[JAVA]用Java实现的各种排序

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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; ^Voi4;
} ~d072qUos
int i1=l; BrO" _
int i2=mid+1; Dxlpo! ?#
for(int cur=l;cur<=r;cur++){ gx',~
if(i1==mid+1) j aEUz5
data[cur]=temp[i2++]; @jxAU7!
else if(i2>r) ZcLW8L
data[cur]=temp[i1++]; WQ1~9#
else if(temp[i1] data[cur]=temp[i1++]; rV0X*[]J>
else t/57LjV
data[cur]=temp[i2++]; }pMd/|A,
} [,)G\
} V|n}v?f_q
|r%NMw #y
} t0*,%ge:<
=h Lw1~
改进后的归并排序: +-*Ww5Zti
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package org.rut.util.algorithm.support; >{HQ"{Q
8*iIJ
import org.rut.util.algorithm.SortUtil; UTLuzm
&xYO6_.
/** #NZ#G~oeO
* @author treeroot QU;bDNq,c
* @since 2006-2-2 qG<3H!Z!ky
* @version 1.0 c&GVIrJ
*/ [<,i}z
public class ImprovedMergeSort implements SortUtil.Sort { +M=`3jioL
qLYz-P'ik
private static final int THRESHOLD = 10; +\_c*'K>
7H l>UX,|
/* ls*bCe
* (non-Javadoc) !JGe .U5
* l3O!{&~K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kR,ry:J-
*/ };Oyv7D+b
public void sort(int[] data) { F!_8?=|
int[] temp=new int[data.length]; =}D9sT
mergeSort(data,temp,0,data.length-1); w5+H9R6
} 3HEm-pok
?bH&F
private void mergeSort(int[] data, int[] temp, int l, int r) { |Fi{]9(G2
int i, j, k; K!,T.qA&=
int mid = (l + r) / 2; 8= kwc
if (l == r) $Vp*,oRL
return; j"F?^0aR,Q
if ((mid - l) >= THRESHOLD) H-&T)
mergeSort(data, temp, l, mid); }NJKkj?
else mfqnRPZ
insertSort(data, l, mid - l + 1); !*1$j7`tP
if ((r - mid) > THRESHOLD) \}Al85
mergeSort(data, temp, mid + 1, r); e~U]yg5X-
else 2rV]n
insertSort(data, mid + 1, r - mid); TT@U_^o
]?6Pt:N2
for (i = l; i <= mid; i++) { [eO^C
temp = data; FMi:2.E
} lsaA
for (j = 1; j <= r - mid; j++) { 4`GOBX1b.y
temp[r - j + 1] = data[j + mid]; S"4eS,5L|
} 2{Y~jYt{h
int a = temp[l]; x:K~?c3
int b = temp[r]; ZfMs6`Wv 1
for (i = l, j = r, k = l; k <= r; k++) { b} 0G~oLP
if (a < b) { Uv m:`e~?
data[k] = temp[i++]; L</k+a?H!
a = temp; $<QrV,T
} else { Rb!y(&>v
data[k] = temp[j--]; 9{wRqY
b = temp[j]; ObfRwZh?q
} z"97AXu
} ;_=N YG.
} uOO\!Hqq
a$j ~YUG_
/** r~z'QG6v/
* @param data %s! |,Cu
* @param l 4{@{VsXN
* @param i r7,}"Pl
*/ ]rG/?1'^i
private void insertSort(int[] data, int start, int len) { .P <3+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4*ZY#7h
} Z]e`bfNnI
} <2E|URo,#
} lA pZC6Iwk
} o! l Ykud
=EYWiK77a
堆排序： 5Xf]j=_
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package org.rut.util.algorithm.support; _u+ 7>
<iA\ZS:
import org.rut.util.algorithm.SortUtil; r'`7}@H*
q3<kr<SP
/** ua)jGif
* @author treeroot F"bz<{
* @since 2006-2-2 u0GHcpOm
* @version 1.0 au04F]-|j8
*/ -V4%f{9T3
public class HeapSort implements SortUtil.Sort{ -@e2/6Oi
64mg:ed&
/* (non-Javadoc) ruQt0q,W3%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RC/45:hZZ
*/ {#:31)P
public void sort(int[] data) { nTv}/M&
MaxHeap h=new MaxHeap(); X@"G1j >/
h.init(data); 7o0zny3?
for(int i=0;i h.remove(); \ )=WA!
