[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; E42eOGp9i
} ?R-9W+U%f
int i1=l; .Hc(y7HV
int i2=mid+1; j#0j)k2Q
for(int cur=l;cur<=r;cur++){ D;Gq)]O
if(i1==mid+1) +>7$4`Nb2
data[cur]=temp[i2++]; [!^-J}^g~\
else if(i2>r) 7([h4bg{
data[cur]=temp[i1++]; ;eigOU]
else if(temp[i1] data[cur]=temp[i1++]; `]$?uQ
else $KjTa#[RX7
data[cur]=temp[i2++]; o5\b'hR*#
} uhV0J97
} VGw(6`|!
e75UMWaeC
} ?zq+jLyo
a;$P:C{gj?
改进后的归并排序: }.)s%4p8
U,1AfzlF
package org.rut.util.algorithm.support; Rq~t4sA:
rVQX7l#YI
import org.rut.util.algorithm.SortUtil; Sx] T/xq
Io2mWvu?5
/** P&*sB%B
* @author treeroot Bn]K+h\E
* @since 2006-2-2 R.j1?\
* @version 1.0 !C:rb
*/ Swtbl`,
public class ImprovedMergeSort implements SortUtil.Sort { SW(q$i
{+("C] b
private static final int THRESHOLD = 10; e=/&(Y
dMl+ko
/* tPHS98y
* (non-Javadoc) 7s'- +~
* -%IcYzyA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tn/T6C^)
*/ TTI81:fku
public void sort(int[] data) { c\cZ]RZ
int[] temp=new int[data.length]; y[0`hSQ)~
mergeSort(data,temp,0,data.length-1); 5 HV)[us
} eIPG#A
yno('1B@
private void mergeSort(int[] data, int[] temp, int l, int r) { ,<ya@Fi{
int i, j, k; TbE:||r?^
int mid = (l + r) / 2; XOb}<y)r~
if (l == r) fW0$s`
return; i6no;}j
if ((mid - l) >= THRESHOLD) Yq'4e[i
mergeSort(data, temp, l, mid); MWWu@SY
else NVIWWX9?
insertSort(data, l, mid - l + 1); HV]Ze>}
if ((r - mid) > THRESHOLD) p5]_}I`+2
mergeSort(data, temp, mid + 1, r); 3" Vd==oK~
else 8KjRCm,I
insertSort(data, mid + 1, r - mid); rjojG59U>
:iY$82wQ
for (i = l; i <= mid; i++) { L&w.j0fq
temp = data; XYbyOM VI
} W=-|`
for (j = 1; j <= r - mid; j++) { }VRvsZ
temp[r - j + 1] = data[j + mid]; EZr6oO@Nc
} QocQowz
int a = temp[l]; P{oAObP%
int b = temp[r]; #V 43=
for (i = l, j = r, k = l; k <= r; k++) { `6w#8}
if (a < b) { "G?9b
data[k] = temp[i++]; mIc:2.q^
a = temp; a5wDm
} else { z:G}>fk5
data[k] = temp[j--]; E8[XG2ye
b = temp[j]; rFd@mO
} ubGs/Vzye
} C|e+0aW
} $B _Nc*_e
LdWc X`K
/** 9D4-^M:a
* @param data ;) pl{_
* @param l .H;B=nd*
* @param i Pz~q%J
*/ E <@\>y.[
private void insertSort(int[] data, int start, int len) { xdF guV8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *TnzkNN_,
} %Y',|+Arx
} F'BdQk3o
} %x2b0L\g
} zl)&U=4l
@l>Xnqx)
堆排序： x;U|3{Io
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package org.rut.util.algorithm.support; /yK"t<p
05)|"EX)
import org.rut.util.algorithm.SortUtil; FzhT$7Gw
(T;9us0
/** gM, &Spn
* @author treeroot >l2w::l%
* @since 2006-2-2 plku-O;]
* @version 1.0 $^$ECDOTB
*/ )0|):g
public class HeapSort implements SortUtil.Sort{ )>$^wT
"_)|8|gN
/* (non-Javadoc) x u,htx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4<Kgmy
*/ eBvW#Hzp
public void sort(int[] data) { u\5g3BH
MaxHeap h=new MaxHeap(); nP u`;no
h.init(data); h#O"Q+J9n
for(int i=0;i h.remove(); DPeVKyjU
System.arraycopy(h.queue,1,data,0,data.length); 7vNtv9
} s!`H
8r^j P.V
private static class MaxHeap{ @ RX`>r{_
Lupy:4AD
void init(int[] data){ aH^{Vv$]M@
this.queue=new int[data.length+1]; x\]z j!
for(int i=0;i queue[++size]=data; $kv[iI@
fixUp(size); /&QQ p3
} NxB+?
