[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; a+LK~mC*
} ,HDhP
int i1=l; x]wi&
int i2=mid+1; `e'wWV
for(int cur=l;cur<=r;cur++){ FA,n>
if(i1==mid+1) H1U$ApD
data[cur]=temp[i2++]; bQ3<>e\%B
else if(i2>r) ^O7sQ7V"f=
data[cur]=temp[i1++]; j$Ndq(<tG
else if(temp[i1] data[cur]=temp[i1++]; s*gqKQ;
else HQ"T>xb
data[cur]=temp[i2++]; 'm*W<
} u $-&Im<
} 2EM6k|l5
kB@gy}
} Lm}.+.O~d
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改进后的归并排序: AAa7)^R
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package org.rut.util.algorithm.support; }@6Ze$>
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import org.rut.util.algorithm.SortUtil; 4$VDJ
5OWyxO3{
/** )e0kr46
* @author treeroot P@UE.0NYX
* @since 2006-2-2 "v?F4&\ 8
* @version 1.0 )I*(yUj
*/ eV}"L:bgJ
public class ImprovedMergeSort implements SortUtil.Sort { B\R X
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private static final int THRESHOLD = 10; 1#3|PA#>
6ZE`'pk<
/* =At" Q6-O
* (non-Javadoc) %R?7u'=~
* 3\}u#/Vb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )lLeL#]FLO
*/ P x Q]$w
public void sort(int[] data) { !aUYidd
int[] temp=new int[data.length]; v*Gd=\88
mergeSort(data,temp,0,data.length-1); vzs4tkG
} fWJpy#/^*K
L~/,;PHN
private void mergeSort(int[] data, int[] temp, int l, int r) { f$:Y'$Z1
int i, j, k; 5B)&;[
int mid = (l + r) / 2; 39O rY
if (l == r) 3 orZBT
return; I]d-WTd
if ((mid - l) >= THRESHOLD) w.58=Pr
mergeSort(data, temp, l, mid); 'MW%\W;
else M *w{PjU
insertSort(data, l, mid - l + 1); PY_8*~Z
if ((r - mid) > THRESHOLD) 4r4 #u'Om
mergeSort(data, temp, mid + 1, r); T5T%[Gv
else a6vej
insertSort(data, mid + 1, r - mid); _ab8z]H
iwMxTty
for (i = l; i <= mid; i++) { A'`F Rx(
temp = data; F<{,W-my `
} Az y`4
for (j = 1; j <= r - mid; j++) { .g}N@
temp[r - j + 1] = data[j + mid]; BNJ0D
} Z:^#9D{
int a = temp[l]; (rhlK} C
int b = temp[r]; o}QP+
for (i = l, j = r, k = l; k <= r; k++) { eZa7brC|
if (a < b) { V5$Gb6?K
data[k] = temp[i++]; plPPf+\
a = temp; rkji#\_-FV
} else { "XxmiK
data[k] = temp[j--]; ^cNuEF9
b = temp[j]; rM.Pc?Z
} _fZec+oM
} h(yFr/
} A^FkU
hNh!H<}|m8
/** D+:s{IcL<
* @param data nuWQ3w p[e
* @param l VK*_pEV,}
* @param i RK-bsf
*/ F8<G9#%s\
private void insertSort(int[] data, int start, int len) { 'V^M+ng
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >k`qPpf&
} }=v4(M`%
} ~vt*%GN3
} w( SY
} A^M]vk%dg
bvh#Q_
堆排序： $"NH{%95}
hfI=9x/
package org.rut.util.algorithm.support; zZPWE"u}
6bUP]^d
import org.rut.util.algorithm.SortUtil; 0,~s0]h0V
sAU%:W{
/** &'i_A%V
* @author treeroot bL* b>R[x
* @since 2006-2-2 3.#L
* @version 1.0 w;}5B~).
