[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; #;n+YM">:
} `V)Z)uN{0
int i1=l; pa}*E
int i2=mid+1; Z_\C*^
for(int cur=l;cur<=r;cur++){ +&zYZA8v
if(i1==mid+1) 6v,z@!b
data[cur]=temp[i2++]; ^pn(=4
else if(i2>r) k = ?h~n0M
data[cur]=temp[i1++]; WI]o cF
else if(temp[i1] data[cur]=temp[i1++]; ^[%%r3"$C
else =%'`YbD$
data[cur]=temp[i2++]; ZmOfEg|h\
} R52I= a5,*
} zF5uN:-s
Oj<S.fi
} ["\;kJ.
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改进后的归并排序: I^o!n5VM
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package org.rut.util.algorithm.support; +T9:Udi
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import org.rut.util.algorithm.SortUtil; BBcV9CGU
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/** hhoEb(BA
* @author treeroot Y#!h9F
* @since 2006-2-2 4f(Kt,0
* @version 1.0 )%!XSsY.N|
*/ u?sVcD[
public class ImprovedMergeSort implements SortUtil.Sort { $}")1|U,X
qY\f'K}Q*
private static final int THRESHOLD = 10; b64 @s2]
$gBd <N9|c
/* jxJv.
* (non-Javadoc) }|%eCVB
* ?g!V!VS2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P/&]?f0/
*/ [AV4m
public void sort(int[] data) { 1-.~7yC
int[] temp=new int[data.length]; 5NJ4
mergeSort(data,temp,0,data.length-1); hzk6rYg1
} nQ|r"|g
vkLC-Mzm<
private void mergeSort(int[] data, int[] temp, int l, int r) { mSk5u7
int i, j, k; lO2[JP
int mid = (l + r) / 2; E^U0f/5 m
if (l == r) xkOpa,=FI
return; y4+;z2'>
if ((mid - l) >= THRESHOLD) RpLE 02U
mergeSort(data, temp, l, mid); |yo\R{&6
else V.wqZ {G
insertSort(data, l, mid - l + 1); 64:fs?H
if ((r - mid) > THRESHOLD) mo~*C
mergeSort(data, temp, mid + 1, r); Qp`gswvE
else =_YG#yS
insertSort(data, mid + 1, r - mid); 0ZQ'_g|%
ccd8O{G.M
for (i = l; i <= mid; i++) { /c):}PJ^#7
temp = data; 4Jx"A\5*G
} PqM1aoyX
for (j = 1; j <= r - mid; j++) { )}9rwZ
temp[r - j + 1] = data[j + mid]; !n^OM?.4
} ?WE
int a = temp[l]; m|OO,gR
int b = temp[r]; h$L"8#
for (i = l, j = r, k = l; k <= r; k++) { RmZ]" `
if (a < b) { "vtCTl~t
data[k] = temp[i++]; NH_<q"gT
a = temp; !nAX$i~
} else { ?`J[[",
data[k] = temp[j--]; ~}Rj$%_
b = temp[j]; r H~" 4
} I@\OaUGr+
} BC'llD
} s`>[F@N7.o
[5Lz/ix=
/** pKi&[
* @param data Rb3V^;i
* @param l -.{g}R%
* @param i NY?;erX
*/ RoAlf+&Qb
private void insertSort(int[] data, int start, int len) { dK>7fy;mv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); trE{FT
} ZcYh) HD
} ]r_;dYa
} %u;~kP|S%
} z2Z^~,i
7=(Hy\Q5xH
堆排序： U4G`ZKv(!
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package org.rut.util.algorithm.support; LY-2sa#B$-
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import org.rut.util.algorithm.SortUtil; fU!<HDh
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/** /> 4"~q)
* @author treeroot "O(9m.CZ
* @since 2006-2-2 }pJwj
* @version 1.0 P (S>=,Y&
*/ 0T46sm r
public class HeapSort implements SortUtil.Sort{ 'fPdpnJ<
r[K5w
/* (non-Javadoc) MX+Z ?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |\n_OS7
*/ N<DGw?Rl
public void sort(int[] data) { In[Cr/&/Y
MaxHeap h=new MaxHeap(); #h/Mbj~S
h.init(data); )XWP\ h
for(int i=0;i h.remove(); |.wEm;Bz
System.arraycopy(h.queue,1,data,0,data.length); H'HSD,>(
} `7H4Y&E
]n-:Yv5 W
private static class MaxHeap{ 9Vf1Xz
qpXWi &g
void init(int[] data){ (dv]=5""
this.queue=new int[data.length+1]; a5w:u5
for(int i=0;i queue[++size]=data; 'MY/*k7:
fixUp(size); 2=_gf
} f47M#UC
} zhf.NCSt(
O eL}EVs8=
private int size=0; Bm]8m=p
wgw(YU
private int[] queue; QD%L0;j
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public int get() { ~9j%Hm0ht
return queue[1]; t#2(j1
} P 3'O/!
