[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; fZM)>
} |l5ol@2*
int i1=l; # `}(x;ge
int i2=mid+1; !brXQj8D7
for(int cur=l;cur<=r;cur++){ H(}Jt!/:
if(i1==mid+1) QoagyL
data[cur]=temp[i2++]; ?LE\pk R
else if(i2>r) %6-5hBzZN
data[cur]=temp[i1++]; b5r.N1ms
else if(temp[i1] data[cur]=temp[i1++]; %"#%/>U4
else 5\hJ&
data[cur]=temp[i2++]; JIeKp7;^
} >,JLYz|</
} xqV>m
C*O648yz[
} HR0t[*
!YJfP@"e6r
改进后的归并排序: =*K~U# uoC
|^z?(?w
package org.rut.util.algorithm.support; <G d?,}\
WO=X*One
import org.rut.util.algorithm.SortUtil; VKzY6
z D&5R/I
/** d1&RK2
* @author treeroot <A%}
* @since 2006-2-2 v]`}T/n
* @version 1.0 fb8"hO]s
*/ P3[!-sv
public class ImprovedMergeSort implements SortUtil.Sort { \_H-TbU8
Z' cQ< f
private static final int THRESHOLD = 10; Ml)0z&jQX
rLt`=bl&&U
/* Q<TD5t9
* (non-Javadoc) )`Zj:^bz9
* /$]#L%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GtYtB2U
*/ *RM?SE6;
public void sort(int[] data) { zGm#erE
int[] temp=new int[data.length]; y,I?3p|S
mergeSort(data,temp,0,data.length-1); HH_w!_f
} jlhyn0
z^tws*u],5
private void mergeSort(int[] data, int[] temp, int l, int r) { HiTn5XNf
int i, j, k; l)JNNcej
int mid = (l + r) / 2; |~QHCg<
if (l == r) wI\ n%#
return; /^#8z(@B
if ((mid - l) >= THRESHOLD) #2N']VP
mergeSort(data, temp, l, mid); %}t<,ex(yO
else >]6inS9
insertSort(data, l, mid - l + 1); f 7g?{M
if ((r - mid) > THRESHOLD) u!NY@$Wc
mergeSort(data, temp, mid + 1, r); mkJC*45
else *3,GQ%~/z
insertSort(data, mid + 1, r - mid); J;?#Zt]`L
ROWb:tX}
for (i = l; i <= mid; i++) { "rV-D1Dki
temp = data; LyEM^d]
} jzRfD3_s
for (j = 1; j <= r - mid; j++) { UIhU[f]
temp[r - j + 1] = data[j + mid]; C26vH#C
} +/">]QJ
int a = temp[l]; Z/y&;N4
int b = temp[r]; (}$pf6s
for (i = l, j = r, k = l; k <= r; k++) { m@|0iDS
if (a < b) { *$
data[k] = temp[i++]; ^lF'KW$
a = temp; fjc8@S5x9j
} else { s~A#B)wB
data[k] = temp[j--]; HnDz4eD
b = temp[j]; (MI8Kkb1d
} FXpI-?#E<
} L4fM?{Ic:s
} 5PaOa8=2f
MfX1&/Z+
/** m :6.
* @param data JG]67v{F
* @param l ,BUDo9h
* @param i k0%*{IVPN
*/ `k^d)9
private void insertSort(int[] data, int start, int len) { Q]Kc<[E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J}$St|1y
} K?M{=$N
} 17-D\ +}
} C-vFl[@a0
} ("G _{tVU
byT@O:fL
堆排序： z0@{5e$#Y
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package org.rut.util.algorithm.support; ,Z2fVz~9
k&|#(1CFY
import org.rut.util.algorithm.SortUtil; GFq,Ca~
oxs0)B
/** K,ccM[hu|
* @author treeroot 8'niew 5d
* @since 2006-2-2 Ia>07av
* @version 1.0 b7thu5
*/ |OgtAI9
public class HeapSort implements SortUtil.Sort{ >I9w|zFA
EWcqMD]4u
/* (non-Javadoc) }bU1wIW9I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G*oqhep
*/ (%bqeI!ob
public void sort(int[] data) { )D_\~n/5
MaxHeap h=new MaxHeap(); 5:oteNc3
h.init(data); cph&\ V2jt
for(int i=0;i h.remove(); SFj:|S=v6j
System.arraycopy(h.queue,1,data,0,data.length); #@quuiYq
} w1#1s|
8ZnHp~
private static class MaxHeap{ nfL-E:n=
*OX;ZQg0
void init(int[] data){ "@P)
this.queue=new int[data.length+1]; m1d*Lt>F@
for(int i=0;i queue[++size]=data; Kd<c'!
