[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; '_Wt}{h
} hjY0w
int i1=l; 9G:TW|)L[Q
int i2=mid+1; Gj6. Iv
for(int cur=l;cur<=r;cur++){ H/i<_LP
if(i1==mid+1) }z'DWp=uN
data[cur]=temp[i2++]; .:0M+Jr"
else if(i2>r) r=csi
data[cur]=temp[i1++]; 2,AaP*,
else if(temp[i1] data[cur]=temp[i1++]; g37q/nEv
else N~g%wf@w
data[cur]=temp[i2++]; CX+9R3pa
} Dr'sIH^
} Ex,JB +
)Xno|$b5Eo
} ]V<"(?,K
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改进后的归并排序: ="lI i$>O
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package org.rut.util.algorithm.support; G.ud1,S#
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import org.rut.util.algorithm.SortUtil; 5^F]tRz-
]31$KBC
/** A9n41,h
* @author treeroot .YiaXP
* @since 2006-2-2 ('BLU.7IX
* @version 1.0 ;C_ >
*/ K`gc 4:A
public class ImprovedMergeSort implements SortUtil.Sort { %^')G+>i
('HxHOh2
private static final int THRESHOLD = 10; e?vj+ZlS$f
(fd[P|G_]
/* 7sguGwg)_
* (non-Javadoc) JX&~y.F
* sS'{QIRC'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fM9xy \.
*/ lbofF==(
public void sort(int[] data) { {r{>?)O
int[] temp=new int[data.length]; OequU'j
mergeSort(data,temp,0,data.length-1); +U=KXv
} . =R=cA7
0lf"w@/
private void mergeSort(int[] data, int[] temp, int l, int r) { :3gFHBFDj
int i, j, k; `OLB';D
int mid = (l + r) / 2; K /ZHJkJ7
if (l == r) 'v+96b/;
return; ebD{ pc`&
if ((mid - l) >= THRESHOLD) lux9o$ %
mergeSort(data, temp, l, mid); ]wR6bEm7
else mVHFT~x7}
insertSort(data, l, mid - l + 1); oo'iwq-\
if ((r - mid) > THRESHOLD) `{WCrw6)
mergeSort(data, temp, mid + 1, r); 5 Af?Yxv
else Ss+F9J
insertSort(data, mid + 1, r - mid); sHF%=Vu
XC2Q*Z
for (i = l; i <= mid; i++) { H<{*ub4'L*
temp = data; lkyJ;}_**
} }R\B.2#M_@
for (j = 1; j <= r - mid; j++) { >LCjtm\
temp[r - j + 1] = data[j + mid]; /:^tc/5U]
} DSTx#*
int a = temp[l]; |:}L<9Sq
int b = temp[r]; 'oT|cmlc
for (i = l, j = r, k = l; k <= r; k++) { i'9eKO
if (a < b) { WE7>?H*Ro
data[k] = temp[i++]; sgR 9d
a = temp; KM EXT$p
} else { `yy%<&
data[k] = temp[j--]; %jpH:-8'2
b = temp[j]; 8 `yB
} ;A`IYRzt
} D_zcOq9
} 5BZ+b_A>VV
T$f:[ye]Z
/** wbo{JQ
* @param data 5X#i65_-
* @param l aS2a_!f
* @param i ]Pz|Oi+]
*/ wrhBH;3
private void insertSort(int[] data, int start, int len) { ^V_ku@DY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "Wxo[I
} ZE{aS4c
} $gXkx D
} +!D=SnBGs
} U;^CU!a
uv?8V@x2
堆排序： xn0s`I[
' }y]mFpF
package org.rut.util.algorithm.support; SjFF=ib
= E##},N"
import org.rut.util.algorithm.SortUtil; &Xj{:s#
eV@4VxaZ
/** W9:fKP
* @author treeroot Cb4d|yiS8
* @since 2006-2-2 yd\5Z[iEp
* @version 1.0 (jD'+ "?
*/ V.O<|tl.
