[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; 6S2D\Bt,_
} +g/y)]AP
int i1=l; A>xFNem
int i2=mid+1; Fj7cI +
for(int cur=l;cur<=r;cur++){ 'X<R)E
if(i1==mid+1) {O]Cj~}
data[cur]=temp[i2++]; Z[FSy-;"
else if(i2>r) mmu{K$9}I
data[cur]=temp[i1++]; &xj?MgdNL
else if(temp[i1] data[cur]=temp[i1++]; -SlLX\>p
else <nvz*s
data[cur]=temp[i2++]; %_(e{Mf)
} n*9)Y~
} R}#?A%,*
WDP$w(M
} GW]Ygf1t
tOn/r@Fd^E
改进后的归并排序: K!).QB'
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package org.rut.util.algorithm.support; f-k%P$"X&
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import org.rut.util.algorithm.SortUtil; @v2_gjRe
[as\>@o
/** GASDkVoij
* @author treeroot cE$<6&0
* @since 2006-2-2 \uc]+nV!o
* @version 1.0 V) a<)
*/ o3#qp>R
public class ImprovedMergeSort implements SortUtil.Sort { tVQq,_9C
| KtI:n4d
private static final int THRESHOLD = 10; W_.WMbT
.>#X*u
/* g'cLc5\
* (non-Javadoc) ba-4V8w
* \!LIqqX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mc,3j~i
*/ }TQa<;Q
public void sort(int[] data) { 9]C%2!Ur,
int[] temp=new int[data.length]; AjVX
mergeSort(data,temp,0,data.length-1); iX%9$Bft<
} CKI.\o
.jUM'; l
private void mergeSort(int[] data, int[] temp, int l, int r) { w)N~u%
int i, j, k; bog3=Ig-
int mid = (l + r) / 2; ]*?lgwE
if (l == r) NC%96gfD
return; mq}V @H5
if ((mid - l) >= THRESHOLD) s Poh\n
mergeSort(data, temp, l, mid); sZx`u+
else EDT9O
insertSort(data, l, mid - l + 1); @r&*Qsf|
if ((r - mid) > THRESHOLD) 40%fOu,u`
mergeSort(data, temp, mid + 1, r); dBw7l}
else 6(=B`Z}a
insertSort(data, mid + 1, r - mid); Al1_\vx7
\sz*M B
for (i = l; i <= mid; i++) { Yt[LIn-v:
temp = data; qv^P
} 5^D094J|^
for (j = 1; j <= r - mid; j++) { dGgltY
temp[r - j + 1] = data[j + mid]; EHy15RL
} kXV;J$1
int a = temp[l]; IR:GoD+
int b = temp[r]; [tT_ z<e`
for (i = l, j = r, k = l; k <= r; k++) { oam$9 q
if (a < b) { C$p012D1
data[k] = temp[i++]; Mw3$QRM
a = temp; 5vFM0
} else { $PG(>1e
data[k] = temp[j--]; A9lw^.
b = temp[j]; |8pSMgN
} #SKC>MGz
} _Pno9|
} T+^Sa J
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/** uH?dy55Y
* @param data ?wu@+
* @param l tm/=Oc1p
* @param i ~/X8Hy!-
*/ Ni8%K6]z
private void insertSort(int[] data, int start, int len) { O|S,="h"}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,,H;2xYf
} _CPj]m{
} ber&!9
} 118lb]
} ZJF"Yo
2 431v@
堆排序： 1d~d1Rd
b}fC' h
package org.rut.util.algorithm.support; =/}Rnl+c
P4HoKoj2`
import org.rut.util.algorithm.SortUtil; tmOy"mq67
<o9AjASv\,
/** }]H7uC!t
* @author treeroot &',#j]I
* @since 2006-2-2 3b\s;!
* @version 1.0 Cu5_OJ
*/ e,{k!BXU#'
public class HeapSort implements SortUtil.Sort{ w>8HS+
wm^1Fn--
/* (non-Javadoc) =dH=3iCG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V,=5}qozQ
*/ n-2!<`UFX
public void sort(int[] data) { tvf5b8(Y-
MaxHeap h=new MaxHeap(); kkfBVmuW
h.init(data); B8eZ}9X
for(int i=0;i h.remove(); rHjDf[5+
System.arraycopy(h.queue,1,data,0,data.length); n_4.`vs
} M*bsA/Z
Qy"%%keV'T
private static class MaxHeap{ :-#7j} R&
y\j[\UZKO
void init(int[] data){ 5Pq6X
this.queue=new int[data.length+1]; )b (+=
for(int i=0;i queue[++size]=data; #'O9Hn({
fixUp(size); )Nx*T9!Q
} (1q(6!
