[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Ln,<|,fZN
} M,H8ZO:R
int i1=l; Ly2,*\7
int i2=mid+1; Y0,{fw<
for(int cur=l;cur<=r;cur++){ 3?FY?Q[
if(i1==mid+1) $mM"C+dD
data[cur]=temp[i2++]; x&;AY
else if(i2>r) #0<pRDXj
data[cur]=temp[i1++]; 2PSExK57
else if(temp[i1] data[cur]=temp[i1++]; j "<?9/r
else L1RD`qXu.
data[cur]=temp[i2++]; WS n>P7sY
} 1iz =i^}
} _9lMa7i
^\gb|LEnK
} Cu#n5SF*
?{TWsuP7
改进后的归并排序: Ro2V-6/
PM84Z@Y
package org.rut.util.algorithm.support; Jl\xE`-7
nzaDO-2!
import org.rut.util.algorithm.SortUtil; #VX]trh,
wd*B3
/** j67a?0<C2U
* @author treeroot 9y6u&!PZ\
* @since 2006-2-2 LD[\eJ_
* @version 1.0 _)5E=
*/ 45.ks.
public class ImprovedMergeSort implements SortUtil.Sort { )b1hF
d {U%q d
private static final int THRESHOLD = 10; S&UP;oc
R&W%E%uj
/* 5"nq h}5
* (non-Javadoc) vOlfyH>
* 4utwcXL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m=9b/Nr4
*/ RM_%u=jC
public void sort(int[] data) { *]yrN`
int[] temp=new int[data.length]; ?+hEs =Xs
mergeSort(data,temp,0,data.length-1); |k6+- 1~_
} Iz+%wAZ|B6
QY)p![6Fj
private void mergeSort(int[] data, int[] temp, int l, int r) { 'hr_g* i
int i, j, k; %^lD
int mid = (l + r) / 2; Gf.ywqE$Y$
if (l == r) L3I$ K+c
return; F*U(Wl=
if ((mid - l) >= THRESHOLD) }b54O\,
mergeSort(data, temp, l, mid); ~|=D.}#$
else Q9OCf"n$
insertSort(data, l, mid - l + 1); B`eK_'7t
if ((r - mid) > THRESHOLD) UeFJ5n'x:
mergeSort(data, temp, mid + 1, r); *RS/`a;,
else Fya*[)HBo
insertSort(data, mid + 1, r - mid); A;rk4)lij
Rf4K Rhi
for (i = l; i <= mid; i++) { Fvk=6$d2
temp = data; %|H]T]s
} }w4OCN\1
for (j = 1; j <= r - mid; j++) { )=GPhC/sw
temp[r - j + 1] = data[j + mid]; #^VZJ:2=|
} @*vVc`;
int a = temp[l]; zl8M<z1`1
int b = temp[r]; Ti)Me-g
for (i = l, j = r, k = l; k <= r; k++) { 5?H8?~&dz
if (a < b) { }6a}8EyFP
data[k] = temp[i++]; bEcN_7
a = temp; *ilh/Hd>
} else { )I*(yUj
data[k] = temp[j--]; Ld.9.d]
b = temp[j]; nQV0I"f]?]
} $#f_p-N
} 1#3|PA#>
} wyX3qH
w3q'n%
/** mTu>S
* @param data QErdjjgE
* @param l \9`E17i
* @param i V. i{IW
*/ &X:;B'
private void insertSort(int[] data, int start, int len) { =M-=94
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F&!vtlV)
} ]CLM'$
} toGd;2rl
} ?0:]%t18
} tx d0S!
