[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; y>OZ<!`
} MPB6
int i1=l; zZxP= c
int i2=mid+1; T'V(%\w
for(int cur=l;cur<=r;cur++){ ]`NbNr]K
if(i1==mid+1) Q\oUZnD$=
data[cur]=temp[i2++]; }}2kA
else if(i2>r) pFK |4u
data[cur]=temp[i1++]; (kHR$8GFM
else if(temp[i1] data[cur]=temp[i1++]; j@ "`!uPz
else RpXQi*c0
data[cur]=temp[i2++]; l=oVC6C
} x B?:G
} 7HJv4\K
</%H'V@
} ? vlGr5#
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改进后的归并排序: WNx^Rg" >'
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package org.rut.util.algorithm.support; e!8_3BE
R*y[/Aw
import org.rut.util.algorithm.SortUtil; 1^;h:,e6
rEf\|x=st:
/** "tark'
* @author treeroot 4Rm3'Ch
* @since 2006-2-2 W>~%6K>p
* @version 1.0 H>]z=w~
*/ Pjy?&;GvT
public class ImprovedMergeSort implements SortUtil.Sort { Mz^s^aJEE
|:?.-tq
private static final int THRESHOLD = 10; o ,!"E^
So^`L s;S
/* q!TbM"
* (non-Javadoc) =4D_-Q
* $P-m6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +,[3a%c)H
*/ M~Slc*_%
public void sort(int[] data) { g#:XN
int[] temp=new int[data.length]; GW#kaqC1
mergeSort(data,temp,0,data.length-1); :2My|3H\
} z]YhQIU4n8
L1xD$wl
private void mergeSort(int[] data, int[] temp, int l, int r) { d{hYT\7~1(
int i, j, k; G"[pr%?
int mid = (l + r) / 2; C]H <L#)ZU
if (l == r) ~ t H s+
return; ZX;k*OrW
if ((mid - l) >= THRESHOLD) ,OCTm%6e
mergeSort(data, temp, l, mid); de6dLT>m
else _e_%U<\4
insertSort(data, l, mid - l + 1); Sg$\ab$
if ((r - mid) > THRESHOLD) T/;hIX:R
mergeSort(data, temp, mid + 1, r); iq:[+
else 48Lmy<}*
insertSort(data, mid + 1, r - mid); (3h*sd5ly
}Yl=lcvw
for (i = l; i <= mid; i++) { E?mp6R]}%
temp = data; w2+]C&B*
} #}(Df&
for (j = 1; j <= r - mid; j++) { |w2AB7EU
temp[r - j + 1] = data[j + mid]; }#x3IE6'
} S7/v,E
int a = temp[l]; \,!q[nC
int b = temp[r]; fti|3c
for (i = l, j = r, k = l; k <= r; k++) { 1^#Q/J,
if (a < b) { t"p#iia
data[k] = temp[i++]; ]M(f^
a = temp; 9u@h`
} else { FBAC9}V"
data[k] = temp[j--]; } XU:DE
b = temp[j]; kV3j}C"
} :"^< aLj
} PL$F;d
} UMwMXmZNJ
~ p.W*skD
/** k#5e:VOb
* @param data t)Q@sKT6
* @param l ('-}"3
* @param i X9A[
*/ |a$w;s>\
private void insertSort(int[] data, int start, int len) { <57l|}8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /VO@>Hoh
} _0q~s@-
} 8{fz0H.<?
} Ww&- `.
} VQ<i$ I
TDE1z>h+"
堆排序： X&?lDL7?
T\!SA
package org.rut.util.algorithm.support; yO;C3q
.0E4c8R\X
import org.rut.util.algorithm.SortUtil; R(83E B~_
nvK7*-
/** <`_OpNxqW
* @author treeroot K_|~3g
* @since 2006-2-2 yLO &(Mb
* @version 1.0 :@`(}5F4
*/ s|j<b#<xQ
public class HeapSort implements SortUtil.Sort{ E9B*K2l^{
HL}~W}!j
/* (non-Javadoc) % rY8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [F)/mN
*/ 62l0 Z-
public void sort(int[] data) { |id79qY7g
MaxHeap h=new MaxHeap(); XQJ^)d00h
h.init(data); u%1k
for(int i=0;i h.remove(); {dA ~#fW<
System.arraycopy(h.queue,1,data,0,data.length); BH0#Q5
} LL[#b2CKa
EY&C[=
private static class MaxHeap{ EKd3$(^
Gz|%;
void init(int[] data){ x~9z`d{!
