[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; *BvdL:t
} (\nEU! Y
int i1=l; l| y.6v
int i2=mid+1; ~[=d{M!$W
for(int cur=l;cur<=r;cur++){ = ?BhtW
if(i1==mid+1) >">Xd@Wk
data[cur]=temp[i2++]; >M0^R}v
else if(i2>r) M(I%QD
data[cur]=temp[i1++]; 5Pf)&iG
else if(temp[i1] data[cur]=temp[i1++]; uN1VkmtDO
else nJ$2RN
data[cur]=temp[i2++]; C~pQJ@bF0
} Ai)>ot
} %<8r`BMo
Ti7 @{7>
} D&i,`j
f$vU$>+[
改进后的归并排序: 9|Ylv:sR
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package org.rut.util.algorithm.support; brG!TJ
1 ^30]2'_
import org.rut.util.algorithm.SortUtil; CugZ!>;^
R / ND f`
/** ] ^?w0A
* @author treeroot )l/ .<`|
* @since 2006-2-2 cc>b#&s
* @version 1.0 lr?SL\D
*/ %dzO*/8cWo
public class ImprovedMergeSort implements SortUtil.Sort { j-VwY/X
h<bhH=6~
private static final int THRESHOLD = 10; KW3<5+w]c
EhW"s%Q
/* 9JX@ck
* (non-Javadoc) Bs|Xq'1M!;
* TY5R=jh=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5g O9 <
*/ 4O.R=c2}7>
public void sort(int[] data) { E" >`
int[] temp=new int[data.length]; ZJm$7T)V
mergeSort(data,temp,0,data.length-1); #`!mQSK
} wmIe x
_l1"X^Aa
private void mergeSort(int[] data, int[] temp, int l, int r) { #9Fk&Lx
int i, j, k; Ul6|LTY
int mid = (l + r) / 2; [h !i{QD
if (l == r) J*Ie# :J]
return; @vXXf/
if ((mid - l) >= THRESHOLD) "C(yuVK1G
mergeSort(data, temp, l, mid); m{$}u@a
else cvE)
insertSort(data, l, mid - l + 1); sC.r$K+k5
if ((r - mid) > THRESHOLD) 4_sJ0=z-
mergeSort(data, temp, mid + 1, r); 6\jbSe
else ZJc{P5a1J
insertSort(data, mid + 1, r - mid); H9i7y,[*
d:>'c=y
for (i = l; i <= mid; i++) { t&F:C
temp = data; 5S_fvW;
} o0>|
for (j = 1; j <= r - mid; j++) { (6NDY5h~=n
temp[r - j + 1] = data[j + mid]; JbJ!,86
} "I:*
int a = temp[l]; g5"I{ol5T~
int b = temp[r]; b/Ma,}
for (i = l, j = r, k = l; k <= r; k++) { 1]5k lJ
if (a < b) { 8F[ ;ma>Z8
data[k] = temp[i++]; NZ&ZK@h}.
a = temp; B$YoglEW:
} else { jDTG15_=
data[k] = temp[j--]; BD;T>M
b = temp[j]; 85)C7tJ-g
} 8_G6X\q};
} 2boyBz}=S
} DpeJx
],[<^=|
/** [Gv8Fn/aG
* @param data FN<>L0
* @param l !bCL/[
* @param i KK1?!7
*/ r&B0-7r
private void insertSort(int[] data, int start, int len) { AXte&l=M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GnUD<P=I
} d$x vEm
} E>i<2
} LAnC8O
} &+A78I
V|B4lGS&
堆排序： >5Lp;
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package org.rut.util.algorithm.support; ]s^+/8d=
+Ek1~i.
import org.rut.util.algorithm.SortUtil; =)c-Xz
53ZbtEwhwr
/** 9QB,%K_:4
* @author treeroot qm_m8
* @since 2006-2-2 (~{Y}n]s
* @version 1.0 !l0"nPM=
*/ 0A~UuH0.
public class HeapSort implements SortUtil.Sort{ U{Oo@ztT
dI%ho<zm]
/* (non-Javadoc) (`E`xb@E,=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?E+f<jol
*/ Y@#N_]oXj
public void sort(int[] data) { yvzH}$!]