Z#@
堆排序： Zfk]Z9YO
9Zd\6F,
package org.rut.util.algorithm.support; X7-*`NI^
A"pQOtrm\k
import org.rut.util.algorithm.SortUtil; _Vp"G)1Y
*y?6m,38V
/** 0^S$_L
* @author treeroot AHn!>w,
* @since 2006-2-2 (y; 6H
* @version 1.0 stK}K-=`
*/ 0'6ai=W
public class HeapSort implements SortUtil.Sort{ v@QnS
9NwUXh(:(
/* (non-Javadoc) bu6Sp3g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A{;"e^a-^l
*/ z<9C-
public void sort(int[] data) { *;}xg{@
MaxHeap h=new MaxHeap(); D*2*FDGI
h.init(data); s i2@k
for(int i=0;i h.remove(); J/P[9m30[
System.arraycopy(h.queue,1,data,0,data.length); "|I.j)
} $=diG
hO[_ _j8
private static class MaxHeap{ N{bg-%s10i
KE"6I
void init(int[] data){ Hre&a!U
this.queue=new int[data.length+1]; <o|fH~?X
for(int i=0;i queue[++size]=data; c6 &k?Puy
fixUp(size); <vWP_yy
} v3cMPN
} b||usv[or
J:W+'x`@
private int size=0; n[e C
ynM:]*~K
private int[] queue; ./;uhj
94&t0j_
public int get() { W8bp3JX"
return queue[1]; F8<G9#%s\
} ByP<-Deh
!0hyp |F:>
public void remove() { \E,2VM@6
SortUtil.swap(queue,1,size--); ?=4oxPe
fixDown(1); =YVxQj
} ]wDqdD y7S
file://fixdown RuYIG?J=/
private void fixDown(int k) { ,gNZHKNq
int j; u-&V, *3l
while ((j = k << 1) <= size) { Kkovp^G
if (j < size %26amp;%26amp; queue[j] j++; aHu0z:
if (queue[k]>queue[j]) file://不用交换 ^_3Ey
break; v`QDms,{
SortUtil.swap(queue,j,k); x[};x;[ZE
k = j; 4+>yL+sC%v
} bP-(N14x+
} uQH]
private void fixUp(int k) { 0J/yd
while (k > 1) { V0{#q/q
int j = k >> 1; +`wr{kB$~
if (queue[j]>queue[k]) )/DN>rU
break; k0=!%f_G!
SortUtil.swap(queue,j,k); WqefH{PB
k = j; +o4o!;E)
} Wjq9f;
} !m:WoQ/
#!z-)[S.+
} e0y.J
Hy:x.'i
} cO{NiRIb
FVl, ttW
SortUtil： %[KnpJ{\
nI?*[y}
package org.rut.util.algorithm; @d{}M)6\!
*LhwIY
import org.rut.util.algorithm.support.BubbleSort; Tv7W)?3h
import org.rut.util.algorithm.support.HeapSort; |DW^bv
import org.rut.util.algorithm.support.ImprovedMergeSort; BMO,eQcB
import org.rut.util.algorithm.support.ImprovedQuickSort; jt}oq%Bf
import org.rut.util.algorithm.support.InsertSort; @1'OuX^
import org.rut.util.algorithm.support.MergeSort; Z?xaXFm_
import org.rut.util.algorithm.support.QuickSort; _+P*XY5
import org.rut.util.algorithm.support.SelectionSort; 0 N7I:vJ
import org.rut.util.algorithm.support.ShellSort; p/_W*0/i
9;XbyA]
/** MVzj7~+
* @author treeroot p_BG#dRM
* @since 2006-2-2 ^PFiO 12
* @version 1.0 KB~1]cYMp
*/ ,d/$!Yf
public class SortUtil { {@L{l1|0
public final static int INSERT = 1; [dLc+h1{B
public final static int BUBBLE = 2; `:Wyw<^
public final static int SELECTION = 3; !NNPg?Y
public final static int SHELL = 4; z =H?@z
public final static int QUICK = 5; `f}ZAX
public final static int IMPROVED_QUICK = 6; !-T#dU
public final static int MERGE = 7; 8*&-u +@%
public final static int IMPROVED_MERGE = 8; B/3~[ '
public final static int HEAP = 9; }N-UlL(
XelFGTE
public static void sort(int[] data) { W20- oZ8
sort(data, IMPROVED_QUICK); +&"W:Le:
} A4l"^dZc
private static String[] name={ hoBFC1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wT+60X'
}; FEhBhv|m
l2W+VBn6
private static Sort[] impl=new Sort[]{ }` `oojz
new InsertSort(), PT,*KYF_O"
new BubbleSort(), ,e$RvFB
new SelectionSort(), <hy!B4
new ShellSort(), 8bMw.u=F
new QuickSort(), m8L %!6o
new ImprovedQuickSort(), \4$Nx/@Q}
new MergeSort(), ?~.9:93
new ImprovedMergeSort(), l]DRJ
new HeapSort() oIOeX1$V
}; B> i^w1
N%:uOX8{
public static String toString(int algorithm){ 7.NL>:lu
return name[algorithm-1]; kKbbsB
} H4v%$R;K
`4@`G:6BL
public static void sort(int[] data, int algorithm) { :,H_ e! X
impl[algorithm-1].sort(data); .Sw4{m[g
} </<z7V,{
n@@tO#!\
public static interface Sort { NY?iuWa*g
public void sort(int[] data); /Tl ybSC1
} )N{PWSPs
8z=o.\@
public static void swap(int[] data, int i, int j) { |#*+#27
int temp = data; 2\$<&]q
data = data[j]; `$ bQ8$+Ci
data[j] = temp; Jp)PKS ![
} nC/T$ #G
} \K9Y@jnr