[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; k:W=5{[
} m/cx|b3hqv
int i1=l; l; */M.B
int i2=mid+1; B piEAwh
for(int cur=l;cur<=r;cur++){ S[ i$e
if(i1==mid+1) \:C%> .VG
data[cur]=temp[i2++]; rC~_:uXtE
else if(i2>r) ,Qga|n8C
data[cur]=temp[i1++]; mJ/^BT]
else if(temp[i1] data[cur]=temp[i1++]; QK,=5~IJ
else C?bXrG\
data[cur]=temp[i2++]; m2wp m_vV#
} 5NFq7&rJ6
} e-1;dX HL
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} +~@7" |d
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改进后的归并排序: K T%i,T
x!Y(Y=i>
package org.rut.util.algorithm.support; wbo{JQ
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import org.rut.util.algorithm.SortUtil; 3@%BA(M
pFG]IM7o/u
/** 6 bYC
* @author treeroot Al)lWD}j2g
* @since 2006-2-2 }7otuO(pRo
* @version 1.0 se}pdL}
*/ 0oXK&Z
public class ImprovedMergeSort implements SortUtil.Sort { c,+iU R<
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private static final int THRESHOLD = 10; Bi %Z2/
?]759,Q3L
/* ;B,nzx(L
* (non-Javadoc) $gXkx D
* ^f!Zr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xq[:GUnt
*/ $b&BH'*'~
public void sort(int[] data) { ,M| QN*
int[] temp=new int[data.length]; PEK.Kt\M
mergeSort(data,temp,0,data.length-1); GP0[Y
} <.y;&a o
]:[)KZ~
private void mergeSort(int[] data, int[] temp, int l, int r) { p`shYyE
int i, j, k; n U+pnkMj
int mid = (l + r) / 2; &h98.A*&
if (l == r) >aNbp
return; B:B0p+$I
if ((mid - l) >= THRESHOLD) nD^{Q[E6=
mergeSort(data, temp, l, mid); kq-mr
else }(8D!XgWa
insertSort(data, l, mid - l + 1); z7D*z8,i
if ((r - mid) > THRESHOLD) b\<lNE!L
mergeSort(data, temp, mid + 1, r); (jD'+ "?
else zZS>+O
insertSort(data, mid + 1, r - mid); J r=REa0
oHv{Y
for (i = l; i <= mid; i++) { $w 5#2Za
temp = data; 0[_O+u
} 9/@FADh
for (j = 1; j <= r - mid; j++) { ~Rx~g
temp[r - j + 1] = data[j + mid]; ,+swH;=7#r
} |?4~T:
int a = temp[l]; ~xsb5M5
int b = temp[r]; 8#NIs@DJ
for (i = l, j = r, k = l; k <= r; k++) { b|\{ !N]
if (a < b) { z(8)1#(n7
data[k] = temp[i++]; h0'8NvalQ
a = temp; dm/-}
} else { LC~CPV'F
data[k] = temp[j--]; tuL\7 (R
b = temp[j]; s{x*~M$vt
} cij]&$;Q
} K|P9uHD
} uK+9gTv
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/** }z9I`6[
* @param data T%;k%
* @param l ]{q-Y<{"
* @param i Y^*Lh/:h
*/ A&X
private void insertSort(int[] data, int start, int len) { %OezaNOtm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :pL1F)-*
} r_qncy,F
} ^=4I|+P,6.
} {ziYd;Ys1
} UBUB/NY
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堆排序： o>/uW8
s= -WB0E
package org.rut.util.algorithm.support; i} NkHEK
nm{'HH-4
import org.rut.util.algorithm.SortUtil; \FY/eQ*07
+R{A'Yl[(
/** yH0yO*RZ
* @author treeroot v%69]a-T
* @since 2006-2-2 e{qp!N1!