*/ Nb:j]U
public class HeapSort implements SortUtil.Sort{ AJ>E\DK0]
c-JXWNz
/* (non-Javadoc) `XE>Td>Bs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Y"S4<"R
*/ 0cKsGDm
public void sort(int[] data) { 2;T?ry7
MaxHeap h=new MaxHeap(); ?bM%#x{e
h.init(data); Uf+y$n-
for(int i=0;i h.remove(); TYD( 6N
System.arraycopy(h.queue,1,data,0,data.length); !m:WoQ/
} ;"IWm<]h;-
Uv[a ~'
private static class MaxHeap{ Hy:x.'i
$+J39%Y!^
void init(int[] data){ /9kxDbj
this.queue=new int[data.length+1]; XdThl
for(int i=0;i queue[++size]=data; 7.VP7;jys
fixUp(size); ]tu OWR
} M887 Q'HSi
} k-3;3Mq
Q8Ek}O\MC
private int size=0; 5@1h^wv
*JX$5bZsI
private int[] queue; &Qda|
]\K?%z
public int get() { l=9D!64
return queue[1]; tH;9"z# ~
} %8I^&~E1
G"&$7!6[Y
public void remove() { gYN;Fu-9Z
SortUtil.swap(queue,1,size--); ^k%+ao
fixDown(1); l opl
} gzi=+oJ|4
file://fixdown ?;](;n#lU
private void fixDown(int k) { )|v du
int j; G3|23G.~)(
while ((j = k << 1) <= size) { En7+fQ
if (j < size %26amp;%26amp; queue[j] j++; 0^Ldw)C"
if (queue[k]>queue[j]) file://不用交换 **__&Xp1
break; )MIw/
SortUtil.swap(queue,j,k); HLz<C
k = j; ha|2u(4
} X~m57bj
} :CM-I_6
private void fixUp(int k) { p&Nav,9x
while (k > 1) { +&"W:Le:
int j = k >> 1; &u|t{C#0
if (queue[j]>queue[k]) =.S2gO >
break; 2u_=i$xW
SortUtil.swap(queue,j,k); gYbvCs8O!
k = j; wT+60X'
} YhglL!pC
} l2W+VBn6
}` `oojz
} a9lYX*:
Ke@Bf
} ]b}3f<
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SortUtil： yD3vq}U!
}mp`!7?>O
package org.rut.util.algorithm; l]DRJ
oIOeX1$V
import org.rut.util.algorithm.support.BubbleSort; B> i^w1
import org.rut.util.algorithm.support.HeapSort; N%:uOX8{
import org.rut.util.algorithm.support.ImprovedMergeSort; 7.NL>:lu
import org.rut.util.algorithm.support.ImprovedQuickSort; JYjc^m
import org.rut.util.algorithm.support.InsertSort; 1*9Yy~w
import org.rut.util.algorithm.support.MergeSort; (AA@sN
import org.rut.util.algorithm.support.QuickSort; moVf(7
import org.rut.util.algorithm.support.SelectionSort; :FSg%IUX
import org.rut.util.algorithm.support.ShellSort; 4V@0L
!#]kzS0
/** EX<1hAw
* @author treeroot o>]w76A^(
* @since 2006-2-2 ]igCV
* @version 1.0 "e\73?P
*/ O+XQP!T
public class SortUtil { oKSW:A
public final static int INSERT = 1; AS0(NlV
public final static int BUBBLE = 2; _kOuD}_|
public final static int SELECTION = 3; i-0AcN./p
public final static int SHELL = 4; T06w`'aL
public final static int QUICK = 5; <5]_u:
public final static int IMPROVED_QUICK = 6; 4mBM5Tv
public final static int MERGE = 7; UlN}SddI9
public final static int IMPROVED_MERGE = 8; L}8 }Pns?&
public final static int HEAP = 9; #9"lL1
b N>Ar
public static void sort(int[] data) { /mE:2K]C
sort(data, IMPROVED_QUICK); 25, [<Ao
} ;ACeY
private static String[] name={ {QK9pZB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k]& I(VQ"
}; Obc,
.*FlB>1jy
private static Sort[] impl=new Sort[]{ /%?bO-
new InsertSort(), >)+U^V
new BubbleSort(), uTbMp~cYB
new SelectionSort(), *qMjoP,
new ShellSort(), k3OnvnJb
new QuickSort(), >>J!|
new ImprovedQuickSort(), OB,T>o@
new MergeSort(), N9)ERW2`*
new ImprovedMergeSort(), /$vX1T
new HeapSort() QBoX3w=
}; @J@bD+Q+0
#lVSQZO~a
public static String toString(int algorithm){ N/^[c+J[E
return name[algorithm-1]; l%2B4d9"v
} 1d.>?^uE
wL0"1Ya
public static void sort(int[] data, int algorithm) { kgmb<4p
impl[algorithm-1].sort(data); Eh_[8:dK
} nzYFa J+
jaux:fU
public static interface Sort { dnPr2oI?I
public void sort(int[] data); t.O4-+$ig
} /s:akLBaD
>273V+dy
public static void swap(int[] data, int i, int j) { Yu^}
int temp = data; v g tJ+GjN
data = data[j]; [iSLn3XXRX
data[j] = temp; x~yd/ R
} [qt^gy)
} v#sx9$K T