[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; Rl. YF+YH
} (}]ae*
int i1=l; -HE@wda
int i2=mid+1; W^es"\
for(int cur=l;cur<=r;cur++){ -3z$~ {
if(i1==mid+1) "sM 3NY
data[cur]=temp[i2++]; C EzTErn
else if(i2>r) %^5|3l3y
data[cur]=temp[i1++]; NrHh(:
else if(temp[i1] data[cur]=temp[i1++]; &!kD81?Mm
else ]M:=\h,t>
data[cur]=temp[i2++]; p41TSALq
} ]r|nz~Aa$
} {^Y0kvnd
dx/NY1
} jjT|@\-u
qs["&\@
改进后的归并排序: >~nc7j u
1x"S^j
package org.rut.util.algorithm.support; #QWG5
S)$)AN<O
import org.rut.util.algorithm.SortUtil; da'7* &/
Xy0KZ !
/** \-Oq/g{j
* @author treeroot w9Eb\An
* @since 2006-2-2 5kRP Sfh
* @version 1.0 82EH'C
*/ hC nqe
public class ImprovedMergeSort implements SortUtil.Sort { @TvoCDeI
mYE8]4
private static final int THRESHOLD = 10; 2I8RO\zR
{J?#KHF'|
/* f|U J%}$v;
* (non-Javadoc) B9Ha6kj
* ^GyGh{@,f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p^E}%0#
*/ % T2C0P
public void sort(int[] data) { _#kjiJj*
int[] temp=new int[data.length]; n#NE.ap$&,
mergeSort(data,temp,0,data.length-1); ]]InD N
} hj8S".A_
>z,SN
private void mergeSort(int[] data, int[] temp, int l, int r) { F+lsza
int i, j, k; |?kZfr&9q
int mid = (l + r) / 2; FtEmSKD
if (l == r) 1]yjhw9g
return; A3!xYG=+
if ((mid - l) >= THRESHOLD) -UhSy>m
mergeSort(data, temp, l, mid); _:0)uR LS
else *<5zMSZO
insertSort(data, l, mid - l + 1); Me.t_)
if ((r - mid) > THRESHOLD) E&RiEhuv
mergeSort(data, temp, mid + 1, r); 1z#0CX}Y/H
else Zl:Z31
insertSort(data, mid + 1, r - mid); $PNS`@B
WX2w7O'R
for (i = l; i <= mid; i++) { nVK`H@5fw
temp = data; OE"r=is
} C4`u3S
for (j = 1; j <= r - mid; j++) { =s\RK
temp[r - j + 1] = data[j + mid]; knPo"GQW
} Hy_}e"
int a = temp[l]; c^$+=-G{fd
int b = temp[r]; DM73 Nn^5
for (i = l, j = r, k = l; k <= r; k++) { UP*\p79oO
if (a < b) { e@GR[0~
data[k] = temp[i++]; )]^xy&:|
a = temp; Za&.sg3RG
} else { hZudVBn
data[k] = temp[j--]; 4Y=sTXbFt
b = temp[j]; :Hn*|+'
} R>3a?.X
} 9qqzCMrI0e
} neHozmm|
HLPnbI-+
/** \Jcj4
* @param data s[ CnJZ\q
* @param l w'Cn3b)`
* @param i S!u`V3-s
*/ -d|VXD5N
private void insertSort(int[] data, int start, int len) { EK-Qa<[|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B;ro(R
} d+6 by,'
} SiM1Go}#
} 2K8?S
} _QhB0/C
kH)JBx.
堆排序： ?^# h|aUp.
iTt#%Fs)4M
package org.rut.util.algorithm.support; ~[|zf*ZISG
kRyt|ryWh
import org.rut.util.algorithm.SortUtil; =Wl*.%1 b
Hko(@z
/** L 1fK
* @author treeroot f +#
* @since 2006-2-2 w84 ]s%y
* @version 1.0 e' `xU
*/ ()E:gqQ
public class HeapSort implements SortUtil.Sort{ Vs)%*1><
'm;M+:l 6
/* (non-Javadoc) 'k9?n)<DW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /$IF!q+C
*/ @;-6qZ
public void sort(int[] data) { lZ3o3"
MaxHeap h=new MaxHeap(); yxECK&&P0#
h.init(data); "dKYJ&$
for(int i=0;i h.remove(); 2Qoj>Wy{
System.arraycopy(h.queue,1,data,0,data.length); yrDWIU(8;6
} '.@'^80iQ
No\H QQ
private static class MaxHeap{ {(DD~~)D
j15TavjGh
void init(int[] data){ :Rs% (Z
this.queue=new int[data.length+1]; Kb_R "b3v
for(int i=0;i queue[++size]=data; sFEkxZi<
fixUp(size); I6]|dA3G
} W~1/vJ.*l
} @~!1wPvF`I
dBV^Khf J
private int size=0; ~YIGOL"?
