[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; lU`t~|>r+
} ,M :j5
int i1=l; <&HHo>rl
int i2=mid+1; ]+>Kl>@
for(int cur=l;cur<=r;cur++){ 0CI\Yd=
if(i1==mid+1) xu@xP5GB^
data[cur]=temp[i2++]; WA5.qw
else if(i2>r) #-l+cu{
data[cur]=temp[i1++]; =[0|qGzg
else if(temp[i1] data[cur]=temp[i1++]; #;h> x
else ]2_=(N\Kt
data[cur]=temp[i2++]; Q)5V3Q]@^
} TXqtE("BDl
} !E^\)=E)P
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} ycf)*0k
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改进后的归并排序: P.djR)YI
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package org.rut.util.algorithm.support; | NyANsI
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import org.rut.util.algorithm.SortUtil; '@1C$0tx
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/** 34L1Gxf
* @author treeroot .]N`]3$=
* @since 2006-2-2 "O_)~u
* @version 1.0 0iKAg
*/ 3~Ll<8fv
public class ImprovedMergeSort implements SortUtil.Sort { \T?6TDZ]
l!:L<B
private static final int THRESHOLD = 10; H>%L@Btw
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/* 'Jd*r(2d
* (non-Javadoc) kpMo7n
* .u]d5z BR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v=DC3oh-
*/ u R]8ZT")
public void sort(int[] data) { P!lfk:M^;
int[] temp=new int[data.length]; T>,[V:
mergeSort(data,temp,0,data.length-1); S$46YQ
} V/RV,K1/
9}+X#ma.Nc
private void mergeSort(int[] data, int[] temp, int l, int r) { 27MwZz
int i, j, k; bnH:|-?q
int mid = (l + r) / 2; |<%v`*
if (l == r) }taG/kE62
return; 7@&kPh}PG
if ((mid - l) >= THRESHOLD) ^_BjO(b'e
mergeSort(data, temp, l, mid); A>)Ced!
else RQ4+EW1G
insertSort(data, l, mid - l + 1); 8YQ7XB
if ((r - mid) > THRESHOLD) `chD*@76I
mergeSort(data, temp, mid + 1, r); =&m;5R
else [EK@f,iM
insertSort(data, mid + 1, r - mid); ER;\Aes*?
@Thrizh
for (i = l; i <= mid; i++) { Q'YakEv >=
temp = data; hfg ^z5
} u5Mg
for (j = 1; j <= r - mid; j++) { uvi&! )x
temp[r - j + 1] = data[j + mid]; T/:6Z
} H(Y1%@
int a = temp[l]; T=CJUla
int b = temp[r]; %eGI]!vf
for (i = l, j = r, k = l; k <= r; k++) { ?U =Mdw
if (a < b) { >?.jN|
data[k] = temp[i++]; Lz!H@)-mr
a = temp; h+Y>\Cxg
} else { 2SlI5+u
data[k] = temp[j--]; N$u: !
b = temp[j]; 1?G%&X@ X
} MjK<n[.
} 4~2 9,
} t_+owiF)M
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/** &ViK9
* @param data fZQ2<*)pqO
* @param l Z6&bUZF$bE
* @param i cH707?p/I
*/ O^_CqT%
private void insertSort(int[] data, int start, int len) { j}w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^FZ9q
} +^%)QH>9
} KL"_h`UW
} 6q,CEm
} (px3o'lsh
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堆排序： OHv9|&Tpl
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package org.rut.util.algorithm.support; %g69kizoWi
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import org.rut.util.algorithm.SortUtil; ]$Q@4=fb
@X P_~ N
/** I:1Pz|$`
* @author treeroot xpI8QV$#
* @since 2006-2-2 qHPinxewx
* @version 1.0 (3=bKcD'
*/ y( UWh4?t
public class HeapSort implements SortUtil.Sort{ E:[!)UG|y
!e+Sa{X
/* (non-Javadoc) M~)iiKw~MY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W{1l?Wo
*/ 7| `_5e
public void sort(int[] data) { +-rSO"nc
MaxHeap h=new MaxHeap(); V0n8fez b
h.init(data); $QwzL/a
for(int i=0;i h.remove(); O2xqNQ`d
System.arraycopy(h.queue,1,data,0,data.length); ;u<F,o(
} Swgvj(y;!A
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private static class MaxHeap{ ]#7baZ
w:](F^<s,
void init(int[] data){ v~0lZe
this.queue=new int[data.length+1]; 5@n|uJA
for(int i=0;i queue[++size]=data; Q8_5g$X\
fixUp(size); u++a0>N
} #A:^XAU1Z@
} F4:5 >*:
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private int size=0; "B9zQ,[Q
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private int[] queue; OaY]}4tI$
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public int get() { Jg$ NYs.xZ
return queue[1]; TN/&^/
} /K;AbE
M&e=LV
public void remove() { 21] K7
SortUtil.swap(queue,1,size--); i%MR<M
fixDown(1); DmZ_tuVI
} lq?N>~PG
file://fixdown J ayax]u7J
private void fixDown(int k) { :u2tu60&MJ
int j; [a.(0YLr'w
while ((j = k << 1) <= size) { YVk +zt~S
if (j < size %26amp;%26amp; queue[j] j++; sosIu
if (queue[k]>queue[j]) file://不用交换 .!'rI7Kz'i
break; Kr`.q:0GK
SortUtil.swap(queue,j,k); ca[*#xiJ
k = j; VeH%E.:
} .5tXwxad"
} W k"_lJ
private void fixUp(int k) { |aj]]l[@S
while (k > 1) { H~:g=Zw
int j = k >> 1; V'9OGn2v
if (queue[j]>queue[k]) j`_Z`eG
break; e.(RhajB
SortUtil.swap(queue,j,k); ~8'HX*B]z
k = j; |1Nz8Vr.
