[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; ) C?emTih
} :gvw5h%
int i1=l; p` '8M
int i2=mid+1; n qR8uL>
for(int cur=l;cur<=r;cur++){ 5V{ B,T
if(i1==mid+1) 8,(FJ7OCT,
data[cur]=temp[i2++]; fCq
else if(i2>r) D02_ Jrg
data[cur]=temp[i1++]; ee9nfvG-
else if(temp[i1] data[cur]=temp[i1++]; $d[xSwang
else s?j` _B
data[cur]=temp[i2++]; .%iJin"
} Xw|t.0
} ~gjREl,+D#
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} T==(Pw7R7
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改进后的归并排序: Ai 9UB=[R
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package org.rut.util.algorithm.support; U6R"eQUTV
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import org.rut.util.algorithm.SortUtil; QnWM<6xK"
<`~zKFUQ[
/** b.<>CG'
* @author treeroot ns{BU->f
* @since 2006-2-2 ) ag8]
* @version 1.0 pX nY=
*/ #DL( %=:
public class ImprovedMergeSort implements SortUtil.Sort { 6@2 S*\&
2`-yzm
private static final int THRESHOLD = 10; Xg](V.B6
1 >nl ]yO
/* gx*rxid
* (non-Javadoc) GO=&
* L;n2,b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J:{$\m'
*/ S @EkrC\4n
public void sort(int[] data) { .>K):|Opv
int[] temp=new int[data.length]; m _0D^e7#
mergeSort(data,temp,0,data.length-1); v0ngM)^q
} b0~AN#Es
S;582H9D
private void mergeSort(int[] data, int[] temp, int l, int r) { k]vrqjn Q
int i, j, k; I^5T9}>Q
int mid = (l + r) / 2; ]G0`W6;$]
if (l == r) YEEgDw]BQ
return; x}w"2[fL
if ((mid - l) >= THRESHOLD) '}`|QJ
mergeSort(data, temp, l, mid); (Oc[j{6q
else R"au8f.
insertSort(data, l, mid - l + 1); 2hjR'6h"Y
if ((r - mid) > THRESHOLD) 1D,$Az~.
mergeSort(data, temp, mid + 1, r); A1zqm_X5)P
else HlkG^:)
insertSort(data, mid + 1, r - mid); 2^Tj@P7
T@n-^B!Xq
for (i = l; i <= mid; i++) { 0]F'k8yLN
temp = data; C3Hq&TVf/
} QFI8|i@
for (j = 1; j <= r - mid; j++) { ,C#Mf@b
temp[r - j + 1] = data[j + mid]; x<0-'EF/S
} G%a8'3d,
int a = temp[l]; kH!I&4d&
int b = temp[r]; hLVS}HE2
for (i = l, j = r, k = l; k <= r; k++) { h48JpZ"
if (a < b) { [w%MECTe
data[k] = temp[i++]; 8-N8v *0
a = temp; RaKfYLw
} else { Q9lw~"
data[k] = temp[j--]; %f{1u5+5
b = temp[j]; /\%K7\
} Q]';1#J\
} H$^b.5K
} 9I a4PPEH1
+TzF*Np
/** ?UXKy
* @param data (l28,\Bel
* @param l cT8`l!RD<
* @param i qsB,yckml
*/ -%&_LE9ZtS
private void insertSort(int[] data, int start, int len) { -fl?G%:(!0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FtUOgL)|
} &S}i)Nu6J
} TzXivE@mm
} [<)/ c>Y
} )`RF2Y-A7
`"0#lZ`n
堆排序： C+r<DC3
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package org.rut.util.algorithm.support; &%~2Wm
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import org.rut.util.algorithm.SortUtil; |~mi6 lJ6
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/** ZQT14.$L
* @author treeroot m6aq_u{W
* @since 2006-2-2 +\FTR
* @version 1.0 5!ll #/ {`
*/ /B$"fxFf
public class HeapSort implements SortUtil.Sort{ ckqU2ETpD}
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/* (non-Javadoc) >EFjyhVE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /r#.BXP
*/ sXzxEhp
public void sort(int[] data) { h1.]Nl C
MaxHeap h=new MaxHeap(); |x|#n
h.init(data); Le9^,B@Pb
for(int i=0;i h.remove(); m*L*# ZBS
System.arraycopy(h.queue,1,data,0,data.length); *P_ 3A:_
} r5qp[Ss3F
NymS8hxR
private static class MaxHeap{ =J0X{Ovn4z
x+zz:^yHYf
void init(int[] data){ esH>NH_
this.queue=new int[data.length+1]; 'CT8vt;
for(int i=0;i queue[++size]=data; ^l#Z*0@><~
fixUp(size); #vi `2F
} 5Sd+Cc
} qp*C%U
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private int size=0; +#gJ[Cc
/I{<]m$
private int[] queue; %eCbH`
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public int get() { JcEPwF.
return queue[1]; VnUWUIVJ
} OWsK>egD
]KfjZ!Qh
public void remove() { ?[Od.
