[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; kb]PWOz
} lh&Q{t(+8
int i1=l; >Q#_<IcI
int i2=mid+1; k/?5Fs!#
for(int cur=l;cur<=r;cur++){ =U!M,zw4
if(i1==mid+1) \IbGNV`q
data[cur]=temp[i2++]; g>A*kY
else if(i2>r) 3G dWq*
data[cur]=temp[i1++]; WrQe'ny
else if(temp[i1] data[cur]=temp[i1++]; fa;\4#
else t{| KL<d]
data[cur]=temp[i2++]; 7/w)^&8
} c=K .|g,
} [84ss;.$
MJd!J]E6
} UYn5Pix
%Iw6oG
改进后的归并排序: oQ1>*[e<u
D$d8u=S
package org.rut.util.algorithm.support; +6-c<m|
nxkbI:+t
import org.rut.util.algorithm.SortUtil; H[UV]qO,
+*]"Yo~]}
/** D.9qxM"Z>
* @author treeroot W~z 2Q so
* @since 2006-2-2 +hI:5(_
* @version 1.0 @r^a/]5D
*/ 9aFu51
public class ImprovedMergeSort implements SortUtil.Sort { +] >o@
8e:J{EG~
private static final int THRESHOLD = 10; 3,=97Si=
F~2bCy[Z
/* ) gbns'Z<
* (non-Javadoc) z^j7wMQ
* _8Cw_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GuPxN}n 5
*/ c!vtQ<h-
public void sort(int[] data) { (-viP
int[] temp=new int[data.length]; W+d=BnOa8
mergeSort(data,temp,0,data.length-1); SKt&]H
} +Kw:z?
]1hW/!
private void mergeSort(int[] data, int[] temp, int l, int r) { "`qmeZ$rg
int i, j, k; uT:'Kkb!
int mid = (l + r) / 2; S=B?bD_,c
if (l == r) ,$s NfW
return; M?l/_!QB
if ((mid - l) >= THRESHOLD) (3~h)vaJ
mergeSort(data, temp, l, mid); jR[VPm=
else lZ|+.T!g?
insertSort(data, l, mid - l + 1); ]Jz2[F"J
if ((r - mid) > THRESHOLD) 9+H C!Uot
mergeSort(data, temp, mid + 1, r); >W Tn4SW@
else /j46`F
insertSort(data, mid + 1, r - mid); ]r|sU.Vl
Z;Q2tT/F
for (i = l; i <= mid; i++) { _ p%=RIR
temp = data; uF,F<%d
} "159Q
for (j = 1; j <= r - mid; j++) { |LhVANz
temp[r - j + 1] = data[j + mid]; #t N9#w[K{
} ZOJ<^t}
int a = temp[l]; j5\z7
int b = temp[r]; x7\b-EC
for (i = l, j = r, k = l; k <= r; k++) { ]!CMo+
if (a < b) { O(x1Ja,&
data[k] = temp[i++]; }huj%Pnk)
a = temp; )E9[=4+*C$
} else { UMtnb:ek
data[k] = temp[j--]; ac
b = temp[j]; 8J|2b; Vf
} Buc{dcL/
} NULew]:5
} |i_+b@Lul
_y:-_q
/** )Fk*'6
* @param data 9o%k [n
* @param l e1cqzhI=nA
* @param i HiAj3
*/ pmda9V4
private void insertSort(int[] data, int start, int len) { DO*rVs3'p[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M3q%(!2
} R!&9RvNw
} |wbXu:
} |5il5UP
} 7v'aw"~
Qe,jK{Y< -
堆排序： m\zCHX#n
xER-TT#S
package org.rut.util.algorithm.support; |"]#jx*8KC
{Kh^)oYdd
import org.rut.util.algorithm.SortUtil; p^.qwP\P
we:P_\6
/** L%S(z)xX3
* @author treeroot -gn!8G1
* @since 2006-2-2 6roq 1=
* @version 1.0 O>R@Xj)M
*/ K HyVI6N[
public class HeapSort implements SortUtil.Sort{ CFK{.{d]B
|P_voht
/* (non-Javadoc) <JUumrEo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c,>y1%V*S{
*/ {L'uuG\9U
public void sort(int[] data) { 3~q#P
MaxHeap h=new MaxHeap(); B*Z}=$1j
h.init(data); osM[Xv
for(int i=0;i h.remove(); {Jbouj?V!
