[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; |Td_S|:d
} 26M~<Ic
int i1=l; q&Q/?g>f
int i2=mid+1; UIn^_}jF`
for(int cur=l;cur<=r;cur++){ ?gLAWz
if(i1==mid+1) /M:H9Z8!
data[cur]=temp[i2++]; V7P6zAJy
else if(i2>r) oB4#J*
data[cur]=temp[i1++]; `Z:3`7c
else if(temp[i1] data[cur]=temp[i1++]; ;J'OakeVO
else "MTWjW*6
data[cur]=temp[i2++]; z4g+2f7h-X
} .?f:Nb.O
} Ee8--
JPLI @zX^
} 7ZQ'h3K
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改进后的归并排序: `0?^[;[u[
9<v}LeX
package org.rut.util.algorithm.support; sW?B7o?
bjlkX[{}I
import org.rut.util.algorithm.SortUtil; or7pJy%4"
7gm:ZS
/** z`OkHX*+2|
* @author treeroot ZY)%U*jWU
* @since 2006-2-2 mY`@'
* @version 1.0 3q"7K
*/ SBX|Bcyk*
public class ImprovedMergeSort implements SortUtil.Sort { Yc d3QRB
vb %T7
private static final int THRESHOLD = 10; ;,dkJ7M
[.a;L">
/* Mm.Ql
* (non-Javadoc) & N;pH
* V/+Jc(N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Evkt_vvf
*/ PRwu
public void sort(int[] data) { Q3,=~}ZNK
int[] temp=new int[data.length]; "c,!vc4
mergeSort(data,temp,0,data.length-1); tn{8u7
} }'TTtV:Q
?gN9kd)
private void mergeSort(int[] data, int[] temp, int l, int r) { 6Hwxx5>r
int i, j, k; D M}s0O$0
int mid = (l + r) / 2; "7d.i(vw
if (l == r) a1|c2kT
return; .uKx>YB}
if ((mid - l) >= THRESHOLD) 7WP%J-
mergeSort(data, temp, l, mid); xorTL8
else T/5"}P`
insertSort(data, l, mid - l + 1); <raG07{!*
if ((r - mid) > THRESHOLD) V!xwb:J
mergeSort(data, temp, mid + 1, r); ;R!*I%
else Mn@$;\:
insertSort(data, mid + 1, r - mid); xg} ug[
<BPRV> 0X
for (i = l; i <= mid; i++) { +2Ql~w@$^l
temp = data; ]`d2_mu
} JOHRmfqR
for (j = 1; j <= r - mid; j++) { +0"x|$f~
temp[r - j + 1] = data[j + mid]; `L\)ahM
} thptm
int a = temp[l]; } L <,eV
int b = temp[r]; cOb4c*
for (i = l, j = r, k = l; k <= r; k++) { \?&Au
if (a < b) { :+:6_x
data[k] = temp[i++]; On&L#pf
a = temp; -\Z `z}D
} else { W' ep6O
data[k] = temp[j--]; J$QBI&D
b = temp[j]; LN^UC$[tk
} Gs_qO)~xo
} 9 mPIykAj8
} 'gDe3@ci!
DbtF~`3, .
/** 4LsHs
* @param data KDD@%E
* @param l @rwU 1T33
* @param i xGRT"U(
*/ W2eAhz&
private void insertSort(int[] data, int start, int len) { ~@Kf2dHes
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sofu
} kaQ2A
} CZ3].DA|z
} 9!}q{2j
} G52Z)^
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堆排序： MCU9O
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package org.rut.util.algorithm.support; ^.vmF>$+I
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import org.rut.util.algorithm.SortUtil; rl?7W];
s<&[\U
/** TsHF tj9S
* @author treeroot EgNH8i
* @since 2006-2-2 `c(\i$1JY)
* @version 1.0 q (>c`5
*/ L2fVLKH
public class HeapSort implements SortUtil.Sort{ qS.)UaA
TnA?u (R%
/* (non-Javadoc) xo Gb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yN\e{;z`
*/ :wipE]~4t
public void sort(int[] data) { -;pOh;WG
MaxHeap h=new MaxHeap(); ((|IS[
h.init(data); 9&K/GaG
for(int i=0;i h.remove(); .N"~zOV<#
System.arraycopy(h.queue,1,data,0,data.length); I4D<WoU;dJ
} [se^.[0,
.X `C^z]+
private static class MaxHeap{ |s=`w8p
8Kk\*8 <
void init(int[] data){ OCnFEX"
this.queue=new int[data.length+1]; [U.v:tR
for(int i=0;i queue[++size]=data; Rri`dmH
