[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; V>D8l @
} AX($LIy9P
int i1=l; D$@5$./
int i2=mid+1; oGt,^!V1
for(int cur=l;cur<=r;cur++){ N~H!6N W
if(i1==mid+1) uH*moVw@5
data[cur]=temp[i2++]; U )kl!
else if(i2>r) o;#:%
data[cur]=temp[i1++]; wW &q)WOi
else if(temp[i1] data[cur]=temp[i1++]; OlRtVp1
else y7pwYRY
data[cur]=temp[i2++]; #gW"k;7P
} [$\KS_,Mn
} Gak@Z!|
B xAyjA6
} 3dO~Na`S
NM FgCL
改进后的归并排序: 6g*?(Y][
U]/iPG&_
package org.rut.util.algorithm.support; 2{U5*\FhVX
/q1k)4?E
import org.rut.util.algorithm.SortUtil; (\8IgQ{
TAL,(&[s
/** wrP3:!=
* @author treeroot gXJtk;
* @since 2006-2-2 /{6&99SJcc
* @version 1.0 _2Zc?*4
*/ ,~Y[XazT
public class ImprovedMergeSort implements SortUtil.Sort { g'X{
%f)%FN.S
private static final int THRESHOLD = 10; B*Z}=$1j
h2jrO9
/* n4XEyCrD
* (non-Javadoc) t,NE`LC
* pTB1I3=.u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %Ev)Hk
*/ ^O0trM>h-
public void sort(int[] data) { ?,}:)oA_
int[] temp=new int[data.length]; / jLb{Ky
mergeSort(data,temp,0,data.length-1); &s#OiF8
} 8Y"R@'~
Xr."C(`w
private void mergeSort(int[] data, int[] temp, int l, int r) { `y3*\l
int i, j, k; w`GjQIA
int mid = (l + r) / 2; *epK17i=
if (l == r) y$Fk0s*>
return; C>A} e6o
if ((mid - l) >= THRESHOLD) %OJ"@6A
mergeSort(data, temp, l, mid); F4NMq&_
else $bU.6
insertSort(data, l, mid - l + 1); y_``-F&Z
if ((r - mid) > THRESHOLD) V=gu'~
mergeSort(data, temp, mid + 1, r); lb{X6_.
else &( ZEs c
insertSort(data, mid + 1, r - mid); '7<^x>D|
\zh`z/=92
for (i = l; i <= mid; i++) { r}:Dg fn
temp = data; A(9$!%#+L
} EG8%X"p
for (j = 1; j <= r - mid; j++) { o\<JG?P
temp[r - j + 1] = data[j + mid]; '/s/o]'sUd
} WN $KS"b6}
int a = temp[l]; nt%fJ k
int b = temp[r]; DzbcLg%:W
for (i = l, j = r, k = l; k <= r; k++) { ~#jnkD
if (a < b) { ~OMo$qt`lP
data[k] = temp[i++]; "#:h#uRUb
a = temp; 9ec>#Vxx
} else { 6<%b}q9Mo
data[k] = temp[j--]; >]HvXEdNZ|
b = temp[j]; x*!*2{
} d(j g "@
} QFB2,k6jN
} G?^w <
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/** ?e%u[Q0
* @param data I^)_rOgM
* @param l %(S!/(LWW
* @param i [s[!PlazX
*/ {`Z=LLL
private void insertSort(int[] data, int start, int len) { kT%m`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9.:&u/e
} }R~C<3u\2
} ?Ld:HE
} Zbr1e5?
} /!_FE+
pJ x H
堆排序： cpPS8V
i)/#u+Y1P
package org.rut.util.algorithm.support; v5I5tzt*%H
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import org.rut.util.algorithm.SortUtil; uG+eF
<vzU}JA\
/** l$!Z};mw0E
* @author treeroot /VFQbJ+`
* @since 2006-2-2 K#N5S]2yb
* @version 1.0 W6)XMl}n
*/ t Kjk<
public class HeapSort implements SortUtil.Sort{ ivSpi?
