[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; 0t}&32lL&
} Qtn%h:i S~
int i1=l; m_1BB$lyP2
int i2=mid+1; u:&Lf
for(int cur=l;cur<=r;cur++){ ,(CIcDJ2U_
if(i1==mid+1) j*N:Kdzvl
data[cur]=temp[i2++]; SgPvQ'\
else if(i2>r) `}fwR
data[cur]=temp[i1++]; Zae$M0)
else if(temp[i1] data[cur]=temp[i1++]; +tPqU6
else Gd%E337d
data[cur]=temp[i2++]; \py \rI
} qU,u(El
} gEU|Bx/!=
[D%5Fh\0
} + %07J6
o@KK/f
改进后的归并排序: weky 5(:
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package org.rut.util.algorithm.support; *R6Ed
%2D9]L2Up
import org.rut.util.algorithm.SortUtil; &?#G)suP
\4OX]{
/** nB1[OB{
* @author treeroot <)\
* @since 2006-2-2 _]whHS+
* @version 1.0 f?A1=lm~
*/ qx~-(|s`H
public class ImprovedMergeSort implements SortUtil.Sort { nuip
>ps=z$4j*
private static final int THRESHOLD = 10; XNJPf) T
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/* 89[5a
* (non-Javadoc) yy%'9E ldc
* 2=PX1kI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5dE@ePO[/9
*/ OF)G2>t
public void sort(int[] data) { lef,-{X-
int[] temp=new int[data.length]; 6RLYpQ$+
mergeSort(data,temp,0,data.length-1); r{T}pc>^
} 9=J+5V^qD<
LzW8)<N
private void mergeSort(int[] data, int[] temp, int l, int r) { jLRh/pbz4
int i, j, k; ROyG+dUy
int mid = (l + r) / 2; OJGEX}3'
if (l == r) uwcm%N;I"
return; "Vg1'd}f
if ((mid - l) >= THRESHOLD) #ONad0T;
mergeSort(data, temp, l, mid); 1sqBBd"=PY
else O#g'4 S
insertSort(data, l, mid - l + 1); ' R!pc
if ((r - mid) > THRESHOLD) ,u1Yn}
mergeSort(data, temp, mid + 1, r); .I"Qu:``
else ke sg]K
insertSort(data, mid + 1, r - mid); a9ko3L
V kA$T8
for (i = l; i <= mid; i++) { s^@?+<4:
temp = data; _qq> 43
} 3$u3ssOL
for (j = 1; j <= r - mid; j++) { iz&$q]P8
temp[r - j + 1] = data[j + mid]; f.%mp$~T
} L|wD2iw
int a = temp[l]; \{HbL,s
int b = temp[r]; G^`IfF-j
for (i = l, j = r, k = l; k <= r; k++) { SM;*vkwz~
if (a < b) { QgZwU$`p0
data[k] = temp[i++]; yM*-em
a = temp; :ub 4p4h*
} else { ] rP^
data[k] = temp[j--]; ;#F/2UgHB
b = temp[j]; -bN;nSgb
} INi9`M.h
} _.9):i2<SF
} \>T+\?M
</UUvMf"
/** g>m)|o'
* @param data pSjJ u D
* @param l Kw`{B3"
* @param i |Va*=@&6J
*/ e;+6U"Jx*
private void insertSort(int[] data, int start, int len) { ,N[N;Uoj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qqL :#]lV5
} F;4*,Ap
} Mbj{C
} 9{D u)k
} Tz\PQ)!
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堆排序： "!ZQ`yl
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package org.rut.util.algorithm.support; #.<Uy."z2
-8HK_eQn
import org.rut.util.algorithm.SortUtil; J`E,Xw>2
kPhdfF*Q
/** (Dy6I;S
* @author treeroot DjyqQyq~
* @since 2006-2-2 jGg,)~)Y
* @version 1.0 <EhOIN7@*D
*/ y*F !k{P
public class HeapSort implements SortUtil.Sort{ 04K[U9W3
$?_/`S13
/* (non-Javadoc) .3X5~OH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zBQV2.@
*/ _Sq*m=
public void sort(int[] data) { /C[Q?
MaxHeap h=new MaxHeap(); 86*9GS?U(
h.init(data); KKBrw+)AJ
for(int i=0;i h.remove(); sf([8YUd
System.arraycopy(h.queue,1,data,0,data.length); i/vo
} x0KW\<k
ww}4
private static class MaxHeap{ syJLcK+e
- w{`/
void init(int[] data){ D6$*#D3U
this.queue=new int[data.length+1]; `rLcJcW
for(int i=0;i queue[++size]=data; ag_*Z\
fixUp(size); 1fK]A*{p
} J~]Y
} _%@dlT?
