[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; i>Fvmw
} v0Ai!#
int i1=l; ^IVe[P'
int i2=mid+1; JYwyR++uo
for(int cur=l;cur<=r;cur++){ kYxl1nv
if(i1==mid+1) @GG(7r\/B
data[cur]=temp[i2++]; os1?6z~
else if(i2>r) zUs~V`0
data[cur]=temp[i1++]; !.3R~0b
else if(temp[i1] data[cur]=temp[i1++]; l801`~*gO
else nw0L1TP/J
data[cur]=temp[i2++]; U~*c#U"bh
} ]^:hyOK
} ,{?q^"
kG)2%
} T~%H%O(F
WHUT/:?f
改进后的归并排序: J;UBnCg
L`UG=7r q
package org.rut.util.algorithm.support; [IX*sr
{)V?R
import org.rut.util.algorithm.SortUtil; 2yln7[a
K8 b+
/** OE'K5oIM
* @author treeroot )?w&oIj5
* @since 2006-2-2 I?a8h`WS+
* @version 1.0 -B1YZ/.rz"
*/ U_}7d"<| ?
public class ImprovedMergeSort implements SortUtil.Sort { ?fK^&6pI
)Fqy%uR8
private static final int THRESHOLD = 10; e,f ;
5-D`<\
/* |l|_dn
* (non-Javadoc) =-$!:W~
* Z-)[1+Hs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! FNf>z+
*/ gbm0H-A:*
public void sort(int[] data) { |9>*$Fe"
int[] temp=new int[data.length]; V: ^JC>6
mergeSort(data,temp,0,data.length-1); j$@?62)6
} 6*ZU}xT
[6D>f?z
private void mergeSort(int[] data, int[] temp, int l, int r) { U~aWG\h#X
int i, j, k; S|"Fgoj r
int mid = (l + r) / 2; AG]WO8f)
if (l == r) XQ]`&w(
return; [2Iau1<@
if ((mid - l) >= THRESHOLD) C"w,('~@kW
mergeSort(data, temp, l, mid); 6Wj@r!u
else AD^X(rW
insertSort(data, l, mid - l + 1); I-xwJi9?,
if ((r - mid) > THRESHOLD) ||uZ bP@
mergeSort(data, temp, mid + 1, r); d,W/M(S
else jFtg.SD
insertSort(data, mid + 1, r - mid); hwiKOP
%drJ p6n%
for (i = l; i <= mid; i++) { jOs H2^
temp = data; U.: sK*
} Bn\l'T
for (j = 1; j <= r - mid; j++) { $^t<9"t
temp[r - j + 1] = data[j + mid]; 8QV t, 'I
} )8;{nqoC
int a = temp[l]; p ZtgIS(3
int b = temp[r]; <}d/v_+pnh
for (i = l, j = r, k = l; k <= r; k++) { EYG"49 c
if (a < b) { /I`3dWL
data[k] = temp[i++]; Vu}806kB
a = temp; OR]T`meO
} else { A8J8u,u9
data[k] = temp[j--]; UxyY<H~Wx
b = temp[j]; [FGgkd}
} qNpu}\L
} h1#S+k
} !Cw!+fZ\l
L[rpb.'FG
/** 8Jr1_a
* @param data r*chL&7
* @param l R2l[Q){!
* @param i "%VbI P
*/ /|?F)%v\
private void insertSort(int[] data, int start, int len) { 6*Zj]is
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q/$GE,"
} d/S+(<g
} tw=K&/@^O
} 22>;vM."
