[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; MG /,==
} tTN?r8
int i1=l; 'TTUN=y
int i2=mid+1; ~2d:Q6
for(int cur=l;cur<=r;cur++){ 8?*RIA.a
if(i1==mid+1) m~lpyAw
data[cur]=temp[i2++]; m%"uPv\
else if(i2>r) pq:7F
data[cur]=temp[i1++]; 0wFH!s/B
else if(temp[i1] data[cur]=temp[i1++]; 2Bk$ lx7
else ;Nr]X
data[cur]=temp[i2++]; AH4EtZC=W
} -`f04_@>d
} _U{([M>;
w#N?l!5
} -o+74=E8[?
$ n,Z
改进后的归并排序: F`nb21{0y&
QQe;1O
package org.rut.util.algorithm.support; 9s}Kl($
uY< H#k
import org.rut.util.algorithm.SortUtil; |3+m%;X
)2DQ>cm
/** XhdSFxW}
* @author treeroot xyH/e*a
* @since 2006-2-2 Z+pom7A"E
* @version 1.0 p"*y58
*/ o$C|J]%
public class ImprovedMergeSort implements SortUtil.Sort { ?R-9W+U%f
qzFQEepso
private static final int THRESHOLD = 10; #k<":O
_MWM;f`b
/* j#0j)k2Q
* (non-Javadoc) 7ZUiY
* y<XlRTy[}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +%N KQ'49I
*/ ;NV'W]
public void sort(int[] data) { L:M0pk{T
int[] temp=new int[data.length]; q{die[J
mergeSort(data,temp,0,data.length-1); PuxK?bwC
} k>E`s<3
d7cg&9+
private void mergeSort(int[] data, int[] temp, int l, int r) { !3oKmL5
int i, j, k; Wk^RA_
int mid = (l + r) / 2; mL~z~w*s
if (l == r) m-T~fJ
return; M,3wmW&d6
if ((mid - l) >= THRESHOLD) FFEfp.T1M
mergeSort(data, temp, l, mid); hNXBVIL<&
else W9t"aZor
insertSort(data, l, mid - l + 1); ha;l(U>
if ((r - mid) > THRESHOLD) "Lh
mergeSort(data, temp, mid + 1, r); PN$ .X"D8
else m}$+Hdk+7
insertSort(data, mid + 1, r - mid); BpO9As 1um
ZyR_6n>L$
for (i = l; i <= mid; i++) { z"DkFvA
temp = data; A>NsKWf{
} yBLUNIr
for (j = 1; j <= r - mid; j++) { }<MR`h1
temp[r - j + 1] = data[j + mid]; +:6Ii9GN
} Lt#'W
int a = temp[l]; Sx] T/xq
int b = temp[r]; i.iio-
for (i = l, j = r, k = l; k <= r; k++) { 'mdMq=VI
if (a < b) { 4c~>ci,N?(
data[k] = temp[i++]; kqvow3u
a = temp; ~un%4]U
} else { ?p[O%_Xf
data[k] = temp[j--]; r^HAaGpC
b = temp[j]; j2h[70fWC
} SW(q$i
} DhI>p0* T
} *.f2VQ~H
>+cVs:
/** ~9D~7UR
* @param data ^_p%Yv
* @param l d0er^ ~
* @param i %up}p/?
*/ ;52'}%5
private void insertSort(int[] data, int start, int len) { Jf:,y~mV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +rNkN:/L
} TrE3S'EU#R
} tn/T6C^)
} <XQ.A3SG!
} HTz+K6&
c\cZ]RZ
堆排序： MM{_Ur7Q
]*%+H|l
package org.rut.util.algorithm.support; f?Bj _z
1 [z'G)v
import org.rut.util.algorithm.SortUtil; h`MdKX$
Jd 3@cLCe-
/** 3+OsjZ
* @author treeroot PfW|77
* @since 2006-2-2 S+x_c4 T
* @version 1.0 <o:@dS
*/ [JTto!Ih$
public class HeapSort implements SortUtil.Sort{ N4^5rrkL
0vs0*;F;
/* (non-Javadoc) (7$$;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }dSFAKI2dM
*/ j!#OG
public void sort(int[] data) { CfT/R/L
MaxHeap h=new MaxHeap(); f1{z~i9@$
h.init(data); H*e'Cs/
for(int i=0;i h.remove(); ;~zNqdlH
System.arraycopy(h.queue,1,data,0,data.length); sDiHXDI_m
} s<T?pH
((DzUyK
private static class MaxHeap{ X=p"5hhfn
$v;dV@tB
void init(int[] data){ #]KgUc5B
this.queue=new int[data.length+1]; 8IY19>4'5J
for(int i=0;i queue[++size]=data; yOHXY&
fixUp(size); K <`>O, F
} A{,n;;
} 'Am-vhpm
rjojG59U>
private int size=0; 'u[%}S38
;\b@)E}
private int[] queue; L&w.j0fq
=_=*OEgO]
public int get() { yFIIX=NC
return queue[1]; /Ic[N&
} OHp5z? z
R"6;NPeo
public void remove() { 2z2`
SortUtil.swap(queue,1,size--); |w)5;uQ&\
fixDown(1); J=WB6zi
} setLdEi
file://fixdown o$_93<zc
private void fixDown(int k) { cqL(^R.