} ^5+7D1>W%
} iphdJZ/f
%v^qQWy=*
} k"cKxzB
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} Y"dTm;&
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SortUtil： hJX;/~L
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package org.rut.util.algorithm; 9gZS)MZ
!_?HSDAj"n
import org.rut.util.algorithm.support.BubbleSort; X*e:MRw[
import org.rut.util.algorithm.support.HeapSort; ) urUaE
import org.rut.util.algorithm.support.ImprovedMergeSort; :]* =f].
import org.rut.util.algorithm.support.ImprovedQuickSort; o+\?E.%%g
import org.rut.util.algorithm.support.InsertSort; 9~ifST\
import org.rut.util.algorithm.support.MergeSort; W7 +Q&4Y
import org.rut.util.algorithm.support.QuickSort; Z#K0a'
import org.rut.util.algorithm.support.SelectionSort; Mi`t$hmP
import org.rut.util.algorithm.support.ShellSort; _HAr0R8BY
ke'OT>8
/** g}vU*g ;
* @author treeroot wD@ wOC
* @since 2006-2-2 $:?=A5ttuo
* @version 1.0 %F<3_#Y
*/ t'C9;
public class SortUtil { N9z!-y'X
public final static int INSERT = 1; K81&BVx/
public final static int BUBBLE = 2; + Cq&~<B
public final static int SELECTION = 3; eqpnh^0}d
public final static int SHELL = 4; l%`~aVGJ
public final static int QUICK = 5; |~=4ZrcCP
public final static int IMPROVED_QUICK = 6; UQtG<W]<
public final static int MERGE = 7; d"+ _`d=`
public final static int IMPROVED_MERGE = 8; vY,]f^F"
public final static int HEAP = 9; Tn$| Xa+:s
NE Z ]%
public static void sort(int[] data) { k7z{q/]M
sort(data, IMPROVED_QUICK); 4Q\~l(
} n>%TIoY
private static String[] name={ eT8h:+k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,qhv(
}; 24Htr/lPCT
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private static Sort[] impl=new Sort[]{ _3gF~qr
new InsertSort(), dW#l3_'3T
new BubbleSort(), @Tsdgx8
new SelectionSort(), tgu fU
new ShellSort(), EtcXzq>w
new QuickSort(), %5<t3H"
new ImprovedQuickSort(), ?QzN\fY;
new MergeSort(), ~ o5h}OU"
new ImprovedMergeSort(), `]<~lf
new HeapSort() E8We2T[^M
}; |U="B4
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public static String toString(int algorithm){ q -^Z=,<
return name[algorithm-1]; }5"19 Go?
} T9gQq 7(l
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public static void sort(int[] data, int algorithm) { m RtE~~p
impl[algorithm-1].sort(data); 8SMa5a{
} oc&yz>%q
@wXo{p@W
public static interface Sort { ?^: xNRE$j
public void sort(int[] data); `ln=D$
} pB,@<\l %
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public static void swap(int[] data, int i, int j) { }5ONDg(I~
int temp = data; N_E:?Jo
data = data[j]; {7FD-Q[tS
data[j] = temp; ~Q1%DV.
} Pe7% 9
} q.RW_t~