this.queue=new int[data.length+1]; Ipz 1+ #s'
for(int i=0;i queue[++size]=data; hY= s9\
fixUp(size); JM-ce8U
} ?)[zLnxc&
} J&"?m.~@
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private int size=0; n*i'vtQ8
ow+Dd[i
private int[] queue; EdAR<VfleA
3hXmYz(
public int get() { b;J0'o^G|
return queue[1]; q= yZx)
} 3']:1B
+8)]m<
public void remove() { 8f,'p}@!d
SortUtil.swap(queue,1,size--); Q_kT}6#(J=
fixDown(1); Z0ncN])
} ,M@m4bx
file://fixdown nKh%E-c
private void fixDown(int k) { [%84L@:h
int j; %g0z)J
while ((j = k << 1) <= size) { #x5N{8
if (j < size %26amp;%26amp; queue[j] j++; @nx}6?p\,
if (queue[k]>queue[j]) file://不用交换 9Z0CF~Y5
break; 9]L!.
SortUtil.swap(queue,j,k); [7e{=\`=
k = j; 02W4-*)
} xZP>g
} bwSRJFqb
private void fixUp(int k) { xQ#Akd=
while (k > 1) { (9KDtr*(2i
int j = k >> 1; =(.mf
if (queue[j]>queue[k]) Rnj Jg?I=
break; ,_Qe}qFU
SortUtil.swap(queue,j,k); XewXTd#x
k = j; s("Cn/ZkS
} J+@MzkpK
} 5X`w&(]m
+f X}O9
} H-_^TB
D/S>w(=
} M9Nk=s! 3
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SortUtil： s!@=rq
d=t}T6.|
package org.rut.util.algorithm; sb}K%-
(ET ;LH3
import org.rut.util.algorithm.support.BubbleSort; @.Z[M
import org.rut.util.algorithm.support.HeapSort; U0h)pdo
import org.rut.util.algorithm.support.ImprovedMergeSort; T2:oWjC3$
import org.rut.util.algorithm.support.ImprovedQuickSort; 8tLT'2+H#
import org.rut.util.algorithm.support.InsertSort; {=bg5I0|a
import org.rut.util.algorithm.support.MergeSort; ]&C:>
import org.rut.util.algorithm.support.QuickSort; YN%=Oq
import org.rut.util.algorithm.support.SelectionSort; j<ABO")v
import org.rut.util.algorithm.support.ShellSort; %tzN@
s;B j7]
/** pcI&
* @author treeroot M<{5pH(K
* @since 2006-2-2 !fi &@k
* @version 1.0 9h:jFhsA9
*/ z^gQ\\,4
public class SortUtil { `1fJ:b/M
public final static int INSERT = 1; | V.S.'
public final static int BUBBLE = 2; xb =8t!
public final static int SELECTION = 3; &/>;LgN
public final static int SHELL = 4; 0" U5oP[
public final static int QUICK = 5; "UQr:/
public final static int IMPROVED_QUICK = 6; Gur8.A;Y
public final static int MERGE = 7; tt6. jo
public final static int IMPROVED_MERGE = 8; yhcNE8mkQ/
public final static int HEAP = 9; =vqsd4
QKp+;$SE'
public static void sort(int[] data) { +cz"`T`X 2
sort(data, IMPROVED_QUICK); .cg=
} r5MxjuOB1
private static String[] name={ aBXYri
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;cv.f>Cm
}; /d0Q>v.g
f >mhFy
private static Sort[] impl=new Sort[]{ ,f8}q]FTA
new InsertSort(), /S:w&5e
new BubbleSort(), n-b>m7O(
new SelectionSort(), k{gl^
new ShellSort(), 42rj6m\
new QuickSort(), yz[%MXI
new ImprovedQuickSort(), +1otn~(E
new MergeSort(), Nb~,`bu,2
new ImprovedMergeSort(), + ,@ FxZl
new HeapSort() &`9j)3^J.
}; e>L5.~i
z.eJEK
public static String toString(int algorithm){ Jj2g5={
return name[algorithm-1]; 2y3?!^$
} O&`U5w
UWQtvQ f
public static void sort(int[] data, int algorithm) { ;[(=kOI
impl[algorithm-1].sort(data); .:w#&yM [U
} f ,tW_g
\hs/D+MCk
public static interface Sort { YV5Yx-+3w$
public void sort(int[] data); :PgF
} 7JbY}@
=nJ{$%L\x,
public static void swap(int[] data, int i, int j) { <+V-k|
int temp = data; ?qju DD
data = data[j]; \Dn&"YG7
data[j] = temp; z%OuI 8"'
} R=!kbBK>\
} Q;4}gUmI$