[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; iLt2L;v>h
} j Gp&P
int i1=l; 3GL,=q
int i2=mid+1; 3y%,f|ju
for(int cur=l;cur<=r;cur++){ G]n_RP$G
if(i1==mid+1) Al1}Ir
data[cur]=temp[i2++]; tbXl5x0
else if(i2>r) 2!_DkE
data[cur]=temp[i1++]; 8F K%7\V
else if(temp[i1] data[cur]=temp[i1++]; 2Krh&
else SE$~Wbj?
data[cur]=temp[i2++]; C %i{{Y&l
} g#q7~#9
} UOpSH{N
U4NH9-U'
} YuUJgt .1
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改进后的归并排序: 7J;\&q'
/|p\l"
package org.rut.util.algorithm.support; 5gSe=|we*p
M%YxhuT0
import org.rut.util.algorithm.SortUtil; eiQ42x@Z
IP
/** $ ~%w21?&
* @author treeroot '2Lx>nByk
* @since 2006-2-2 xOx=Z\ c
* @version 1.0 /Un\P
*/ &`IJ55Z-)
public class ImprovedMergeSort implements SortUtil.Sort { `x`zv1U
,<BV5~T.|
private static final int THRESHOLD = 10; -W{ !`<8D
6j Rewj
/* ?PYZW5
* (non-Javadoc) 5\Rg%Ezl
* C]Q`!e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }X6w"
*/ ]$BC f4:
public void sort(int[] data) { :*ZijN*{)$
int[] temp=new int[data.length]; VHi'~B#'*
mergeSort(data,temp,0,data.length-1); <@$+uZt+
} S.Q:O{]
p}Um+I=1
private void mergeSort(int[] data, int[] temp, int l, int r) { B7wzF"
int i, j, k; 29^(weT"]
int mid = (l + r) / 2; `MHixQ;j
if (l == r) Q@uWh:
return; Ob/i_
if ((mid - l) >= THRESHOLD) }9 ]7V<
mergeSort(data, temp, l, mid); :PK2! 0nK
else "A*;V
insertSort(data, l, mid - l + 1); {"2Hv;x
if ((r - mid) > THRESHOLD) Mh2Zj
mergeSort(data, temp, mid + 1, r); {oS/Xa
else r~G amjS
insertSort(data, mid + 1, r - mid); >`l^ C
;H3~r^>c
for (i = l; i <= mid; i++) { yIC C8M
temp = data; *a^wYWa
} <iBn-EG l>
for (j = 1; j <= r - mid; j++) { `oTV)J'~
temp[r - j + 1] = data[j + mid]; CTe!jMZ=
} ;Y,zlq2
int a = temp[l]; e8E'X
int b = temp[r]; XmaRg{22
for (i = l, j = r, k = l; k <= r; k++) { S5:&_&R8[
if (a < b) { 8>9MeDE
data[k] = temp[i++]; $DaQM'-
a = temp; :r2d%:h%2
} else { RG=i74a
data[k] = temp[j--]; voFg6zoV_
b = temp[j]; bXeJk]#y
} a)*(**e$*i
} iaJLIrl
} E5#ff5
\<hHZS
/** +4p=a [
* @param data * H~=dPC
* @param l [%P[ x]-
* @param i f1S%p
*/ HRyhq;C
private void insertSort(int[] data, int start, int len) { ]4r&Q4d>O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c_>AbF{
} ]a`"O
} |S~$IFN4
} gb4$W@N7V
} +tlBOl$
Ljiw9*ZI
堆排序： >xA(*7
ArjRoXDE
package org.rut.util.algorithm.support; OnU-FX<
'BUfdb8d
import org.rut.util.algorithm.SortUtil; &'`ki0Xh;
NHQoP&OG
/** yVQW|D0,j
* @author treeroot .<E7Ey#
* @since 2006-2-2 5i}g$yjZ<
* @version 1.0 upaQoX/C
*/ ;<GK{8
public class HeapSort implements SortUtil.Sort{ {>PEl;,-
B873UN
/* (non-Javadoc) @LFB}B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r,3\32[?
*/ R)4,f~@"
public void sort(int[] data) { >Q'*~S@v3
MaxHeap h=new MaxHeap(); #C'E'g0
h.init(data); *VHWvj
for(int i=0;i h.remove(); H!6+x*P0
System.arraycopy(h.queue,1,data,0,data.length); 4e?bkC
} H DD)AM&p
&EYoviFp
private static class MaxHeap{ >j7]gi(
P_b!^sq9
void init(int[] data){ w ~"%&SNN
this.queue=new int[data.length+1]; E^gN]Z"O
for(int i=0;i queue[++size]=data; ?bu=QV@
fixUp(size); p5py3k
} )*R';/zaI
} MIyT9",Pl
,6#%+u}f
private int size=0; q!+:zZu
]NtBP
private int[] queue; :>0,MO.^~K
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public int get() { vC^{,?@
return queue[1]; a\~118 !
