[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; X6Z/xb@
} q{
int i1=l; cE`qfz
int i2=mid+1; %7`eT^
for(int cur=l;cur<=r;cur++){ {na>)qzKP
if(i1==mid+1) VhLfSN>W
data[cur]=temp[i2++]; q]pHD})O
else if(i2>r) @|"K"j#
data[cur]=temp[i1++]; n+&8Uk
else if(temp[i1] data[cur]=temp[i1++]; P(I%9
else Ws2?sn#x
data[cur]=temp[i2++]; A#?Cts,M
} S2|pn\0V
} /SM 7t_
73S N\
} eB9&HD:
zBq&/?
改进后的归并排序: A7#nBHwxZ
6 F39'
package org.rut.util.algorithm.support; NQuqM`LSQ
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import org.rut.util.algorithm.SortUtil; ?RsPAL
,d lq2
/** i9qIaG/
* @author treeroot qhTVsZ:{C
* @since 2006-2-2 XABP}|aWK
* @version 1.0 VuTTWBx
*/ wBw(T1VN
public class ImprovedMergeSort implements SortUtil.Sort { 4Ng:7C2
V8WSJ=-&
private static final int THRESHOLD = 10; Z*b l J5YC
wE<r'
/* [+W<;iep
* (non-Javadoc) J[uH@3v
* N}#"o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7Q Ns q
*/ +3XaAk
public void sort(int[] data) { f>Ua7!b
int[] temp=new int[data.length]; P{%Urv{U
mergeSort(data,temp,0,data.length-1); ^^!G{*F
} H{i|?a)
=~W=}
private void mergeSort(int[] data, int[] temp, int l, int r) { M,kO7g
int i, j, k; $.w$x1
int mid = (l + r) / 2; Ja&S_'P[
if (l == r) &M3KJ I0L
return; yDZm)|<.
if ((mid - l) >= THRESHOLD) ,gG RCp
mergeSort(data, temp, l, mid); W?wt$'
else 8_Uhh5[
insertSort(data, l, mid - l + 1); m:0[as=
if ((r - mid) > THRESHOLD) 3'i(wI~<[
mergeSort(data, temp, mid + 1, r); %LmsywPPp
else =6 zK1Z
insertSort(data, mid + 1, r - mid); FVL{KNW~i
E8nj_^Z
for (i = l; i <= mid; i++) { x3U>5F@
temp = data; :/$_eg0A
} <ty]z!B
for (j = 1; j <= r - mid; j++) { L[nDjQn"
temp[r - j + 1] = data[j + mid]; {' 0#<Z
} ?VRsgV'$
int a = temp[l]; `J03t\
int b = temp[r]; nq>F_h
for (i = l, j = r, k = l; k <= r; k++) { u&TXN;I,p
if (a < b) { t54?<-
data[k] = temp[i++]; bd%< Jg+
a = temp; I7=A!C"
} else { @VG@|BQWa
data[k] = temp[j--]; E>5p7=Or;"
b = temp[j]; |dqESl,2
} [S~Bt78d%r
} [N9yWuc
} zv/dj04>
[~\]<;;\
/** IqepR >5t
* @param data f2M*]{N
* @param l *2vp2xMA@
* @param i ~G=E Q]a
*/ v)gMNzt
private void insertSort(int[] data, int start, int len) { @K*W3&TO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B@dCCKc%/
} ^"=G=* /
} 9v-Y*\!w.
} /~;!Ew|q
} kkb+qo
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堆排序： O(=9&PRi
o_k)x3I?
package org.rut.util.algorithm.support; r1vS~ 4Z
|nLq4.
import org.rut.util.algorithm.SortUtil; p"jze3mF
r7?nHF
/** o37oRv]
* @author treeroot Pn.DeoHme
* @since 2006-2-2 {=Jo!t;f
* @version 1.0 coPdyw'9&
*/ f##/-NG
public class HeapSort implements SortUtil.Sort{ H%rNQxA2 +
:X-S&SX0
/* (non-Javadoc) XSK<hr0m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T2azHo7
*/ ~&MDfpl
public void sort(int[] data) { 1t^9.!$@y
MaxHeap h=new MaxHeap(); 4J(-~
h.init(data); Q/4ICgo4
for(int i=0;i h.remove(); &)||~
System.arraycopy(h.queue,1,data,0,data.length); cbm;45 L|
} oUN\tOiS+
puWMgvv
private static class MaxHeap{ ~Sm6{L
V'Kied+
void init(int[] data){ \.H9e/vU`
this.queue=new int[data.length+1]; fXl2i]L(^B
for(int i=0;i queue[++size]=data; j} ^3v #
fixUp(size); h2Th)&Fb>
} $)9|"q6
} SVn@q|N
tH *|
private int size=0; #wRhR>6
_TsN%)m
private int[] queue; 1t?OD_d!8
A9K$:mL<2
public int get() { ]a~sJz!