fixUp(size); 6Cc7ejt|u
} VT=K"`EpQ
} mxJXL":|
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private int size=0; )~ z Z'^
L.B~ax.|Z
private int[] queue; UFENy."P
kdcQw7G
public int get() { zOGR+Gq_Z
return queue[1]; %0XvJF)s
} S LGW:
"8(U\KaX
public void remove() { eH <Jng
SortUtil.swap(queue,1,size--); 5v9Vk`3'
fixDown(1); 6t}XJB$+7
} q*8lnk
file://fixdown 2 9#]Vr
private void fixDown(int k) { J%Mnjk^_\S
int j; 'RTtE
while ((j = k << 1) <= size) { QCpM|,drS
if (j < size %26amp;%26amp; queue[j] j++; ;h~er6&
if (queue[k]>queue[j]) file://不用交换 V1<`%=%_W
break; +a$|Sc
SortUtil.swap(queue,j,k); X:=c5*0e
k = j; ut&/\k=N
} 6 h'&6
} ;7rv
private void fixUp(int k) { c2<,|D|
while (k > 1) { k^An97J
int j = k >> 1; saW!9HQj
if (queue[j]>queue[k]) <1@ (ioPH
break; {1~T]5
SortUtil.swap(queue,j,k); u) *Kws
k = j; WRpyr
} eVt1d2.O
} yn~P{}68
j*zD0I]
} q;A;H)?g
lTz6"/
} vV^dm)?
Dp!zk}f|
SortUtil： ]b}B2F'n
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package org.rut.util.algorithm; DDw''
MFwO9"<A
import org.rut.util.algorithm.support.BubbleSort; YBjdp=als
import org.rut.util.algorithm.support.HeapSort; tu}>:mk
import org.rut.util.algorithm.support.ImprovedMergeSort; Rs7|}Dl}
import org.rut.util.algorithm.support.ImprovedQuickSort; !buz<h
import org.rut.util.algorithm.support.InsertSort; N.hzKq][
import org.rut.util.algorithm.support.MergeSort; /fwgqFVk
import org.rut.util.algorithm.support.QuickSort; {exrwnIZj
import org.rut.util.algorithm.support.SelectionSort; *<9$D
import org.rut.util.algorithm.support.ShellSort; <z)E(J\
tZho)[1
/** ]J@/p:S>
* @author treeroot P!<[U!<hH
* @since 2006-2-2 ,rO[mNk9@
* @version 1.0 *%A}x
*/ k4y}&?$B
public class SortUtil { rK|*hcy
public final static int INSERT = 1; va,~w(G
public final static int BUBBLE = 2; A6p`ma $L
public final static int SELECTION = 3; {a"RXa
public final static int SHELL = 4; &]iKriG
public final static int QUICK = 5; $f-hUOuyo
public final static int IMPROVED_QUICK = 6; li/aN
public final static int MERGE = 7; ^^}Hs-{T
public final static int IMPROVED_MERGE = 8; LwdV3vb#
public final static int HEAP = 9; 5Op_*N{V
3!#/k+,C
public static void sort(int[] data) { EW(J5/mn
sort(data, IMPROVED_QUICK); FpVV4D
} pFO^/P'
private static String[] name={ ]~jN^"o_B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )bDnbO$s_
}; r@$ w*%
~F[L4y!sL
private static Sort[] impl=new Sort[]{ ][:rLs
new InsertSort(), ZkWL_ H)
new BubbleSort(), 0I%: BT
new SelectionSort(), `ROG~0lN(
new ShellSort(), <avQR9'&
new QuickSort(), 5H !y46z
new ImprovedQuickSort(), Tr.hmGU
new MergeSort(), >K:u?YD[
new ImprovedMergeSort(), 4#BRx#\O
new HeapSort() m<@z}%v-
}; }ugxN0
d2jr8U
public static String toString(int algorithm){ 5*G%IR@@LK
return name[algorithm-1]; Qv{,wytyO
} >*qQ+_
"J19*<~
public static void sort(int[] data, int algorithm) { , =y#m-9
impl[algorithm-1].sort(data); ClQe4uo{
} x';uCKWV
CL9yEy"V
public static interface Sort { r"]'`qP,
public void sort(int[] data); W{Z^n(f4
} ;l!`C':'
yrr) y
public static void swap(int[] data, int i, int j) { qd6fU^)i
int temp = data; JYmAn?o-
data = data[j]; GyC)EFd
data[j] = temp; +5X DF
} \l,rpVv5m
} 5%i:4sMx *