} _/Tlqzp
3.~h6r5-
private int size=0; /.)2d8,
*k[kV
private int[] queue; Q>[Ce3
oB}K[3uB:t
public int get() { wO!% q[
return queue[1]; i :EO(`
} d}VALjXHX!
O&=KlnI:
public void remove() { >\&= [C
SortUtil.swap(queue,1,size--); OsB?1;:
fixDown(1); zM\IKo_"
} N+hedF@ZU
file://fixdown n5>B LtY
private void fixDown(int k) { c+wuC,
int j; bZK+9IR
while ((j = k << 1) <= size) { R@OSqEnr
if (j < size %26amp;%26amp; queue[j] j++; {9Xm<}%u]]
if (queue[k]>queue[j]) file://不用交换 n{z8Ao%
break; i#tbdx#
SortUtil.swap(queue,j,k); $)l2G;&
k = j; )kF2HF
} gINwvzW{
} p!QR3k.9s
private void fixUp(int k) { *b:u*`@
while (k > 1) { &b!vWX1N
int j = k >> 1; .@Hmg
if (queue[j]>queue[k]) l$=Gvb
break; {clCn
SortUtil.swap(queue,j,k); L%k67>
k = j; A0UV+ -PP
} Lp!0H `L
} 2'|XtSj
^uM_b
} U{HyxZ|q<
T\)dt?Tv#\
} L!?v BL
>eEnQ}Y
SortUtil： 4v0dd p
j/~VP2R`
package org.rut.util.algorithm; @Jkui
,n^TN{#
import org.rut.util.algorithm.support.BubbleSort; ^dheJ]n=k
import org.rut.util.algorithm.support.HeapSort; D xe-XKNc.
import org.rut.util.algorithm.support.ImprovedMergeSort; D7EXqo
import org.rut.util.algorithm.support.ImprovedQuickSort; qwL0~I
import org.rut.util.algorithm.support.InsertSort; $xLEA\s
import org.rut.util.algorithm.support.MergeSort; G% o7BX
import org.rut.util.algorithm.support.QuickSort; ?OdV1xB
import org.rut.util.algorithm.support.SelectionSort; /]pX8 d
import org.rut.util.algorithm.support.ShellSort; PG\\V$}A(
qw6EPC
/** A J<iM)l|
* @author treeroot ~o}moE/ ;O
* @since 2006-2-2 !&'# a
* @version 1.0 u4go*#
*/ x&QNP
public class SortUtil { (qNco8QKu3
public final static int INSERT = 1; %j~9O~-
public final static int BUBBLE = 2; C<zx'lw!
public final static int SELECTION = 3; 2qt=jz\s
public final static int SHELL = 4; xAR^
public final static int QUICK = 5; ac2}3$u
public final static int IMPROVED_QUICK = 6; e_YW~z=6t
public final static int MERGE = 7; 0*37D5jH
public final static int IMPROVED_MERGE = 8; _K 4eD.
public final static int HEAP = 9; _JfJ%YXy
B)(p9]q
public static void sort(int[] data) { +J\L4ri k
sort(data, IMPROVED_QUICK); OI)&vQ5k
} Bq~AU#
private static String[] name={ Rh wt<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]s1TJw [B
}; NTXws4'D
l=Lmr
private static Sort[] impl=new Sort[]{ {LR#(q$1
new InsertSort(), F2Nb5WT
new BubbleSort(), q$e T!'x
new SelectionSort(), )_Z]=5Ds
new ShellSort(), f]@[4<Ny
new QuickSort(), -~QlHp&SY
new ImprovedQuickSort(), Y!K^-Y}
new MergeSort(), |[lxV&SD.
new ImprovedMergeSort(), z6GL,wo#
new HeapSort() (H|%?F;{l
}; eZa3K3^
n?TO!5RZK
public static String toString(int algorithm){ )W_ Y3M,
return name[algorithm-1]; G#_(7X&
} mI{CM: :
aufcd57
public static void sort(int[] data, int algorithm) { R47I\{
impl[algorithm-1].sort(data); >tE,8
} >%?kp[
Mnx')([;W
public static interface Sort { v"I#.{LiH=
public void sort(int[] data); cOz/zD f5
} Pf/_lBtL
v|K'M,E
public static void swap(int[] data, int i, int j) { tF&g3)D:NV
int temp = data; .G~Y`0
data = data[j]; G oHdhne3
data[j] = temp; 5nA *'($j
} ^fq^s T.$
} GX\6J]x=^2