int j; E'dX)J9e$/
while ((j = k << 1) <= size) { 6* rcR]
if (j < size %26amp;%26amp; queue[j] j++; )&1!xF
if (queue[k]>queue[j]) file://不用交换 delf ]
break; r4knN 2:
SortUtil.swap(queue,j,k); f{Qp
k = j; ]W9B6G_
} 9R]](g#
} $iMC/Kym
private void fixUp(int k) { ku.A|+Tn
while (k > 1) { ,ECAan/@
int j = k >> 1; .gD km^
if (queue[j]>queue[k]) cx(2jk}6
break; LM,fwAX
SortUtil.swap(queue,j,k); !*a[jhx
k = j; [e4![G&y`
} 6$e]i|e
} G%hO\EO
wly>H]i'
} 8$~3ra
:1<~}*B@{
} pieT'mA
T_ ^C#>
SortUtil： v}`1)BUeF
#EwK"S~
package org.rut.util.algorithm; 9O;vUy)
@ ^.*$E5
import org.rut.util.algorithm.support.BubbleSort; ,/o(|sks
import org.rut.util.algorithm.support.HeapSort; sJ6a7A8)
import org.rut.util.algorithm.support.ImprovedMergeSort; {e9Y !oFg
import org.rut.util.algorithm.support.ImprovedQuickSort; @l>Xnqx)
import org.rut.util.algorithm.support.InsertSort; 8R/ *6S=&
import org.rut.util.algorithm.support.MergeSort; 7*'@qjTos
import org.rut.util.algorithm.support.QuickSort; rWr/p^~
import org.rut.util.algorithm.support.SelectionSort; yh!B!v'
import org.rut.util.algorithm.support.ShellSort; ks:{TA27
d.\PS9l
/** _t.FL@3e
* @author treeroot `p|[rS>
* @since 2006-2-2 %cj58zO|y
* @version 1.0 |\{Nfm=:%
*/ OOLe[P3J3
public class SortUtil { pG28M]\
public final static int INSERT = 1; JK^[{1 JI
public final static int BUBBLE = 2; Kq7C0)23
public final static int SELECTION = 3; 84Zgo=P}
public final static int SHELL = 4; 5; f\0<-
public final static int QUICK = 5; Tk+DPp^
public final static int IMPROVED_QUICK = 6; $c9=mjwH
public final static int MERGE = 7; )>$^wT
public final static int IMPROVED_MERGE = 8; ,>S+-L8
public final static int HEAP = 9; b;{h?xc6
oc;VIK)g]c
public static void sort(int[] data) { Hja^edLj
sort(data, IMPROVED_QUICK); ay[ZsQC
} cHEz{'1m
private static String[] name={ >Z"9rF2SW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +S0u=u65
}; ,>w}xWSYpG
pzSqbgfrQ
private static Sort[] impl=new Sort[]{ + (=I8s/
new InsertSort(), 1*c>I@I;
new BubbleSort(), h#O"Q+J9n
new SelectionSort(), )k~1,
new ShellSort(), <ge}9pU)o^
new QuickSort(), wT%"5:
new ImprovedQuickSort(), A;t zRe
new MergeSort(), }} #be
new ImprovedMergeSort(), -$L(y@%X^
new HeapSort() X7&U3v
}; @ RX`>r{_
|D(&w+(
public static String toString(int algorithm){ *[ #*n n
return name[algorithm-1]; ^Y<M~K972
} ?%;B`2 nDR
cuMc*i$w!
public static void sort(int[] data, int algorithm) { &CO|Y(+
impl[algorithm-1].sort(data); }{=8&gA0
} /&QQ p3
x_|>n<Z
public static interface Sort { qOgtGN}k
public void sort(int[] data); bQV("~#
} oVEAlBm^v
<4$YO-:E
public static void swap(int[] data, int i, int j) { X#7}c5^Y
int temp = data; PvuAg(?
data = data[j]; *k[kV
data[j] = temp; _Z.;u0Zp8
} khS/'b
} /x O{ .dr