[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; *XTd9E^tXq
} tVn?cS
int i1=l; |EE1S{!24m
int i2=mid+1; &|>~7(
for(int cur=l;cur<=r;cur++){ lv 8EfN
if(i1==mid+1) yQ2=d5'V`
data[cur]=temp[i2++]; :k/Xt$`
else if(i2>r) *V6| FU
data[cur]=temp[i1++]; 6$r\p2pi0
else if(temp[i1] data[cur]=temp[i1++]; }sXTZX
else 0\%g@j-aD
data[cur]=temp[i2++]; G>V6{g2Q
} 9wWBE<}>u
} SB\%"nnV
MoIh=rw
} D`LBv,n
v=N?(6T
改进后的归并排序: KMRPleF
y"q aa
package org.rut.util.algorithm.support; [r/zBF-.
"bo0O7InOV
import org.rut.util.algorithm.SortUtil; o:@Q1+p
Urr%SIakvM
/** L|'^P3#7`
* @author treeroot >pU9}2fpT
* @since 2006-2-2 }g}Eh>U
* @version 1.0 !a@)6or
*/ ,S-h~x
public class ImprovedMergeSort implements SortUtil.Sort { w"^h<]b
9"P|Csj
private static final int THRESHOLD = 10; dVQ[@u1,
X06Lr!-%
/* e,U:H~+]
* (non-Javadoc) ]Ox5F@
* .;?!I_`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eTuqK23
*/ UD.bb
public void sort(int[] data) { r`O Yq
int[] temp=new int[data.length]; 0*$w(*
mergeSort(data,temp,0,data.length-1); ?%s>a8w
} @?3f`l 9
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private void mergeSort(int[] data, int[] temp, int l, int r) { C ^Y\?2h1
int i, j, k; 8-2`S*
int mid = (l + r) / 2; 4V,.Oi
if (l == r) $GJT
return; x|6]+?l@6
if ((mid - l) >= THRESHOLD) wX,V:QE
mergeSort(data, temp, l, mid); <g[z jV9p
else %nZl`<M
insertSort(data, l, mid - l + 1); Z?axrGmg0
if ((r - mid) > THRESHOLD) hS]w A"\87
mergeSort(data, temp, mid + 1, r); ~G!JqdKJ0
else YlHP:ZW-cu
insertSort(data, mid + 1, r - mid); WK>F0xMs1
A lU^,X
for (i = l; i <= mid; i++) { ,;)ZF
temp = data; JWn26,
} fvkcJwkc
for (j = 1; j <= r - mid; j++) { Mbi]EZ
temp[r - j + 1] = data[j + mid]; *T5;dh (
} *G19fJ[5
int a = temp[l]; =S&`~+
int b = temp[r]; C?<pD+]b_
for (i = l, j = r, k = l; k <= r; k++) { Q.mJ7T~T
if (a < b) { /at7H!
data[k] = temp[i++]; tb3VqFx
a = temp; y0* rY
} else { d!,t_jM0
data[k] = temp[j--]; U.7fMc#
b = temp[j]; (`tRJWbdz
} :L[>!~YG_n
} aLO^>",
} PVCoXOqh
2{OR#v~
/** P6:C/B
* @param data /).{h'^Hq\
* @param l )kD/ 8
* @param i CKsVs.:u
*/ ]{>AU^=U
private void insertSort(int[] data, int start, int len) { 7{;it uqX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?"B]"%M&
} ,lyW'<~gA
} :D.0\.p
} z|l*5@p
} U ZM #O
R@vcS=m7
堆排序： %Sr+D{B
7},A.q
package org.rut.util.algorithm.support; )BP*|URc
K@D\5s|1|
import org.rut.util.algorithm.SortUtil; )#=J<OpG
]\$/:f-2
/** \/a6h
* @author treeroot {MUB4-@?F$
* @since 2006-2-2 r~4uIUE{
* @version 1.0 7u):J
*/ zzqJeIS
public class HeapSort implements SortUtil.Sort{ Uzu6>yT
[M?2axOC
/* (non-Javadoc) ahBqYAK9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V$^jlWdR
*/ {28|LwmL
public void sort(int[] data) { $XBK_ 5
MaxHeap h=new MaxHeap(); ?^}30V:E
h.init(data); TCtZ2 <'
for(int i=0;i h.remove(); %bW_,b
System.arraycopy(h.queue,1,data,0,data.length); k+3qX'fd
} c'2d+*[
rqdwQ
private static class MaxHeap{ \@LTXH.