MaxHeap h=new MaxHeap(); @R%qP>_
h.init(data); lVq5>:'}^;
for(int i=0;i h.remove(); z80FMulO
System.arraycopy(h.queue,1,data,0,data.length); Cd=$XJ-b
} chUYLX}45
1:^Xd~X
private static class MaxHeap{ PX/{!_mM
{5{VGAD&]>
void init(int[] data){ JrLh=0i9
this.queue=new int[data.length+1]; S2Ez}*plp
for(int i=0;i queue[++size]=data; #-f9>S9_
fixUp(size); Z : xb8]y
} F:P2:s<d-
} 0&I*)Zt9x
cAwqIihZ
private int size=0; un~`|
l=l$9H,
private int[] queue; G,$nq4
uQx/o^
public int get() { ys`oHSf
return queue[1]; uo2k
} ovM;6o
Haktr2I
public void remove() { bfoTGi
SortUtil.swap(queue,1,size--); !DSm[Z1
fixDown(1); ]ilLed
} M@h"FuX:
file://fixdown f"j9C%'*
private void fixDown(int k) { =Hd#"9-
int j; 'fb\t,
while ((j = k << 1) <= size) { T"za|Fo
if (j < size %26amp;%26amp; queue[j] j++; Lhux~,EH
if (queue[k]>queue[j]) file://不用交换 ~!PWJ~U
break; kw2yb
SortUtil.swap(queue,j,k); P)f8lU^z
k = j; '5$@I{z
} 5j]!r
} &}P#<"Fo8Q
private void fixUp(int k) { &Lt$~}*&6
while (k > 1) { GfK%UZ$C
int j = k >> 1; Ym\<@[3+!
if (queue[j]>queue[k]) G]k[A=dg
break; _,(s
SortUtil.swap(queue,j,k); (T pnJq
k = j; 62'9lriQ
} o jxK8_kl
} >5kz#|@P
P,)D0i
} )mOM!I7D@
XtZd% #2},
} yeta)@nH
=,N"% }
SortUtil： {vW0O&[
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package org.rut.util.algorithm; e }C,)
1DAU*^-
import org.rut.util.algorithm.support.BubbleSort; @#W4?L*D
import org.rut.util.algorithm.support.HeapSort; PH8 88O
import org.rut.util.algorithm.support.ImprovedMergeSort; z)^.ai,:0
import org.rut.util.algorithm.support.ImprovedQuickSort; kBC$dW-
import org.rut.util.algorithm.support.InsertSort; BI,]pf;GWv
import org.rut.util.algorithm.support.MergeSort; Tb2#y]27
import org.rut.util.algorithm.support.QuickSort; ZLKbF9lo
import org.rut.util.algorithm.support.SelectionSort; m5N,[^-
import org.rut.util.algorithm.support.ShellSort; C&qo$C
V1d#7rP
/** Q~wS2f`)
* @author treeroot [c1Gq)ht
* @since 2006-2-2 4l*cX1!
* @version 1.0 tF/Ni*\^rV
*/ ~PyS;L}
public class SortUtil { Gq[5H(0/c
public final static int INSERT = 1; 7@gH{p1
public final static int BUBBLE = 2; U%@C<o "
public final static int SELECTION = 3; F?a 63,r
public final static int SHELL = 4; *74/I>i
public final static int QUICK = 5; Y{dX[^[
public final static int IMPROVED_QUICK = 6; zTMLE~w
public final static int MERGE = 7; }8}`A\dgV
public final static int IMPROVED_MERGE = 8; cjGN=|`u
public final static int HEAP = 9; uc"%uc'
@ls/3`E/5E
public static void sort(int[] data) { 9\Ff z&
sort(data, IMPROVED_QUICK); Y$,~"$su|
} ^.@%n1I"5y
private static String[] name={ |dHtv6I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G^h:#T
}; \5<Z[#{
-"H$&p~
private static Sort[] impl=new Sort[]{ YhRy C*b
new InsertSort(), gx^!&>eIb#
new BubbleSort(), kFkI[WKyZ
new SelectionSort(), *wJz0ex7R/
new ShellSort(), !9r%d8!z
new QuickSort(), FhBV.,bU,m
new ImprovedQuickSort(), ]57Ef'N
new MergeSort(), w1zMY:9
new ImprovedMergeSort(), Ug0c0z!b
new HeapSort() I~~":~&
}; ?771e:>S-
x.pg3mVd>
public static String toString(int algorithm){ ^%Y-~yB-
return name[algorithm-1]; [h B$%i]\<
} vA6onYjA
AH'3 5Kf)
public static void sort(int[] data, int algorithm) { QAo/d4
impl[algorithm-1].sort(data); F}[!OYyg
} ~bzac2Rp
iYYuZ.
public static interface Sort { RTg\c[=w
public void sort(int[] data); &F7_0iAP(
} >;j&]]-&
Y%TY%"<
public static void swap(int[] data, int i, int j) { \AoqOC2u
int temp = data; {/5aF_0D.
data = data[j]; rqBoUS4
data[j] = temp; :nl,Ac
} |9FrVO$M
} g__s( IJ