[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; lkgB,cflpi
} 6 kAXE\T
int i1=l; ?) VBkA5j
int i2=mid+1; \v([,tiW%
for(int cur=l;cur<=r;cur++){ 4G=KyRKh
if(i1==mid+1) I>spJ5ls
data[cur]=temp[i2++]; );ZxKGjc4
else if(i2>r) n7'X.=o7
data[cur]=temp[i1++]; 9AZpvQ
else if(temp[i1] data[cur]=temp[i1++]; GP=&S|hi
else rs:a^W5t
data[cur]=temp[i2++]; k!sk\~>YO
} -<aN$O
} .T^e8
+ Scw;gO
} ~ ^)4*@i6
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改进后的归并排序: xX{gm'3UYa
6?KJ"Ai9
package org.rut.util.algorithm.support; )zq sn
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import org.rut.util.algorithm.SortUtil; $rmfE
UU]a).rz
/** DbvKpM H
* @author treeroot 0]`%iG|
* @since 2006-2-2 _tpqo>
* @version 1.0 Fs;_z9ej-u
*/ hZLwg7X!
public class ImprovedMergeSort implements SortUtil.Sort { e'1}5Ky
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private static final int THRESHOLD = 10; 0?8{q{ o+
2 1]87$
/* W\JwEb9Y
* (non-Javadoc) [5TGCGxP{
* hQ}B?'>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TSAVXng
*/ U<mFwJ C]
public void sort(int[] data) { mA>u6Rlc
int[] temp=new int[data.length]; *S=zJyAO
mergeSort(data,temp,0,data.length-1); khtYn.eaL
} 8.4+4Vxh
W=@]YI
private void mergeSort(int[] data, int[] temp, int l, int r) { QAmb_:^"d
int i, j, k; *&lNzz5&
int mid = (l + r) / 2; tgB\;nbB
if (l == r) Kn+m9
return; o$+"{3svw?
if ((mid - l) >= THRESHOLD) ^+zhzfJ
mergeSort(data, temp, l, mid); 6Cd% @Q2cr
else Foc) u~
insertSort(data, l, mid - l + 1); U k*HRudt
if ((r - mid) > THRESHOLD) V8{5 y <Y>
mergeSort(data, temp, mid + 1, r); j=~c( B
else ]Uee!-dZ
insertSort(data, mid + 1, r - mid); 'CSIC8M<j
|T@\-8Ok
for (i = l; i <= mid; i++) { [exIK
temp = data; 8rx"D`{|
} vkQkU,q
for (j = 1; j <= r - mid; j++) { yC]X&1,:z
temp[r - j + 1] = data[j + mid]; t^zmvPDK
} Ysz&/ry
int a = temp[l]; V)8d1S
int b = temp[r]; "=97:H{!
for (i = l, j = r, k = l; k <= r; k++) { <i(<|/$
if (a < b) { 2po>%Cp
data[k] = temp[i++]; %t:pG}A>:C
a = temp; b7_uT`<
} else { -1 Ok_h"
data[k] = temp[j--]; Zw`vPvb!
b = temp[j]; ZfYva(zP{Q
} "Wz#<! .r
} P:gN"f6
} 8~>5k
?-`G0(
/** oSOO5dk:z
* @param data dE[nPtstb
* @param l Y]SX2kk(2
* @param i ?4 fXCb]7
*/ 8- U1Y
private void insertSort(int[] data, int start, int len) { XH?}0D(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `Y~EL?
} 30fsVwE2
} q{?ku!cL
} Gw5j6
} lj4D:>Ov
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堆排序： xA-u%Vf7@
nf7l}^/UE
package org.rut.util.algorithm.support; dDAIfe2y
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import org.rut.util.algorithm.SortUtil; 5zqlK-$
v&NC` dVR
/** Gqz<;y
* @author treeroot ,(6U3W*bu
* @since 2006-2-2 wK_I"
* @version 1.0 %6vf~oG
*/ 8d90B9
public class HeapSort implements SortUtil.Sort{ 1,tM
i+2fWi6Z+
/* (non-Javadoc) $ {iV]Xt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }T}9AQ}|
*/ YMidSfi
public void sort(int[] data) { \UdHN=A&
MaxHeap h=new MaxHeap(); )L*6xTa~
h.init(data); Y 7a<3>
for(int i=0;i h.remove(); *<PQp
System.arraycopy(h.queue,1,data,0,data.length); G/2| *H
} Yy$GfjJtL]
>>**n9\q
private static class MaxHeap{ H>x(c|ZBp
1@j0kTJ~m
void init(int[] data){ ]pZxbs&Vb
this.queue=new int[data.length+1]; '8Q:}{
for(int i=0;i queue[++size]=data; [/s^(2%
fixUp(size); \BV$p2m5-
} F ;o ^.
