[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; &[PA?#I`
} E3CwA8)k
int i1=l; ;kG"m7-/
int i2=mid+1; < jX5}@`z
for(int cur=l;cur<=r;cur++){ lEQj62zIQ
if(i1==mid+1) iK5[P
data[cur]=temp[i2++]; }-Nc}%5
else if(i2>r) qsQTJlq)
data[cur]=temp[i1++]; ][8`}ki 1
else if(temp[i1] data[cur]=temp[i1++]; pgv, Su
else x'Nc}
data[cur]=temp[i2++]; RO[X#c
} 0d0ga^O
} k $# ,^)T
uE%2kB*]
} @aB7dtM
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改进后的归并排序: !b$~Sm)
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package org.rut.util.algorithm.support; mSEX?so=[
LS-_GslE7\
import org.rut.util.algorithm.SortUtil; F+D e"^As
NUuIhB+
/** M,r8 No
* @author treeroot u@Z6)r'
* @since 2006-2-2 r. rzU
* @version 1.0 tp\d:4~R
*/ +}mj;3i
public class ImprovedMergeSort implements SortUtil.Sort { [KW)z#`*
9zLeyw\
private static final int THRESHOLD = 10; pG v*{.
eQfXUpk3@I
/* T&<ee|t@{
* (non-Javadoc) ( ~JtKSq%
* XE;'K`%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -_Z
*/ $P #KL//
public void sort(int[] data) { :o:/RRp[
int[] temp=new int[data.length]; O/&Qzt
mergeSort(data,temp,0,data.length-1); |uM=pm;H
} :prx:7
9T2y2d!X
private void mergeSort(int[] data, int[] temp, int l, int r) { TyR@3H
int i, j, k; xHkxrXqeI
int mid = (l + r) / 2; 4dI`
if (l == r) b>} )G7b}
return; i\K88B&24
if ((mid - l) >= THRESHOLD) cA90FqUH
mergeSort(data, temp, l, mid); Yqt~h
else Yic4|N?u
insertSort(data, l, mid - l + 1); Gy'/)}}Z
if ((r - mid) > THRESHOLD) |B2>}Y/
mergeSort(data, temp, mid + 1, r); BG1hk!
else MTbCL53!-
insertSort(data, mid + 1, r - mid); y8v0>V0)
a\p`J9Z@
for (i = l; i <= mid; i++) { vhU#<59a1
temp = data; H.tfn>N|
} 0^d<@\
for (j = 1; j <= r - mid; j++) { |g<l|lqz|
temp[r - j + 1] = data[j + mid]; LZJFp@
} <yw=+hz[u
int a = temp[l]; ,GtN6?
int b = temp[r]; &5%~Qw..
for (i = l, j = r, k = l; k <= r; k++) { +N|t:8qaf
if (a < b) { ndvt $*
data[k] = temp[i++]; AFsYP/g]
a = temp; MJn=
} else { NMN&mJsmh
data[k] = temp[j--]; 2Fbg"de3-
b = temp[j]; ~KxK+6[ :
} 9G[t &r
} g(o^'f
} WjvgDNk
6x16?x
/** P qa;fiJ)
* @param data Rf{YASPIw&
* @param l q9Lq+4\
* @param i V#~.n;d
*/ &i*e&{L7
private void insertSort(int[] data, int start, int len) { B\~(:(OPM]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QC1\Sn/
} 2FN#63
} e,*@+E\4
} %)o;2&aD
} PD^Cj?wm
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堆排序： tSTl#xy
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package org.rut.util.algorithm.support; "Q[?W(SA
;F/w&u.n
import org.rut.util.algorithm.SortUtil; }l5Q0'
87R$Y> V
/** =o[H2o y
* @author treeroot {t('`z
* @since 2006-2-2 oe=W}y_k
* @version 1.0 VexQ ]
*/ (%4O\s#l
public class HeapSort implements SortUtil.Sort{ VE^IA\J x
X/D% cQ6
/* (non-Javadoc) NLev(B:OQH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t2FA|UF
*/ R]d934s
public void sort(int[] data) { jZ,=tF
MaxHeap h=new MaxHeap(); #*+$o<Q]9
h.init(data); 1L4v X
for(int i=0;i h.remove(); KP gzB^>
System.arraycopy(h.queue,1,data,0,data.length); jf=90eJc
} #\6k_toZ
yONX?cS
private static class MaxHeap{ GP=bp_L
l0%7u
void init(int[] data){ EV R>R
this.queue=new int[data.length+1]; Ro#O{
for(int i=0;i queue[++size]=data; v;Rm42k