System.arraycopy(h.queue,1,data,0,data.length); )S 7+y6f&*
} 4EHrd;|
|mP};&b
private static class MaxHeap{ 3 3|t5Ia
BZ=I/L
void init(int[] data){ 1$8@CT^m
this.queue=new int[data.length+1]; e{7\pQK
for(int i=0;i queue[++size]=data; <)p.GAZ
fixUp(size); r=&,2meo
} 59O-"Sc[
} G[\TbPh
]q.%_
private int size=0; X%+lgm+
0_eqO'"
private int[] queue; {G Jl<G1
8f/KNh7#s
public int get() { QYMfxpiC
return queue[1]; 4/Y?eUQ
} ZRG Cy5Rk
+U2lwd!j
public void remove() { F)(^c
SortUtil.swap(queue,1,size--); {YgU23;q
fixDown(1); {2h*NFp
} 8u2k-_9
file://fixdown b)<WC$"
private void fixDown(int k) { .`}TND~
int j; tL$,]I$1+
while ((j = k << 1) <= size) { bGCC?}\
if (j < size %26amp;%26amp; queue[j] j++; J5G<Y*q
if (queue[k]>queue[j]) file://不用交换 A$=ny6
break; pM?~AYWb
SortUtil.swap(queue,j,k); }6@E3z]AMO
k = j; byxlC?q7
} } Bf@69
} 1ysfpX{=
private void fixUp(int k) { r8s>s6vm
while (k > 1) { uQIPnd(V
int j = k >> 1; u%~'+=
if (queue[j]>queue[k]) CefFUqo4
break; `(FjOd K
SortUtil.swap(queue,j,k); (oGYnN,2
k = j; 2y - QH
} c!ZZMCs
} '4 *0Pw
^OKm (
} x95s%29RS
KL'1)G"OH
} uge r:cD
qWhW4$7x
SortUtil： VcrMlcnO
ZaYiby@Ci
package org.rut.util.algorithm; YB"gLv?
9^XZ|`
import org.rut.util.algorithm.support.BubbleSort; .dU91> ~Ov
import org.rut.util.algorithm.support.HeapSort; |M;Nq@bRv
import org.rut.util.algorithm.support.ImprovedMergeSort; kG/1
import org.rut.util.algorithm.support.ImprovedQuickSort; \}$|Uo$O
import org.rut.util.algorithm.support.InsertSort; .o/|]d`%
import org.rut.util.algorithm.support.MergeSort; I{89chi
import org.rut.util.algorithm.support.QuickSort; K=N&kda
import org.rut.util.algorithm.support.SelectionSort; g>VtPS5 y
import org.rut.util.algorithm.support.ShellSort; V *@q< rQ
:^]Po$fl
/** G<?RH"RZr
* @author treeroot cg8/v:B
* @since 2006-2-2 k*C69
* @version 1.0 N|yA]dg[
*/ lwQ!sH[M
public class SortUtil { !igPyhi,hl
public final static int INSERT = 1; d~aTjf
public final static int BUBBLE = 2; FEk9a^Xyx
public final static int SELECTION = 3; hoFgs9
public final static int SHELL = 4; `,V&@}&"n
public final static int QUICK = 5; 2H`r:x<Z-
public final static int IMPROVED_QUICK = 6; b$'%)\('g
public final static int MERGE = 7; 7KlL%\
public final static int IMPROVED_MERGE = 8; ?ES{t4"
public final static int HEAP = 9; C1;uAw?\
}ekNZNcuM
public static void sort(int[] data) { (d&" @
sort(data, IMPROVED_QUICK); &`m.]RV
} spA|[\Nl
private static String[] name={ :$G^TD/n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <sC(a7i1
}; aG7Lm2{c"
12 )
private static Sort[] impl=new Sort[]{ 'gN[LERT
new InsertSort(), #X)DFAtb
new BubbleSort(), [\ku,yd%0
new SelectionSort(), ()|e xWW
new ShellSort(), YMw,C:a4
new QuickSort(), !\'w>y7
new ImprovedQuickSort(), O.dZ3!!+
new MergeSort(), q,sO<1wAT\
new ImprovedMergeSort(), SVa^:\"$[
new HeapSort() mCnl@
}; PlCw,=K8f
|Gq3pL<jkC
public static String toString(int algorithm){ "I=Lbh-`
return name[algorithm-1]; b|87=1^m[
} m<n+1
}D1?Z7p
public static void sort(int[] data, int algorithm) { s {*rBX8N
impl[algorithm-1].sort(data); JXuks`:Q
} =>S[Dh
M7qg\1L
public static interface Sort { qi@Nz=t#HJ
public void sort(int[] data); :2 \NG}
} vo#$xwm1
&x (D%+
public static void swap(int[] data, int i, int j) { g1XpERsSEV
int temp = data; [ !~8TF
data = data[j]; Cno[:iom
data[j] = temp; h9d*N9!;M
} UaG&HGg]!
} MNh:NFCRA