[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; =
} IA<>+NS
int i1=l; vQ*RrHG?c
int i2=mid+1; `kJ)E;v;3
for(int cur=l;cur<=r;cur++){ Pjk2tf0j`
if(i1==mid+1) ]E-3/r$_cO
data[cur]=temp[i2++]; 1I`F?MT
else if(i2>r) _?:jZ1wZ
data[cur]=temp[i1++]; Arg/ge.y
else if(temp[i1] data[cur]=temp[i1++]; 5q*s_acQ
else &ocuZ-5`
data[cur]=temp[i2++]; aPzn4}~/_
} }ymW};W
} rH!sImz,
_]33Ht9
} ~Ni
z]r'8Jc
改进后的归并排序: $1"gFg
HA8A}d~
package org.rut.util.algorithm.support; faDS!E' +
NuPlrCy;
import org.rut.util.algorithm.SortUtil; n<bU'n
AwXzI;F^
/** L'r&'y[
* @author treeroot z?<B@\~
* @since 2006-2-2 Cyd/HTNh<
* @version 1.0 *djLf.I@
*/ :`NZD
public class ImprovedMergeSort implements SortUtil.Sort { iphC\*F
iAZ8Y/
private static final int THRESHOLD = 10; !p/SX>NJ
?5J# yn
/* ]y6{um8"
* (non-Javadoc) {Y@shf;
* ~9 .=t'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7tXy3-~biz
*/ 'bJGQ[c
public void sort(int[] data) { Bkd$'7UT
int[] temp=new int[data.length]; e)wi}\:q_
mergeSort(data,temp,0,data.length-1); _$96y]Bpi
} ed`"xm
IK\~0L;ozE
private void mergeSort(int[] data, int[] temp, int l, int r) { 3s/1\m%
int i, j, k; s[{[pIH
int mid = (l + r) / 2; nf^?X`g
if (l == r) S?d<P
return; /^AH/,p
if ((mid - l) >= THRESHOLD) B;eka[xU
mergeSort(data, temp, l, mid); ]CF-#q}'
else ppRmC,0f^
insertSort(data, l, mid - l + 1); j{OA%G(I
if ((r - mid) > THRESHOLD) ]5jS6@Vl*
mergeSort(data, temp, mid + 1, r); KR#,6
else ":$4/b6
insertSort(data, mid + 1, r - mid); RbL?(
,Q56A#Y\
for (i = l; i <= mid; i++) { @KK6JyOTQ
temp = data; {/]2~!
} v']_)
for (j = 1; j <= r - mid; j++) { oh< -&3Jn
temp[r - j + 1] = data[j + mid]; +#MXeUX"
} EW*sTI3
int a = temp[l]; v1 8<~
int b = temp[r]; %jzTQ+.%]^
for (i = l, j = r, k = l; k <= r; k++) { w2.] 3QAZ
if (a < b) { .qSDe+A
data[k] = temp[i++]; M!'d
a = temp; u:f ]|Q
} else { ,fp+nu8,
data[k] = temp[j--]; UqI #F
b = temp[j]; 7S}0Kuk)
} iT :3e%
} Z?{\34lPj
} 6ieul@?*u*
[*^.$s(
/** ,gVVYH?qR
* @param data E`oA(x7l
* @param l UON=7}=$&
* @param i D_d>A+
*/ bI &<L O
private void insertSort(int[] data, int start, int len) { ;|WUbc6&g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OM[MRZEh G
} D{N8q^Cs9
} GK}52,NM
} M!J7Vj?Ps
} + f67y
ri{*\LV*@
堆排序： W_2;j)i
oRCc8&
package org.rut.util.algorithm.support; 'nq=xi@RC
'IX1WS&\"
import org.rut.util.algorithm.SortUtil; L*Z.T^h
9m M3Ve*
/** N1ipK9a
* @author treeroot J _O5^=BP
* @since 2006-2-2 D`JBK?~
* @version 1.0 K5qCPt`'
*/ MM@,J<
public class HeapSort implements SortUtil.Sort{ }n==^2
wtek5C^
/* (non-Javadoc) \Osu1]Jn>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WiytHuUF
*/ PT2;%=f
public void sort(int[] data) { L(TM& ps\-
MaxHeap h=new MaxHeap(); T#Z&*
h.init(data); @GN2v,WA?
for(int i=0;i h.remove(); 0SL{J*S4[#
System.arraycopy(h.queue,1,data,0,data.length); v8ap"9b
} lD,2])>
-'$ob~*
private static class MaxHeap{ :/T\E\Qr
8 ??-H0P
void init(int[] data){ a&_h(
this.queue=new int[data.length+1]; vN{@c(=g
for(int i=0;i queue[++size]=data; TN0KS]^A3
fixUp(size); rM7qBt
} C#U(POA
} qi4P(s-i
^!1!l-
private int size=0; m;dwt1'Zw
>R F|Q
private int[] queue; 2$Mnwxfk
.gJ2P?
public int get() { mw 28E\U
return queue[1]; I`0-q?l
} cj[b^Wv:
Ks%0!X?3q
public void remove() { `*8}q!.
