[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; .6e5w1r63
} vlEd=H,LT
int i1=l; Vu~mi%UH
int i2=mid+1; ${6 ;]ye
for(int cur=l;cur<=r;cur++){ { F.Ihw
if(i1==mid+1) .'__ [|-{;
data[cur]=temp[i2++]; \W/cC'
else if(i2>r) +es.V /
data[cur]=temp[i1++]; V%o:Qa[a
else if(temp[i1] data[cur]=temp[i1++]; c9r2kc3cy{
else jUW{Z@{U
data[cur]=temp[i2++]; v,Ep2$
} zLf^O%zN
} oE-i`;\8
!Aj_r^[X`
} ,lL0'$k~
%S$P+B?
改进后的归并排序: /SlCcozFL~
IF5+&O
package org.rut.util.algorithm.support; 9R'rFI
\iu2rat^
import org.rut.util.algorithm.SortUtil; ',J3^h!b
PuUqWW'^
/** cN&b$8O=%
* @author treeroot y$4,r4cmR|
* @since 2006-2-2 ]C5JP~#z
* @version 1.0 O23f\pm&
*/ I#uJdV|x
public class ImprovedMergeSort implements SortUtil.Sort { Ji%T|KR_
&qrH
private static final int THRESHOLD = 10; "z@qG]#5
(iBBdB
/* ]9;WM.
* (non-Javadoc) N9,n/t
* Y,>])R[4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l#]Z?zW.
*/ ;v8,r#4
public void sort(int[] data) { ;}^Pfm8
int[] temp=new int[data.length]; J~n{gT<L
mergeSort(data,temp,0,data.length-1); 'T+3tGCy+
} P(A%z2Ql
0($MN]oZa
private void mergeSort(int[] data, int[] temp, int l, int r) { 15Yy&9D
int i, j, k; s- g[B(
int mid = (l + r) / 2; W!GgtQw{F
if (l == r) ]%shs
return; 3&x_%R
if ((mid - l) >= THRESHOLD) @kI^6(.
mergeSort(data, temp, l, mid); Jw;J$ u!d
else i1|-
insertSort(data, l, mid - l + 1); ffuV$#
if ((r - mid) > THRESHOLD) lEQn2+
mergeSort(data, temp, mid + 1, r); @}aK\
else $n(@hT>?
insertSort(data, mid + 1, r - mid); S\g8(\u
s{<rc>
for (i = l; i <= mid; i++) { MEq ()}7P
temp = data; 0D$+WX
} 6j_ A{*~Ng
for (j = 1; j <= r - mid; j++) { LT2mwJl
temp[r - j + 1] = data[j + mid]; WmOd1
} fv<($[0
int a = temp[l]; f8'&(-
int b = temp[r]; 9I^_n+E
for (i = l, j = r, k = l; k <= r; k++) { @f{)]I +f
if (a < b) { SGjaH8z
data[k] = temp[i++]; ]7'Q2OU7
a = temp; n#Z6d`
} else { U/|B IF
data[k] = temp[j--]; LDwu?"P!
b = temp[j]; I?l*GO+pz
} F!^ Y!Y@H
} jG{xFz>x
} pwU]r
Y @pkfH
/** 7m@pdq5Ub
* @param data {*>$LlL
* @param l YR~g&E#U^
* @param i %Cb8vYz~
*/ :jB(!XH
private void insertSort(int[] data, int start, int len) { s+Ln>c'|o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w;r-TLf
} ?ew^%1!W.
} f,`FbT
} 3cQTl5,
} v|QFUa`
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堆排序： VY~WkSi[<
1sn!!
package org.rut.util.algorithm.support; v_)cp9d]
^>[DG]g
import org.rut.util.algorithm.SortUtil; q& 4Z.(
t(Iy[-
/** !>9*$E |
* @author treeroot *"j_3vAx
* @since 2006-2-2 G0y%_"[
* @version 1.0 B^$l]cvZ
*/ SZvw>=)a
public class HeapSort implements SortUtil.Sort{ M8S4D&vpD4
fs>0{
/* (non-Javadoc) $T]1<3\G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I2K52A+
*/ ~g>15b3
public void sort(int[] data) { _.Uz!2
MaxHeap h=new MaxHeap(); n1buE1r?
