[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; H{yUKZH*
} PD,s,A
int i1=l; LTsX{z
int i2=mid+1; v/ $~ifY"
for(int cur=l;cur<=r;cur++){ yE+Wb[H[
if(i1==mid+1) 2H\}N^;f
data[cur]=temp[i2++]; pf&H !-M
else if(i2>r) al#BfcZW
data[cur]=temp[i1++]; barY13)$U
else if(temp[i1] data[cur]=temp[i1++]; wAt|'wP :
else GhlbYa
data[cur]=temp[i2++]; 'c]Fhe fb
} 5B:%##Ug5
} VPC7Dh%.
R_JB`HFy=
} LpV2XL$p>#
z8VcV*6
改进后的归并排序: u4eA++eT
EU5^"\
package org.rut.util.algorithm.support; )s-[d_g
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import org.rut.util.algorithm.SortUtil; FGRdA^`
r]+/"~a
/** p+.xye U(
* @author treeroot e9\eh? bPU
* @since 2006-2-2 T<a/GE/
* @version 1.0 J]AkWEiCJ
*/ *#y9Pve
public class ImprovedMergeSort implements SortUtil.Sort { a62'\wF>D
)(/Bw&$
private static final int THRESHOLD = 10; /s~(? =qYH
L>3-z>u,
/* ~DL-@*&
* (non-Javadoc) ?S8_x]E
* \Bvy~UeE)>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vB?(|
*/ 7;8DKY q
public void sort(int[] data) { [<nmJ-V
int[] temp=new int[data.length]; .wpp)M.w;H
mergeSort(data,temp,0,data.length-1); n1Z*wMwC
} Efa3{ 7>{
LlF|VR&P.
private void mergeSort(int[] data, int[] temp, int l, int r) { 4 (>8tP\Y
int i, j, k; F?c: ).g
int mid = (l + r) / 2; Tfytc$aQ
if (l == r) c,,(s{1
return; p=T6Ix'_2e
if ((mid - l) >= THRESHOLD) F2^qf
mergeSort(data, temp, l, mid); e~1$x`DH
else Ib}~Q@?2
insertSort(data, l, mid - l + 1); 1nZ7xCDK98
if ((r - mid) > THRESHOLD) Qd"R@+i
mergeSort(data, temp, mid + 1, r); cx_$`H
else {P7 I<^,
insertSort(data, mid + 1, r - mid); @xkI?vK6
?y|8bw<
for (i = l; i <= mid; i++) { U|jip1\
temp = data; ]vQU(@+I
} G0mvrc-(
for (j = 1; j <= r - mid; j++) { y**>l{!!
temp[r - j + 1] = data[j + mid]; krSOSWJ
} [ApAd
int a = temp[l]; rx\f:-3g
int b = temp[r]; NGp^/PZX0
for (i = l, j = r, k = l; k <= r; k++) { s$?u'}G3
if (a < b) { k%K\~U8"
data[k] = temp[i++]; 6xW17P
a = temp; @"vTz8oY@
} else { a IgV"3
data[k] = temp[j--]; z#Cgd-^7.#
b = temp[j]; 'iikcf*)C
} [E:-$R
} M1,1J-h
} "o>` Y
Dy|DQ>?}
/** FV>xAU$
* @param data Lv<)Dur0K
* @param l r.10b]b
* @param i <,+6:NmT
*/ $E35W=~)
private void insertSort(int[] data, int start, int len) { ^!x}e+ o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q^|aix~ K
} )A*Sl2ew
} k}908%w
} 1g1gu=|Q
} :qxd s>Xm
7p+uHm
堆排序： ghVxcK
L~} 2&w
package org.rut.util.algorithm.support; j.vBld
I.L8A|nZ
import org.rut.util.algorithm.SortUtil; DOGg=`XK1
MnT+p[.
/** QAK.Qk?Qu
* @author treeroot VsR`y]"g
* @since 2006-2-2 iT"H%{+~
* @version 1.0 WgC*bp{
*/ #zv'N
public class HeapSort implements SortUtil.Sort{ MESPfS+
^p!4`S
/* (non-Javadoc) m8ydX6~max
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Zz<9zix
*/ 26\*x
public void sort(int[] data) { S&m5]h!D
MaxHeap h=new MaxHeap(); 9,;+B8-A
h.init(data); )#n>))
for(int i=0;i h.remove(); ^Wz3 q-^
System.arraycopy(h.queue,1,data,0,data.length); jw!QjVuRN%
} r]vD]
m%?b"kxL[
private static class MaxHeap{ *>XY' -;2e
&Jw4^ob
void init(int[] data){ e`Z3{H}
this.queue=new int[data.length+1]; aE2 3[So
for(int i=0;i queue[++size]=data; 4c_F>Jw[
fixUp(size); 4)3!n*I
} "@[xo7T
} K{00 V#
~Zd n#z\
private int size=0; 9/k?Lv
(u >:G6K
private int[] queue; Px4zI9;cB
E4'D4@\W
public int get() { B&m?3w
return queue[1]; wzMWuA4vX
} n~d`PGs?f
dMwVgc:
public void remove() { `<>8tZS9"
SortUtil.swap(queue,1,size--); Y4Z?`TL
fixDown(1); vN7ihe[C
} 7,e=|%7.
