[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; zE$HHY2ovi
} -sJD:G,%
int i1=l; Fd<Ouyxqe
int i2=mid+1; :AztHf?X
for(int cur=l;cur<=r;cur++){ v8yCf7+"
if(i1==mid+1) LS<+V+o2%
data[cur]=temp[i2++]; T&pCLvkz
else if(i2>r) zc)nDyn
data[cur]=temp[i1++]; &>+T*-'
else if(temp[i1] data[cur]=temp[i1++]; Ah7"qv'L\
else eu$VKLY*
data[cur]=temp[i2++]; 0/f|ZH ~!
} -%fj-Y7y
} +CBN[/Z^i
hjg1By(
} HLV8_~gQPf
!vu-`u~86
改进后的归并排序: MSM8wYcD
~%>i lWaHB
package org.rut.util.algorithm.support; @~ke=w6&pe
]`x+wWe
import org.rut.util.algorithm.SortUtil; Fn`Zw:vp6
o}KVT%}
/** U~ a\v8l~
* @author treeroot @Drl5C}+
* @since 2006-2-2 SQK82/
* @version 1.0 8ly)G
*/ K(upzn*a
public class ImprovedMergeSort implements SortUtil.Sort { us|Hb
1DcBF@3sWG
private static final int THRESHOLD = 10; Q}B]b-c+E
\a;xJzc9
/* -avxH?;?7
* (non-Javadoc) >e6OlIW
* ]h`*w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 18F}3t??
*/ q9ra
public void sort(int[] data) { 5"57F88Y1
int[] temp=new int[data.length]; +5|k#'%5
mergeSort(data,temp,0,data.length-1); PV~D;
} cb)7$S
m\jjj^f a
private void mergeSort(int[] data, int[] temp, int l, int r) { @uRJl$3
int i, j, k; d5Ae67
int mid = (l + r) / 2; Gy):hGgN
if (l == r) @,sjM]
return; aB;f*x
if ((mid - l) >= THRESHOLD) s1cu5eCt
mergeSort(data, temp, l, mid); \w1XOm [)
else `x _(EZ
insertSort(data, l, mid - l + 1); Z9M$*Zp
if ((r - mid) > THRESHOLD) )Hin{~h
mergeSort(data, temp, mid + 1, r); rMIX{K)'f
else Qm3F=*)d
insertSort(data, mid + 1, r - mid); d]sqj\Q57
-n|>U:
for (i = l; i <= mid; i++) { c$ib-
temp = data; !6X6_ +}M
} P/ 6$TgQ
for (j = 1; j <= r - mid; j++) { v?]a tb/h`
temp[r - j + 1] = data[j + mid]; F68eI%Y
} [sH3REE1h
int a = temp[l]; z~`X4Segw
int b = temp[r]; 7$%G3Q|)L
for (i = l, j = r, k = l; k <= r; k++) { $dI mA
if (a < b) { &UnhYG{A
data[k] = temp[i++]; [5IbR9_
a = temp; H0"'jd
} else { J'ce?_\?PY
data[k] = temp[j--]; (SW6?5
b = temp[j]; +i!HMyM
} Gu$J;bXVj
} e6_8f*o|s
} &':C"_|&r
cd1-2-4U
/** Zx{Sxv"
* @param data \`~YW<D
* @param l ]3,9."^
* @param i {~9HJDcM
*/ e{87n>+,
private void insertSort(int[] data, int start, int len) { n;:.UGl9.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >i
} 3]kM&lK5\
} 7P(o!%H
} oS%(~])\
} ldp9+7n~
.up[wt gN
堆排序： U'F}k0h?\'
dO2?&f
package org.rut.util.algorithm.support; <S7SH-{_\
j$_?g!I=gK
import org.rut.util.algorithm.SortUtil; ^cPVnl
&S+*1<|`K
/** z6J12tu
* @author treeroot K!ogpd&X&
* @since 2006-2-2 $#n9C79Z@
* @version 1.0 IxUj(l1Fm
*/ M/.M~/~
public class HeapSort implements SortUtil.Sort{ v4Ag~Evcx
{:"<E?+
/* (non-Javadoc) vzfMME17
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 25`W"x_
*/ -E6av|c,F
public void sort(int[] data) { )!rD&l$tE
MaxHeap h=new MaxHeap(); ?/MkH0[G=
h.init(data); d m"R0>
for(int i=0;i h.remove(); NvIg,@}
System.arraycopy(h.queue,1,data,0,data.length); tgCp2`n
} U1/I(w
p2l@6\m\
private static class MaxHeap{ W^^0Rh_
vjGJRk|XED
void init(int[] data){ =/a`X[9vI
this.queue=new int[data.length+1]; b*S,8vE]
for(int i=0;i queue[++size]=data; "2C}Pr,p8
fixUp(size); [g@qZ5I.
