[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; T]X{@_
} 2HVCXegq
int i1=l; |lHFo{8"
int i2=mid+1; Wbs^(iUU}
for(int cur=l;cur<=r;cur++){ 9!S^^;PN&
if(i1==mid+1) k7b(QADqUU
data[cur]=temp[i2++]; j%GbgJ
else if(i2>r) {"\q(R0
data[cur]=temp[i1++]; |Rk37P{
else if(temp[i1] data[cur]=temp[i1++]; (>r|j4$
else bN4d:0Y
data[cur]=temp[i2++]; T/5nu?v
} ,@,LD u
} /W``LK>;?
}*ODM6
} 4Q/r[x/&C
l^BEFk;
改进后的归并排序: \)s3b/oap
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package org.rut.util.algorithm.support; yx 7loy$[
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import org.rut.util.algorithm.SortUtil; F94V5_[
!~tnti6
/** M;> ha,x
* @author treeroot cnC_#kp
* @since 2006-2-2 {!g?d<*
* @version 1.0 }RH lYN
*/ <f[9ju
public class ImprovedMergeSort implements SortUtil.Sort { +%x^RV}
*+&z|Pwv[^
private static final int THRESHOLD = 10; hxP6C6S
\4C)~T:*
/* zAu}hVcW
* (non-Javadoc) 6WCmp,*
* KdS eCeddW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8\P JSr
*/ i:R!T,
public void sort(int[] data) { \S'cWB
int[] temp=new int[data.length]; oNrEIgaA(+
mergeSort(data,temp,0,data.length-1); T?ZOHH8
} %pd5w~VP
0\QYf0o
private void mergeSort(int[] data, int[] temp, int l, int r) { |@OJ~5H/{
int i, j, k; JPHUmv6
int mid = (l + r) / 2; a{5H33JA
if (l == r) .!!79 6hS
return; q^u6f?B
if ((mid - l) >= THRESHOLD) z{@=_5;
mergeSort(data, temp, l, mid); A"`L~|&
else M3)v-"
insertSort(data, l, mid - l + 1); kA1f[AL
if ((r - mid) > THRESHOLD) ,7QBJ_-;QJ
mergeSort(data, temp, mid + 1, r); 3s#|Y,{?6R
else !Q[;5Lqt
insertSort(data, mid + 1, r - mid); rK*hTjVn
m]E o(P4+
for (i = l; i <= mid; i++) { ,&-S?|
temp = data; }#YIl@E
} %+/f'6kR
for (j = 1; j <= r - mid; j++) { R A*(|n>
temp[r - j + 1] = data[j + mid]; NEZH<#
} .Y+mwvLpRG
int a = temp[l]; \-DM-NrZ1U
int b = temp[r]; ]w5ji
for (i = l, j = r, k = l; k <= r; k++) { 1 VPg`+o
if (a < b) { U<1}I.hDJ
data[k] = temp[i++]; +'!h-x1y~
a = temp; :17ee
} else { p<<6}3~
data[k] = temp[j--]; iJ5e1R8tN
b = temp[j]; UeFtzty,a
} S6=\r{V
} 27}.s0{D
} 4u7c7K>\Y
m>g}IX&K'
/** *G8'Fjin'T
* @param data Qf/j:
* @param l Jv-zB]3&
* @param i 2pVVoZV.<
*/ =]8f"wAh*
private void insertSort(int[] data, int start, int len) { fp`U?S6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ADuZ}]
} gvvFU,2
} @WMj^t1D+
} rGQ86L<
} 3 (Gygq#
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堆排序： O8!!UA8V
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package org.rut.util.algorithm.support; }M;sz
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import org.rut.util.algorithm.SortUtil; pT|./ Fe
H&"_}
/** s0x@ u
* @author treeroot kfH9Y%bOy
* @since 2006-2-2 {"qW~S90YO
* @version 1.0 >b[4
*/ !pE>O-| K
public class HeapSort implements SortUtil.Sort{ q8&4=eV\A
H620vlC}V
/* (non-Javadoc) D/+@d:-G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T\<M?`Y
*/ UHTb61Gs
public void sort(int[] data) { ~hxeD" w
MaxHeap h=new MaxHeap(); C.DoXE7
h.init(data); V>~*]N^f
for(int i=0;i h.remove(); q>Dr)x)
System.arraycopy(h.queue,1,data,0,data.length); A- <.#
} WV9[DFU
t!+%g) @
private static class MaxHeap{ 7$E2/@f
%3#b6m~
void init(int[] data){ CNpCe-%&
this.queue=new int[data.length+1]; A5(kOtgiT
for(int i=0;i queue[++size]=data; SLbavP#G
fixUp(size); S^_JC
} x`j_d:C~G
} AmUe0CQ:k'
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private int size=0; 8trm`?>
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private int[] queue; oW\Q>c7 =
rzc 3k~@
public int get() { #,Fx@3y\a
return queue[1]; _.s\qQ
} 72BzvY.