} 0LXu!iix
s0]ZE\`H>
private int size=0; wl%ysM|x
O7_y QQAA
private int[] queue; "=K3sk
w)* H&8h@
public int get() { sVFX(yx0
return queue[1]; fd #QCs
} FWU>WHX
@`+\vmfD
public void remove() { J zFR9DEt
SortUtil.swap(queue,1,size--); _VjaTw8iM
fixDown(1); Nt_sV7zzb
} `n-/~7
file://fixdown olr#3te
private void fixDown(int k) { x^_c4,i)
int j; = 03G~7B>
while ((j = k << 1) <= size) { h5T~dGRlR
if (j < size %26amp;%26amp; queue[j] j++; j~S=kYrGM
if (queue[k]>queue[j]) file://不用交换 >);M\,1\I
break; *2N0r2t&
SortUtil.swap(queue,j,k); \v+c.
k = j; -IVWkA)7
} }@jJv||
} /=l!F'
private void fixUp(int k) { %-$ :/N
while (k > 1) { ZU0*iA
int j = k >> 1; h+!R)q8M
if (queue[j]>queue[k]) 0FH.=
break; %Jd!x{a`>A
SortUtil.swap(queue,j,k); gBWr)R
k = j; W5Jy"]^I
} ^V9|uHOJoq
} Gg GjBt
9ghUiBPiL:
} a(|0'^
~*\ *8U@7
} pbqk
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SortUtil： })kx#_o]'d
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package org.rut.util.algorithm; J4j:nd
{*g{9`
import org.rut.util.algorithm.support.BubbleSort; yKK9b
import org.rut.util.algorithm.support.HeapSort; xL<c/B`-:
import org.rut.util.algorithm.support.ImprovedMergeSort; k#~oagW_Gw
import org.rut.util.algorithm.support.ImprovedQuickSort; ;gu4~LQw
import org.rut.util.algorithm.support.InsertSort; FqGMHM\J
import org.rut.util.algorithm.support.MergeSort; /pU`-
import org.rut.util.algorithm.support.QuickSort; khT[
import org.rut.util.algorithm.support.SelectionSort; ~,)D n
import org.rut.util.algorithm.support.ShellSort; s:_j,/H0A}
iqB%sIP
/** Y}q~Km
* @author treeroot +>2.O2)%q
* @since 2006-2-2 r~7}w4U
* @version 1.0 mea} 9]c
*/ 5A5t
public class SortUtil { :i {; 81V
public final static int INSERT = 1; v$JW7CKA
public final static int BUBBLE = 2; |%#NA!e4wA
public final static int SELECTION = 3; Tj!\SbnA[
public final static int SHELL = 4; /[/{m]
public final static int QUICK = 5; rK}sQ4z=
public final static int IMPROVED_QUICK = 6; u#y)+A2&!
public final static int MERGE = 7; Z!fbc#L6
public final static int IMPROVED_MERGE = 8; kz("LI]
public final static int HEAP = 9; Fo%`X[?
m!^$_d\%~
public static void sort(int[] data) { _(~E8g
sort(data, IMPROVED_QUICK); & @_PY
} -k2|`t _
private static String[] name={ |)0Ta9~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rg46V-"d,@
}; XN?my@_HpM
BNb_i H
private static Sort[] impl=new Sort[]{ FjiIB1 T
new InsertSort(), 7i02M~*uS
new BubbleSort(), g3Hi5[-H
new SelectionSort(), &m9= q|;m
new ShellSort(), ''!j:49
new QuickSort(), 4f~q$Sf]<
new ImprovedQuickSort(), saQo]6#
new MergeSort(), !Z{7X ^
new ImprovedMergeSort(), mF4OLG3L0
new HeapSort() <pKOFN%m
}; q;f L@L@-
kJNg>SN*@#
public static String toString(int algorithm){ >f-RzQ k
return name[algorithm-1]; )#hR}|
} 5 I#-h<SG
x5;D'Y t"|
public static void sort(int[] data, int algorithm) { @7Ln1v
impl[algorithm-1].sort(data); .A6pPRy e
} H0t#J
Yy`A0v
public static interface Sort { yiH;fK+x
public void sort(int[] data); U%#Vz-r
} J_|%8N{[x
*&h]PhY
public static void swap(int[] data, int i, int j) { <Zfh5AM
int temp = data; loBW#>
data = data[j]; >lek@euqw
data[j] = temp; BV/ ^S.~
} gOE?
} < %<nh`D