[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; zNT~-
} M7"I]$|\
int i1=l; V>}@--$c-r
int i2=mid+1; ]PVPt,c
for(int cur=l;cur<=r;cur++){ D`]Lm24_]
if(i1==mid+1) %OWLM
data[cur]=temp[i2++]; b#h?O}
else if(i2>r) Uq/#\7/rL
data[cur]=temp[i1++]; Ui6f>0?
else if(temp[i1] data[cur]=temp[i1++]; fu|N{$h%X
else @MIBW)P<
data[cur]=temp[i2++]; jRN*W2]V
} S -j<O&h~C
} j&(2ze:=*$
:5X1Tr=A
} Vx_lI #3
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改进后的归并排序: c-z2[a8
-L>\58`
package org.rut.util.algorithm.support; WN9<
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import org.rut.util.algorithm.SortUtil; UeB8|z
b#0y-bR
/** j`I[M6Qxh
* @author treeroot $3BCA)5:
* @since 2006-2-2 R }M'D15
* @version 1.0 (A2x
*/ Y(IT#x?p
public class ImprovedMergeSort implements SortUtil.Sort { )e.Y"5My
6zK8-V?9F
private static final int THRESHOLD = 10; *OU>s;"$
zAEq)9Y"l'
/* `<ITLT
* (non-Javadoc) J<x?bIetj
* U,"lOG'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "?_adot5v
*/ }K,:aN,44\
public void sort(int[] data) { 'Im7^!-d
int[] temp=new int[data.length]; PbOLN$hP
mergeSort(data,temp,0,data.length-1); Iu6KW:x
} 4?XX_=+F|
Ju$=Tn
private void mergeSort(int[] data, int[] temp, int l, int r) { `Z]Tp1U
int i, j, k; [^r0red
int mid = (l + r) / 2; P9Hv){z
if (l == r) ^_b+o
return; bF %#KSVw
if ((mid - l) >= THRESHOLD) -jsNAQ
mergeSort(data, temp, l, mid); a,o)i8G9R<
else vTN/ho,H
insertSort(data, l, mid - l + 1); $|.x!sA
if ((r - mid) > THRESHOLD) 7"F w8;k
mergeSort(data, temp, mid + 1, r); .{D[!Dp#h
else AfKJaDKf
insertSort(data, mid + 1, r - mid); ~[XDK`B
L%`~`3%n-
for (i = l; i <= mid; i++) { LXj2gsURu%
temp = data; .58>KBj(
} FRI<A8
for (j = 1; j <= r - mid; j++) { $Ch!]lJA
temp[r - j + 1] = data[j + mid]; \UFno$;mA
} h.c<A{[I6c
int a = temp[l]; r(pp =
int b = temp[r]; KL]K< A
for (i = l, j = r, k = l; k <= r; k++) { ) Ph.
if (a < b) { k$kq|
data[k] = temp[i++]; NGB%fJ
a = temp; %Qc#v$;+J
} else { .>>@q!!s!
data[k] = temp[j--]; `we2zT
b = temp[j]; "m +Eu|{
} /b,+YyWi%
} XNwY\y
} vC~];!^
8r/]Q
/** xdp!'1n."g
* @param data |RwpIe8~
* @param l -xq)brG
* @param i 5%kt;ODS
*/ zsA6(?)u
private void insertSort(int[] data, int start, int len) { ~Kda#=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `),7*gn*)
} N;tUrdgQ
} h4H~;Wl0
} =-jkp
} (V@g?|LZ
&'V_80vA
堆排序： x|*v(,7b]!
x{<WJ|'B
package org.rut.util.algorithm.support; $7gzu4f
I z~#G6]M
import org.rut.util.algorithm.SortUtil; a`(6hL3IT
/_v5B>
/** !zLd,`
* @author treeroot s$6zA j!