^J!q>KJs
void init(int[] data){ bx@l6bpQ
this.queue=new int[data.length+1]; V~J5x >O
for(int i=0;i queue[++size]=data; qQ&uU7,#
fixUp(size); Cs'LrUB?=U
} ZL MH~cc
} xmW~R*^
(\V i_
private int size=0; "q@m6fs
[K!9xM6
private int[] queue; Gr"CHz/
?1e{\XW
public int get() { 8[^'PIz
return queue[1]; QTV*m>D
} .n-#A
y8Va>ul"U
public void remove() { FL0uY0K
SortUtil.swap(queue,1,size--); yV30x9i!2
fixDown(1); I.2J-pu}
} |{jT+
file://fixdown sV^:u^
private void fixDown(int k) { ']]d-~:
int j; r~w.J+W
while ((j = k << 1) <= size) { 39pG-otJ
if (j < size %26amp;%26amp; queue[j] j++; L*nK> +
if (queue[k]>queue[j]) file://不用交换 k;WD[SV
break; /?\3%<vn
SortUtil.swap(queue,j,k); G dgL}"*F
k = j; FMfpjuHk
} t^t% >9o
} Wboh2:TH:
private void fixUp(int k) { k4TWfl^}9
while (k > 1) { D:)Wr, 26
int j = k >> 1; cs9^&N:w[
if (queue[j]>queue[k]) v9$!v^U"D
break; rr<E#w
SortUtil.swap(queue,j,k); >ZA=9v
k = j; bp1AN9~
} .8hI ad
} 2hE(h
C*9X;+S0J
} 1I+9?fa
2|1fb-AR
} &hCbXs=
'6KvB
SortUtil： <N<Q9}`V
+Y\:Q<eMFg
package org.rut.util.algorithm; I7f ^2
f)I5=Ijy(
import org.rut.util.algorithm.support.BubbleSort; tF2"IP.
import org.rut.util.algorithm.support.HeapSort; J 3!~e+wn
import org.rut.util.algorithm.support.ImprovedMergeSort; H'+7z-%G
import org.rut.util.algorithm.support.ImprovedQuickSort; {4"V)9o-1>
import org.rut.util.algorithm.support.InsertSort; 9g92eKS
import org.rut.util.algorithm.support.MergeSort; 2wf&jGHs
import org.rut.util.algorithm.support.QuickSort; 2[E wN!IZ
import org.rut.util.algorithm.support.SelectionSort; <v"o+
import org.rut.util.algorithm.support.ShellSort; !e$gp(4
5J5si<v25
/** / )0hsQs
* @author treeroot w =^.ICyb@
* @since 2006-2-2 UZZJtQt
* @version 1.0 9KSi-2?H
*/ _IH" SVub
public class SortUtil { WJ7|0qb
public final static int INSERT = 1; "fFSZ@,r
public final static int BUBBLE = 2; |WS)KR !
public final static int SELECTION = 3; QYJ EUC@
public final static int SHELL = 4; 2*Z2uV^
public final static int QUICK = 5; 8*ZsR)!
public final static int IMPROVED_QUICK = 6; rIb+c=|F
public final static int MERGE = 7; 49$P
public final static int IMPROVED_MERGE = 8; <LX\s*M)
public final static int HEAP = 9; J[ds.~ $
gN&i&%*!
public static void sort(int[] data) { pO]gf$
sort(data, IMPROVED_QUICK); 5dBftTv?
} %36x'Dn?
private static String[] name={ *zfgO pK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :yay:3qv
}; _03?XUKV
6&3,fSP
private static Sort[] impl=new Sort[]{ Bx\&7|,x
new InsertSort(), V0ze7tSG[f
new BubbleSort(), r8k(L{W
new SelectionSort(), $KHm5*;nd
new ShellSort(), qsj{0Go
new QuickSort(), p [O6
new ImprovedQuickSort(), !iXRt")
new MergeSort(), sXKkZ+2q
new ImprovedMergeSort(), lU WXXuO]
new HeapSort() LZ*8YNp1'
}; -@TY8#O#-
8\"<t/_ W
public static String toString(int algorithm){ ZbnAAbfKH
return name[algorithm-1]; Uqr>8|t?
} +`y(S}Z
+9)JtmoL
public static void sort(int[] data, int algorithm) { 6r7>nU&d
impl[algorithm-1].sort(data); 8tvmqe_G
} ZsGvv]P
:Mx
public static interface Sort { _0/unJl`
public void sort(int[] data); P5S]h
} %&ejO=r
$:ush"=f8^
public static void swap(int[] data, int i, int j) { nD wh
int temp = data; "CJVtO
data = data[j]; P8 X07IK
data[j] = temp; Ik G&
} A^U84kV=
} OV>&`puL