[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; kMa|V0
} I.2>d_^<
int i1=l; ~(rZ)
int i2=mid+1; -s91/|n
for(int cur=l;cur<=r;cur++){ rb>2l3g*
if(i1==mid+1) 7{rRQ~s&g9
data[cur]=temp[i2++]; PIsXX#`7;
else if(i2>r) [H`5mY@
data[cur]=temp[i1++]; 0V2~
else if(temp[i1] data[cur]=temp[i1++]; ,mD$h?g
else $nf %<Q
data[cur]=temp[i2++]; z3fU|*_c
} D/2;b;-
} m&_!*3BAG
J,`I>^G
} b%j4W)Z
q6 4bP4K
改进后的归并排序: ar`}+2Qh0
w-wJhc|
package org.rut.util.algorithm.support; ;Qlb].td
fAT M?
import org.rut.util.algorithm.SortUtil; o107.s
DeN$YE#*
/** *+ O
* @author treeroot uKT\\1Jrq
* @since 2006-2-2 d\ Xijy
* @version 1.0 MG,?,1_ &
*/ $! UEpQ
public class ImprovedMergeSort implements SortUtil.Sort { '&y+,2?;Y[
8U-<Q>
private static final int THRESHOLD = 10; 7<F{a"5P
E{B40E~4
/* 4e|(= W`
* (non-Javadoc) n{%[G2.A
* UO>S2u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3.04Toq!
*/ =I)Ex)
public void sort(int[] data) { 9q<?xO
int[] temp=new int[data.length]; ur/:aI
mergeSort(data,temp,0,data.length-1); Z&y9m@
} @0%^\Qf2
Ni61o?]Nj
private void mergeSort(int[] data, int[] temp, int l, int r) { `S/;S<';
int i, j, k; x):h|/B
int mid = (l + r) / 2; d?OsVT;U
if (l == r) >Co5_sCe
return; KrD?Z2x
if ((mid - l) >= THRESHOLD) ^@xn3zJ
mergeSort(data, temp, l, mid); q6N6QI8/
else h@(S];.
insertSort(data, l, mid - l + 1); JVNp= ikK
if ((r - mid) > THRESHOLD) +C9l7 q
mergeSort(data, temp, mid + 1, r); RD'i(szi?
else %3$EV}dp
insertSort(data, mid + 1, r - mid); {rZ )!
kT4Tb%7KM
for (i = l; i <= mid; i++) { 1bJrEXHXy
temp = data; =xsTVT;sj
} ;*8,PV0b_<
for (j = 1; j <= r - mid; j++) { o51jw(wO
temp[r - j + 1] = data[j + mid]; Z"'tJ3Y.~
} nfjwWDH
int a = temp[l]; [NIaWI,>
int b = temp[r]; CN<EgNt1kN
for (i = l, j = r, k = l; k <= r; k++) { .uu[MzMIu
if (a < b) { 5KDN8pJN
data[k] = temp[i++]; S-KHot ?
a = temp; R8<P}mv
} else { "~/O>.p
data[k] = temp[j--]; JQ]A"xTIa*
b = temp[j]; o@tc
} \L{V|}"X
} use` y^c
} I9;,qd%<T
/#I~iYPe
/** rRzc"W}K+
* @param data 3Ja1|;(2
* @param l -7:_Dy
* @param i Dk`(Wgk2
*/ Sn!5/9Y
private void insertSort(int[] data, int start, int len) { 8[xl3=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _Kf8,|+
} =S:Snk%
} #J09Eka;J
} .7|Iausv
} |Y&&g=7
q,v)X
堆排序： #[.aj2
M"Q{lR
package org.rut.util.algorithm.support; r>ca17
o-_H+p6a
import org.rut.util.algorithm.SortUtil; 8%Hc%T[RnT
!{%BfZX<&
/** qaZQ1<e
* @author treeroot ;2jH;$HZ
* @since 2006-2-2 `4kVe= {
* @version 1.0 OT{cP3;0*o
*/ ap|$8G
public class HeapSort implements SortUtil.Sort{ nBJ'ak
!b4v}70,
/* (non-Javadoc) !$L~/<&0g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {~cM 6W]f
*/ JsD|igqF-
public void sort(int[] data) { SA[wFc
MaxHeap h=new MaxHeap(); {k8R6l1
h.init(data); ^R7|x+
for(int i=0;i h.remove(); ;Qq<5I"y
System.arraycopy(h.queue,1,data,0,data.length); 5~GH*!h%;
} o4F(X0
7X`]}z4g
private static class MaxHeap{ `b?o%5V2x
]wm<$+@
void init(int[] data){ N/6!|F
this.queue=new int[data.length+1]; )wyC8`&-
for(int i=0;i queue[++size]=data; 13K|=6si
fixUp(size); It:,8
} _2 oZhJ
} 51-@4E2:l:
(j?ckah%V
private int size=0; ^aR^M\38
hAU@}"=G
private int[] queue; y/>IF|aX
'@dk3:3t
public int get() { F_-}GN%
return queue[1]; )0?u_Z]w9
} ,xI FF-[0
]FEDAGu
public void remove() { T^Ol=QCu
SortUtil.swap(queue,1,size--); {uN-bl?o
fixDown(1); Q6;bORN
} >u+%H vzc
file://fixdown >S>B tRl
private void fixDown(int k) { MO@XbPZB
int j; B$ jX%e{:S
while ((j = k << 1) <= size) { KAg-M#
if (j < size %26amp;%26amp; queue[j] j++; |[!7^tU*
if (queue[k]>queue[j]) file://不用交换 `Wd4d2aLG
break; apjoIO-<
SortUtil.swap(queue,j,k); [ji')PCAi;
k = j; I,W`s
} bbT1p:RF
} YI>9C 76L
private void fixUp(int k) { XhUVDmeUMb
while (k > 1) { gg/2R?O]
int j = k >> 1; lvx[C7?