* @since 2006-2-2 v=nq P{
* @version 1.0 ]]@jvU_?kS
*/ Fh& `v0
public class HeapSort implements SortUtil.Sort{ `g6XVa*%#
w[\*\'Vm0
/* (non-Javadoc) wl^bvHG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4XK*sR0-`
*/ Cl[ '6Lk
public void sort(int[] data) { o!L1Qrh
MaxHeap h=new MaxHeap(); iZ#dS}VlJ
h.init(data); Zoj.F
for(int i=0;i h.remove(); :gDIGBK,
System.arraycopy(h.queue,1,data,0,data.length); 0trVmWQ8
} w=d#y )1
vn3<LQ]
private static class MaxHeap{ '#xxjhF^
Rct|"k_"Ys
void init(int[] data){ r~F T,
this.queue=new int[data.length+1]; Qi2yaEB
for(int i=0;i queue[++size]=data; Xtbuy/8"1
fixUp(size); 3sc5meSu'
} G40,KCa
} NUiZ!&
n )YNt
private int size=0; eS fT+UL
C$oY,A,
private int[] queue; l_iucN
7^'TU=ss_
public int get() { 9>u2; 'Ls
return queue[1]; &#v^y3r
} SSycQ4[{o
} IFZ$Y
public void remove() { xy46].x-
SortUtil.swap(queue,1,size--); wx -NUTRim
fixDown(1); z %{>d#rw
} Mcc774'*9
file://fixdown jVL<7@_*
private void fixDown(int k) { ^"v~hjM#
int j; (f5!36mz
while ((j = k << 1) <= size) { J|_&3@r
if (j < size %26amp;%26amp; queue[j] j++; ^M6v;8EU
if (queue[k]>queue[j]) file://不用交换 /XS6X
break; #rMMOu9r2
SortUtil.swap(queue,j,k); :Gqyj_|<
k = j; 9=@j]g|
} [Ua4{3#
} ]Gow
private void fixUp(int k) { ['R2$z
while (k > 1) { PKT0Drv}c7
int j = k >> 1; ?H eC+=/Z
if (queue[j]>queue[k]) SPOg'
break; G%S=K2v
SortUtil.swap(queue,j,k); +e<P7}ZQ
k = j; Fzh%#z0
} 9vCn^G%B
} {=IK(H
VE4!=4
} ,=B "%=S
'cy35M
} -'BJhi\Y]~
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SortUtil： irqlU
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package org.rut.util.algorithm; 'e02rqip{
HKv:)h{?
import org.rut.util.algorithm.support.BubbleSort; #6fp"
import org.rut.util.algorithm.support.HeapSort; H&E c*MT
import org.rut.util.algorithm.support.ImprovedMergeSort; l-_voOP
import org.rut.util.algorithm.support.ImprovedQuickSort; | ctGxS9
import org.rut.util.algorithm.support.InsertSort; "p.MJxH
import org.rut.util.algorithm.support.MergeSort; S0/@y'q3en
import org.rut.util.algorithm.support.QuickSort; ]kbmbO?M
import org.rut.util.algorithm.support.SelectionSort; rmUTl
import org.rut.util.algorithm.support.ShellSort; &|iFhf[o
pA='(G
/** vmAMlgZ8{<
* @author treeroot `j0T[Pi
* @since 2006-2-2 1lfkb1BM
* @version 1.0 bM_Y(TgJ
*/ f%ZqK_CW
public class SortUtil { [0yKd?e
public final static int INSERT = 1; ?(Dkh${@
public final static int BUBBLE = 2; 9H2^4D8
public final static int SELECTION = 3; YoGnk^$
public final static int SHELL = 4; =#^%; 66z
public final static int QUICK = 5; iOPv %[
public final static int IMPROVED_QUICK = 6; '?E^\\"*
public final static int MERGE = 7; ldrKk'S,B
public final static int IMPROVED_MERGE = 8; cbsy&U
public final static int HEAP = 9; zBay 3a
;WJ}zjo >
public static void sort(int[] data) { Wd~aSz9
sort(data, IMPROVED_QUICK); N/DcaHFYo
} yJWgz`/L
private static String[] name={ 15r,_Gp8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hdW",Bf'
}; }+#-\a2
)I 4d_]&
private static Sort[] impl=new Sort[]{ N6cf`xye
new InsertSort(), &BqRyUM$F
new BubbleSort(), ,IA0n79
new SelectionSort(), ~;aSX1
new ShellSort(), &fdH HN
new QuickSort(), m;WUp{'
new ImprovedQuickSort(), "@Bc eD
new MergeSort(), BZQ98"Fz*
new ImprovedMergeSort(), ,G e7 9(
new HeapSort() cn v4!c0
}; 2uZ <q?=
:1q+[T/ @
public static String toString(int algorithm){ A1{P"p!
return name[algorithm-1]; -_ .f&l8
} bRJYw6oA<
GbwcbfH
public static void sort(int[] data, int algorithm) { ^6#FqK+{u
impl[algorithm-1].sort(data); a)MjX<y
} )W:`Q&/G
YM 0f_G=
public static interface Sort { ?Vb=W)Es
public void sort(int[] data); 1}tZ,w>
} yAU[A
|rH;}t|un
public static void swap(int[] data, int i, int j) { :t?9$ dL
int temp = data; -. L)-%wIV
data = data[j]; chQt8Ar3
data[j] = temp; S6h=} V)
} e-,U@_B
} .S`Ue,H