[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; w\RYxu?
} P=aYwmC
int i1=l; 25j?0P"&
int i2=mid+1; d%K&
for(int cur=l;cur<=r;cur++){ VXnWY8\
if(i1==mid+1) D}`MY\H
data[cur]=temp[i2++]; t2Px?S?
else if(i2>r) t$3B#=
data[cur]=temp[i1++]; wBJ|%mc3TA
else if(temp[i1] data[cur]=temp[i1++]; R"yxpw
else \fsNI T/
data[cur]=temp[i2++]; rvacCwI
} P(UY}oU
} ;\(LovUy6
CofTTYl
} lA`qB1x
d`,z4_
改进后的归并排序: l{gR6U{e
i#aKW'
package org.rut.util.algorithm.support; o)GesgxFa5
#w@FBFr@
import org.rut.util.algorithm.SortUtil; 6:q,JB@i
YwS/O N
/** &Oc `|r*
* @author treeroot HB,?}S#TP
* @since 2006-2-2 h$XoR0
* @version 1.0 `-.6;T}2U
*/ "g*`G<W_s
public class ImprovedMergeSort implements SortUtil.Sort { K 6yD64
yIC C8M
private static final int THRESHOLD = 10; I Z|EPzS
<KJ|U0/jGd
/* `oTV)J'~
* (non-Javadoc) CTe!jMZ=
* }qJ`nN8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e8E'X
*/ XmaRg{22
public void sort(int[] data) { S5:&_&R8[
int[] temp=new int[data.length]; 8>9MeDE
mergeSort(data,temp,0,data.length-1); I/%L,XyRI
} 29l bOi
=te4p@
private void mergeSort(int[] data, int[] temp, int l, int r) { di(H-=9G62
int i, j, k; 9{}"tk5$h
int mid = (l + r) / 2; k8!:`jG
if (l == r) ,rjl|F* T
return; +,g!xv4Q
if ((mid - l) >= THRESHOLD) o@hj.)u
mergeSort(data, temp, l, mid); l<qEX O
else njaKU?6%d2
insertSort(data, l, mid - l + 1); *+k yuY J
if ((r - mid) > THRESHOLD) l_4^TYF
mergeSort(data, temp, mid + 1, r); jZQ{XMF
else P'o]#Az
insertSort(data, mid + 1, r - mid); ^ p7z3ng
A9KPU:
for (i = l; i <= mid; i++) { Kf6D)B 26
temp = data; )W6l/
} E`.:V<KW/
for (j = 1; j <= r - mid; j++) { K"[\)&WBG
temp[r - j + 1] = data[j + mid]; P @J)S ?
} ~xv3R
int a = temp[l]; K%W;-W*'
int b = temp[r]; zf]e"e
for (i = l, j = r, k = l; k <= r; k++) { OnU-FX<
if (a < b) { 'BUfdb8d
data[k] = temp[i++]; &'`ki0Xh;
a = temp; F vTswM>
} else { WFzM s
data[k] = temp[j--]; q{%~(A5*H
b = temp[j]; )G;Hf?M
} Ly/
} #k1IrqUp
} @LFB}B
t&p I
/** XwfR/4
* @param data AyW=.
* @param l |26[=_[q
* @param i ;>/yY]F7
*/ XZS%az1%
private void insertSort(int[] data, int start, int len) { K2\)9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^(Z%,j3O
} vRn]u57O
} M]M>z>1*v
} y\4/M6
} 7SN61)[m
W9oWj7&h
堆排序： Sb?Ua*(L:
K'/if5>Bc
package org.rut.util.algorithm.support; +J~%z*A
GIT"J}b}
import org.rut.util.algorithm.SortUtil; HO_(it \
?Q$a@)x#
/** Q/]o'_[vW
* @author treeroot sxS%1hp3
* @since 2006-2-2 @4Zkkjc4b
* @version 1.0 Pd& Npp3
*/ R^=v&c{@
public class HeapSort implements SortUtil.Sort{ ay||yn:
hrO9_B|#
/* (non-Javadoc) {LVA_7@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {;th~[
*/ z,hBtq:-$
public void sort(int[] data) { ir>S\VT4
MaxHeap h=new MaxHeap(); \rATmjsKzS
h.init(data); Vrd16s
for(int i=0;i h.remove(); sP}u zS
System.arraycopy(h.queue,1,data,0,data.length); x%O6/rl
} ,L.V>Ae
_"OE}$C
private static class MaxHeap{ '/OQ[f=K
)Z|G6H`c3
void init(int[] data){ QN?EI: q=
this.queue=new int[data.length+1]; ^16zZ*
for(int i=0;i queue[++size]=data; R#.H&#
fixUp(size); e2K9CE.O
} &cd>.&1<2
} p@Cas
T$AVMVq
private int size=0; A0RSNAM
FzP1b_i
private int[] queue; 2`%a[t@M.