SortUtil.swap(queue,1,size--); t neTOj
fixDown(1); )aIcA
} OBAO(Ke
file://fixdown %4*c/ c6
private void fixDown(int k) { bCw{9El!K4
int j; V9oBSP'kt
while ((j = k << 1) <= size) { GY]P(NU
if (j < size %26amp;%26amp; queue[j] j++; RM|J |R
if (queue[k]>queue[j]) file://不用交换 tY)L^.*7
break; ^>IP"kF
SortUtil.swap(queue,j,k); gs'M^|e)
k = j; -%`~3*L
} w jkh*Y
} <<>+z5D+
private void fixUp(int k) { EsGu#lD2
while (k > 1) { O@Aazc5K
int j = k >> 1; q|D5 A|)
if (queue[j]>queue[k]) aS [[ AL
break; L)JB^cxf
SortUtil.swap(queue,j,k); .t@|2
k = j; t$!zgUJ
} #kC~qux^
} 4eHSAN"$
,sL'T[tuiU
} Ce}`z L
8Rj5~+5
} ^@^8iZ
;\RVC7
SortUtil： 40kAGs>_
i6if\B
package org.rut.util.algorithm; G)7U&B
60+zoL'
import org.rut.util.algorithm.support.BubbleSort; ztO)~uL
import org.rut.util.algorithm.support.HeapSort; /I7V\
import org.rut.util.algorithm.support.ImprovedMergeSort; P)Adb~r
import org.rut.util.algorithm.support.ImprovedQuickSort; h[remR#3\
import org.rut.util.algorithm.support.InsertSort; PF~@@j
import org.rut.util.algorithm.support.MergeSort; kk=n&M
import org.rut.util.algorithm.support.QuickSort; ZsP^<
import org.rut.util.algorithm.support.SelectionSort; k$kE5kh,S
import org.rut.util.algorithm.support.ShellSort; HgQjw!
!eyLh&]5
/** ;73S;IPR
* @author treeroot FSEf0@O:
* @since 2006-2-2 W>pe-
* @version 1.0 JqzoF}WH
*/ rRe5Q
public class SortUtil { MLdwf}[
public final static int INSERT = 1; {lds?AuK
public final static int BUBBLE = 2; Nh!`"B2B
public final static int SELECTION = 3; X?_rD'3
public final static int SHELL = 4; WzzA:X
public final static int QUICK = 5; ew1L+
public final static int IMPROVED_QUICK = 6; e/D{^*~S
public final static int MERGE = 7; <,~OcJG(
public final static int IMPROVED_MERGE = 8; x/s:/YN'
public final static int HEAP = 9; | 1B0
#*.!J zOg
public static void sort(int[] data) { ^OY$ W
sort(data, IMPROVED_QUICK); }WsPuo
} M}|(:o3Yo
private static String[] name={ 07.p {X R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [edF'7La
}; )O[8 D
?IGp?R^j"
private static Sort[] impl=new Sort[]{ x@ =p
new InsertSort(), >fC&bab
new BubbleSort(), lD0p=`.
new SelectionSort(), TQn!MUj/^
new ShellSort(), oKn$g[,SJh
new QuickSort(), 1`8s "T
new ImprovedQuickSort(), N?@^BZ
new MergeSort(), t1Ts!Q2
new ImprovedMergeSort(), d'_q9uf'
new HeapSort() l+Wux$6U
}; $J6 .0O
(:bf m
public static String toString(int algorithm){ /4r2B.91O
return name[algorithm-1]; {vD$odi
} }_lG2#Ll5
q2%cLbI F
public static void sort(int[] data, int algorithm) { {-5)nS^_
impl[algorithm-1].sort(data); (pELd(*Ga
} ,buX|
IUOf/mM5
public static interface Sort { ?T/4 =
public void sort(int[] data); =Z+^n ?"
} ^2'Y=g>
Y][12{I{
public static void swap(int[] data, int i, int j) { LW<LgN"L-
int temp = data; V6merT79
data = data[j]; ci;2XLAM
data[j] = temp; mP^B2"|q
} #eJfwc1JY
} goR_\b SU