fixUp(size); A/~^4DR
} oK2jPP
} J+qcA}
Nbt.y 'd
private int size=0; M{X; H'2
4`:Eiik&p
private int[] queue; #D%l;Ae
is{H >#+"
public int get() { YF)c.Q0
return queue[1]; oox;8d4}y
} ezhK[/E=
}t1J`+x%
public void remove() { Qt=OiKZ
SortUtil.swap(queue,1,size--); W'Y#(N[ktP
fixDown(1); 9gETWz(3I
} A3Vj3em
file://fixdown ^{64b
private void fixDown(int k) { JzkI!5c<j
int j; nO8e'&|
while ((j = k << 1) <= size) { {fn1sGA
if (j < size %26amp;%26amp; queue[j] j++; N. 0~4H %U
if (queue[k]>queue[j]) file://不用交换 \WM"VT
break; +VO(6Jn
SortUtil.swap(queue,j,k); (5)DQ1LaF
k = j; Y-]Ne"+vf
} xepp."O
} SB^xq
private void fixUp(int k) { +QEiY~i
while (k > 1) { YvFt*t
int j = k >> 1; 3Sn# M{wH
if (queue[j]>queue[k]) w[/m:R?eX
break; DhiIKd9W
SortUtil.swap(queue,j,k); 9-Xr
k = j; (6i.>%|_
} =la~D]T*g
} ;2547b[]
@E?o~jO(e
} &xS] ;Fr
mz3Dt>
} ;<BMgO}N
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SortUtil： o AM)<#U>
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package org.rut.util.algorithm; >'&|{s[m
;x-]1xx_
import org.rut.util.algorithm.support.BubbleSort; $kY ]HI
import org.rut.util.algorithm.support.HeapSort; \C"hL(4-
import org.rut.util.algorithm.support.ImprovedMergeSort; BB? 4>#D
import org.rut.util.algorithm.support.ImprovedQuickSort; jR^_1bu
import org.rut.util.algorithm.support.InsertSort; 1-8G2e
import org.rut.util.algorithm.support.MergeSort; *NoixV1>
import org.rut.util.algorithm.support.QuickSort; w*gG1BV
import org.rut.util.algorithm.support.SelectionSort; XK/bE35%^!
import org.rut.util.algorithm.support.ShellSort; d08:lYQ
jJe?pT]o
/** lT;uL~j
* @author treeroot Di&XDW/
* @since 2006-2-2 j2=|,AmC
* @version 1.0 n?8xRaEf
*/ 1oL3y;>iL
public class SortUtil { luCwP
public final static int INSERT = 1; RFLw)IWkL_
public final static int BUBBLE = 2; vm8ER,IW)
public final static int SELECTION = 3; ]Tn""3#1g
public final static int SHELL = 4; mh,a}bX{
public final static int QUICK = 5; M)sAMfuUw
public final static int IMPROVED_QUICK = 6; r!/<%\S
public final static int MERGE = 7; "_n})s f
public final static int IMPROVED_MERGE = 8; <!derr-K
public final static int HEAP = 9; I$oqFF|D
Pr#uV3\
public static void sort(int[] data) { noO#o+ Jg#
sort(data, IMPROVED_QUICK); )^j62uv
} >ui;B$=
private static String[] name={ `5MK(K :
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6sNw#pqh
}; GyQvodqD
Qv1cf
private static Sort[] impl=new Sort[]{ >yqFO
new InsertSort(), I"HA( +G
new BubbleSort(), X>U _v
new SelectionSort(), 0G(|`xG1q
new ShellSort(), RdLk85<n
new QuickSort(), NwNjB w%v
new ImprovedQuickSort(), V6fJaZ
new MergeSort(), O@`KGZEPY
new ImprovedMergeSort(), ~SYW@o
new HeapSort() .FA99|:
}; )Qh*@=$-
axz.[L_elB
public static String toString(int algorithm){ Zo}vV2
return name[algorithm-1]; \-r"%@OkW
} R#HX}[Hb
B9S@G{`
public static void sort(int[] data, int algorithm) { \qtdbi|Y
impl[algorithm-1].sort(data); u4DrZ-v
} R^@
?$ M:4mX
public static interface Sort { H}gp`YW:4
public void sort(int[] data); <AU0ir
} b8|<O:]Hp
YhL^kM@c
public static void swap(int[] data, int i, int j) { /?u]Fj
int temp = data; -{NP3zy
data = data[j]; %\Mc6
data[j] = temp; yBfX4aH:`
} $ U-#woXa
} jt3=<&*Bm