System.arraycopy(h.queue,1,data,0,data.length); J497 >w[
} hMCf| e.UY
P5Bva
private static class MaxHeap{ L"8Z5VHA&&
hTc :'vq
void init(int[] data){ g"{`g6(+
this.queue=new int[data.length+1]; Kz~E"?
for(int i=0;i queue[++size]=data; 6;C2^J@
fixUp(size); N)X3pWC8
} o[I s$j
} i/{dD"HwM
h 8<s(WR
private int size=0; P*|qbY
y3XR:d1cg
private int[] queue; }|UTwjquBD
&3Y"Zd!
public int get() { _xsHU`(J#
return queue[1]; OYyF*F&S[
} C5,\DdCX,
,NAwSmocVP
public void remove() { xWK0p'E0
SortUtil.swap(queue,1,size--); k1'd';gQ
fixDown(1); 8q]_> X
} ^*G UcQ$
file://fixdown Prc(
private void fixDown(int k) { 5Vc~yMz
int j; 0VnRtLnqI
while ((j = k << 1) <= size) { ZAJ~Tbm[f
if (j < size %26amp;%26amp; queue[j] j++; Ddh
if (queue[k]>queue[j]) file://不用交换 \J(kevX
break; _TwEym.V
SortUtil.swap(queue,j,k); |.OS7Gt?
k = j; &( ZEs c
} (I/ZI'Ydy
} }wB!Bx2
private void fixUp(int k) { \zh`z/=92
while (k > 1) { :]JMsa6
int j = k >> 1; )Vz=:.D
if (queue[j]>queue[k]) 3qQ}U}-;|
break; _RNP_$a
SortUtil.swap(queue,j,k); Fs}B\R/J
k = j; o\<JG?P
} FM=XoMP q
} e%km}mA
eN'b"_D
} 6W<Ig;
j/8q
} CZ!gu Y=
naiQ$uq0
SortUtil： m2%n:
%!7A" >ai
package org.rut.util.algorithm; ^S`N\X
R5i xG9
import org.rut.util.algorithm.support.BubbleSort; _'|C-j`u$
import org.rut.util.algorithm.support.HeapSort; *V_b/Vt
import org.rut.util.algorithm.support.ImprovedMergeSort; ef@F!s_fI
import org.rut.util.algorithm.support.ImprovedQuickSort; +4n}H}9l
import org.rut.util.algorithm.support.InsertSort; >]HvXEdNZ|
import org.rut.util.algorithm.support.MergeSort; ta@fNS4
import org.rut.util.algorithm.support.QuickSort; W!+eJ!Da
import org.rut.util.algorithm.support.SelectionSort; d(j g "@
import org.rut.util.algorithm.support.ShellSort; [{0/'+;9
'=H3Y_{oO
/** 3, 3n
* @author treeroot 0h kZ
* @since 2006-2-2 +y_V$q$G
* @version 1.0 : sG/
*/ l1.eAs5U
public class SortUtil { 6>3zD)tG
public final static int INSERT = 1; de9e7.(2
public final static int BUBBLE = 2; zjTCq; G
public final static int SELECTION = 3; E9w"?_A)
public final static int SHELL = 4; IrIW>r} -
public final static int QUICK = 5; l*Q OM
public final static int IMPROVED_QUICK = 6; V`0Y p
public final static int MERGE = 7; iA|n\a~ny,
public final static int IMPROVED_MERGE = 8; hh$i1n
public final static int HEAP = 9; 4}Y? :R
?Ld:HE
public static void sort(int[] data) { >[N6_*K]
sort(data, IMPROVED_QUICK); 8.&P4u i
} /!_FE+
private static String[] name={ J|@O4g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )h]tKYx
}; f[*g8p
vl!o^_70(
private static Sort[] impl=new Sort[]{ cR&d=+R&
new InsertSort(), EUq6) K
new BubbleSort(), )afH:
new SelectionSort(), u= Ga}
new ShellSort(), NA YwuE-`
new QuickSort(), >_#A*B|
new ImprovedQuickSort(), ]D^zTl3=q
new MergeSort(), ^U^K\rq 1u
new ImprovedMergeSort(), 3*F|`js"
new HeapSort() K<k\A@rv8H
}; ~iIFe+6
K#N5S]2yb
public static String toString(int algorithm){ ZftucD|ZY/
return name[algorithm-1]; 8/}S/$
} t Kjk<
uG/bCb+V
public static void sort(int[] data, int algorithm) { KkJE-k*D+w
impl[algorithm-1].sort(data); Oiw!d6"Ovq
} V0bKtg1f?-
wuhL r(
public static interface Sort { {)4@rM
public void sort(int[] data); +3pfBE|
} MnQ 6 !1Z
]>0$l _V
public static void swap(int[] data, int i, int j) { >w1jfpQ@t$
int temp = data; U4lAo
data = data[j]; QbYNL9%
data[j] = temp; "2}n(8
} qvs[Gkaa@
} m[w~h\FS