[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; [OV"}<V
} mPN@{.(j
int i1=l; Agg<tM{yB
int i2=mid+1; H*&f:mfq
for(int cur=l;cur<=r;cur++){ )3Iz (Ql
if(i1==mid+1) K>r,(zgVc
data[cur]=temp[i2++]; )=Z>#iH1
else if(i2>r) ]J}
data[cur]=temp[i1++]; 3kIN~/<R+7
else if(temp[i1] data[cur]=temp[i1++]; +N9X/QFKV
else ?{|q5n
data[cur]=temp[i2++]; 6?mibvK
} +[AQUc
} % X+:o]T
RLynEV;]
} ~u!|qM
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改进后的归并排序: _8riUt
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package org.rut.util.algorithm.support; V2?=4mb
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import org.rut.util.algorithm.SortUtil; o]` *M|
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/** 4(~L#}:r!
* @author treeroot .TR9975
* @since 2006-2-2 {M$1N5Eh
* @version 1.0 !M]uL&:
*/ z(exA
public class ImprovedMergeSort implements SortUtil.Sort { nntuLuW
pV +|o.<C
private static final int THRESHOLD = 10; +0%w ;'9z
HU}7zK2
/* _ Yx]_Y9I
* (non-Javadoc) YTX,cj#D^&
* i]y<|W)Q3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :O?MSS;~
*/ FLCexlv^
public void sort(int[] data) { \H~T>j{N
int[] temp=new int[data.length]; axRV:w;E<
mergeSort(data,temp,0,data.length-1); FQ2
} a %'the
u\x}8pn
private void mergeSort(int[] data, int[] temp, int l, int r) { &)Tdc
int i, j, k; OwUhdiG
int mid = (l + r) / 2; GT!M[*[
if (l == r) wj<6kG
return; Eh;'S"{/?j
if ((mid - l) >= THRESHOLD) # E^1|:
mergeSort(data, temp, l, mid); fue(UMF~
else SSg8}m5)Q
insertSort(data, l, mid - l + 1); dA`IEQJL
if ((r - mid) > THRESHOLD) #$+*;
mergeSort(data, temp, mid + 1, r); } FlT%>Gw
else p8H'{f\G
insertSort(data, mid + 1, r - mid); -.@r#d/
@* jz o
for (i = l; i <= mid; i++) { e&F8m%t
temp = data; vnt%XU,,Y
} 5 +YH.4R
for (j = 1; j <= r - mid; j++) { cLJ$M`e
temp[r - j + 1] = data[j + mid]; vq0Tk bzs
} gA+qC7=p$
int a = temp[l]; +z\^t_"f
int b = temp[r]; 9y8&9<#
for (i = l, j = r, k = l; k <= r; k++) { S6M}WR^,
if (a < b) { +nhLIO{{L
data[k] = temp[i++]; Mj?`j_X
a = temp; 4qbBc1,7y
} else { E *6Cw l
data[k] = temp[j--]; \*y-g@-{W$
b = temp[j]; m6K}|j
} 4qh?,^Dq
} \0I_<
} #n#}s
VUGmi]qd
/** I-)+bV G
* @param data 4Zddw0|2
* @param l m@F`!qY~Y\
* @param i Q&ptc>{bH6
*/ T_ <@..C
private void insertSort(int[] data, int start, int len) { d-ZJL6-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =sU<S,a*
} D~iz+{Q4
} -1_)LO&H
} $q{!5-e
} _QE qk@ql
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堆排序： ")5":V~fN
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package org.rut.util.algorithm.support; J26VnK
{n.PF8A5X
import org.rut.util.algorithm.SortUtil; El".I?E*
7\[@m3s
/** M}-Rzc
* @author treeroot |?xN\O^#}
* @since 2006-2-2 t%FwXaO#
* @version 1.0 G]tn i
*/ ]t,BMu=%
public class HeapSort implements SortUtil.Sort{ ^Za-`8#`L
o#gWbAG;]b
/* (non-Javadoc) |\t-g"~sN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (vnAbR#e
*/ {.|CdqwY
public void sort(int[] data) { XS{Qnx_#
MaxHeap h=new MaxHeap(); Beo@K|3GN
h.init(data); Tc:)- z[o
for(int i=0;i h.remove(); P%VSAh\|n
System.arraycopy(h.queue,1,data,0,data.length); ({)+3]x
} mb3"U"ohs
4Uo&d#o)C-
private static class MaxHeap{ W:nef<WH
On.{!:"I/
void init(int[] data){ rJTa
this.queue=new int[data.length+1]; o4,6.1}
for(int i=0;i queue[++size]=data; SmH=e@y~Lx
fixUp(size); /NFj(+&g+
} Fb>?1i`RN
} FUb\e-Q=
+Q)XH>jh
private int size=0; u@M,qo`
]Sz:|%JP1
private int[] queue; MYvY]Jx3
'ya{9EdlT
public int get() { yYYSeH
return queue[1]; ^*Q ?]N
} (gU!=F?#m
)m)-o4c
public void remove() { xml7Uarc
SortUtil.swap(queue,1,size--); |F[+k e
fixDown(1); KqJs?Won
} 50wulGJud
file://fixdown 9>/4W.