public class HeapSort implements SortUtil.Sort{ N[- %0
0[_O+u
/* (non-Javadoc) HQ ELK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m~A[V,os
*/ WsG"x>1n
public void sort(int[] data) { tg4LE?nv
MaxHeap h=new MaxHeap(); fU\k?'x_
h.init(data); we6+2
for(int i=0;i h.remove(); [flu|v
System.arraycopy(h.queue,1,data,0,data.length); n23%[#,r
} cij]&$;Q
}3 fLV
private static class MaxHeap{ B]+7 JB
~*,Ddwr0a
void init(int[] data){ bn^mL~
this.queue=new int[data.length+1]; [XA&&EcU
for(int i=0;i queue[++size]=data; E7d~#
fixUp(size); r_qncy,F
} &etL&s v
} F:[Nw#gj/
gNMKGf\Y
private int size=0; (6b?ir~
-+j9X;h:
private int[] queue; 0{^l2?mgSb
0XBBA0tq
public int get() { CWobvR)e
return queue[1]; .P|+oYT&g
} jWO&SWso
IL8'{<lM
public void remove() { "Gi+zkVm
SortUtil.swap(queue,1,size--); ~:ub
fixDown(1); BJ:E,P`_
} A$H+4L
file://fixdown /Gh x2B
private void fixDown(int k) { ZYl-p]\*y
int j; ^6N3nkyZ
while ((j = k << 1) <= size) { 1%]{0P0?[
if (j < size %26amp;%26amp; queue[j] j++; 4X(1
if (queue[k]>queue[j]) file://不用交换 &\WkJ}&PnA
break; ZPxOds1m
SortUtil.swap(queue,j,k); sTYuwna~
k = j; 8`rAE_n`%
} M rH%hRV6R
} z</XnN
private void fixUp(int k) { b& _i/n(
while (k > 1) { gs`27Gih
int j = k >> 1; Zo}\gg3
if (queue[j]>queue[k]) XSHwE)m
break; zn?a|kt
SortUtil.swap(queue,j,k); ^~YmLI4
k = j; 4/mj"PBKL
} 2jrX
} JUaKj@a|
>FEQtD~F
} 8YJqM,t5)
}ii]cY
} NZw[.s>n
Fm[?@Z&wP
SortUtil： oN1wrf}Sh
AIRVvW~($
package org.rut.util.algorithm; +~pc%3*
7:R{~|R
import org.rut.util.algorithm.support.BubbleSort; MRl*rK
import org.rut.util.algorithm.support.HeapSort; sP8-gkkor
import org.rut.util.algorithm.support.ImprovedMergeSort; 7K5o" "
import org.rut.util.algorithm.support.ImprovedQuickSort; V"Y Fu^L
import org.rut.util.algorithm.support.InsertSort; u_/OTy
import org.rut.util.algorithm.support.MergeSort; T$8$9D_u
import org.rut.util.algorithm.support.QuickSort; RGPU~L
import org.rut.util.algorithm.support.SelectionSort; TF}4X;3Dsy
import org.rut.util.algorithm.support.ShellSort; KSpC%_LC
w]+BBGYQKb
/** WY.\<$7
* @author treeroot IG3K Pmu
* @since 2006-2-2 7+Jma!o
* @version 1.0 <J_,9&\J
*/ A](}"Pi!n
public class SortUtil { krnk%ug
public final static int INSERT = 1; n-| i
public final static int BUBBLE = 2; 0.+Z;j
public final static int SELECTION = 3; Z@aL"@2]a
public final static int SHELL = 4; *mhw5Z=!
public final static int QUICK = 5; `))J8j"
public final static int IMPROVED_QUICK = 6; .1?i'8TF
public final static int MERGE = 7; t%YX-@
public final static int IMPROVED_MERGE = 8; pfn#~gC_=
public final static int HEAP = 9; Vwh&^{Eh
3b[[2x_UU
public static void sort(int[] data) { Er+3S@sfq,
sort(data, IMPROVED_QUICK); z?) RF[
} 2.L6]^N p(
private static String[] name={ )b2E/G@X&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'hHX"\|RA
}; kFZu/HRI
0-MasI&b
private static Sort[] impl=new Sort[]{ G`JwAy r'
new InsertSort(), VEYKrZA
new BubbleSort(), d~1"{WPSn
new SelectionSort(), -0J<R;cVs
new ShellSort(), @f01xh=8
new QuickSort(), LVcy.kU@]
new ImprovedQuickSort(), f!kdcr=/"
new MergeSort(), JP% ;rAoJ
new ImprovedMergeSort(), n7!Lwq2
new HeapSort() X|lmH{kf
}; :bF2b..XOu
d.(]V2X.J
public static String toString(int algorithm){ ghd[G}
return name[algorithm-1]; ]` Gz_e
} i2R]lE8
8\t7}8f
public static void sort(int[] data, int algorithm) { ]be2jQx3
impl[algorithm-1].sort(data); z8[|LF-dx
} Dq1XZ%8
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public static interface Sort { ^|12~d_.T
public void sort(int[] data); JRs[%w`kD
} G/;aZ
IG@&l0ARL
public static void swap(int[] data, int i, int j) { .8xacVyK2
int temp = data; F"? *@L
data = data[j]; z{+;'9C
data[j] = temp; ~=]@],{
} H4",r5qw:
} >l*9DaZ