[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; cz&FOP+!
} 7&l
int i1=l; 0Oe@0L%^3"
int i2=mid+1; Z</$~ T
for(int cur=l;cur<=r;cur++){ ]UFf-
if(i1==mid+1) 7NoB
data[cur]=temp[i2++]; 0dXZd2oK@
else if(i2>r) xqM R[W\x
data[cur]=temp[i1++]; 'rq [P",
else if(temp[i1] data[cur]=temp[i1++]; oy/#,R_n%
else z4_>6sf{
data[cur]=temp[i2++]; j.AAY?L
} <7?MutHM-
} H[!by)H
m:X;dcq'3
} d&.)Dw
Y 1LE.{
改进后的归并排序: T9N /;3
#{i\t E
package org.rut.util.algorithm.support; Y~fds#y0
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import org.rut.util.algorithm.SortUtil; ]e)<CE2
#}e)*(
/** ;Fp"]z!Qh+
* @author treeroot '.d el7s
* @since 2006-2-2 au0)yg*V1
* @version 1.0 Jr\4x7a;`~
*/ v=9:N/sW
public class ImprovedMergeSort implements SortUtil.Sort { ,%>/8*
LT#*nr
private static final int THRESHOLD = 10; FW=oP>f]w
AqE . TK
/* /,GDG=ra
* (non-Javadoc) 95?$O~I
* gbQrSJs!Zh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ix*n<lCoC
*/ dM#\h*:=
public void sort(int[] data) { o!\Vk~Vi&
int[] temp=new int[data.length]; ~hYG%
mergeSort(data,temp,0,data.length-1); 0j_`7<,:
} a|lcOU
^MQ7*g6o
private void mergeSort(int[] data, int[] temp, int l, int r) { 9M<qk si
int i, j, k; ]NG`MZ
int mid = (l + r) / 2; <E!M<!h
if (l == r) <|s|6C
return; *,@dt+H!y
if ((mid - l) >= THRESHOLD) ] 6M- s
mergeSort(data, temp, l, mid); kCLz@9>FQ
else XQHvs{Po
insertSort(data, l, mid - l + 1); A;q}SO%b
if ((r - mid) > THRESHOLD) |brl<*:
mergeSort(data, temp, mid + 1, r); tE=P9 \4
else 6\/C]![%
insertSort(data, mid + 1, r - mid); ZIkXy*<(
|V%Qp5 XJ
for (i = l; i <= mid; i++) { $(.[b][S
temp = data; ZU7,=B=
} /&cb`^"U^
for (j = 1; j <= r - mid; j++) { rFdq \BSi
temp[r - j + 1] = data[j + mid]; wUW+S5"K
} \ec,=7S<Zf
int a = temp[l]; 7 45Uo'
int b = temp[r]; JX`+b
for (i = l, j = r, k = l; k <= r; k++) { DY0G;L3
if (a < b) { zF3fpEKe
data[k] = temp[i++]; |jO&qT]{
a = temp; OUS@)Tyh
} else { GC~Tfrf=r
data[k] = temp[j--]; qZG "{8
b = temp[j]; vfcj,1
} UIovv%7zZ
} YPFjAQ
} |SQ5Sb
Et4gRS)\
/** ixE72bX
* @param data d%u|) =7
* @param l \h,S1KmIBD
* @param i /\_0daUx
*/ oCXBek?\
private void insertSort(int[] data, int start, int len) { rRly0H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wh[XJ_xY
} 11Pm lzy
} mJ)o-BV
} j%#n}H
} <p-R{}8
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堆排序： `N]!-=o
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package org.rut.util.algorithm.support; al(t-3`<
E[)`+:G]
import org.rut.util.algorithm.SortUtil; Z Z\,iT
xQ-]Iw5
/** -c~nmPEG6
* @author treeroot {: T'2+OH>
* @since 2006-2-2 gH(,>}{^K
* @version 1.0 K8ecSs}}J
*/ b'3w.%^
public class HeapSort implements SortUtil.Sort{ 'Oyz/P(p
E#Smi507p
/* (non-Javadoc) Z)~.OqRw]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aP>%iRk'J!
*/ )lTkqz8v
public void sort(int[] data) { Z455g/=ye
MaxHeap h=new MaxHeap(); $NWXn,Y'
h.init(data); N3!x7J7A
for(int i=0;i h.remove(); ^} %OqP
System.arraycopy(h.queue,1,data,0,data.length); >Ke4lO"
} ^uD r
Dny5X.8
private static class MaxHeap{ V{HP8f91
g0:mm,t\
void init(int[] data){ _%?}e|epy
this.queue=new int[data.length+1]; '+hiCX-_
for(int i=0;i queue[++size]=data; qfd/t<?|D
fixUp(size); Cb%?s
} oe=^CeW"
} 4. 7m*
_{_ybXG|
private int size=0; 1 `hj]@.]
