[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; Y8~"vuIE5
} t%0VJB,Q2
int i1=l; i+ ?^8#
int i2=mid+1; NZ:,ph
for(int cur=l;cur<=r;cur++){ @1roe G
if(i1==mid+1) 5uGq%(24
data[cur]=temp[i2++]; G5BfNU
else if(i2>r) O3,jg|,
data[cur]=temp[i1++]; `,<BCu
else if(temp[i1] data[cur]=temp[i1++]; `KoV_2|
else T4Uev*A
data[cur]=temp[i2++]; ZPLm]I\]
} N)X3XTY
} sUO`uqZV
vm8eZG|
} Rsm^Z!sn
i>`%TW:g
改进后的归并排序: y'q$|
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package org.rut.util.algorithm.support; 9s q
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import org.rut.util.algorithm.SortUtil; lukB8
tXs\R(?T
/** )qw&%sO +
* @author treeroot A|4[vz9>H
* @since 2006-2-2 IM'r8V
* @version 1.0 K($Npuu]
*/ N:/D+L
public class ImprovedMergeSort implements SortUtil.Sort { QA`sx
<iC(`J$D
private static final int THRESHOLD = 10; .*Y
U%QI a TN*
/* T.BW H2gRP
* (non-Javadoc) G9cUD[GB
* :g0zT[f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G5 WVr$
*/ ^\=`edN0
public void sort(int[] data) { tS=(}2Q
int[] temp=new int[data.length]; .Yn_*L+4*
mergeSort(data,temp,0,data.length-1); yR{3!{r3(
} ~B?y{
dUZ ,m9u
private void mergeSort(int[] data, int[] temp, int l, int r) { (hbyEQhF
int i, j, k; V**~m9f
int mid = (l + r) / 2; ( Erc3Ac8
if (l == r) Z@!+v19^
return; ?0SJfh
if ((mid - l) >= THRESHOLD) YNF k
mergeSort(data, temp, l, mid); \_f(M|
else 3XV/Fb}!(i
insertSort(data, l, mid - l + 1); HIZe0%WPw
if ((r - mid) > THRESHOLD) H*CW1([
mergeSort(data, temp, mid + 1, r); &Ok):`
else OQJ6e:BGt
insertSort(data, mid + 1, r - mid); Vt#.eL)Ee
^<2p~h0 \
for (i = l; i <= mid; i++) { s.C_Zf~3
temp = data; 64tvP^kp
} -uf|w?
for (j = 1; j <= r - mid; j++) { @\#td5'
temp[r - j + 1] = data[j + mid]; r;N|)
} 3 Za}b|
int a = temp[l]; U>N1Od4vTO
int b = temp[r]; VMWf>ZU
for (i = l, j = r, k = l; k <= r; k++) { ISvpQ 3{)s
if (a < b) { }5"u[Z.
data[k] = temp[i++]; ( a#BV}=
a = temp; &tj!*k'
} else { 0L52#;?Si"
data[k] = temp[j--]; 3.y vvPFEM
b = temp[j]; /j.9$H'y
} ]t"Ss_,
} sQZhXaMa $
} pEA:L$&
5nx1i
/** x[e<} 8'$(
* @param data A.w.rVDD
* @param l }O p; g^W
* @param i 3u0RKLc\
*/ Iu=(qU
private void insertSort(int[] data, int start, int len) { |vj/Wwr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^U/O!GK
} N8df8=.kw
} <N~K;n v
} S,8elKH4
} =7UsVn#o
-XG@'P_
堆排序： x kD6Iw
]6j{@z?{
package org.rut.util.algorithm.support; #GFr`o0$^
n `Ac 3A
import org.rut.util.algorithm.SortUtil; F8ulkcD
gjlx~.0d
/** xoME9u0x4
* @author treeroot ;n;p@Uu[ b
* @since 2006-2-2 'Pbr v
* @version 1.0 uXiN~j &Be
*/ [nh>vqum
public class HeapSort implements SortUtil.Sort{ o4WDh@d5S
-Lg Ei3m
/* (non-Javadoc) R.3q0yZ wF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }6ldjCT/,
*/ [#iz/q~}
public void sort(int[] data) { 5bb(/YtFy
MaxHeap h=new MaxHeap(); _yT Ed"$
h.init(data); 2fS:- 8N
for(int i=0;i h.remove(); LR3*G7
System.arraycopy(h.queue,1,data,0,data.length); CvdN"k
} $:^td/p J
,]D,P
private static class MaxHeap{ 6S{l'!s'
|':{lH6+1
void init(int[] data){ 7|H$ /]
this.queue=new int[data.length+1]; T> p&$]OG
for(int i=0;i queue[++size]=data; 1 -b_~DF
fixUp(size); moE2G?R