h.init(data); =eTI@pN`
for(int i=0;i h.remove(); +apIp(E+
System.arraycopy(h.queue,1,data,0,data.length); "LXLUa03
} 98o;_tU'
G?>~w[#mQR
private static class MaxHeap{ /i DS#l\0
O&d(FJZ
void init(int[] data){ ukq9Cjs
this.queue=new int[data.length+1]; ( 9dV%#G\
for(int i=0;i queue[++size]=data; wyAqrf
fixUp(size); EX8]i,s|E
} 7fnKe2MM
} kDO6:sjR7
C'7W50b
private int size=0; :qgdn,Me
6TPcG dZ
private int[] queue; J,m.LpY
/x-Ja[kL
public int get() { UkXc7D^jwm
return queue[1]; ><`.(Z5c
} gtjgC0
EsA^P2?_+
public void remove() { Q7c_;z_
SortUtil.swap(queue,1,size--); bp$8hUNYz-
fixDown(1); alHwN^GhP
} },[S9I`p
file://fixdown uvD6uIW<
private void fixDown(int k) { %,~; w0
int j; JR7~|ov
while ((j = k << 1) <= size) { $.V(_
if (j < size %26amp;%26amp; queue[j] j++; as o8
if (queue[k]>queue[j]) file://不用交换 LFGu|](
break; ,,BNUj/:
SortUtil.swap(queue,j,k); lh?mN3-*
k = j; 0FTiTrTn
} 2Ni{wg"
} VFA1p)n
private void fixUp(int k) { s/Q}fW$ex
while (k > 1) { -uO< ]
int j = k >> 1; [HQ17
if (queue[j]>queue[k]) 9n8;eE08
break; PMXnupt
SortUtil.swap(queue,j,k); "NC(^\l/
k = j; UPN2p&gM
} nwcT8b87J
} mpr["C"l
:GL|:
} 36Wuc@<H
F)DL/';
} H@aCo(#
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SortUtil： ]e?*7T]
r OB\u|Pg
package org.rut.util.algorithm; nV']^3b
IwWo-WN7.
import org.rut.util.algorithm.support.BubbleSort; /_jApZz
import org.rut.util.algorithm.support.HeapSort; T("Fh}
import org.rut.util.algorithm.support.ImprovedMergeSort; NG5H?hVN=
import org.rut.util.algorithm.support.ImprovedQuickSort; 5bZ`YO
import org.rut.util.algorithm.support.InsertSort; 2$1rS}}
import org.rut.util.algorithm.support.MergeSort; Ej.D!@
import org.rut.util.algorithm.support.QuickSort; :nZ*x=aq
import org.rut.util.algorithm.support.SelectionSort; jN5Sc0|b
import org.rut.util.algorithm.support.ShellSort; |G%MiYd
dF1Bo
/** OQ!mL3f
* @author treeroot Hyee#fB
* @since 2006-2-2 1egryp
* @version 1.0 -P'>~W,~
*/ 39~fP)
public class SortUtil { q &jW{
public final static int INSERT = 1; tQ2*kE
public final static int BUBBLE = 2; 8oA6'%.e
public final static int SELECTION = 3; WNL3+
public final static int SHELL = 4; -U*XA
public final static int QUICK = 5; xZ9y*Gv\=
public final static int IMPROVED_QUICK = 6; \V: _Zs
public final static int MERGE = 7; A9lqVMp64
public final static int IMPROVED_MERGE = 8; rZpc"<U
public final static int HEAP = 9; YrZAy5\
hk,Q=};
public static void sort(int[] data) { ?cg+RNI
sort(data, IMPROVED_QUICK); If4YqBG
} M6DyOe<
private static String[] name={ G9VzVx#T#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CqrmdWN
}; .v;2Q7X
h)A+5^:^
private static Sort[] impl=new Sort[]{ 70KXBu<6
new InsertSort(), {v]>sn;P1
new BubbleSort(), >O\-\L
new SelectionSort(), 9=JU&/!
new ShellSort(), \vm'D'9
new QuickSort(), c#{<| .
new ImprovedQuickSort(), 8,kbGlSD
new MergeSort(), #+_OyZ*
new ImprovedMergeSort(), vZ|-VvG
new HeapSort() I;mtyS
}; 4] DmgOru%
p1Lx\
public static String toString(int algorithm){ EQ=Enw1[
return name[algorithm-1]; \=5CNe
} [N7[%iQ%
AvV.faa
public static void sort(int[] data, int algorithm) { p=405~
impl[algorithm-1].sort(data); WtlIrdc
} C<n.C*o
Ho"FB|e
public static interface Sort { 9"V27"s
public void sort(int[] data); 8E0Rg/DnT
} KE5f`h
x$s#';*
public static void swap(int[] data, int i, int j) { _=}Y lR
int temp = data; H56e#:[$
data = data[j]; Ir}&|"~H
data[j] = temp; Nw|Lrn*h!
} rp1u
} IFv2S|