J,s)Fu\j@
private int[] queue; ?kICYtY:_b
)P^5L<q>|
public int get() { s*gyk
return queue[1]; eQk ~YA]K
} \ B~9Ue!
)shzJ9G
public void remove() { /H)K_H#|;
SortUtil.swap(queue,1,size--); #]s>
fixDown(1); :!a9|Fh~
} o6pnTu
file://fixdown 9o.WJ
private void fixDown(int k) { %6`{KT?
int j; r<;bArs-u
while ((j = k << 1) <= size) { Fj9/@pe1
if (j < size %26amp;%26amp; queue[j] j++; .+G),P)
if (queue[k]>queue[j]) file://不用交换 w;.'>ORC
break; 5Wj+ey^^w
SortUtil.swap(queue,j,k); -jB1tba
k = j; %Fc,$ =
} eNlE]W,=
} s,TKC67.%+
private void fixUp(int k) { {~yj]+Im
while (k > 1) { IMY?L
int j = k >> 1; &* 4uji
if (queue[j]>queue[k]) 47_4`rzy;
break; N\<RQtDg
SortUtil.swap(queue,j,k); ^R.#n[-r2
k = j; _=Y]ZX`j
} %S8e:kc6
} B$k<F8!%
M}4%LjD
} Fzk
a z 7Vy-
} 7?K?-Oj
/)SwQgK#
SortUtil： w:Fi 2aJ
%}cGAHV
package org.rut.util.algorithm; (Q !4\Gy
>Fm}s,
import org.rut.util.algorithm.support.BubbleSort; *=L3bBu?
import org.rut.util.algorithm.support.HeapSort; 4-[L^1%S[
import org.rut.util.algorithm.support.ImprovedMergeSort; t=iSMe
import org.rut.util.algorithm.support.ImprovedQuickSort; vy#n7hdCc
import org.rut.util.algorithm.support.InsertSort; vq*N
import org.rut.util.algorithm.support.MergeSort; 2q J}5
import org.rut.util.algorithm.support.QuickSort; SN|EWe^
import org.rut.util.algorithm.support.SelectionSort; 1oaiA/bq
import org.rut.util.algorithm.support.ShellSort; ykSn=0
gZgb-$b
/** ^_JD 7-g
* @author treeroot nBL7LocvR
* @since 2006-2-2 .ag4i;hS8
* @version 1.0 Pze$QBNoRd
*/ s)"C~w^
public class SortUtil { g^(wZ$NH
public final static int INSERT = 1; m;{_%oQ;
public final static int BUBBLE = 2; s bd;Kn
public final static int SELECTION = 3; /hf}f=7kH
public final static int SHELL = 4; 5n1;@Vr
public final static int QUICK = 5; DF'-dh</*
public final static int IMPROVED_QUICK = 6; PygT_-3z{
public final static int MERGE = 7; sTdD=>
public final static int IMPROVED_MERGE = 8; au2ieZZ[
public final static int HEAP = 9; km'3[}8o&
bC?uyo"
public static void sort(int[] data) { qSj2=dlW
sort(data, IMPROVED_QUICK); |c,":R
} }% JLwN
private static String[] name={ zJ7vAL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @HJ&"72$<
}; DDn@M|*$
AD=@
private static Sort[] impl=new Sort[]{ Ae:(_UJz
new InsertSort(), (E59)z -
new BubbleSort(), OwV>`BIwns
new SelectionSort(), -_.)~)P
new ShellSort(), R9D<lX0%
new QuickSort(), j]}A"8=1
new ImprovedQuickSort(), tYiK#N7
new MergeSort(), mq$'\c 9.
new ImprovedMergeSort(), ,xB&{J
new HeapSort() ;!&A
}; xn1
+:?-Xd:p
public static String toString(int algorithm){ ZO{uG(u
return name[algorithm-1]; EP&iG%(k
} :j9{n ,F
K>6#MI
public static void sort(int[] data, int algorithm) { :\L{S
impl[algorithm-1].sort(data); eX7Ev'(H
} q$e2x=?
iU{bPyz,
public static interface Sort { Rv ?Go2
public void sort(int[] data); ge:UliHJ
} 6Lz{/l8
!YSAQi;I
public static void swap(int[] data, int i, int j) { |/C>xunzz
int temp = data; RVy8%[Gcq
data = data[j]; 7$WO@yOsh
data[j] = temp; XWZ *{/u
} 9d^o2Yo
} ?dlQE,hB$