} &M[?h}B6
} @}ZVtrz
H;"4C8K7
private int size=0; 2A!FDr~cdT
k;W XB|k
private int[] queue; vKR[&K{Z|
tl>7^hH
public int get() { ss-D(K"
return queue[1]; 2t,zLwBdnJ
} *z2s$EZ
@%SQFu@FJ
public void remove() { 6H|S;K+
SortUtil.swap(queue,1,size--); FiU#T.`9'
fixDown(1); `F6C-
} BJ0?kX@
file://fixdown y+q5UC|
private void fixDown(int k) { e';_Y>WQy
int j; aQ~s`^D
while ((j = k << 1) <= size) { I}Q2Vu<
if (j < size %26amp;%26amp; queue[j] j++; =\d?'dII:
if (queue[k]>queue[j]) file://不用交换 OrG).^l
break; tnIX:6
SortUtil.swap(queue,j,k); |cY`x(?yP
k = j; 9!tW.pK5
} azU"G(6y?+
} O H7FkR
private void fixUp(int k) { ]%(2hY~i
while (k > 1) { oXS}IL og'
int j = k >> 1; ?1".;foZ
if (queue[j]>queue[k]) y?!"6t7&
break; H']+L~j
SortUtil.swap(queue,j,k); r_.S>]
k = j; t:c.LFrF
} mcok/,/
} zn(PI3+]!
aN=B]{!
} J-4:H gx
IM+o.@f-
} ::F|8
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SortUtil： &~w}_Fjk
\(T/O~b2
package org.rut.util.algorithm; Xm2'6f,
p<;0g9,1
import org.rut.util.algorithm.support.BubbleSort; iyog`s c
import org.rut.util.algorithm.support.HeapSort; W'.m'3#z
import org.rut.util.algorithm.support.ImprovedMergeSort; *9i{,I@
import org.rut.util.algorithm.support.ImprovedQuickSort; s9d_GhT%-
import org.rut.util.algorithm.support.InsertSort; v.ui!|c
import org.rut.util.algorithm.support.MergeSort; PYzvCf`?
import org.rut.util.algorithm.support.QuickSort; -!9G0h&i|
import org.rut.util.algorithm.support.SelectionSort; Y4(
import org.rut.util.algorithm.support.ShellSort; 8x{'@WCG%
'Z|mQZN
/** ,v&(YOd
* @author treeroot {}Za_(Y,]
* @since 2006-2-2 t()c=8qF|u
* @version 1.0 v9->nVc-
*/ a@*\o+Su
public class SortUtil { \^%}M!tan
public final static int INSERT = 1; ~3 bPIg7D
public final static int BUBBLE = 2; ;({W#Wa
public final static int SELECTION = 3; !?gKqx'T$
public final static int SHELL = 4; <"|,"hA
public final static int QUICK = 5; >dG[G>
public final static int IMPROVED_QUICK = 6; O7IJ%_A&
public final static int MERGE = 7; yvYad
public final static int IMPROVED_MERGE = 8; O0y_Lm\
public final static int HEAP = 9; JO<wU
,4oo=&
public static void sort(int[] data) { >e"#'K0?\
sort(data, IMPROVED_QUICK); mdgi5v
} Wiu"k%Qsh
private static String[] name={ Qz N&>sk"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6i~WcAs
}; Ue~CwFOc
LE>]8[f6S
private static Sort[] impl=new Sort[]{ d<N:[Y\4l
new InsertSort(), `$C n~dT
new BubbleSort(), j,dR,Nd
new SelectionSort(), \} :PLCKT
new ShellSort(), cjIh}:|'
new QuickSort(), <3hRyG@vB
new ImprovedQuickSort(), H+Sz=tg5
new MergeSort(), 7x4PaX(
new ImprovedMergeSort(), ,Vk3kmuvr]
new HeapSort() !=P1%
}; l2P=R)@{
'y3!fN=h
public static String toString(int algorithm){ OH(waKq2I
return name[algorithm-1]; =rCIumqD-}
} V% 6I\G2/:
r? E)obE
public static void sort(int[] data, int algorithm) { }@+:\
impl[algorithm-1].sort(data); wx0j(:B]
} _t #k,;
<3C*Z"aQ>|
public static interface Sort { &@Be2!%'9K
public void sort(int[] data); 8C9-_Ng`
} "mvt>X
9e,0\J
public static void swap(int[] data, int i, int j) { Hn+~5@.
int temp = data; 8&`LYdzt
data = data[j]; U0N 60
data[j] = temp; xRLT=.ir
} EE'io5\et
} iVq'r4S