x.q+uU$^
public void remove() { k?'B*L_Mzv
SortUtil.swap(queue,1,size--); ?Ae ven
fixDown(1); 4rrSb*
} /d%=E
file://fixdown >KJ+-QuO&
private void fixDown(int k) { ) Yd?m0m*
int j; r\/+Oa'
while ((j = k << 1) <= size) { M|Rb&6O
if (j < size %26amp;%26amp; queue[j] j++; x*/S*!vx\
if (queue[k]>queue[j]) file://不用交换 oJfr +3I
break; >;[*!<pfK5
SortUtil.swap(queue,j,k); Phke`3tth
k = j; @*sWu_-Y%
} =%/)m:f!^
} AF%@VLf
private void fixUp(int k) { GI&h`X5,e
while (k > 1) { KVJ_E!i
int j = k >> 1; f& CBU
if (queue[j]>queue[k]) 8w.YYo8`
break; RU\/j%^
SortUtil.swap(queue,j,k); pa#IJ
k = j; s;A@*Y;v
} cb}[S:&|
} uS^Ipxe\
yeMB0Z*r
} MNV% =G
Gh}*q|Lz
} ukUGvK
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SortUtil： Q 7?#=N?
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package org.rut.util.algorithm; {E8~Z8tT
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import org.rut.util.algorithm.support.BubbleSort; R47\Y
import org.rut.util.algorithm.support.HeapSort; 15sp|$&`
import org.rut.util.algorithm.support.ImprovedMergeSort; /~<@*-'
import org.rut.util.algorithm.support.ImprovedQuickSort; r3PT1'P?L
import org.rut.util.algorithm.support.InsertSort; cMOyo<F#^=
import org.rut.util.algorithm.support.MergeSort; LSRk7'0
import org.rut.util.algorithm.support.QuickSort; b1($R[
import org.rut.util.algorithm.support.SelectionSort; 7"C$pm6
import org.rut.util.algorithm.support.ShellSort; j}C}:\-fY
Ct>GYk$
/** ){b@}13cF
* @author treeroot HZ:6zH
* @since 2006-2-2 g?ULWeZg5
* @version 1.0 _D+J!f^
*/ X93!bB
public class SortUtil { r! MWbFw|X
public final static int INSERT = 1; ZEx}$<)_
public final static int BUBBLE = 2; Ll4g[8
public final static int SELECTION = 3; 5bgs*.s
public final static int SHELL = 4; - RU=z!{
public final static int QUICK = 5; )<tI!I][j
public final static int IMPROVED_QUICK = 6; S@/IQR
public final static int MERGE = 7; a5TioQ
public final static int IMPROVED_MERGE = 8; ~5oPpTAe
public final static int HEAP = 9; G2T|RT$_K
n~V ]Z
public static void sort(int[] data) { .~7FyLl$
sort(data, IMPROVED_QUICK); ?)ONf#4Y
} :Cj OPl
private static String[] name={ (R("H/6xs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v p/yG
}; U3dwI:cG
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private static Sort[] impl=new Sort[]{ AnX%[W "
new InsertSort(), e(<str>
new BubbleSort(), FFEfI4&SfS
new SelectionSort(), s|y "WDyx5
new ShellSort(), ZG&>:Si;
new QuickSort(), mmk=97
new ImprovedQuickSort(), #iHs* /85
new MergeSort(), Ev}C<zk*
new ImprovedMergeSort(), TJR:vr
new HeapSort() fNW"+ <W
}; 0a XPPnuX
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public static String toString(int algorithm){ UWo]s.
return name[algorithm-1]; pz.JWCU1
} JAem0jPC8
yL-YzF2
public static void sort(int[] data, int algorithm) { G\+L~t
impl[algorithm-1].sort(data); y#z
} m0a?LY
(bH`x]h#
public static interface Sort { MjC_ (cs
public void sort(int[] data); E;R n`oxk
} /~$WUAh
abfW[J
public static void swap(int[] data, int i, int j) { /Y2}a<3&0
int temp = data; U ^5Kz-5.
data = data[j]; _ =VqrK7T
data[j] = temp; vkEiOFU!u
} sW'2+|3"
} DrY:9[LP