[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; aJI>FTdK
} E\w+kAAf
int i1=l; fzl=d_
int i2=mid+1; O8gfiQqF&
for(int cur=l;cur<=r;cur++){ CP +4k.)*O
if(i1==mid+1) Mz93
data[cur]=temp[i2++]; _O$tuC%
else if(i2>r) %Hh3u$Y,
data[cur]=temp[i1++]; o5>/}wIf
else if(temp[i1] data[cur]=temp[i1++]; /n(9&'H<
else U%L -NMe
data[cur]=temp[i2++]; vsH3{:&;"P
} ?J<T
} :H{Bb{B%
i9KTX%s5^
} {-Yee[d<?
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改进后的归并排序: [qiOd!
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package org.rut.util.algorithm.support; &uPDZ#C-
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import org.rut.util.algorithm.SortUtil; 6zuze0ud
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/** (e(Rr4
* @author treeroot )R~a;?T_c0
* @since 2006-2-2 1f<RyAE?5
* @version 1.0 cu<y8 :U<
*/ O5O.><RP
public class ImprovedMergeSort implements SortUtil.Sort { bCzdszvg3
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private static final int THRESHOLD = 10; *y{+W
V+46R ]
/* gd K*"U
* (non-Javadoc) F,zG;_
* p(.N(c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^eobp.U
*/ |Hfl&3
public void sort(int[] data) { =C#*!N73
int[] temp=new int[data.length]; `T=1<Twc
mergeSort(data,temp,0,data.length-1); $}db /hY*
} 9T$u+GX'
@/LiR>,
private void mergeSort(int[] data, int[] temp, int l, int r) { B_cgWJ*4
int i, j, k; :Z[(A"dA
int mid = (l + r) / 2; hl**zF
if (l == r) 5\&]J7(
return; Uh}+"h5
if ((mid - l) >= THRESHOLD) nW11wtiO.
mergeSort(data, temp, l, mid); g**5z'7
else %uua_&#)
insertSort(data, l, mid - l + 1); i$["aP~G
if ((r - mid) > THRESHOLD) D!S8oKW
mergeSort(data, temp, mid + 1, r); ^@K WYAAW5
else 8]HY. $E
insertSort(data, mid + 1, r - mid); %{U"EZ]D!
5*Btb#:
for (i = l; i <= mid; i++) { ?T <rt
temp = data; ~~@y_e[N#l
} =D5wqCT(Q
for (j = 1; j <= r - mid; j++) { |WBZN1W)
temp[r - j + 1] = data[j + mid]; ZB$NVY
} SetX#e?q~
int a = temp[l]; p.5e: i^LJ
int b = temp[r]; nn'Af,ko/
for (i = l, j = r, k = l; k <= r; k++) { ~{$L9;x
if (a < b) { .+HcAx{/2
data[k] = temp[i++]; a>w~FUm*
a = temp; I )5<DZB9
} else { V,m3-=q
data[k] = temp[j--]; xvB8YW"
b = temp[j]; q=+wI"[
} .'&V#D0
} "Vx6 #u@}
} 6`Lcs
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/** PV(4$I}
* @param data z-I|h~ii
* @param l hVkO%]?
* @param i 8RU.}PD
*/ =gs~\q
private void insertSort(int[] data, int start, int len) { `|,Bm|~:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {pC\\}
} &}E:jt}
} 2qjyFTT
} DLXL!-)z
} 6<PW./rk:
f7 wmw2
堆排序： o[oqPN3$Y
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package org.rut.util.algorithm.support; h9jc,Xu5X
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import org.rut.util.algorithm.SortUtil; Fv A8T2-v
_N@(Y:
/** .lr5!Stb
* @author treeroot #"<?_fao~
* @since 2006-2-2 J 3B`Krh
* @version 1.0 Hnd+l)ng
*/ 7gr^z)${J
public class HeapSort implements SortUtil.Sort{ GL`tOD:P"
0#^Bf[Dn
/* (non-Javadoc) ,Y-S(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [4: Yi{>
*/ #QS?s8IrW
public void sort(int[] data) { C99&L3bz^(
MaxHeap h=new MaxHeap(); DN<M?u]
h.init(data); ?<6@^X"
for(int i=0;i h.remove(); c$A@T~$
System.arraycopy(h.queue,1,data,0,data.length); -"tY{}z
} kT2Wm/L
qlvwK&W<QM
private static class MaxHeap{ TL@mM
^e%k~B^
void init(int[] data){ x 'mF&^
this.queue=new int[data.length+1]; gH'3 dS!{