* @version 1.0 +j)-L \
*/ 2fHIk57jP
public class HeapSort implements SortUtil.Sort{ !9ceCnwbNN
IL8'{<lM
/* (non-Javadoc) ue^?/{OuT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 42b=z//;
*/ t?Njw7
public void sort(int[] data) { *Dd(+NI
MaxHeap h=new MaxHeap(); ]*kP>
h.init(data); )eTnR:=
for(int i=0;i h.remove(); nsr _\F\
System.arraycopy(h.queue,1,data,0,data.length); @4W\RwD
} di)noQXkB-
L:k@BCQM
private static class MaxHeap{ 7>W+Uq
9}'l=b:Jms
void init(int[] data){ /:*R -VdF
this.queue=new int[data.length+1]; n##w[7B*
for(int i=0;i queue[++size]=data; /jK17}j
fixUp(size); it/C y\f
} ]XpU'/h>q;
} }R(0[0NQe-
~]6Oz;~<3
private int size=0; dctA`W@:-
~,M;+T}[r
private int[] queue; Kc-A-P &Ry
o%N0K
public int get() { I49=ozPP
return queue[1]; n41\y:CAo
} {$u@6& B
gs`27Gih
public void remove() { FzsS~C$wH{
SortUtil.swap(queue,1,size--); K_<lO,[S
fixDown(1); Bcd0
} lhIr]'?l
file://fixdown c!(~BH3p
private void fixDown(int k) { {8>_,z^P)
int j; iBPdCp%]`
while ((j = k << 1) <= size) { bCY^.S-
if (j < size %26amp;%26amp; queue[j] j++; q)z1</B-
if (queue[k]>queue[j]) file://不用交换 t<EX#_i,
break; /FNj|7s
SortUtil.swap(queue,j,k); C7fi1~
k = j; wZ\e3H z
} Li<266#A!
} UmP?}Xw6
private void fixUp(int k) { 4<eJ
while (k > 1) { zYgK$u^H
int j = k >> 1; 4o)\DB?!
if (queue[j]>queue[k]) ?G%, k LJJ
break; E%J7jA4
SortUtil.swap(queue,j,k); {ZBb.$}RC
k = j; yW6[Fpw
} a s<q
} rTH[?mkf4
?XTg%U
} |]2eGrGj4
3Oig/KZ
} Yf2+@E
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SortUtil： =-1^K
5sV/N] !
package org.rut.util.algorithm; ][>M<J
'mY,>#sT
import org.rut.util.algorithm.support.BubbleSort; {]/Jk07
import org.rut.util.algorithm.support.HeapSort; Q,M/R6i-
import org.rut.util.algorithm.support.ImprovedMergeSort; 2dV\=vd
import org.rut.util.algorithm.support.ImprovedQuickSort; 83 ^,'Z
import org.rut.util.algorithm.support.InsertSort; 48"Y-TV
import org.rut.util.algorithm.support.MergeSort; !\D]\|Bo
import org.rut.util.algorithm.support.QuickSort; iw]BQjK
import org.rut.util.algorithm.support.SelectionSort; ;6&=]I
import org.rut.util.algorithm.support.ShellSort; Y$`hudJ&
dO4U9{+
/** c_8mQ
* @author treeroot w$_'xX(
* @since 2006-2-2 E*!zJ,@8
* @version 1.0 *IO;`k q,;
*/ k @/SeE
public class SortUtil { Wp9 2sm+
public final static int INSERT = 1; |yl0}.()
public final static int BUBBLE = 2; 5\*wX.wp
public final static int SELECTION = 3; 2"{]A;@
public final static int SHELL = 4; tU~H@'
public final static int QUICK = 5; <0,ah4C
public final static int IMPROVED_QUICK = 6; 'y@ 2,9v
public final static int MERGE = 7; m*Lv,yw %a
public final static int IMPROVED_MERGE = 8; `))J8j"
public final static int HEAP = 9; f6_|dvY3
cwD*>[j
public static void sort(int[] data) { t%YX-@
sort(data, IMPROVED_QUICK); /Geks/
} Qmc;s{-r;
private static String[] name={ Qj~W-^/ -
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (9[C0eS
}; G>{:D'#
p$!+2=)gY
private static Sort[] impl=new Sort[]{ s?\9i6
new InsertSort(), fOjt` ~ToI
new BubbleSort(), d\<aJOi+-
new SelectionSort(), q ]R @:a/
new ShellSort(), (LvOsr~
new QuickSort(), *p5T
new ImprovedQuickSort(), h'q0eqYeu)
new MergeSort(), _R<V8g1f
new ImprovedMergeSort(), !m O] zn
new HeapSort() [F-u'h< *l
}; >p#d;wK4_
U@t?jTMBkO
public static String toString(int algorithm){ VEYKrZA
return name[algorithm-1]; L"vG:Mq@D
} ^)P5(fJ
I8oKa$RF
public static void sort(int[] data, int algorithm) { AiHDoV+-
impl[algorithm-1].sort(data); LGgx.Z
} ;NVTn<Uj
wTAEJ{p
public static interface Sort { xp;8p94
public void sort(int[] data); w#bbm'j7r
} `r0 qn'*
n7!Lwq2
public static void swap(int[] data, int i, int j) { lJQl$Wx^
int temp = data; snzH}$Ls
data = data[j]; WMz|FFKVY
data[j] = temp; 1B]wSvP@
} d.(]V2X.J
} =d4',[O