[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; n>BkTaI
} MkfBuW;)
int i1=l; U:^PC x`
int i2=mid+1; --$ 4Q(#
for(int cur=l;cur<=r;cur++){ old(i:2
if(i1==mid+1) : y%d
data[cur]=temp[i2++]; g/CSGIIT
else if(i2>r) S[PE$tYT#t
data[cur]=temp[i1++]; ,-8"R`UI8
else if(temp[i1] data[cur]=temp[i1++]; DtXrWS/
else VY |_dk
data[cur]=temp[i2++]; t*Sa@$p
} I ?gSG*m
} (nf~x
Z2qW\E^_r
} /5(Yy}
Azl&mu
改进后的归并排序: PQ5QA61
bDL,S?@
package org.rut.util.algorithm.support; Enum/O5
%4et&zRC
import org.rut.util.algorithm.SortUtil; J^SdH&%Z
a_f~N1kq
/** cW@Zd5&0S
* @author treeroot +ElfZ4
* @since 2006-2-2 /Z'L^L%R
* @version 1.0 K|zZS%?$
*/ 6jE|
public class ImprovedMergeSort implements SortUtil.Sort { &Sw%<N*r
HK,cJahq
private static final int THRESHOLD = 10; }wr{W:j
g{OwuAC_
/* l;R%= P?'F
* (non-Javadoc) M+||rct
* q&s3wDl/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,(d)Qg
*/ Wbr|_W
public void sort(int[] data) { !t$'AoVBq
int[] temp=new int[data.length]; 2Rw&C6("w
mergeSort(data,temp,0,data.length-1); sFT.Oxg<
} \<JSkr[h!"
yu!h<nfzA
private void mergeSort(int[] data, int[] temp, int l, int r) { Ugu[|,
int i, j, k; l{I6&^!KS
int mid = (l + r) / 2; ($au:'kU
if (l == r) x$5) ^ud?
return; UO0{):w>
if ((mid - l) >= THRESHOLD) iU$] {c2;A
mergeSort(data, temp, l, mid); {.?ZHy\Rk
else LClNxm2X
insertSort(data, l, mid - l + 1); PRu 6xsyA
if ((r - mid) > THRESHOLD) 5D\f8L
mergeSort(data, temp, mid + 1, r); ?pr9f5
else zi|+HM
insertSort(data, mid + 1, r - mid); F U_jGwD
`q}I"iS
for (i = l; i <= mid; i++) { zMbN;tu
temp = data; dgR g>)V
} {MtpkUN
for (j = 1; j <= r - mid; j++) { t3*wjQ3
temp[r - j + 1] = data[j + mid]; =mS\i663
} nKPYOY8^
int a = temp[l]; s)noo
int b = temp[r]; [~-9i&Z
for (i = l, j = r, k = l; k <= r; k++) { q)LMm7
if (a < b) { :o0JY= 5
data[k] = temp[i++]; ;&<{ey
a = temp; "?]{%-u
} else { fkuLj%R
data[k] = temp[j--]; ii[F]sR\
b = temp[j]; qkt0**\
} = s>T;|
} Vq2y4D?
} &+Z,hs9%
!\zWF
/** jN{Xfjmfv
* @param data sD{Wxv
* @param l EN$2,qf
* @param i K-bD<X
*/ *W.C7=
private void insertSort(int[] data, int start, int len) { <;vbsksZeH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >zw.GwN|
} q*U*Fu+
} $Z.7zH
} @Z*W
} Dd'm U
pWy=W&0~qf
堆排序： YLqGRE`W
$bW3_rl%X
package org.rut.util.algorithm.support; f\]sz?KY
_,p/l&<
import org.rut.util.algorithm.SortUtil; $+P>~X)
?oVx2LdD|
/** S=5<^o^h3
* @author treeroot OVm\
* @since 2006-2-2 X &uTSgN
* @version 1.0 AJh w
*/ 1n=lqn/
public class HeapSort implements SortUtil.Sort{ &~8oQC-eF
N >FKy'.gk
/* (non-Javadoc) uD\?(LM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <v)1<*I
*/ DK$X2B"cV
public void sort(int[] data) { JLnH&(O
MaxHeap h=new MaxHeap(); RHmgD;7`
h.init(data); >"|B9Woc
for(int i=0;i h.remove(); %SX|o-B~.o
System.arraycopy(h.queue,1,data,0,data.length); iX0i2ek
} \]</w5 Pi,
f$+,HB
private static class MaxHeap{ 9{RB{<Se!
