[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; aZ- )w
} zPZy#7/A
int i1=l; ?2QssfB
int i2=mid+1; -SZ^;t
for(int cur=l;cur<=r;cur++){ q^k6.5*"
if(i1==mid+1) ; *r5 d+]
data[cur]=temp[i2++]; .z)&#2E
else if(i2>r) 'd'*4 )]k
data[cur]=temp[i1++]; q>f1V3
else if(temp[i1] data[cur]=temp[i1++]; Q;Xb-\\
else q=Q5s?sQc
data[cur]=temp[i2++]; N(6|TE2
} H"].G^V\6
} kznmA`#jn
p e |k}{
} rWAJL9M
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改进后的归并排序: O~Pbu[C
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package org.rut.util.algorithm.support; 7l%O:M(\
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import org.rut.util.algorithm.SortUtil; x~Y]c"'D
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/** tBp dKJn##
* @author treeroot d%\en&:la
* @since 2006-2-2 d 6j'[
* @version 1.0 (khjP,
*/ m<hR Lo
public class ImprovedMergeSort implements SortUtil.Sort { /a(xUm@.
/5EM;Mx
private static final int THRESHOLD = 10; Z[[@O
>ouHR*
/* `gSqwN<x%
* (non-Javadoc) g;D [XBp
* Z<;am
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _/]4:("
*/ 4F^(3RKZ|
public void sort(int[] data) { +'x|VPY.PG
int[] temp=new int[data.length]; ZQZ>{K
mergeSort(data,temp,0,data.length-1); grp1nWAs
} oX8e}
*&^`Uk,[
private void mergeSort(int[] data, int[] temp, int l, int r) { $x)C_WZj?
int i, j, k; v=RQ"iv8
int mid = (l + r) / 2; ^dM,K p
if (l == r) zkA"2dh
return; ;n?H/(6X8>
if ((mid - l) >= THRESHOLD) "at*G>+
mergeSort(data, temp, l, mid); %nSLe~b
else S{XV{o
insertSort(data, l, mid - l + 1); eZ8~t/8
if ((r - mid) > THRESHOLD) ^~E?7{BL
mergeSort(data, temp, mid + 1, r); !/[/w39D0o
else #"jEc*&=
insertSort(data, mid + 1, r - mid); ckHHD|
h}nceH0s3d
for (i = l; i <= mid; i++) { mhv{6v
temp = data; 2zZ" }Zr#
} Wz`MEyj
for (j = 1; j <= r - mid; j++) { Hw-,sze j"
temp[r - j + 1] = data[j + mid]; |W[BqQIf
} f,wB.MN
int a = temp[l]; \'q 9,tP
int b = temp[r]; `%SFu
for (i = l, j = r, k = l; k <= r; k++) { 82O#Fe q
if (a < b) { 0B7cpw>_J
data[k] = temp[i++]; .BuXg<`
a = temp; pdUrVmW"'
} else { _VFl.U,
data[k] = temp[j--]; 0O5(\8jM
b = temp[j]; sG!SSRL@
} K&0'@#bE\
} tF}Vs}
} c!{v/zOz
ROw9l!YF
/** ]2`PS<a2
* @param data X~(%Y#6
* @param l 3C=ON.1eg
* @param i ~G+o;N,V
*/ vN=e1\
private void insertSort(int[] data, int start, int len) { wxYB-Wh<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $[x2L s~
} zZ@]Kq;.s
} |j3mI\ANF
} aY&He~
} @8a1a3_F
|1iCt1~U
堆排序： v!{mpF
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package org.rut.util.algorithm.support; @Fv"j9j-3G
{x$jGiag+8
import org.rut.util.algorithm.SortUtil; ;-Fr^|do y
tXDO@YH3S
/** T1sb6CT
* @author treeroot )4q0(O)d
* @since 2006-2-2 I CCmE#n
* @version 1.0 E`]lr[
*/ ;<i`6e
public class HeapSort implements SortUtil.Sort{ c'ExZ)RJ
J\VG/)E
/* (non-Javadoc) ^LO=&Cq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {y-7xg~}
*/ k`[ L
public void sort(int[] data) { x;w&JS1V
MaxHeap h=new MaxHeap(); *8ykE
h.init(data); l?F-w;wHN
for(int i=0;i h.remove(); Ss ;C1:
System.arraycopy(h.queue,1,data,0,data.length); cK6M8:KW
} ZU\TA|
= zJY5@^'7
private static class MaxHeap{ ME4Ir
t_%6,?S6
void init(int[] data){ MDI[TNYG
this.queue=new int[data.length+1]; rWzw7T~
for(int i=0;i queue[++size]=data; 1<g,1TR
fixUp(size); aMI\gCB/
} /|v:$iH,C
} z'FD{xdf
T"ors]eI
private int size=0; Twi:BI`.
