9oy&!C
} Q1?09
file://fixdown ?YTngIa
private void fixDown(int k) { Yl!~w:O!o
int j; 6I`Lszs
while ((j = k << 1) <= size) { DsZBhjCB
if (j < size %26amp;%26amp; queue[j] j++; 3 2MdDa
if (queue[k]>queue[j]) file://不用交换 Hp!c\z;
break; , e6}p
SortUtil.swap(queue,j,k); }g\1JSJ%H
k = j; ohPCYt
} ;mw$(ZKa#
} p2Fff4nQ
private void fixUp(int k) { vOl<
while (k > 1) { @CJ`T&
int j = k >> 1; VkChRzhC
if (queue[j]>queue[k]) 6*]g~)7`Q~
break; >|S&@<
SortUtil.swap(queue,j,k); d|RqS`h ]
k = j; =T0;F0@#4
} fI([vI
} WzwH;!
y$7vJl.uS/
} #uzp
6pCQP c*A
} ^UEExjf
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SortUtil： f1_b``M
ZWH9E.uj
package org.rut.util.algorithm; hhU: nw
6yN8(&`
import org.rut.util.algorithm.support.BubbleSort; qij<XNZU"&
import org.rut.util.algorithm.support.HeapSort; yD-L:)@"
import org.rut.util.algorithm.support.ImprovedMergeSort; +%%Ef]
import org.rut.util.algorithm.support.ImprovedQuickSort; (WISf}[l;
import org.rut.util.algorithm.support.InsertSort; v3ky;~ke
import org.rut.util.algorithm.support.MergeSort; ~5Cid)Q}@o
import org.rut.util.algorithm.support.QuickSort; e2X\ll
import org.rut.util.algorithm.support.SelectionSort; sG6ts,={
import org.rut.util.algorithm.support.ShellSort; :47bf<w|Y
G'M;]R9EP
/** d}Y\;'2,
* @author treeroot ip`oL_c
* @since 2006-2-2 *@zh
* @version 1.0 XJ3p<
*/ -szSA
public class SortUtil { +=:*[JEK,U
public final static int INSERT = 1; b-+~D9U<
public final static int BUBBLE = 2; ; m]KKB
public final static int SELECTION = 3; R|&Rq(ow"
public final static int SHELL = 4; \@}G'7{
public final static int QUICK = 5; '=Z]mi/aw
public final static int IMPROVED_QUICK = 6; PXRkK63
public final static int MERGE = 7; t{ R\\j
public final static int IMPROVED_MERGE = 8; WE*L=_zDS
public final static int HEAP = 9; h|T_ k
djk?;^8
public static void sort(int[] data) { @X?7a]+;8
sort(data, IMPROVED_QUICK); 3hi0
} DT Cwf
private static String[] name={ sgGXj7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cOq'MDr
}; z[0+9=<Y
>]!8f?,
private static Sort[] impl=new Sort[]{ R_7[7/a
new InsertSort(), +&*D7A>~p
new BubbleSort(), sMn)[k vX
new SelectionSort(), 2&,jO+BqE@
new ShellSort(), _&wrA3@/L
new QuickSort(), R[#vFQ
new ImprovedQuickSort(), p|gzU$FWbk
new MergeSort(), dKk#j@[n"
new ImprovedMergeSort(), 'e(]woe
new HeapSort() ms]r1x"
}; IW{}l=D/
y v58~w*"
public static String toString(int algorithm){ @,:6wKMc
return name[algorithm-1]; (2J\o
} \2c3Nsra
q^w@l
public static void sort(int[] data, int algorithm) { #lY_XV.
impl[algorithm-1].sort(data); "M!]t,?S
} m}$7d5
3!u`PIQv
public static interface Sort { _t/~C*=:=
public void sort(int[] data); */6lyODf
} ~z kzuh
7@1GSO:Yf
public static void swap(int[] data, int i, int j) { ;xl0J*r
int temp = data; DuMzK%
data = data[j]; >lV'}0u)
data[j] = temp; ) w1`<7L
} 11((b
} `6:B0-r