}p}[j t
void init(int[] data){ }=%oX}[
this.queue=new int[data.length+1]; ?{/4b:ua
for(int i=0;i queue[++size]=data; / : L?~
fixUp(size); #yI mKEYX
} k9k XyX[
} p2ogn}`
LCZ\4g05
private int size=0; &|Bc7+/P
_y),J'W^3u
private int[] queue; tz5e"+Tz
W=j[V Oq
public int get() { Cbg!:Cws
return queue[1]; FKIw!m ~
} ZIf
5*j?E
public void remove() { /I1h2E
SortUtil.swap(queue,1,size--); 0rOfrTNOz%
fixDown(1); )k\H@Dy%$
} +1uF !G&l
file://fixdown XlV0*}S
private void fixDown(int k) { U7K,AflK?M
int j; m+b):
while ((j = k << 1) <= size) { ?%O(mC]u&
if (j < size %26amp;%26amp; queue[j] j++; syWG'(>
if (queue[k]>queue[j]) file://不用交换 O#F
break; 6hlc1?
SortUtil.swap(queue,j,k); 5 xppKt
k = j; 6N",-c
} 43|XSyS
} 4[.oPK=i
private void fixUp(int k) { 4[;X{ !
while (k > 1) { F<L EQ7T
int j = k >> 1; :e_V7t)o
if (queue[j]>queue[k]) d@ i}-;
break; ?\vh9
SortUtil.swap(queue,j,k); 'm4W}F
k = j; )Hpa}FGT
} B P2=2)Q
} Ka[t75~;
QIB\AAclO
} uehDIl0\[b
I/&%]"[^u
} E8pB;\Z(
Gcdd3W`O
SortUtil： "/3 db[
vK9E
package org.rut.util.algorithm; ]Bcp;D
ePr&!Tz#
import org.rut.util.algorithm.support.BubbleSort; GO__$%~
import org.rut.util.algorithm.support.HeapSort; 55tKTpV
import org.rut.util.algorithm.support.ImprovedMergeSort; v*;-yG&
import org.rut.util.algorithm.support.ImprovedQuickSort; ex::m&
import org.rut.util.algorithm.support.InsertSort; ]b\yg2
import org.rut.util.algorithm.support.MergeSort; 23c 8
import org.rut.util.algorithm.support.QuickSort; M[mF8Zf
import org.rut.util.algorithm.support.SelectionSort; %e-7ubW
import org.rut.util.algorithm.support.ShellSort; zbk q
uW30ep'
/** .$qnZWcgG
* @author treeroot <R''oEf9
* @since 2006-2-2 F$ #U5}Q
* @version 1.0 1`(tf6op
*/ p^Ak1qm~e
public class SortUtil { jFASX2.p
public final static int INSERT = 1; S<VSn}vn
public final static int BUBBLE = 2; <J`0mVOX
public final static int SELECTION = 3; 1Md
public final static int SHELL = 4; ^su<uG<R
public final static int QUICK = 5; jzDuE{
public final static int IMPROVED_QUICK = 6; d Vj_8>
public final static int MERGE = 7; z2g3FUTX)b
public final static int IMPROVED_MERGE = 8; VKq=7^W
public final static int HEAP = 9; :pGaFWkvO
4Uphfzv3D
public static void sort(int[] data) { o=50>$5jlS
sort(data, IMPROVED_QUICK); 7s/u(~d)
} .@(6Y<dN
private static String[] name={ H,DM1Z9rz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g]4(g<:O
}; qAn!RkA
Ov-icDMm
private static Sort[] impl=new Sort[]{ OW3sS+y
new InsertSort(), w2 a1mU/
new BubbleSort(), \HKxh:F'
new SelectionSort(), YL]Z<%aKt
new ShellSort(), |G?htZF
new QuickSort(), vRs,zL$W
new ImprovedQuickSort(), TygW0b 1
new MergeSort(), K('hC)1
new ImprovedMergeSort(), 7JEbH?lEN
new HeapSort() E^vJ@O
}; \#Pfj&*
)XvilCk1
public static String toString(int algorithm){ )L#i%)+
return name[algorithm-1]; ~yH?=:>U
} swM*k;$q{
q(`/Vo4g(
public static void sort(int[] data, int algorithm) { rEB@$C^
impl[algorithm-1].sort(data); P(+&OoY2
} RloK,bg
n?- })
public static interface Sort { {so`/EWa
public void sort(int[] data); &Xf^Iu
} 3BtaH#ZY
bn!HUM,
public static void swap(int[] data, int i, int j) { l|kSsP:GO
int temp = data; FFu9&8Y
data = data[j]; ,.kha8v
data[j] = temp; {]:7bV#JP
} U)E(`{p]
} >8k_n