return queue[1]; n@;B_Bt7
} E7@Gpu,o
~UO}PI`C
public void remove() { :@-yK8q's
SortUtil.swap(queue,1,size--); !P^Mo> "
fixDown(1); uG6.(A1LM
} +5Dc5Bl
file://fixdown Y0EX{oxt1
private void fixDown(int k) { aL+>XN
int j; 5*YvgB;
while ((j = k << 1) <= size) { EleJ$ `/
if (j < size %26amp;%26amp; queue[j] j++; M | "'`zc
if (queue[k]>queue[j]) file://不用交换 q6nRk~
break; 1%N*GJlwJ
SortUtil.swap(queue,j,k); 'OP0#`6`
k = j; 4Nt4(3Kf
} V!^0E.?a
} ."B{U_P&
private void fixUp(int k) { SN L-6]j
while (k > 1) { 2; ,8 u
int j = k >> 1; `#`jU"T|
if (queue[j]>queue[k]) X~"p]V_
break; c6c@XdV
SortUtil.swap(queue,j,k); o}/|"(K
k = j; Ma$~B0!;s
} &V<f;PF(I
} qT5"r488
L)F4)VL
} H2#o X
9Scg:}Nj
} KZZY9
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SortUtil： vBF9!6X.
URbB2 Bi
package org.rut.util.algorithm; qA`@~\qh"
`t)9u^[<(
import org.rut.util.algorithm.support.BubbleSort; y'4Qt.1ukN
import org.rut.util.algorithm.support.HeapSort; Q/0gd? U?
import org.rut.util.algorithm.support.ImprovedMergeSort; nC%qdzT
import org.rut.util.algorithm.support.ImprovedQuickSort; C<(oaeQY
import org.rut.util.algorithm.support.InsertSort; Fih pp<
import org.rut.util.algorithm.support.MergeSort; Ow4(1eE_
import org.rut.util.algorithm.support.QuickSort; Gvh"3|u?z
import org.rut.util.algorithm.support.SelectionSort; 4E=v)C'
import org.rut.util.algorithm.support.ShellSort; W9tZX5V1
$S?gQN.e
/** L_vl%ii-
* @author treeroot m=^]93+
* @since 2006-2-2 a <?~1pWtc
* @version 1.0 vFntzN>#
*/ a oU"
public class SortUtil { ^4"AWps
public final static int INSERT = 1; 457{9k
public final static int BUBBLE = 2; E/%"%&`8j
public final static int SELECTION = 3; `=#jWZ.8m
public final static int SHELL = 4; kV?fie<\)
public final static int QUICK = 5; Bz-jy.
public final static int IMPROVED_QUICK = 6; ^w~B]*A:"
public final static int MERGE = 7; H~Vf;k>
public final static int IMPROVED_MERGE = 8; 6V JudNA
public final static int HEAP = 9; $'Mf$h
;2&"
public static void sort(int[] data) { breF,d$
sort(data, IMPROVED_QUICK); LAf#Rco4
} t&{;6MiE
private static String[] name={ \-;f<%+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GVnDN~[
}; 3lpxh_
0`c{9gY.
private static Sort[] impl=new Sort[]{ x@rQ7K>
new InsertSort(), , %z HykP
new BubbleSort(), sV%DX5@
new SelectionSort(), lm;hW&O9
new ShellSort(), a0sz$u
new QuickSort(), !aF~5P7%
new ImprovedQuickSort(), ' :B;!3a0d
new MergeSort(), -~~h1
new ImprovedMergeSort(), +@3+WD
new HeapSort() MU a[}?
}; b1 w@toc
.aY$-Y<
public static String toString(int algorithm){ !KK`+ 9/
return name[algorithm-1]; Y 2ANt w@
} I)FFh%m<}a
/^nIOAeE
public static void sort(int[] data, int algorithm) { OR~ui[w
impl[algorithm-1].sort(data); fy"}# 2
} C){Q;`M-<
Sf*v#?
public static interface Sort { H2R3I<j
public void sort(int[] data); \'j(@b,
} S5TVfV5LI
? F #&F
public static void swap(int[] data, int i, int j) { <YFDS;b|
int temp = data; U0j>u*yE
data = data[j]; NC-K`)
data[j] = temp; _`\!+qGq
} YWH>tt9
} H"AL@=