fixUp(size); !CnkG<5z>
} 1FkS$ j8:
} e-4 Qw#cw
" R=,W{=
private int size=0; #it)
K!L0|WH%!
private int[] queue; ^lI>&I&1
}K rQPg
public int get() { ,Q7W))j
return queue[1]; 5a0&LNm
} KOYU'hw
p3Ey[kURp
public void remove() { aMLtZ7i>
SortUtil.swap(queue,1,size--); 8p91ni'
fixDown(1); <Qx]"ZP%
} 2^V/>|W>w
file://fixdown I(bxCiRV
private void fixDown(int k) { `vMrlKq
int j; _?aI/D
while ((j = k << 1) <= size) { u{Rgk:bn
if (j < size %26amp;%26amp; queue[j] j++; .%\lYk]
if (queue[k]>queue[j]) file://不用交换 rV5QKz6'
break; gwAZ2w
SortUtil.swap(queue,j,k); [M;B 9-2$
k = j; .huk>
} c9uln
} 9'{i |xG
private void fixUp(int k) { ZcP/rT3{^
while (k > 1) { D^!x@I~:
int j = k >> 1; *(w#*,lv
if (queue[j]>queue[k]) :!cNkJa
break; x_k@hGSC
SortUtil.swap(queue,j,k); hFLLg|@
k = j; /:BM]K
} q]^Q?r<g::
} V\2&?#GZ
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} UHaY|I${U
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} $K'A_G^
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SortUtil： %F.^cd"
I<&(Dg|XQ
package org.rut.util.algorithm; JKJ+RkXf3
]"T1clZKd(
import org.rut.util.algorithm.support.BubbleSort; u A=x~-I
import org.rut.util.algorithm.support.HeapSort; V 5
import org.rut.util.algorithm.support.ImprovedMergeSort; K+F]a]kld
import org.rut.util.algorithm.support.ImprovedQuickSort; ywCF{rRd
import org.rut.util.algorithm.support.InsertSort; r ?e''r
import org.rut.util.algorithm.support.MergeSort; 9_/dj"5
import org.rut.util.algorithm.support.QuickSort; IW~q,X+`V
import org.rut.util.algorithm.support.SelectionSort; UpoTXAD}k
import org.rut.util.algorithm.support.ShellSort; a6/$}lCq
v"~0 3-SX
/** Y6R+i0guz
* @author treeroot =Felo8+
* @since 2006-2-2 iN]#XIQ%
* @version 1.0 .!><qVg
*/ IT5a/;J
public class SortUtil { =D}]|ie
public final static int INSERT = 1; (&=gM
public final static int BUBBLE = 2; w~lxWgaY7
public final static int SELECTION = 3; aR@s. ll
public final static int SHELL = 4; o;^k"bo6
public final static int QUICK = 5; wq6.:8Or-]
public final static int IMPROVED_QUICK = 6; [<!4 a
public final static int MERGE = 7; XW2{I.:in>
public final static int IMPROVED_MERGE = 8; Dau'VtzN
public final static int HEAP = 9; `yXJaTbo
J;mvD^`g
public static void sort(int[] data) { j_#oP
sort(data, IMPROVED_QUICK); xBevf&tP
} /z(;1$Ld6{
private static String[] name={ j3kcNb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4w)aAXK
}; Q!&@aKl
$,&3:ke1
private static Sort[] impl=new Sort[]{ nN|1cJ'.Fk
new InsertSort(), `{ 6K~(
new BubbleSort(), jeLC)lQ*
new SelectionSort(), {YT@$K]w,
new ShellSort(), 'UN 'gXny
new QuickSort(), 08pG)_L
new ImprovedQuickSort(), ?A\[EI^
new MergeSort(), X1J'
new ImprovedMergeSort(), |."thTO
new HeapSort() Obl,Qa:5
}; 5Y}=,v*h}
ZR"BxE0_k
public static String toString(int algorithm){ _(&XqEX
return name[algorithm-1]; :Dn{
} Pd^v-}[
$SAk|
public static void sort(int[] data, int algorithm) { Y{v\m(D
impl[algorithm-1].sort(data); ~6HaZlBB
} to%n2^^K
y G{;kJ P
public static interface Sort { q n2X._`
public void sort(int[] data); ^CtA@4
} 6%8,OOS
`&rt>Bk /
public static void swap(int[] data, int i, int j) { J-3%.fX,
int temp = data; )c"m:3D@
data = data[j]; 1TIP23:
data[j] = temp; d#OE) ,`
} d_r1}+ao
} ,FP<# 0F*a