_QtW)\)5\
/* (non-Javadoc) AHT(Z~C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3W[Ps?G
*/ 'N&s$XB,
public void sort(int[] data) { 1`1Jn*|TI
MaxHeap h=new MaxHeap(); mp0s>R
h.init(data); QZ5%nJme_
for(int i=0;i h.remove(); QvzE:]pyi
System.arraycopy(h.queue,1,data,0,data.length); m[w~h\FS
} (9)uZ-BF,
orEb+
private static class MaxHeap{ G&yF9s)Lvs
[3]h(D
void init(int[] data){ ZV!*ZpTe~
this.queue=new int[data.length+1]; km}E&ao
for(int i=0;i queue[++size]=data; b:&=W>r
fixUp(size); rD>q/,X=\
} bR=TGL&
} L @8[.
g:>dF#
private int size=0; 1!R:}r3t
<$%Y#I'zX
private int[] queue; CasFj9,
([hd
public int get() { O.?q8T)n82
return queue[1]; Y2>*' nU
} V/8yW3]Xy
(Jy >,~O
public void remove() { K st2.Yy
SortUtil.swap(queue,1,size--); n(\VP!u5r
fixDown(1); =1j`VJU9
} >&|/4`HSB
file://fixdown 68!=`49r>
private void fixDown(int k) { HTP~5J
int j; L;'v,s
while ((j = k << 1) <= size) { GV SVNT}I
if (j < size %26amp;%26amp; queue[j] j++; 9riKSp:5
if (queue[k]>queue[j]) file://不用交换 cs)z!
break; jhE3@c@pT
SortUtil.swap(queue,j,k); ,,(BW7(
k = j; +C(/.X Kz%
} }x:nhy`
} ?E7.x%n7X5
private void fixUp(int k) { jF%l\$)/
while (k > 1) { MtK5>mhZI`
int j = k >> 1; 0Yc#fD
if (queue[j]>queue[k]) ^ `Y1
break; N:rnH:g+:
SortUtil.swap(queue,j,k); f@J-6uQ7w
k = j; tJ9`Ys
} 4N{^niq7
} h+Tt+Q\
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} Amvl/bO
2aO.t
} 38O_PK
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SortUtil： L-(.v*
j*N:Kdzvl
package org.rut.util.algorithm; fwi(qx1=}
k-\RdX)E
import org.rut.util.algorithm.support.BubbleSort; .TetN}w
import org.rut.util.algorithm.support.HeapSort; /CN`U7:E
import org.rut.util.algorithm.support.ImprovedMergeSort; p/inATH
import org.rut.util.algorithm.support.ImprovedQuickSort; )%&~CW+
import org.rut.util.algorithm.support.InsertSort; )]5}d$83
import org.rut.util.algorithm.support.MergeSort; 7q[a8rUdh
import org.rut.util.algorithm.support.QuickSort; 4>W ov
import org.rut.util.algorithm.support.SelectionSort; cp>1b8l6?
import org.rut.util.algorithm.support.ShellSort; P ||:?3IH
'rQ>Z A_8
/** :;]iUjiC8
* @author treeroot mVuZ}`
* @since 2006-2-2 W{(q7>g
* @version 1.0 K=82fF(-
*/ S( r Fa
public class SortUtil { $.2#G"|
public final static int INSERT = 1; 7U\GX
public final static int BUBBLE = 2; 9vZD?6D,n
public final static int SELECTION = 3; zn'F9rWx>
public final static int SHELL = 4; Qs5^kddz=
public final static int QUICK = 5; hf~'EdU
public final static int IMPROVED_QUICK = 6; .`3O4]N[
public final static int MERGE = 7; 8=U0\<wT
public final static int IMPROVED_MERGE = 8; ?@i_\<A2
public final static int HEAP = 9; ``Wf%~
RrGFGn{
public static void sort(int[] data) { JXIxk"m
sort(data, IMPROVED_QUICK); #r}O =izi
} RHc-kggk!
private static String[] name={ r{T}pc>^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9=J+5V^qD<
}; AD=vYDR+
0//?,'.
private static Sort[] impl=new Sort[]{ [Grd?mc#
new InsertSort(), As;@T$G
new BubbleSort(), =-e`OHA
new SelectionSort(), ^"e|)4_5\
new ShellSort(), 5HZt5="+
new QuickSort(), #ONad0T;
new ImprovedQuickSort(), \Y0o~JD
new MergeSort(), 0 xUw}T6
new ImprovedMergeSort(), axSJ:j8
new HeapSort() q`l%NE
}; +;P8QZK6
+$-@8,F>
public static String toString(int algorithm){ ]b"Oy}ARW
return name[algorithm-1]; gxIGL-1M
} Pde|$!Jo
wsnR$FhQ`
public static void sort(int[] data, int algorithm) { H<|ilL'fX
impl[algorithm-1].sort(data); Y%FQ]Q=+
} McRAy%{z
zF9SZ#{a
public static interface Sort { _R,VNk
public void sort(int[] data); ' DZYN {}
} ;wi}6rF%[i
sO,%Ok1
public static void swap(int[] data, int i, int j) { b1(7<o
int temp = data; R aVOZ=^-
data = data[j]; 1VlRdDg
data[j] = temp; Df\~ ZWs!
} {{G`0i2KV
} 8!~8:?6n