[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; b=Q%Jxz?
} YccD^w[`B
int i1=l; T:udw
int i2=mid+1; N8]d0
for(int cur=l;cur<=r;cur++){ SjU0Xb)[
if(i1==mid+1) u O~MT7~[X
data[cur]=temp[i2++]; Uw>g^[V;
else if(i2>r) E`3[62C
data[cur]=temp[i1++]; Z9PG7h
else if(temp[i1] data[cur]=temp[i1++]; ]<E\J+5K
else k5GJrK+
data[cur]=temp[i2++]; eN I6V/\`
} uacVF[9|W
} , @6_sl
eZRu{`AF*
} J,wpY$93
()@+QE$
改进后的归并排序: zDA;FKZPp
,W;2A0A?X
package org.rut.util.algorithm.support; ^G(+sb[t
#c2JWDH1F
import org.rut.util.algorithm.SortUtil; uTUkRqtD!
pd}af iF
/** 0GiL(e|
* @author treeroot +t;j5\HS
* @since 2006-2-2 ?-PW$p
* @version 1.0 |Ns[{/
*/ Qc"UTvq
public class ImprovedMergeSort implements SortUtil.Sort { I78huYAYA
0SWec7G
private static final int THRESHOLD = 10; nSV OS6
PF/eQZ*4
/* 25`6V>\
* (non-Javadoc) (K->5rSU
* ^<'=]?xr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C&KH.h/N
*/ HA(G q
public void sort(int[] data) { ^Zw1X6C5~
int[] temp=new int[data.length]; Y[ toN9,
mergeSort(data,temp,0,data.length-1); UPJ3YpK
} 3+$~l5LY
:+\B|*T2.L
private void mergeSort(int[] data, int[] temp, int l, int r) { VSa#X |z
int i, j, k; b\9}zmG[u
int mid = (l + r) / 2; q%GlS=o"
if (l == r) o%=OBTh_
return; 4o*wLCo7^
if ((mid - l) >= THRESHOLD) !BW6l)=L
mergeSort(data, temp, l, mid); FQCz_z
else '0>w_ge4
insertSort(data, l, mid - l + 1); 2q.J1:lW
if ((r - mid) > THRESHOLD) &8uq5uKg
mergeSort(data, temp, mid + 1, r); *J] }bX
else '\.fG\xD
insertSort(data, mid + 1, r - mid); c2<JS:!*
D>Dch0{H,:
for (i = l; i <= mid; i++) { 1-60gI1)
temp = data; 8!{F6DG
} $17utJ58
for (j = 1; j <= r - mid; j++) { J(\f(jh/
temp[r - j + 1] = data[j + mid]; elf2!
} F&x9.
int a = temp[l]; %B'*eBj~fw
int b = temp[r]; -5t.1/
for (i = l, j = r, k = l; k <= r; k++) { DkGC+Dw
if (a < b) { !Wz%Hy:ZK
data[k] = temp[i++]; !r*Ogv[
a = temp; \sZ!F&a~
} else { 0(!D1G{ul
data[k] = temp[j--]; ;y"quJ'O
b = temp[j]; A296f(
} VdV18-ea
} >|22%YVX
} UFy"hJchO
t1)Qa(#]
/** D|p`~(
* @param data 2-*zevPiG=
* @param l Jx8?x#}
* @param i ~4fjFo&_\
*/ Y^-faL7*\
private void insertSort(int[] data, int start, int len) { Cj x(Z]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NiQ_0Y}
} Wq1%
} ]ozZW:
} IirXF?&t
} co$I htOv
E/</
堆排序： S~mpXH@
se1\<YHDS
package org.rut.util.algorithm.support; z\fmwI
-W5ml @
import org.rut.util.algorithm.SortUtil; k_;+z
xu _:
/** X)^kJ`
* @author treeroot -kVt_
* @since 2006-2-2 l|c#
* @version 1.0 `}YCUm[SI
*/ *uq;O*s
public class HeapSort implements SortUtil.Sort{ O%.c%)4Xo
pLvvv#Y
/* (non-Javadoc) `|\z#Et
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;LM,<QJ
*/ 7LM?<lp]
public void sort(int[] data) { HH+$rrTT
MaxHeap h=new MaxHeap(); ?,J'3nZ'
h.init(data); CVp`G"W:
for(int i=0;i h.remove(); :eIu<_,}
System.arraycopy(h.queue,1,data,0,data.length); V]V~q ]
} b3z{FP
7r?s)ZV
private static class MaxHeap{ CXr]V"X9
YM*{^BXp
void init(int[] data){ gxS*rzCG
this.queue=new int[data.length+1]; 1I*b7t
for(int i=0;i queue[++size]=data; WxB}Uh
fixUp(size); fP>*EDn@xg
} H +O7+=&
} DRC2U%[
A3VXh^y+
private int size=0; kDAPT_Gid
c5& _'&
private int[] queue; u&HLdSHe
Bn 5]{Df
public int get() { =N5~iMorD-
return queue[1]; lj{Jw.t
} Ps@a@d"83
2cy: l03
public void remove() { s%K9;(RWI
SortUtil.swap(queue,1,size--); }i7Gv K<[:
fixDown(1); y my/`%
} z3V[ Vi
file://fixdown '$@bTW
private void fixDown(int k) { #Ont1>T,G
int j; bnb:4?d]
while ((j = k << 1) <= size) { DdY89R 6
if (j < size %26amp;%26amp; queue[j] j++; /~?'zr
if (queue[k]>queue[j]) file://不用交换 ~|_s2T
break; U8+5{,$\.
SortUtil.swap(queue,j,k); {G:dhi
k = j; lLq:(zMH
} o& g01t
} 'rZYl Qm
private void fixUp(int k) { Cy'0O>v5
while (k > 1) { 3]=j!_yJf
int j = k >> 1; \^$g%a
if (queue[j]>queue[k]) Fc{X$hh<
break; 8.S&J6
SortUtil.swap(queue,j,k); .Du-~N4\
k = j; To_Y 8 G
} vhA4ol
} 0}a="`p#<
>h?!6L- d
} PyOj{WX>W
n&? --9r
} D<-MbK^S
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SortUtil： R!mFMw"
>}& :y{z~
package org.rut.util.algorithm; VI{!ZD]
@2>A\0U
import org.rut.util.algorithm.support.BubbleSort; (%&HufT
import org.rut.util.algorithm.support.HeapSort; YueYa#7z
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Jv$Wx
import org.rut.util.algorithm.support.ImprovedQuickSort; >5rb4
import org.rut.util.algorithm.support.InsertSort; oCw>b]S
import org.rut.util.algorithm.support.MergeSort; F}/tV7m
import org.rut.util.algorithm.support.QuickSort; =Oo=&vA.oc
import org.rut.util.algorithm.support.SelectionSort; 6Qo YX] .
import org.rut.util.algorithm.support.ShellSort; UcZ20inj0
{yo<19kV@
/** I ,j,Hz0
* @author treeroot p$mx
* @since 2006-2-2 sqtMhUQ?>w
* @version 1.0 q%g!TFMg
*/ v}vwk8
public class SortUtil { l70a&[W
public final static int INSERT = 1; avJ%J"j8z
public final static int BUBBLE = 2; 8`QbUQ6
public final static int SELECTION = 3; ,".1![b
public final static int SHELL = 4; qL;OE.?oA
public final static int QUICK = 5; P2U^%_~
public final static int IMPROVED_QUICK = 6; `7v"(
public final static int MERGE = 7; >(>,*zP<9
public final static int IMPROVED_MERGE = 8; xL-]gwq
public final static int HEAP = 9; >S<`ri'5_
:5YL!D/&
public static void sort(int[] data) { FX"j8i/N
sort(data, IMPROVED_QUICK); Pv- i.
} ,;&j*qFi
private static String[] name={ %T~3xQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MBeubS
}; Wu}84W"!.V
'AU:[eyUV
private static Sort[] impl=new Sort[]{ %5?Zjp+9
new InsertSort(), /0.m|Th'm
new BubbleSort(), A_:CGtv:
new SelectionSort(), Mm&#I[:
new ShellSort(), ECZ`I Z.
new QuickSort(), $N;Nvp2
new ImprovedQuickSort(), <$"
new MergeSort(), U]o
new ImprovedMergeSort(), apz)4%A
new HeapSort() 0bl?dOV{
}; S2;u!f
\ 5&-U@
public static String toString(int algorithm){ +4*3aWf`
return name[algorithm-1]; f ye=8 r
} +D3w2C
xF/u('A
public static void sort(int[] data, int algorithm) { JX.3b_O
impl[algorithm-1].sort(data); 8^ujA
} C\3;o]
&U.U<
public static interface Sort { |TQ#[9C0
public void sort(int[] data); 0~/'c0Ho
} 3A`|$So
sz"N,-<Ig
public static void swap(int[] data, int i, int j) { qKSS 2f $
int temp = data; Oq`CKf
data = data[j]; f/?uosS
data[j] = temp; 6Z}8"VJr {
} ,8tk]W[C
} ro%Jg