hg:$H9\%
public int get() { eX lJ=S}
return queue[1]; *W^a<Zm8>
} @$t\yBSK
GKOl{och
public void remove() { &r*F+gL
SortUtil.swap(queue,1,size--); G<$8g-O;D
fixDown(1); D%LYQ
} Sv0?_3C
file://fixdown Mu-kvgO`L
private void fixDown(int k) { Owgy<@C
int j; w El-
while ((j = k << 1) <= size) { CEBG9[|
if (j < size %26amp;%26amp; queue[j] j++; `m8WLj
if (queue[k]>queue[j]) file://不用交换 ?E(X>tH
break; !f&hVLs0
SortUtil.swap(queue,j,k); `u7^r^>A
k = j; RHpjJZUV
} $uJc/
} $duT'G, -
private void fixUp(int k) { .Pte}pM"v
while (k > 1) { g oyQ',+
int j = k >> 1; S("dU`T?
if (queue[j]>queue[k]) ~IWdFUKk
break; 'ey62-^r6
SortUtil.swap(queue,j,k); B"\9slX
k = j; "wg$ H1K
} AL^tUcl
} ggitUQ+t;G
H~mp*S
} Q$ Dx:
E/wxX#]\
} FC6~V6R
%;R&cSZ
SortUtil： V82I%gPF
R".$x{{
package org.rut.util.algorithm; dLF*'JjY
cDzb}W*UM
import org.rut.util.algorithm.support.BubbleSort; }<@-=
import org.rut.util.algorithm.support.HeapSort; 1-N+qNSD`
import org.rut.util.algorithm.support.ImprovedMergeSort; -:"KFc8A
import org.rut.util.algorithm.support.ImprovedQuickSort; EY3F9h3xM|
import org.rut.util.algorithm.support.InsertSort; 4\p%|G^hU
import org.rut.util.algorithm.support.MergeSort; mk^,{D
import org.rut.util.algorithm.support.QuickSort; dKC*QHU
import org.rut.util.algorithm.support.SelectionSort; tLN^k;w
import org.rut.util.algorithm.support.ShellSort; U<q`f-
;m>/tD%
/** wfEL .h
* @author treeroot ~e]B[>PT
* @since 2006-2-2 }&v-<qC^
* @version 1.0 HwZl"!;Mry
*/ &WL::gy_S
public class SortUtil { ^k$Bx_{
public final static int INSERT = 1; O6 s3#iu
public final static int BUBBLE = 2; b SgbvnJ
public final static int SELECTION = 3; ~k?wnw
public final static int SHELL = 4; /':64#'
public final static int QUICK = 5; /'E[03I~
public final static int IMPROVED_QUICK = 6; J~ome7L
public final static int MERGE = 7; {fHY[8su0
public final static int IMPROVED_MERGE = 8; )bL(\~0g~
public final static int HEAP = 9; /{jt]8/;7
yzT1Zg_ER
public static void sort(int[] data) { 2kDv (".
sort(data, IMPROVED_QUICK); -K(d]-yv
} Yb_HvP
private static String[] name={ D)DD6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S@S4<R1{\
}; ys>n%24qP
bKK'U4
private static Sort[] impl=new Sort[]{ /Z!$bD
new InsertSort(), 5/i/. 0?n
new BubbleSort(), 0bc>yZ\R
new SelectionSort(), ~Dz:n]Vk/
new ShellSort(), }o7-3!{L!
new QuickSort(), O"EL3$9V
new ImprovedQuickSort(), #1\`!7TO3
new MergeSort(), :4Nv6X61
new ImprovedMergeSort(), DTM(SN8R+n
new HeapSort() S9 $t9o
}; i>[xN[U(
M*D_pn&
public static String toString(int algorithm){ Tp{jR<
return name[algorithm-1]; 1#7|au%:)
} |4P8N{ L>O
rl~Rbi
public static void sort(int[] data, int algorithm) { ~TXu20c
impl[algorithm-1].sort(data); rtQ{
} b?Uk%Z]+v
u0sN[<
public static interface Sort { $gz8! f?
public void sort(int[] data); F?]J`F\I
} vE8'B^h1
2|i1}
public static void swap(int[] data, int i, int j) { UF6U5],`u
int temp = data; ~*y7%L4B
data = data[j]; pY3/AO=
data[j] = temp; .d[^&<^
} cJ@fJ|
} T,uF^%$@AQ