private void fixDown(int k) { iC~^)-~H=w
int j; 9T9!kb
while ((j = k << 1) <= size) { _Y4` xv0/
if (j < size %26amp;%26amp; queue[j] j++; Y=I'czg
if (queue[k]>queue[j]) file://不用交换 =v&hWjP
break; >Q;l(fdj
SortUtil.swap(queue,j,k); n'LrQU
k = j; [yQt^!;
} _8J.fT$${
} sb*G!8j
private void fixUp(int k) { !;{7-~
while (k > 1) { CwzZ8.o$i
int j = k >> 1; LL|r A:
if (queue[j]>queue[k]) ie95rZp
break; o#Dk& cH
SortUtil.swap(queue,j,k); ED( Sg
k = j; 4l'fCZhA}
} ZvX*t)VjTz
} *OsQ}onv
_6hQ %hv8
} Gj?t_Zln
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} |aS.a&vwR
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SortUtil： 4e7-0}0
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package org.rut.util.algorithm; #gN&lY:CFn
k]|~>9eY]
import org.rut.util.algorithm.support.BubbleSort; +@f26O7$*
import org.rut.util.algorithm.support.HeapSort; lfgq=8d
import org.rut.util.algorithm.support.ImprovedMergeSort; /Cr%{'Pzk
import org.rut.util.algorithm.support.ImprovedQuickSort; xLajso1g69
import org.rut.util.algorithm.support.InsertSort; my1@41 H
import org.rut.util.algorithm.support.MergeSort; & J'idYD
import org.rut.util.algorithm.support.QuickSort; Of#u
import org.rut.util.algorithm.support.SelectionSort; ~,Ix0h+H+M
import org.rut.util.algorithm.support.ShellSort; 4F:\-O
K@]4g49A/j
/** T&bYa`f]
* @author treeroot Dml;#'IF3
* @since 2006-2-2 /36:ms A
* @version 1.0 Dx?,=~W9
*/ LonxT&"!D
public class SortUtil { Bkc4TO
public final static int INSERT = 1; i&fuSk EP
public final static int BUBBLE = 2; &6!)jIWJ
public final static int SELECTION = 3; 8dA~\a
public final static int SHELL = 4; #zs~," dRv
public final static int QUICK = 5; T?0eVvM
public final static int IMPROVED_QUICK = 6; (5YM?QAd
public final static int MERGE = 7; vA{-{Q
public final static int IMPROVED_MERGE = 8; F/{!tx
public final static int HEAP = 9; T'9'G M
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public static void sort(int[] data) { RtS+<^2a;
sort(data, IMPROVED_QUICK); ? OM!+O
} 1CZgb
private static String[] name={ <'oQ \eB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PC8Q"O
}; (ZZ8L-s
q3!bky\
private static Sort[] impl=new Sort[]{ lUZ+YD4
new InsertSort(), .`eN8Dl1
new BubbleSort(), h[Y1?ln&h
new SelectionSort(), T!#GW/?
new ShellSort(), .L~AL|2_
new QuickSort(), (w3YvG.
new ImprovedQuickSort(), 2/^3WY1U
new MergeSort(), ES7s1O$#
new ImprovedMergeSort(), ouQ T
new HeapSort() M6jy\<a
}; ~36!?&eA8
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public static String toString(int algorithm){ q|(HsLs
return name[algorithm-1]; tyFzSrfc
} ^nz.j
n-;`Cy`k
public static void sort(int[] data, int algorithm) { k y7Gwc
impl[algorithm-1].sort(data); wi=v}R_
} vk^xT
n7[V&`e_
public static interface Sort { 1Pu~X \sO
public void sort(int[] data); lL3U8}vn
} *g2x%aZWbG
Jnov<+
public static void swap(int[] data, int i, int j) { d$!RZHo10V
int temp = data; 73;GW4,
data = data[j]; _Fl9>C"u
data[j] = temp; 7?_CcRe
} L="}ErmK
} $U~]=.n