} Um4DVg5
wv\V&U$
public void remove() { $iMLT8U
SortUtil.swap(queue,1,size--); Qg]A^{.1
fixDown(1); wW8[t8%43
} ,j9?9Z7R
file://fixdown ._t1eb`m{
private void fixDown(int k) { {-MjsBR
int j; fFoZ!H
while ((j = k << 1) <= size) { `KE]RTq
if (j < size %26amp;%26amp; queue[j] j++; I<XYLe[_S
if (queue[k]>queue[j]) file://不用交换 I-1NZgv
break; SjY|aW+wAL
SortUtil.swap(queue,j,k); xG(iSuz
k = j; ycwkF$7
} CW/<?X<!n
} KK5_;<
private void fixUp(int k) { -"{g kjuv
while (k > 1) { ,%BDBZ
int j = k >> 1; ]T&d_~l
if (queue[j]>queue[k]) R/Z7}QW
break; #6~Bg)7AM
SortUtil.swap(queue,j,k); =9`UcTSi6p
k = j; (2QfH$HEk
} >qOj^WO~
} .)Pul|)d
]zCD1*)
} BX6kn/i
@HSK[[?
} ;<;~;od*/
hF5T9^8
SortUtil： {~j/sto-:
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package org.rut.util.algorithm; Yh;(puhyA
2_6ON
import org.rut.util.algorithm.support.BubbleSort; cH4PrMm&
import org.rut.util.algorithm.support.HeapSort; C^5 V
import org.rut.util.algorithm.support.ImprovedMergeSort; \x\N?$`ANc
import org.rut.util.algorithm.support.ImprovedQuickSort; >T\@j\X4
import org.rut.util.algorithm.support.InsertSort; IbJl/N%o
import org.rut.util.algorithm.support.MergeSort; O:a=94
import org.rut.util.algorithm.support.QuickSort; >dJ~
import org.rut.util.algorithm.support.SelectionSort; $+ N~Fa
import org.rut.util.algorithm.support.ShellSort; `W" ;4A
ij~-
/** S0gxVd(
* @author treeroot h^qZi@L
* @since 2006-2-2 F u^j- Io
* @version 1.0 b62B|0i
*/ Ctn?O~u
public class SortUtil { &l!T2PX!
public final static int INSERT = 1; J .TK<!
public final static int BUBBLE = 2; $~/cxLcT
public final static int SELECTION = 3; r\FZ-gk}Q
public final static int SHELL = 4; = &?&}pVF
public final static int QUICK = 5; rly%+B `/
public final static int IMPROVED_QUICK = 6; HRjbGc|[
public final static int MERGE = 7; 3&5b!Y
public final static int IMPROVED_MERGE = 8; o)n)Z~
public final static int HEAP = 9; D/ sYH0.V$
l?rLadvc
public static void sort(int[] data) { |5:2?S2R
sort(data, IMPROVED_QUICK); o1?-+P/
} ;ND[+i2MN
private static String[] name={ >SLmlK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p >ua{}!L
}; -*~ @?
vfvp#
private static Sort[] impl=new Sort[]{ sf[|8}(
new InsertSort(), 42A'`io[w]
new BubbleSort(), Y'bz>@1(
new SelectionSort(), MP<]-M'|<
new ShellSort(), W[qy4\.B
new QuickSort(), rFkZ'rp74b
new ImprovedQuickSort(), $pAVTz
new MergeSort(), `?WN*__["
new ImprovedMergeSort(), aaw[ia_EL
new HeapSort() 6&0G'PMf
}; 0sH~yvM5
|HYST`
public static String toString(int algorithm){ %6rSLBw3
return name[algorithm-1]; V9qA'k
} Oq,@{V@)9k
>;Vfs{Z(q
public static void sort(int[] data, int algorithm) { &7>]# *
impl[algorithm-1].sort(data); .taP2^2Z
} G!=(^G@J;
s3yGL
public static interface Sort { Skr0WQ
public void sort(int[] data); Yt,MXm\
} ^Go,HiB
44B D2`nF
public static void swap(int[] data, int i, int j) { XqUQ{^;aI
int temp = data; XksI.]tfj
data = data[j]; v_pe=LC{-e
data[j] = temp; n}e%c B
} Im!b-1
} @>.aQE