} h@5mVTb}i
SIBNU3;DL
private int size=0; x*G-?Xza)
L8&$o2+07r
private int[] queue; x:h0/f
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public int get() { _%M5 T
return queue[1]; =@ '>|-w|
} 6^vMJ82U
Oie0cz:>:
public void remove() { &i&k 4
SortUtil.swap(queue,1,size--); c~@Z
fixDown(1); _B@=fY(g!
} \GL!x 7s1A
file://fixdown nN=o/zd
private void fixDown(int k) { 2VrO8q(
int j; @WV}VKm
while ((j = k << 1) <= size) { td:GZ %
if (j < size %26amp;%26amp; queue[j] j++; U>bmCK2
if (queue[k]>queue[j]) file://不用交换 =l %
break; @a08*"lbp
SortUtil.swap(queue,j,k); 5J d7<AO_
k = j; %SG**7
} MZyzc{c,
} xWwQm'I2}
private void fixUp(int k) { u&q RK>wLa
while (k > 1) { 1:7 uS.
int j = k >> 1; $\S;f"IM.
if (queue[j]>queue[k]) qSB]Zm<
break; ze+_iQ5
SortUtil.swap(queue,j,k); *SW.K{{
k = j; pzX684
} :[;]6;
} N7S?m@
%\5wHT+)
} k<aKT?Ek>
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} ^hG Y,\K9
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SortUtil： aR3R,6ec
v!\\aG/
package org.rut.util.algorithm; rTBrl[&,q'
AOT +4*)%
import org.rut.util.algorithm.support.BubbleSort; {`2R<O
import org.rut.util.algorithm.support.HeapSort; f L @rv
import org.rut.util.algorithm.support.ImprovedMergeSort; I%.96V
import org.rut.util.algorithm.support.ImprovedQuickSort; gmU_# J%~
import org.rut.util.algorithm.support.InsertSort; 9ghZLQ
import org.rut.util.algorithm.support.MergeSort; .~)[>
import org.rut.util.algorithm.support.QuickSort; wzLR]<6G
import org.rut.util.algorithm.support.SelectionSort; @x9DV{j)V
import org.rut.util.algorithm.support.ShellSort; ?^F*M#%?
[@SLt$9"
/** 4'&j<Ah[#
* @author treeroot oV4+w_rrLc
* @since 2006-2-2 $~h\8
* @version 1.0 RYU(z;+0p
*/ fZoV\a6Kj
public class SortUtil { U}H2!et&,)
public final static int INSERT = 1; 1!u}~E_
public final static int BUBBLE = 2; ( K5w0
public final static int SELECTION = 3; e-$U .cx
public final static int SHELL = 4; Vb${Oy+
public final static int QUICK = 5; :K%{?y
public final static int IMPROVED_QUICK = 6; Yzr RnVr
public final static int MERGE = 7; 'qGKS:8
public final static int IMPROVED_MERGE = 8; l?>sLKo9
public final static int HEAP = 9; ;aZ$qgN*Y
R<}WNZl
public static void sort(int[] data) { TW2OT }
sort(data, IMPROVED_QUICK); zzf;3S?
} ;DMv?-H
private static String[] name={ wzX 1!?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qt+|s&HGt
}; "][MCVYP
@agW{%R:.
private static Sort[] impl=new Sort[]{ 44H#8kV
new InsertSort(), X#l]%IrW!
new BubbleSort(), ^i3~i?\,P
new SelectionSort(), f/spJ<B).4
new ShellSort(), _xgF?#
new QuickSort(), t;P%&:"@M
new ImprovedQuickSort(), !olvP*c"
new MergeSort(), f wN
new ImprovedMergeSort(), %9z N U
new HeapSort() R[eQ}7;+
}; al/3$0#U
a6K1-SR^6)
public static String toString(int algorithm){ sb 3l4(8g
return name[algorithm-1]; 19)fN-0Z
} nSH A,c
:t &ib}v
public static void sort(int[] data, int algorithm) { SvUC8y
impl[algorithm-1].sort(data); I!(.tu6u6c
} ;Qpp[V`
=}S*]Me5
public static interface Sort { n\v\<mVTb7
public void sort(int[] data); x`'2oz=,F4
} ([loWr}QR
ei 1(A
public static void swap(int[] data, int i, int j) { 28l",j)S
int temp = data; >G`=8Ku
data = data[j]; Nrl&"IK|J
data[j] = temp; 3c5=>'^F
} WNkAI9B
} h.Cr;w,2R