=bBV A0y
private int size=0; [!~=m
2;wpD2
private int[] queue; &<=?O a
9-W3}4'e
public int get() { AMw#_8Y
return queue[1]; %eE0a4^".
} 5%_aN_1?ef
] 6X;&=H
public void remove() { `f[
SortUtil.swap(queue,1,size--); g@O H,h/
fixDown(1); y+aKk6(_W
} :`>$B?x+
file://fixdown f:K>o.
private void fixDown(int k) { e7Sp?>-d
int j; j|KjQ'9
while ((j = k << 1) <= size) { 6!`GUU
if (j < size %26amp;%26amp; queue[j] j++; ELN1F0TneH
if (queue[k]>queue[j]) file://不用交换 %/4_|.8u
break; 2dyS_2u
SortUtil.swap(queue,j,k); +n%d,Pz
k = j; /V{1Zw=
} J2Mq1*Vpq
} O**~ Tj
private void fixUp(int k) { N>H#Ew@2U
while (k > 1) { oj(st{,
int j = k >> 1; 2<T/N
if (queue[j]>queue[k]) [[#R ry
break; l;SXR <EU
SortUtil.swap(queue,j,k); s&4&\Aq}x#
k = j; *EwDwS$$
} <}p]0iA
} 6lPuYEmT
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} 8RI'Fk{
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} n)j0h-
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SortUtil： P6I<M}p
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package org.rut.util.algorithm; sU+8'&vBp
;X N Ahg7
import org.rut.util.algorithm.support.BubbleSort; >V>`}TIH
import org.rut.util.algorithm.support.HeapSort; jLA)Y [h
import org.rut.util.algorithm.support.ImprovedMergeSort; 9X&=?+f
import org.rut.util.algorithm.support.ImprovedQuickSort; ?t/G@
import org.rut.util.algorithm.support.InsertSort; Hr7?#ZX;e
import org.rut.util.algorithm.support.MergeSort; ?iZM.$![
import org.rut.util.algorithm.support.QuickSort; D4N(FZ0~
import org.rut.util.algorithm.support.SelectionSort; !' 0PM[
import org.rut.util.algorithm.support.ShellSort; (hBph+
#+N_wIP4
/** w~q ]&
* @author treeroot \:g\?[
* @since 2006-2-2 {b'
* @version 1.0 9q+W>wt
*/ VJP#
public class SortUtil { 2rW9ja
public final static int INSERT = 1; A0Q`Aqs
public final static int BUBBLE = 2; :7i x`C2
public final static int SELECTION = 3; U)M&AYb
public final static int SHELL = 4; *kpP)\P
public final static int QUICK = 5; XDAP[V
public final static int IMPROVED_QUICK = 6; }.pqV X{d
public final static int MERGE = 7; ACy}w?D<
public final static int IMPROVED_MERGE = 8; 2$MoKOx8$
public final static int HEAP = 9; d'&OEGb<
1KY0hAx
public static void sort(int[] data) { %wXjP`#
sort(data, IMPROVED_QUICK); omGzyuPF
} F3K<-JK+
private static String[] name={ s)fahc(@E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rc3!u^?u
}; 6.a5%:
8AuE:=?,,
private static Sort[] impl=new Sort[]{ OSfT\8YA
new InsertSort(), Sa%%3_&
new BubbleSort(), IdMwpru(
new SelectionSort(), .zl[nx[9"D
new ShellSort(), g4Q' Fub+I
new QuickSort(), Q"D5D rj
new ImprovedQuickSort(), 6K )K%a,9
new MergeSort(), Phk3Jv
new ImprovedMergeSort(), XI|k,Ko<
new HeapSort() !*L)v
}; S~ Z<-@S
m?4hEwQxf
public static String toString(int algorithm){ #rF`Hk:
return name[algorithm-1]; MUsF
} +lfO4^V
FNuE-_
public static void sort(int[] data, int algorithm) { /g.c(-#]
impl[algorithm-1].sort(data); PVH Or^
} *l4[`7|
W7'<Jom|?
public static interface Sort { )XavhS~Ff
public void sort(int[] data); 9Bw#VQ
} _Y;tD
|&{S ~^$
public static void swap(int[] data, int i, int j) { wggB^ }~
int temp = data; i!}6FBZ
data = data[j]; AEaN7[PQx|
data[j] = temp; 2C}Yvfm4
} f,E7eL@
} =]-z?O6^`