/EZF5_`bT
private int[] queue; MN}@EQvW==
&}_E~jKK
public int get() { 4onRO!G,
return queue[1]; w4\b^iJz
} f R$E*Jd
{0 IEizQ|i
public void remove() { h# c.HtVE
SortUtil.swap(queue,1,size--); %AwR4"M
fixDown(1); suC]
} _VLc1svv
file://fixdown )$p<BLU
private void fixDown(int k) { MDZ,a0?4t
int j; D1}Bn2BM$
while ((j = k << 1) <= size) { Rq-BsMX!A
if (j < size %26amp;%26amp; queue[j] j++; hX#y7m
if (queue[k]>queue[j]) file://不用交换 66NJ&ac
break; U p=J&^.
SortUtil.swap(queue,j,k); O8%+5l`T!
k = j; =;#+8w=^
} 3xj ?}o
} JL5 )
private void fixUp(int k) { C_mPw
while (k > 1) { a/A$ MXZ_
int j = k >> 1; J!b v17H"
if (queue[j]>queue[k]) Q*u4q-DE
break; )kfj+/
SortUtil.swap(queue,j,k); NokAP|<y
k = j; zy"wQPEE
} ;m`k#J?
} uH!uSB2
JKN0:/t7Q
} klmRU@D
=~}\g;K1Q
} KSe`G;{
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SortUtil： fs_6`Xt
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package org.rut.util.algorithm; mxt fKPb
$9k7A 8K
import org.rut.util.algorithm.support.BubbleSort; G;#-CT
import org.rut.util.algorithm.support.HeapSort; BQmHYar
import org.rut.util.algorithm.support.ImprovedMergeSort; CV&+^_j'k
import org.rut.util.algorithm.support.ImprovedQuickSort; s ~c_9,JK
import org.rut.util.algorithm.support.InsertSort; b9b384Q1O
import org.rut.util.algorithm.support.MergeSort; gmtp/?>e
import org.rut.util.algorithm.support.QuickSort; Jn!-Wa,
import org.rut.util.algorithm.support.SelectionSort; f86h"#4
import org.rut.util.algorithm.support.ShellSort; =m]|C1x
5$9g4
/** ye!}hm=w
* @author treeroot lJ1_Zs `
* @since 2006-2-2 ZZ|a`U
* @version 1.0 E:'TZ4Z
*/ /qM:;:N%j
public class SortUtil { N.R,[K
public final static int INSERT = 1; ?"-%>y@w
public final static int BUBBLE = 2; ElLDSo@WvR
public final static int SELECTION = 3; -]HPDN,OB
public final static int SHELL = 4; j:ze5FA+
public final static int QUICK = 5; s~(!m. R
public final static int IMPROVED_QUICK = 6; Hs,pY(l^
public final static int MERGE = 7; 6%?bl{pNn
public final static int IMPROVED_MERGE = 8; r1dP9MT\8
public final static int HEAP = 9; pD;'uEFBQ
AT*J '37
public static void sort(int[] data) { 7L2$(d4
sort(data, IMPROVED_QUICK); |&!04~s;E
} 0*G =~:
private static String[] name={ 6?GR+;/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r:.3P
}; b'F#Y9
R{={7.As+
private static Sort[] impl=new Sort[]{ 8NU<lV`
new InsertSort(), I2"F2(>8K
new BubbleSort(), ;>%@
new SelectionSort(), P|c[EUT
new ShellSort(), $d\]s]}`
new QuickSort(), ^I2+$
new ImprovedQuickSort(), mY!os91KoO
new MergeSort(), =SMI,p&
new ImprovedMergeSort(), -CePtq`
new HeapSort() .&Tcds
}; oTS/z\C"<u
zb<YYJ]
public static String toString(int algorithm){ OAx5 LTd
return name[algorithm-1]; `?@7T-v
} b/^i
oZVq}}R
public static void sort(int[] data, int algorithm) { nKxu8YAJe
impl[algorithm-1].sort(data); YKCd:^u
} :g@H=W
,gYbi-E
public static interface Sort { NHI(}Ea|]
public void sort(int[] data); Js{X33^Ju
} KYe@2 6
r5#8Vzr
public static void swap(int[] data, int i, int j) { vSyR% j
int temp = data; YS$42J_T
data = data[j]; S:b-+w|*
data[j] = temp; ]dvNUD
} m[l[yUw#
} 8nKZ