[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; zt0 zKXw
} DboqFh#]=h
int i1=l; $@wkQ%
int i2=mid+1; r%n[PK^(
for(int cur=l;cur<=r;cur++){ TD7ONa-,
if(i1==mid+1) s&</zU'
data[cur]=temp[i2++]; k#[s)Ja?s
else if(i2>r) !o!04_
data[cur]=temp[i1++]; gs>cx]>
else if(temp[i1] data[cur]=temp[i1++]; ~!kbB4`WK
else D IN PAyY
data[cur]=temp[i2++]; [K- s\
} XU7bWafy
} >m!.l{*j>N
-2_$zk*n
} zPYa@0I
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改进后的归并排序: K e8cfd~c
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package org.rut.util.algorithm.support; bHnQLJ
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import org.rut.util.algorithm.SortUtil; R&0l4g-4>
Y~xZ{am
/** 2Oa-c|F
* @author treeroot Qrh9JFqdG6
* @since 2006-2-2 |?kH]Trr
* @version 1.0 ,YTIYG](
*/ p2K9R4
public class ImprovedMergeSort implements SortUtil.Sort { gKCIfxM
'CX KphlWs
private static final int THRESHOLD = 10; ewg WzB9c
`fyAV@X
/* Y)`+u#` R
* (non-Javadoc) f14c}YY
* .bGeZwvf:G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Q+3aEUE
*/ <9~qAq7^
public void sort(int[] data) { aJ5R0Y,
int[] temp=new int[data.length]; S)%x22sqf
mergeSort(data,temp,0,data.length-1); t/g}cR^Q
} (1^(V)@
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private void mergeSort(int[] data, int[] temp, int l, int r) { k|5nu-B0v
int i, j, k; :*1w;>o)n
int mid = (l + r) / 2; -,&Xp>u\
if (l == r) i_"I"5pBF
return; lLhCk>a
if ((mid - l) >= THRESHOLD) %Y TIS*+0
mergeSort(data, temp, l, mid); wah`
else "6i9f$N
insertSort(data, l, mid - l + 1); 4SYN$?.Mp
if ((r - mid) > THRESHOLD) b}:Z(L,\
mergeSort(data, temp, mid + 1, r); 0bE_iu>f'
else _f`m/l
insertSort(data, mid + 1, r - mid); nq=fSK(
>. Y~F(
for (i = l; i <= mid; i++) { )[1m$>
temp = data; /L.a:Er$
} F@BNSs N=
for (j = 1; j <= r - mid; j++) { -)@.D>HsOt
temp[r - j + 1] = data[j + mid]; p98lu'?@
} & \m\QI
int a = temp[l]; UL/>t}AG
int b = temp[r]; P7b2I=t
for (i = l, j = r, k = l; k <= r; k++) { ,o)MiR9-[A
if (a < b) { ,n*.Yq
data[k] = temp[i++]; 5kF5`5+Vj
a = temp; t>xV]W<
} else { iYf4 /1IG,
data[k] = temp[j--]; FyEl@ }W
b = temp[j]; C6n4OU
} SxDE3A-:
} ;Yj}9[p;T
} TI332,eL
nCrNZ&P
/** Mw~?@Sq
* @param data AZa3!e/1
* @param l kBzzi^cl
* @param i zP9!fA
*/ X$* 'D)
private void insertSort(int[] data, int start, int len) { }/VHeHd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v09f#t$;5
} oZ}e w!V
} g:Dg?_o
} X'c5s~9
} luMNi^FQ
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堆排序： )~`zjVx_
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package org.rut.util.algorithm.support; AOe~VW
NQG"}=KA
import org.rut.util.algorithm.SortUtil; -cKR15
vzw\f
/** K +~
* @author treeroot ;VuIQ*@m"
* @since 2006-2-2 <R2
* @version 1.0 Y'-Lt5SCS
*/ Q%7EC>V
public class HeapSort implements SortUtil.Sort{ TDoYp
GYYro&aq{
/* (non-Javadoc) &l Q j?]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JI^w1I, T
*/ W{0:8_EI
public void sort(int[] data) { Q-"FmD-Yw
MaxHeap h=new MaxHeap(); ;Gi w7a)
h.init(data); SCjACQ}-
for(int i=0;i h.remove(); EP[ gq
System.arraycopy(h.queue,1,data,0,data.length); "rXGXQu
} *=v RX!sI,
?sO_c3^7z
private static class MaxHeap{ \o^+'4hq<5
%;<FfS
void init(int[] data){ c_iF S
this.queue=new int[data.length+1]; \c]/4C +/
for(int i=0;i queue[++size]=data; 1$^{Uma
fixUp(size); 8p FSm>
} )"1D-Bc\Q
} <ygO?m{
"CaVT7L
private int size=0; pQp}HD!-
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private int[] queue; H.9J}k1S
gor6c3i
public int get() { ZD,l2DQ?