for(int i=0;i queue[++size]=data; Sc{Tq\t;%
fixUp(size); (0}j]p'w
} XL~>rw<
} |T y=7d,
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private int size=0; B!uxs
He<;4?:
private int[] queue; +q-c8z
]!faA\1
public int get() { LQ>$>A(
return queue[1]; 6n,xH!7
} Yv=g^tw
T%~SM5
public void remove() { `2e_ L
SortUtil.swap(queue,1,size--); 32^#RlSu8
fixDown(1); 9(OAKUQ
} K_&_z
file://fixdown vpV$$=Qwp
private void fixDown(int k) { R[Nbtbv9Q
int j; 5*1#jiq
while ((j = k << 1) <= size) { 61>f(?s
if (j < size %26amp;%26amp; queue[j] j++; N iISJWk6'
if (queue[k]>queue[j]) file://不用交换 `;/XK,m-
break; S(tEwXy
SortUtil.swap(queue,j,k); R"{l[9j4>
k = j; `I#`:hj
} lRH0)5`
} Bq{]Eh0%
private void fixUp(int k) { [4\aYB9N
while (k > 1) { u>}zm_
int j = k >> 1; t)'dF*L
if (queue[j]>queue[k]) cd&B?\I
break; Fs)
SortUtil.swap(queue,j,k); qRl/Sl#F
k = j; 4m\([EO
} DJ|BM+
} *m&%vj.Kc
> Y]_K
} \HD-vINV;
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} gmDR{loX
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SortUtil： K"^cq~
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package org.rut.util.algorithm; ^vW$XRnt
XmlIj8%9[&
import org.rut.util.algorithm.support.BubbleSort; T]uKH29.%
import org.rut.util.algorithm.support.HeapSort; `-u7 I
import org.rut.util.algorithm.support.ImprovedMergeSort; :*cHA
import org.rut.util.algorithm.support.ImprovedQuickSort; ThiN9! Y
import org.rut.util.algorithm.support.InsertSort; xU:4Y0y8
import org.rut.util.algorithm.support.MergeSort; `0z/BCNB
import org.rut.util.algorithm.support.QuickSort; B.RRdK+:
import org.rut.util.algorithm.support.SelectionSort; y;r"+bS8
import org.rut.util.algorithm.support.ShellSort; #<]Iz'\`
Wp`C:H
/** x G^f
* @author treeroot zQ<88E&&Xs
* @since 2006-2-2 2NYi-@mr
* @version 1.0 "qE {a>d
*/ ,(;5%+#n
public class SortUtil { %ZiK[e3G
public final static int INSERT = 1; Q.1XP
public final static int BUBBLE = 2; E|{m"RUOy
public final static int SELECTION = 3; 1w17L]4
public final static int SHELL = 4; ;:?*t{r4#
public final static int QUICK = 5; OW#_ty_ul
public final static int IMPROVED_QUICK = 6; b|6!EGh
public final static int MERGE = 7; SBz/VQ
public final static int IMPROVED_MERGE = 8; >>j+LRf*
public final static int HEAP = 9; i pwW%"6
qw2)v*Fn
public static void sort(int[] data) { XECikld>
sort(data, IMPROVED_QUICK); s6/cL|Ex
} 2m_H*1HJ
private static String[] name={ 0mVuD\#=!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mtIMW9
}; 0Nt%YP
.*:h9AE7vo
private static Sort[] impl=new Sort[]{ ng 9NE8F
new InsertSort(), PqI![KxZW
new BubbleSort(), %z2oDAjX
new SelectionSort(), RQ|?Ce",
new ShellSort(), nNu[c[V
new QuickSort(), Pj._/$R[/
new ImprovedQuickSort(), W8VO)3nmD
new MergeSort(), i(P>Y2s
new ImprovedMergeSort(), M/l95fp
new HeapSort() hg4J2m
}; V_lGj
cCk1'D|X[e
public static String toString(int algorithm){ hR0]8l|
return name[algorithm-1]; r.?+gW!C
} O"8P#Ed
wR(ttwxK3
public static void sort(int[] data, int algorithm) { A(NEWO
impl[algorithm-1].sort(data); wa2~C [
} Hva{A #
a}w&dE$!-
public static interface Sort { pJn>oGeJ&
public void sort(int[] data); Z@u ;Z[@
} ]o `4Z"
?`"<DH~:0B
public static void swap(int[] data, int i, int j) { Bu':2"7
int temp = data; leR"j
data = data[j]; PB@-U.Z
data[j] = temp; $6Z[|9W^A
} ah>Dqb*
} 9T/<x-FD