SortUtil.swap(queue,1,size--); $m`?x5rL8
fixDown(1); ql5NSQ>{
} "d'D:>z]%
file://fixdown u8pJjn;
private void fixDown(int k) { *<n]"-
int j; G>{Bij44
while ((j = k << 1) <= size) { xU#f>@v!
if (j < size %26amp;%26amp; queue[j] j++; 7/lXy3B4
if (queue[k]>queue[j]) file://不用交换 T:aYv;#0
break; ~6`HJ
SortUtil.swap(queue,j,k); !Q!==*1H
k = j; Hu|;cbK
} {D1"bDZ
} Ml1sE,BT
private void fixUp(int k) { <rc?EV
while (k > 1) { / %}Xiqlrd
int j = k >> 1; q]3bGO;
if (queue[j]>queue[k]) 9L;fT5Tp7
break; C-/<5D j
SortUtil.swap(queue,j,k); 1BK-uv:
k = j; ^ZX71-
} OosxuAC(
} mG2*s ^$
1.YDIB||
} <zE,T@c
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} +^n [B
m@)~.E
SortUtil： s/+@o:
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package org.rut.util.algorithm; X>^St&B}fC
X4LU/f<f
import org.rut.util.algorithm.support.BubbleSort; iJE $3
import org.rut.util.algorithm.support.HeapSort; VdpwZ
import org.rut.util.algorithm.support.ImprovedMergeSort; M<oIo036
import org.rut.util.algorithm.support.ImprovedQuickSort; ~G.'pyW
import org.rut.util.algorithm.support.InsertSort; ohqi4Y!j/~
import org.rut.util.algorithm.support.MergeSort; '`Eb].s*
import org.rut.util.algorithm.support.QuickSort; ].=&^0cg
import org.rut.util.algorithm.support.SelectionSort; s86Ij>VLf
import org.rut.util.algorithm.support.ShellSort; 9|v3lGK(
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/** iB1"aE3
* @author treeroot pIBL85Xe
* @since 2006-2-2 F)'kN2
* @version 1.0 .6Tan2[%
*/ H^{Eh
public class SortUtil { ?|LR@M!S7
public final static int INSERT = 1; {fe[$KQ
public final static int BUBBLE = 2; <eP`Lu"
public final static int SELECTION = 3; 9frLYJz"
public final static int SHELL = 4; !t/I j~o
public final static int QUICK = 5; f QSP]?
public final static int IMPROVED_QUICK = 6; v< qN-zG
public final static int MERGE = 7; - Te+{
public final static int IMPROVED_MERGE = 8; SoX\S|}%6[
public final static int HEAP = 9; lt\. )Y>4
F]kn4zr
public static void sort(int[] data) { z97RNT|Y7U
sort(data, IMPROVED_QUICK); `R@1Sc<*|
} Hd H,
private static String[] name={ YCr:nYm<f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gE$D#PZa
}; xi|T7,\X
c:(Xkzj
private static Sort[] impl=new Sort[]{ LUSBRr8
new InsertSort(), k I
new BubbleSort(), (/TYET_H
new SelectionSort(), ]t$wK
new ShellSort(), ]E/^(T-O
new QuickSort(), Dy`;]-b6u
new ImprovedQuickSort(), Lky<L96
new MergeSort(), ~>vv9-_
new ImprovedMergeSort(), 57 (bd0@8
new HeapSort() 7]se!k,
}; r'!L}^n
\ vf&Ldk
public static String toString(int algorithm){ m,YBk<Bx
return name[algorithm-1]; _p0@1 s(U
} SVKjhZK
bzYj`t?
public static void sort(int[] data, int algorithm) { LYY3*d
impl[algorithm-1].sort(data); l*eJa38
} 3%gn:.9N
DJ)Q,l*|N9
public static interface Sort { MvV\?Lzj
public void sort(int[] data); _Q XC5i
} h"R{{yf2
cQM_kV??!
public static void swap(int[] data, int i, int j) { E6+c{41B
int temp = data; wD+4#=/j
data = data[j]; L\;n[,.
data[j] = temp; "m2g"xa\7
} ndW]S7
} _{$eOwB