if (queue[j]>queue[k]) Irui{%T
break; wZVLpF+7
SortUtil.swap(queue,j,k); Va[t'%~&zR
k = j; Y`."=8R~
} ^l<!:SS
} T:SqENV
kD(#LM<9s
} 2!R+5^Iy
3&6sQ-}*
} CEAmb[h
| {Q}:_/q
SortUtil： tz5\O}
md `=2l
package org.rut.util.algorithm; 0BH-kr
-]t>'Q?
import org.rut.util.algorithm.support.BubbleSort; dQ_hlx!J
import org.rut.util.algorithm.support.HeapSort; ^1yD&i'q
import org.rut.util.algorithm.support.ImprovedMergeSort; Y]7 6y>|e
import org.rut.util.algorithm.support.ImprovedQuickSort; j2%fAs<
import org.rut.util.algorithm.support.InsertSort; {eVv%sbq
import org.rut.util.algorithm.support.MergeSort; gVrfZ&XF84
import org.rut.util.algorithm.support.QuickSort; axOEL:-|Bu
import org.rut.util.algorithm.support.SelectionSort; E 02Y,C
import org.rut.util.algorithm.support.ShellSort; C-\3,
B<ue}t
/** C80< L5\
* @author treeroot (\'$$
* @since 2006-2-2 n5z|@I`S_
* @version 1.0 [RY Rt/?Q
*/ |*DkriYY
public class SortUtil { HYL['B?Wid
public final static int INSERT = 1; vCXmu_S4^>
public final static int BUBBLE = 2; $f%om)
public final static int SELECTION = 3; `F]
public final static int SHELL = 4; 56MY@
public final static int QUICK = 5; 3.1%L"r[)
public final static int IMPROVED_QUICK = 6; v^)B[e!
public final static int MERGE = 7; _zJ /z
public final static int IMPROVED_MERGE = 8; OL%}C*Zq
public final static int HEAP = 9; $E.Fgy:G
0b['{{X(
public static void sort(int[] data) { @;x*~0GZ
sort(data, IMPROVED_QUICK); Y`(~eNX^%
} @biU@[D
private static String[] name={ CRD=7\0(D+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |KY-kRN7
}; g5RH:]DV
gVe]?Jva`
private static Sort[] impl=new Sort[]{ )8oN$20
new InsertSort(), C"$~w3A k
new BubbleSort(), BzS\p3&
new SelectionSort(), $7W5smW/
new ShellSort(), !v(^wqna\
new QuickSort(), cGR)$:
new ImprovedQuickSort(), "LJV}L
new MergeSort(), gcB hEw
new ImprovedMergeSort(), H=\Tse_.
new HeapSort() ^*.+4iHx
}; seRf q&
:U *8S\$
public static String toString(int algorithm){ dpK-
return name[algorithm-1]; o"FR%%
} znSlSQpTv
5IOGH*'U8
public static void sort(int[] data, int algorithm) { Qc)i?Z'6
impl[algorithm-1].sort(data); Kn<+Au_]L
} c~O Lr
KeRC8mYp
public static interface Sort { r>7+&s*yk
public void sort(int[] data); u|T]Ne
} wu><a!3`=o
^)I}#
public static void swap(int[] data, int i, int j) { )QRT/, ;c
int temp = data; Xdo\DQn
data = data[j]; `/'p1?Z"
data[j] = temp; F\^8k/0
} K*{RGE
} $v[mIR