} N e{=KdzT
} Gev\bQa
p#4*:rpq4
private int size=0; |=:@<0.'
X:`=\D
private int[] queue; }*9F`=%F
mz1m^p)~{
public int get() { 9+m>|"F0
return queue[1]; _z%\53h
} ?+=,t]`!m
CZ]Dm4
public void remove() { l[5** ?#
SortUtil.swap(queue,1,size--); <astIu Au
fixDown(1); Rh6CV
} j8e=],sQ
file://fixdown &/^p:I
private void fixDown(int k) { sV5k@1Y
int j; [V?HK_~
while ((j = k << 1) <= size) { lrHN6:x(Y4
if (j < size %26amp;%26amp; queue[j] j++; GNmP_N
if (queue[k]>queue[j]) file://不用交换 @+M1M2@Xz
break; \NDW@!X
SortUtil.swap(queue,j,k); AX{<d@z`j
k = j; rT;l#<#VE
} Z-CA9&4Uh
} -6_<]
private void fixUp(int k) { ,ynN801\m
while (k > 1) { lgVT~v{U`n
int j = k >> 1; }Tm+gJA
if (queue[j]>queue[k]) +K'YVB U}
break; (L4C1h_]9
SortUtil.swap(queue,j,k); 34)l3UI~
k = j; })@xWU6!
} C<:wSS^@1
} 3_;=y\F
`xv Uq\
} >J;J&]Olf
RjP]8tH&
} z<A8S=s6n
?S=y>b9R
SortUtil： dmkGIg}
I31Nu{
package org.rut.util.algorithm; D?Ol)aj?
?T%"Jgy8
import org.rut.util.algorithm.support.BubbleSort; @fo(#i&
import org.rut.util.algorithm.support.HeapSort; wb#[&2i
import org.rut.util.algorithm.support.ImprovedMergeSort; tD}{/`{_t
import org.rut.util.algorithm.support.ImprovedQuickSort; wH=7pS"s
import org.rut.util.algorithm.support.InsertSort; b?Q$UMAbH
import org.rut.util.algorithm.support.MergeSort; w(+L&IBC
import org.rut.util.algorithm.support.QuickSort; ?en-_'}~a
import org.rut.util.algorithm.support.SelectionSort; fOSJdX0e|Q
import org.rut.util.algorithm.support.ShellSort; m|?1HCRXRI
V0,5c`H c
/** {Gfsiz6
* @author treeroot 8KR17i1
* @since 2006-2-2 7Y.yl F:
* @version 1.0 1GR|$E
*/ &?@U_emLi
public class SortUtil { fRk'\jzT
public final static int INSERT = 1; %T<c8w}dP
public final static int BUBBLE = 2; 1M_6X7PH
public final static int SELECTION = 3; rjfWty%6pX
public final static int SHELL = 4; mDwuJf8}
public final static int QUICK = 5; 8EiS\$O-
public final static int IMPROVED_QUICK = 6; P%[{ 'u
public final static int MERGE = 7; U[yA`7Zs}
public final static int IMPROVED_MERGE = 8; ~QE?GL
public final static int HEAP = 9; {Ho_U&<
x`wUi*G
public static void sort(int[] data) { rwwyYIlEg
sort(data, IMPROVED_QUICK); 'R$/Qt;uA
} 5A %TpJ
private static String[] name={ k+@ :+RL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g:c?%J
}; 0lqh;/
l'!_km0{d
private static Sort[] impl=new Sort[]{ ZW;Re5?DJ
new InsertSort(), I L&PN`#
new BubbleSort(), u[wDOw
new SelectionSort(), E7SmiD@)
new ShellSort(), /^~)iTwH
new QuickSort(), y(C',Xn
new ImprovedQuickSort(), 44^jE{,9
new MergeSort(), LsMq&a-j2
new ImprovedMergeSort(), WT 5 2
new HeapSort() tC+11M
}; rP(;^8l"
+r"fv*g"
public static String toString(int algorithm){ V2m= m}HQ
return name[algorithm-1]; .)t*!$5=N
} (LVzE_`
,4,./wIq
public static void sort(int[] data, int algorithm) { b9Eb"
impl[algorithm-1].sort(data); =.`e4}u \X
} W$D:mw7
ZS&+<kGD
public static interface Sort { .q 4FGPWz
public void sort(int[] data); =':SOO7
} o|s|Wmx>u
8RZqoQDH
public static void swap(int[] data, int i, int j) { &$pQ Jf
int temp = data; Ni;jMc
data = data[j]; EUPc+D3
data[j] = temp; 6SAYe%e
} zP!j {y4w
} dHn,;Vv^6