+4p2KYO
public void remove() { b*$o[wO9
SortUtil.swap(queue,1,size--); .pNq-T
fixDown(1); =}6Z{}(TT
} i&AXPq>`
file://fixdown jb6ZAT<8
private void fixDown(int k) { 06j)P6Iju
int j; dqK
while ((j = k << 1) <= size) { \Ho#[k=y*/
if (j < size %26amp;%26amp; queue[j] j++; .1l[l5$
if (queue[k]>queue[j]) file://不用交换 w|3fioLs
break; =qVAvo'
SortUtil.swap(queue,j,k); KJ05Zx~uma
k = j; Rwi5+;N
} ,sy/rV
} \f<thd*bC
private void fixUp(int k) { *axza~d
while (k > 1) { =#PudF.\
int j = k >> 1; a*e|>pDO
if (queue[j]>queue[k]) t}* qs
break; QvyUd%e'5A
SortUtil.swap(queue,j,k); {BwN4r46
k = j; :;#c:RKi:
} yD=)&->Ra
} +LU).
Qcy+ {j]
} ;_;H(%uY
NEjBjLJZ
} j2C^1:s@m
^{:[^$f:l
SortUtil： s^x ,S
*jqPKK/
package org.rut.util.algorithm; '!2
'j=PbA
import org.rut.util.algorithm.support.BubbleSort; r]K0 ]h@B
import org.rut.util.algorithm.support.HeapSort; 0v,`P4_k
import org.rut.util.algorithm.support.ImprovedMergeSort; YH:W]
import org.rut.util.algorithm.support.ImprovedQuickSort; r>D[5B
import org.rut.util.algorithm.support.InsertSort; !{|yAt9kP
import org.rut.util.algorithm.support.MergeSort; x,@O:e
import org.rut.util.algorithm.support.QuickSort; o2t@-dNi
import org.rut.util.algorithm.support.SelectionSort; 4$#ia F
import org.rut.util.algorithm.support.ShellSort; 9Y*VzQE
T<_1|eH
/** o::ymAj
* @author treeroot Yc( )'6
* @since 2006-2-2 A?<"^<A^
* @version 1.0 gJ}'O4*b
*/ ;L/T}!Dx
public class SortUtil { 62KW HB9S
public final static int INSERT = 1; >G-?e!
public final static int BUBBLE = 2; MYW 4@#
public final static int SELECTION = 3; Ij,?G*
public final static int SHELL = 4; 9dhFQWz"
public final static int QUICK = 5; YfYL?G
public final static int IMPROVED_QUICK = 6; u8)r W
public final static int MERGE = 7; Et[QcB3
public final static int IMPROVED_MERGE = 8; 1Y"y!\t7G
public final static int HEAP = 9; GCmVmOdKr
F$pd]F!#
public static void sort(int[] data) { iH -x
sort(data, IMPROVED_QUICK); Q(eQZx{
} 5;uX"zG
private static String[] name={ nD{;4$xP`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )a2m<"
}; GA*Khqdid
& ;x1Rx
private static Sort[] impl=new Sort[]{ &|,qsDK(
new InsertSort(), wBaFC\CW
new BubbleSort(), 4~J1pcBno%
new SelectionSort(), /$N#_Xblr
new ShellSort(), JT+lWhy
new QuickSort(), =u1w\>(2Y
new ImprovedQuickSort(), ,)\5O0 D6
new MergeSort(), `oI/;&
new ImprovedMergeSort(), x'PjP1
new HeapSort() 'jO-e^qT
}; J}`$WL:
)^a#Xn3z
public static String toString(int algorithm){ [/`Hz]R
return name[algorithm-1]; _TeRsA
} iPi'5g(a
"r(pK@h
public static void sort(int[] data, int algorithm) { Vste$V
impl[algorithm-1].sort(data); 9kiy^0 7G
} [(ib9_`A'1
Ih0>]h-7
public static interface Sort { ,'0oj$~S:
public void sort(int[] data); Yoym5<xE
} T;e(Q,!H
V$]a&wM<5
public static void swap(int[] data, int i, int j) { V?pO~qo
int temp = data; Bd]DhPhJ
data = data[j]; /bj`%Q.n
data[j] = temp; C4K&flk]
} 9YsO+7[
} |a~&E@0c