:j2G0vHIl(
private int[] queue; zOO:`^ m
]"?+R+
public int get() { 2@ 4^ 81
return queue[1]; AT.WXP0$A
} $!F_K
'!Gnr[aR
public void remove() { BCN<l +u
SortUtil.swap(queue,1,size--); |_7nvck
fixDown(1); iX ;E"ov]
} Eo)w f=rE9
file://fixdown 2' fg
private void fixDown(int k) { rWk4)+Tk
int j; @w:6m&KL9
while ((j = k << 1) <= size) { NgH"jg-
if (j < size %26amp;%26amp; queue[j] j++; (5AgI7I,
if (queue[k]>queue[j]) file://不用交换 V0yQ
break; e+J|se4L5
SortUtil.swap(queue,j,k); cu&tdg^q
k = j; --Dd'
} 'U=D6X%V9m
} A'(v]w
private void fixUp(int k) { U-+%e:v
while (k > 1) { uEp v l
int j = k >> 1; /Hxz@=LC1
if (queue[j]>queue[k]) v"x{oD$R
break; ;533;(d*o
SortUtil.swap(queue,j,k); j(JUOief
k = j; D4jf%7X!Lu
} PP{2{
} ~xz3- a/
O}VI8OB(&
} 5G-)>
)'\pa2
} %*4Gx +b
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SortUtil： OG}auM4
cQj{[Wt4
package org.rut.util.algorithm; G}.t!"
<3]Qrjl ,b
import org.rut.util.algorithm.support.BubbleSort; &j2fh!\4
import org.rut.util.algorithm.support.HeapSort; ^ 'jJ~U
import org.rut.util.algorithm.support.ImprovedMergeSort; 8GC(?#Kb
import org.rut.util.algorithm.support.ImprovedQuickSort; 5|zISK%zHS
import org.rut.util.algorithm.support.InsertSort; u[25U;xo
import org.rut.util.algorithm.support.MergeSort; {-X8MisI
import org.rut.util.algorithm.support.QuickSort; P=ARttT`(
import org.rut.util.algorithm.support.SelectionSort; %DJxUuh
import org.rut.util.algorithm.support.ShellSort; K&{*sa r
3'(w6V
/** @r.u8e)l
* @author treeroot ,]ALyWGuX
* @since 2006-2-2 h9Zf4@w
* @version 1.0 ]A*v\Qy
*/ G4Y]fzC
public class SortUtil { b.jxkx\nt
public final static int INSERT = 1; ~$I2{I#W
public final static int BUBBLE = 2; [3":7bB 'E
public final static int SELECTION = 3; pfCNFF*"
public final static int SHELL = 4; C+/D!ZH%P
public final static int QUICK = 5; O{" A3f
public final static int IMPROVED_QUICK = 6; {eR,a-D!7
public final static int MERGE = 7; d9/YW#tm
public final static int IMPROVED_MERGE = 8; Y)%CxaO`
public final static int HEAP = 9; [[fhfV+H
)KvQaC
public static void sort(int[] data) { (C;oot,
sort(data, IMPROVED_QUICK); FBfyW- 7
} S&BJR!FQ
private static String[] name={ ]@@3]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7.O1 ~-
}; qGS]2KY
| ?Js)i
private static Sort[] impl=new Sort[]{ pq;)l(Hi
new InsertSort(), B@wQ[
new BubbleSort(), ;D5B$ @W>
new SelectionSort(), J('p'SlI
new ShellSort(), muSQFIvt
new QuickSort(), R!7emc0T
new ImprovedQuickSort(), wg?:jK
new MergeSort(), V+A1O k)
new ImprovedMergeSort(), A]nDI:pO|
new HeapSort() hM*T{|y
}; L@rKG~{Xy
aO@zeKg
public static String toString(int algorithm){ 0-dhGh?.
return name[algorithm-1]; oh{!u!L`]
} z_XI,u}
!/0XoIf"
public static void sort(int[] data, int algorithm) { .^s%Nh2jM
impl[algorithm-1].sort(data); m9^?p
} 5" U8|
^0t81,`
public static interface Sort { E.Hw|y0_(|
public void sort(int[] data); Q}!U4!{i|p
} H9)$ #r6i
+nKxSjqI
public static void swap(int[] data, int i, int j) { A{hwT,zV:
int temp = data; Gq5)>'D?
data = data[j]; >M7e'}0;
data[j] = temp; u(KeS`
} &Vi"m!Bf
} MS Ui_|7