return queue[1]; 8[DD=[&
} 4MM#\
Dihk8qJ/6
public void remove() { Rwr0$_A
SortUtil.swap(queue,1,size--); F4}Zl
fixDown(1); _ehU:3L`s
} w Bl=]BW!%
file://fixdown +o/q@&v;Ax
private void fixDown(int k) { $d"6y
int j; 6+It>mnR
while ((j = k << 1) <= size) { ~DJ/sY2/
if (j < size %26amp;%26amp; queue[j] j++; ;'h7 j*6
if (queue[k]>queue[j]) file://不用交换 r=9*2X#
break; %=]{~5f>
SortUtil.swap(queue,j,k); L^=>)\R2$[
k = j; u7/M>YJ`T
} {[$p}#7Y
} EgY]U1{
private void fixUp(int k) { J^v_VZ3
while (k > 1) { }$7Hf+G
int j = k >> 1; {*|yU"
if (queue[j]>queue[k]) %:??QD*
break; &~k/G
SortUtil.swap(queue,j,k); V=YK3){>A
k = j; tSg#2
} `S!`=26Z!
} +Kk6|+5u
}{lOsZA
} B82A:t)
FSM~Rl
} toQn]MT
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SortUtil： =Xp3UNXg
#[A/zH|xvV
package org.rut.util.algorithm; 9A6ly9DIS
83S],L
import org.rut.util.algorithm.support.BubbleSort; iw#luHcJ
import org.rut.util.algorithm.support.HeapSort; I*#~@:4*
import org.rut.util.algorithm.support.ImprovedMergeSort; pG" 4qw
import org.rut.util.algorithm.support.ImprovedQuickSort; pZH bj2~
import org.rut.util.algorithm.support.InsertSort; $)'{+1
import org.rut.util.algorithm.support.MergeSort; vOqYt42
import org.rut.util.algorithm.support.QuickSort; ^iGIF~J9
import org.rut.util.algorithm.support.SelectionSort; GxvVh71zP
import org.rut.util.algorithm.support.ShellSort; @}FRiPo6
S`J_}>
/** BFMM6-Ve
* @author treeroot VC.r
* @since 2006-2-2 E J 9A 4B
* @version 1.0 MM97$
*/ v!x=fjr<
public class SortUtil { o$Jk27
public final static int INSERT = 1; /O8'8sL5
public final static int BUBBLE = 2; %TLAn[LW(
public final static int SELECTION = 3; uU<Yf5
public final static int SHELL = 4; {!-w|&bF
public final static int QUICK = 5; D.HAp+lx
public final static int IMPROVED_QUICK = 6; eo@:@O+bm
public final static int MERGE = 7; ^lQej%
public final static int IMPROVED_MERGE = 8; t$}+oCnkv
public final static int HEAP = 9; m,*f6g
0[PP-]JS
public static void sort(int[] data) { H(0d(c1s
sort(data, IMPROVED_QUICK); Vbwbc5m}
} -5Ccuk>6
private static String[] name={ 0AaN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >8RIMW2
}; }$b/g
/WM : Bj
private static Sort[] impl=new Sort[]{ >CYg\vas!
new InsertSort(), i4->XvC
new BubbleSort(), au GN~"n^
new SelectionSort(), (OJ}|*\e
new ShellSort(), @ #V31im"N
new QuickSort(), -8EdTc@
new ImprovedQuickSort(), 4ba1c
new MergeSort(), #Uudx~b
new ImprovedMergeSort(), l]%|w]i\
new HeapSort() //WgK{Mt
}; |o+vpy
mhcJ0\@_
public static String toString(int algorithm){ <1hwXo
return name[algorithm-1]; KKOu":b
} GM@TWwG-B
4=1lyw
public static void sort(int[] data, int algorithm) { .fZv H
impl[algorithm-1].sort(data); bi,%QZZ
} uH]^/'8vBd
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public static interface Sort { GA;E (a
public void sort(int[] data); |ejrE,~1vb
} >f_D|;EV
ma-|L3 #
public static void swap(int[] data, int i, int j) { ,@<-h* m
int temp = data; }3+q}_3
data = data[j]; d`^@/1tO
data[j] = temp; U;;Har
} Qi[T!1
} 'dBzv>ngD