[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; [,F5GW{x
} |Q'l&Gt6
int i1=l; WaVP+Ap
int i2=mid+1; ?}N@bsl08w
for(int cur=l;cur<=r;cur++){ 4gTDHQP
if(i1==mid+1) s57-<&@J9
data[cur]=temp[i2++]; Ng6(2Wt0e
else if(i2>r) `dYM+ jpa
data[cur]=temp[i1++]; 0$n0fu
else if(temp[i1] data[cur]=temp[i1++]; %EZG2JjO)
else ~ "]6
data[cur]=temp[i2++]; y<G@7?
} 3zO'=gwJ
} 4No!`O-!&
a;a2x .<
} (]|rxmycA
y:0j$%^
改进后的归并排序: K#=)]qIk
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package org.rut.util.algorithm.support; n=vW oU9
C} #:<Jx
import org.rut.util.algorithm.SortUtil; ("t; 2Mw
C^@~
/** /"t*gN=wrF
* @author treeroot vG'JMzAm
* @since 2006-2-2 =H_|007C
* @version 1.0 F<y5zqGy@
*/ ,6Kx1 c
public class ImprovedMergeSort implements SortUtil.Sort { N/A.1W
*pMgjr
private static final int THRESHOLD = 10; +"!,rZ7,A
Bv^{|w
/* K8.=bGyg
* (non-Javadoc) ;as4EqiK
* #Nt?4T<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -WIT0F4o;
*/ S6 F28 d[j
public void sort(int[] data) { C3af>L@}
int[] temp=new int[data.length]; 9-DDly [)4
mergeSort(data,temp,0,data.length-1); nT0FonK>
} .y{qsL^P
goi5I(yn^
private void mergeSort(int[] data, int[] temp, int l, int r) { 3QDz0ct
int i, j, k; {]~b^=qE$
int mid = (l + r) / 2; L$7 NT}L
if (l == r) NZ`( d
return; C,R_`%b%
if ((mid - l) >= THRESHOLD) T?W`g>yM
mergeSort(data, temp, l, mid); pHlw&8(f"
else k,S'i#4q4
insertSort(data, l, mid - l + 1); Int6xoz
if ((r - mid) > THRESHOLD) B*A{@)_
mergeSort(data, temp, mid + 1, r); 4r!8_$fN?G
else 95;q] =U
insertSort(data, mid + 1, r - mid); ~/J:p5?L
xI}h{AF7
for (i = l; i <= mid; i++) { N^A&DrMF
temp = data; LuS]D%
} N<$U:!Z
for (j = 1; j <= r - mid; j++) { \+mc
temp[r - j + 1] = data[j + mid]; aDuO!?Cm
} 0[g8
int a = temp[l]; 0t<]Uf
int b = temp[r]; s4bLL
for (i = l, j = r, k = l; k <= r; k++) { ~HsPYc8Fz
if (a < b) { |?0Cm|?
data[k] = temp[i++]; FA?xp1E
a = temp; =h^cfyj
} else { ?fDF Rms
data[k] = temp[j--]; OwrzD~
b = temp[j]; ZKyK#\v<
} pPm[<^\#S
} ,x}p1EZ
} #*;(%\q}
>}h/$bU
/** =NwmhV
* @param data j8?z@iG
* @param l a9qB8/Gg[
* @param i >I AwNr
*/ EO$_]0yI;_
private void insertSort(int[] data, int start, int len) { Fku9hB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .?9+1.`
} d paZ6g
} GEXT8f(7
} N7k<q=r-
} y% =nhV
hN$6Kx>{
堆排序： utKtxLX"
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package org.rut.util.algorithm.support; B\A2Vm`&
)e|Cd} 2
import org.rut.util.algorithm.SortUtil; *;. l/
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/** mw";l$Aq}
* @author treeroot !1K<iz_8
* @since 2006-2-2 " &'Jw
* @version 1.0 "knSc0,u
*/ Xjc{={@p3
public class HeapSort implements SortUtil.Sort{ 7F.t>$'
B5pMcw
/* (non-Javadoc) (-DA%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $/5<f<%u&)
*/ u{xjFx-
public void sort(int[] data) { m{Jo'*%8f
MaxHeap h=new MaxHeap(); 0{g@j{Lbz
h.init(data); s`M[/i3Nm
for(int i=0;i h.remove(); tJo,^fdfv
System.arraycopy(h.queue,1,data,0,data.length); \]=qGMwFs
} 6*%3O=*
2j8^Z
private static class MaxHeap{ :Jwc'y-]
jC>l<d_
void init(int[] data){ eW#U<x%P
this.queue=new int[data.length+1]; ]uO8
for(int i=0;i queue[++size]=data; pZp|F