} 8W;2oQN7
>V(zJ
堆排序： L1wZU,o
2JVxzj<~`
package org.rut.util.algorithm.support; bp#fyG"
-ui<E?v
import org.rut.util.algorithm.SortUtil; lV\lj@
g5y;?fqJ
/** M ?*Tf&
* @author treeroot {b1UX9y
* @since 2006-2-2 ~Q?!W0ZBE
* @version 1.0 FPF6H puV
*/ 4}i*cB`
public class HeapSort implements SortUtil.Sort{ Y9u;H^^G
Ea4_Qmn
/* (non-Javadoc) cx{T '1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :6Pnie
*/ JS!*2*Wr
public void sort(int[] data) { !2$ z *C2;
MaxHeap h=new MaxHeap(); $o.Kn9\
h.init(data); /THnfy\
for(int i=0;i h.remove(); 9${Xer'
System.arraycopy(h.queue,1,data,0,data.length); z1vw'VT>
} *_1[[~Aw
03([@d6<E
private static class MaxHeap{ DI,K(_@G
A2NF<ZsD
void init(int[] data){ -f?Ah
this.queue=new int[data.length+1]; UQI f}iR
for(int i=0;i queue[++size]=data; ^ S
fixUp(size); \5TxE
} %v{1#~u
} 44HiTWQS?l
K"\MU
private int size=0; |CIC$2u
,gMy@
private int[] queue; xx }GOY.J
ybQP E/9
public int get() { f8'MP9Lv
return queue[1]; ]\Xc9N8w
} `ZMK9f:
9JnY$e<&
public void remove() { ]Bnwk o
SortUtil.swap(queue,1,size--); yfEb
fixDown(1); 3F+Jdr'
} Tfx :"u
file://fixdown .<#ATFmY
private void fixDown(int k) { j1q[c,
int j; `#Kx|x6
while ((j = k << 1) <= size) { inAAgW#s}
if (j < size %26amp;%26amp; queue[j] j++; c#lPc>0xb
if (queue[k]>queue[j]) file://不用交换 T5|c$doQ
break; oY=1C}
SortUtil.swap(queue,j,k); }gGkV]
k = j; e;VIL 2|
} r?A|d.Tl
} C5@V/vA
private void fixUp(int k) { `uo,__y
while (k > 1) { iev>9j
int j = k >> 1; tmJgm5v
if (queue[j]>queue[k]) T6M+|"92
break; {G3i0r
SortUtil.swap(queue,j,k); @hif$
k = j; V&ot3- Rf
} iiG f'@/
} yz\c5
.Cz %:%9
} + G;LX'B
;%!B[+ut"
} Y<f_`h^r
qAY%nA>jO
SortUtil： 2c(aO[%h9
G7@O`N8'
package org.rut.util.algorithm; h}L}[
P"3*lk+w
import org.rut.util.algorithm.support.BubbleSort; "D][e'
import org.rut.util.algorithm.support.HeapSort; /6+NU^
import org.rut.util.algorithm.support.ImprovedMergeSort; iv&v8;B
import org.rut.util.algorithm.support.ImprovedQuickSort; DmqSQA
import org.rut.util.algorithm.support.InsertSort; hs+kr?Pg`
import org.rut.util.algorithm.support.MergeSort; RJ4. kt
import org.rut.util.algorithm.support.QuickSort; ?okx<'"[
import org.rut.util.algorithm.support.SelectionSort; 4!#a3=_
import org.rut.util.algorithm.support.ShellSort; 'ZP)cI:+X
',I0ih#Ls
/** ~1kXUWq3
* @author treeroot 3c3OG.H$8
* @since 2006-2-2 xV\5<7qk5g
* @version 1.0 #1.YKo
*/ 7KjUW\mN2Z
public class SortUtil { !>z:m!MlQ
public final static int INSERT = 1; 'CR)`G_'[
public final static int BUBBLE = 2; j&R+2%
public final static int SELECTION = 3; hk>;pU(
public final static int SHELL = 4; )|bC^{kH!l
public final static int QUICK = 5; XORk!m|
public final static int IMPROVED_QUICK = 6; fJAnKUF)
public final static int MERGE = 7; :dI\z]Y(
public final static int IMPROVED_MERGE = 8; sEc;!L
public final static int HEAP = 9; YDC&u8
eH%RNtP`
public static void sort(int[] data) { <Fz~7WVd
sort(data, IMPROVED_QUICK); PVOx`<ng
} wzCUZ1N9q
private static String[] name={ h"+ `13
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xiblPF_n3
}; eqAW+Ptx
mLk(y*
private static Sort[] impl=new Sort[]{ BB$oq'
new InsertSort(), MrRaU x6z
new BubbleSort(), .;7> y7$*
new SelectionSort(), M~Ttb29{
new ShellSort(), a2 +~;{?g
new QuickSort(), O1&b]C#
new ImprovedQuickSort(), [K/m
new MergeSort(), lj=l4 &.i
new ImprovedMergeSort(), ZraT3
new HeapSort() hr05L<?H
}; GB7/x*u
N_pUv
public static String toString(int algorithm){ [U@;\V$
return name[algorithm-1]; \55VqGyxu9
} ?:{sH#ua
"es?=
public static void sort(int[] data, int algorithm) { cvd\/pG)
impl[algorithm-1].sort(data); 2i{cQ96
} Gq<X4C#|
M=qb^~ l
public static interface Sort { VZ& A%UFC
public void sort(int[] data); u+H; @
} wIB`%V
q$(5Vd:
public static void swap(int[] data, int i, int j) { C'yppl%
int temp = data; 5q9s,r_
data = data[j]; NEt1[2X%
data[j] = temp; )rW&c-'
} YKmsQ(q`N
} 7{@l%jx][