file://fixdown .6E7 R
private void fixDown(int k) { #U&G$E`7
int j; NG_O I*|~
while ((j = k << 1) <= size) { ZH%[wQ~4
if (j < size %26amp;%26amp; queue[j] j++; cuR|cUK
if (queue[k]>queue[j]) file://不用交换 U<r<$K
break; Y#6@0Nn[G
SortUtil.swap(queue,j,k); ;<q@>p[
k = j; .#h]_%
} ;:9 x.IkxC
} `>8|
private void fixUp(int k) { kozg8 `\]
while (k > 1) { [-$&pB>w8'
int j = k >> 1; =QyO$:t
if (queue[j]>queue[k]) F;ONo.v;
break; N"t,6tH
SortUtil.swap(queue,j,k); )hQNIt3o_
k = j; Y=3Y~
} {=g-zsc]K
} 8d)F#
fJE ki>1
} V7401@F
A{6ZEQAh>
} Gcs+@7!b
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SortUtil： 82)d.>
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package org.rut.util.algorithm; Z=F=@<!
6!"15dPN
import org.rut.util.algorithm.support.BubbleSort; Z@ws,f^e
import org.rut.util.algorithm.support.HeapSort; i^IvT
import org.rut.util.algorithm.support.ImprovedMergeSort; QHs]~Ja
import org.rut.util.algorithm.support.ImprovedQuickSort; %?wuKZLnc
import org.rut.util.algorithm.support.InsertSort; `P z !H
import org.rut.util.algorithm.support.MergeSort; XPEjMm'*b3
import org.rut.util.algorithm.support.QuickSort; |\_O8=B%
import org.rut.util.algorithm.support.SelectionSort; zIo))L
import org.rut.util.algorithm.support.ShellSort; D\`$
u%h<5WNh<
/** v%FVz
* @author treeroot J5o"JRJ"
* @since 2006-2-2 _&z>Id`w
* @version 1.0 W"Rii]GK"
*/ nu3 A'E`'k
public class SortUtil { ~0}eNz*
public final static int INSERT = 1; ZbGyl}8ua
public final static int BUBBLE = 2; LTY.i3
public final static int SELECTION = 3; x9ws@=[:
public final static int SHELL = 4; wk/->Rz
public final static int QUICK = 5; xxiLi46/
public final static int IMPROVED_QUICK = 6; e!-'O0-Kw
public final static int MERGE = 7; |-|BM'Y
public final static int IMPROVED_MERGE = 8; VC+\RB#:-
public final static int HEAP = 9; S;c=6@"
W[?B@sdSZ
public static void sort(int[] data) { Qpc{7#bp
sort(data, IMPROVED_QUICK); ;PHnv5 x@f
} -?(RoWv@X&
private static String[] name={ Qm-P& g-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'IP!)DS
}; |}}]&:w2
< 9MnQ*@
private static Sort[] impl=new Sort[]{ =,'Z6?%p
new InsertSort(), pE<' '`
new BubbleSort(), O92Yd$S
new SelectionSort(), |l|]Tw
new ShellSort(), 4 5lg&oO
new QuickSort(), 'KL(A-}!
new ImprovedQuickSort(), ayD\b6Z2.
new MergeSort(), 5^dw!^d
new ImprovedMergeSort(), 1fy{@j(W
new HeapSort() E;4a(o]{t
}; fz&}N`n
A-io-P7qyj
public static String toString(int algorithm){ r Lh h
return name[algorithm-1]; _:L*{=N
} ~c^-DAgB
]G B},
public static void sort(int[] data, int algorithm) { ASvPr*q/
impl[algorithm-1].sort(data); 1I`D$Xq~:
} CA4-&O"
YiTp-@$}
public static interface Sort { [f0HUbPX
public void sort(int[] data); Pb,^UFa=
} Lvq]SzOw
ej;taKzj
public static void swap(int[] data, int i, int j) { zmFFBf"<
int temp = data; \bOjb\ w$
data = data[j]; }gW/heUE
data[j] = temp; FW DuH`-5
} WDdi}i>2
} ]eW|}V7A: