[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; $ ohwBv3S
} ^dZ,Itho
int i1=l; g|"z'_
int i2=mid+1; >Eik>dQ a
for(int cur=l;cur<=r;cur++){ HjGT{o
if(i1==mid+1) A7VF >{L./
data[cur]=temp[i2++]; T>g1! -^
else if(i2>r) %T}{rU~X
data[cur]=temp[i1++]; O5_[T43
else if(temp[i1] data[cur]=temp[i1++]; eP&K]#
else ;y=w :r\A
data[cur]=temp[i2++]; Oq*a4_R'YV
} 5Lum$C c}
} *%B%BJnX
{ zlq6z
} ^nkwT~Bya
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改进后的归并排序: 6jCg7Su]
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package org.rut.util.algorithm.support; Jfo|/JQ
)lB-D;3[_
import org.rut.util.algorithm.SortUtil; |g8 ]WFc
g\rujxHlH
/** PA`b~Ct
* @author treeroot jd]MC*%
* @since 2006-2-2 "N4c>2Q
* @version 1.0 \M:,Vg
*/ rvw1'y
public class ImprovedMergeSort implements SortUtil.Sort { Gg5vf]VFo
&Radpb2p6
private static final int THRESHOLD = 10; FE M_7M
QHP^1W`
/* gJs~kQU
* (non-Javadoc) `'0opoQRe
* Y)BKRS~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5kC#uk
*/ t,k9:p
public void sort(int[] data) { D@DK9?#
int[] temp=new int[data.length]; dH?pQ
mergeSort(data,temp,0,data.length-1); !RiPr(m@y
} :".!6~:2
tHJ1MDw'
private void mergeSort(int[] data, int[] temp, int l, int r) { ]Y;$~qQ
int i, j, k; q69a-5q
int mid = (l + r) / 2; eZ}FKg%2[
if (l == r) LwY_6[Ef
return; m6lNZb]
if ((mid - l) >= THRESHOLD) JC>}(yQA
mergeSort(data, temp, l, mid); 1;? L:A
else 'v6Rd)E\z
insertSort(data, l, mid - l + 1); s15f <sp
if ((r - mid) > THRESHOLD) H#w?$?nIWu
mergeSort(data, temp, mid + 1, r); -[^wYr=
else (e F5?I
insertSort(data, mid + 1, r - mid); ^,U&v;
;pAkdX&b
for (i = l; i <= mid; i++) { `f6Qd2\
temp = data; tG%R_$*
} pKr3(5~
for (j = 1; j <= r - mid; j++) { JXPn <
temp[r - j + 1] = data[j + mid]; uA}asm
} (&njZdcb*
int a = temp[l]; ;GH(A=}/Y
int b = temp[r]; fF-V=Zf5
for (i = l, j = r, k = l; k <= r; k++) { X 8[T*L.
if (a < b) { u6(7#n02
data[k] = temp[i++]; Z>CFH9
a = temp; oL VtP
} else { azE>uEsE
data[k] = temp[j--]; &<tji8Dj
b = temp[j]; !u7WCw.Dm
} _`D760q}
} ef!I |.FW
} NA0hQGN}
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/** K.X% Q,XD
* @param data (\WePOy&
* @param l {/n$Y|TIQt
* @param i v'_tna6`O
*/ I"DV}jg6|
private void insertSort(int[] data, int start, int len) { K"g[%O<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tH W"eag
} YI\^hP#
} -p%=36n
} &TK%igL
} 1ViDS
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堆排序： m$@CwQj
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package org.rut.util.algorithm.support; OW #pBeX99
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import org.rut.util.algorithm.SortUtil; vW]BOzK
ipU"|{NK
/** }bB_[+YV`{
* @author treeroot jkD5Z`D
* @since 2006-2-2 g|nPr)<
* @version 1.0 $1?YVA7
*/ 751\K`L
public class HeapSort implements SortUtil.Sort{ N0.-#Qa
` $zi?A:j
/* (non-Javadoc) sZB$+~.:}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yTZbJx?m
*/ {ifYr(|p`
public void sort(int[] data) { !).D
MaxHeap h=new MaxHeap(); <Ft.{aNq$c
h.init(data); ^8fO3<Jg
for(int i=0;i h.remove(); -2Ub'*qK
System.arraycopy(h.queue,1,data,0,data.length); ueqR@i
} fx_7B (
fY-{,+ `'
private static class MaxHeap{ <X;y 4lPZ
u}ab[$Q5
void init(int[] data){ j~L{=ojz%
this.queue=new int[data.length+1]; H"n"Q:Yp
for(int i=0;i queue[++size]=data; Xw![}L>
fixUp(size); /yH:ur
} .e]!i(5I
} fQe-v_K
2I#fwsb
private int size=0; _A%z^&k(i
m >'o&Hj
private int[] queue; %Rg84tz
*;4r|#LG
public int get() { JEBx|U$'Y
return queue[1]; .@xwl}o$OL
} kOkgsQQ
^oPf>\),C
public void remove() { Mi:$<fEX
SortUtil.swap(queue,1,size--); Ro?4tGn
fixDown(1); O/0m|~`iY
} a0y;c@pkO
file://fixdown `MEH/
private void fixDown(int k) { 1p`XK";g
int j; N}zQ)]xz+r
while ((j = k << 1) <= size) { M~P}80I
if (j < size %26amp;%26amp; queue[j] j++; &OWiA;e?f
if (queue[k]>queue[j]) file://不用交换 1*(^<x+n
break; $t[`}I }
SortUtil.swap(queue,j,k); He&dVP
k = j; e7 5*84
} vek9. 4! ]
} u["Pg
private void fixUp(int k) { fWF\V[
while (k > 1) { QH#|R92:
int j = k >> 1; C:$lH
if (queue[j]>queue[k]) l}Jf;C*j1z
break; 8?P@<Do%
SortUtil.swap(queue,j,k); iK'bV<V&7
k = j; k`kmmb>
} -F@Rpfrj_#
} s+o/:rrxY
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} R\1#)3e0
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} wD}[XE?S
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SortUtil： qdNYY&6>?u
LW0't} z
package org.rut.util.algorithm; ;lnh;0B
9`QWqu[
import org.rut.util.algorithm.support.BubbleSort; KS3 /
import org.rut.util.algorithm.support.HeapSort; ep>S$a*|
import org.rut.util.algorithm.support.ImprovedMergeSort; 2o?!m2W
import org.rut.util.algorithm.support.ImprovedQuickSort; cYmMO[4YG'
import org.rut.util.algorithm.support.InsertSort; r9z/hm}E
import org.rut.util.algorithm.support.MergeSort; lLyMm8E%pZ
import org.rut.util.algorithm.support.QuickSort; ;' YM@n
import org.rut.util.algorithm.support.SelectionSort; _`*x}
import org.rut.util.algorithm.support.ShellSort; \oLRNr[F
pZ%/;sxYa
/** ,/ly|Dv
* @author treeroot q2Ax-#
* @since 2006-2-2 F=$2Gz 'RT
* @version 1.0 ;v*$6DIC5
*/ tWdj"n%
public class SortUtil { KP -g<Zc
public final static int INSERT = 1; c7L#f=Ot?
public final static int BUBBLE = 2; <s)+V6\E
public final static int SELECTION = 3; v/}M_E
public final static int SHELL = 4; B&+V%~/
public final static int QUICK = 5; w*uHB;?
public final static int IMPROVED_QUICK = 6; Vq -!1.v3
public final static int MERGE = 7; B/c_pRl;
public final static int IMPROVED_MERGE = 8; |wQ|h$|
public final static int HEAP = 9; 0^?(;AK
VfAIx]Fa
public static void sort(int[] data) { ?SkYFa`u*
sort(data, IMPROVED_QUICK); \[%[`m
} .3 m^yo c/
private static String[] name={ c<r`E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xT#j-T
}; `LEk/b1(P
9<W0'6%{/
private static Sort[] impl=new Sort[]{ (|Y[5O)
new InsertSort(), qXn%c"
new BubbleSort(), ]}<wS]1
new SelectionSort(), V+W,#5
new ShellSort(), JLp.bxx
new QuickSort(), .ss/E
new ImprovedQuickSort(), L*6Tz'Qp
new MergeSort(), w(]Q`
new ImprovedMergeSort(), h?p&9[e`
new HeapSort() A?06fo,
}; b6 &`]O;%
;Bd0 =C
public static String toString(int algorithm){ LZqx6~]O
return name[algorithm-1]; XwOj`N{!H
} 5Y"JRWC
JVD#wwic
public static void sort(int[] data, int algorithm) { Y4YA1F
impl[algorithm-1].sort(data); ]6v6&YV
} O{y2tz3
\h~;n)FI
public static interface Sort { -5l74f!i
public void sort(int[] data); qY]IX9'kV
} B5hk]=Ud
lY yt8H
public static void swap(int[] data, int i, int j) { 4E}]>
int temp = data; "<SK=W
data = data[j]; +O`0Mc$%'
data[j] = temp; )zkk%mE/IM
} J GnL[9P_
} _fz-fG 1