fixUp(size); t_5b
} ~(kIr?^
} 6z@OGExmd#
PI~LbDE
private int size=0; w V&{w7
vUl5%r2O4
private int[] queue; E"!C3SC [
'jWd7w~(
public int get() { q/-8sO}q
return queue[1]; -]"=b\Q
} *f|9A/*B3
iaO;i1K5U
public void remove() { rBLkowDP*
SortUtil.swap(queue,1,size--); #=/eu=
fixDown(1); {Buoo~
} /l_$1<c
file://fixdown &RP!9{F<
private void fixDown(int k) { 4K`N3
int j; }ny,Nl
while ((j = k << 1) <= size) { 6dQa|ACX_
if (j < size %26amp;%26amp; queue[j] j++; 6He7A@Eh
if (queue[k]>queue[j]) file://不用交换 ^Cb7R/R3
break; ?PORPv#
SortUtil.swap(queue,j,k); U*F|Z4{W
k = j; F_;oZ
} ^ a%U *>P
} ,\Gn
private void fixUp(int k) { a6=mE?JTB
while (k > 1) { 1L1_x'tT%
int j = k >> 1; .{ ^4I
if (queue[j]>queue[k]) 2f\;#-
break; '8`{u[:
SortUtil.swap(queue,j,k); I$0JAy
k = j; i$[wgvJIV
} W Da;wt
} I7b(fc-r
ZxkX\gl91
} )}L*8 LV
YAnt}]u!"
} M iIH&z
;:1d<Q|
SortUtil： avxI\twAU
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package org.rut.util.algorithm; NhQIpzL)
eCdx(4(\a
import org.rut.util.algorithm.support.BubbleSort; mLX1w)=r
import org.rut.util.algorithm.support.HeapSort; VpSk.WY/ e
import org.rut.util.algorithm.support.ImprovedMergeSort; ie+&@u
import org.rut.util.algorithm.support.ImprovedQuickSort; *FDz20S
import org.rut.util.algorithm.support.InsertSort; QxvxeK!Y
import org.rut.util.algorithm.support.MergeSort; ut%t`Y( ]
import org.rut.util.algorithm.support.QuickSort; t]{qizfOB
import org.rut.util.algorithm.support.SelectionSort; c/ %5IhX?
import org.rut.util.algorithm.support.ShellSort; 7r?O(0>
K0 .f4o
/** LB%_FT5
* @author treeroot KY/}jJW
* @since 2006-2-2 fEc}c.!5
* @version 1.0 a%f{mP$m
*/ Nk=F.fp|/
public class SortUtil { Us.yKAHPV
public final static int INSERT = 1; pWH8ex+
public final static int BUBBLE = 2; j~c7nWfX
public final static int SELECTION = 3; '"QC^Joz
public final static int SHELL = 4; {n%-^9b1{&
public final static int QUICK = 5; |o~<Ti6]
public final static int IMPROVED_QUICK = 6; "T5?<c
public final static int MERGE = 7; ^T"9ZBkb
public final static int IMPROVED_MERGE = 8; uHBX}WH
public final static int HEAP = 9; t+Mr1e
XP5q4BM
public static void sort(int[] data) { =:`1!W0I
sort(data, IMPROVED_QUICK); AC3K*)`E
} (u85$_C
private static String[] name={ K1uN(T.Ju
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (FZL>
}; 8h9t8?
a*&P>Lwe7&
private static Sort[] impl=new Sort[]{ 6"WR}S0o
new InsertSort(), *2crhI*@>
new BubbleSort(), >JS\H6
new SelectionSort(), {y<[1Pms
new ShellSort(), L5%~H?K(
new QuickSort(), >`= '~y8
new ImprovedQuickSort(), FOpOS?Cr'
new MergeSort(), PYr#vOH
new ImprovedMergeSort(), {r.#R| 4v
new HeapSort() mJewUc!<5
}; gwQL9 UYx
lJoMJS;S]}
public static String toString(int algorithm){ &J^@TgqL^
return name[algorithm-1]; |DfYH~@(
} ,^O**k9F
K2nq2Gbn
public static void sort(int[] data, int algorithm) { 1iaNb[:QX
impl[algorithm-1].sort(data); {@g3AG%
} I%%\;Dy
x*5' 6
public static interface Sort { : QSlctW
public void sort(int[] data); CZE5RzG
} t)g1ICt
Zb-TCS+3l
public static void swap(int[] data, int i, int j) { hd9fD[5
int temp = data; AM##:4
data = data[j]; yXY8 oE
data[j] = temp; }r`!p5\$K0
} 0sVCTJ@
} zm2&\8J