[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; 4ioNA/E
} d#Wn[h$"
int i1=l; ;]u1~
int i2=mid+1; w6v1 q:20
for(int cur=l;cur<=r;cur++){ KM@`YV_"g
if(i1==mid+1) yh$ ~*UV
data[cur]=temp[i2++]; :z124Zf
else if(i2>r) WiwwCKjSa
data[cur]=temp[i1++]; i*b4uHna
else if(temp[i1] data[cur]=temp[i1++]; SmvwhX
else 10TSc j
data[cur]=temp[i2++]; bY&YSlO
} 'F6#l"~/
} v6(,Ax&
^EUQ449<p
} $"(3MnR
EKJH_!%
改进后的归并排序: BDnBBbBrz
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package org.rut.util.algorithm.support; i&5!9m`Cw
9Mut p4#
import org.rut.util.algorithm.SortUtil; nFVbQa~
14;Av{Xt
/** '9Qd.q7s|b
* @author treeroot E.Pje@d
* @since 2006-2-2 :e52hK1[T
* @version 1.0 -ca]Q|m8
*/ Wd1 IX^7C%
public class ImprovedMergeSort implements SortUtil.Sort { tUn&z?7bF
>sB=\
private static final int THRESHOLD = 10; 739l%u }<
P@-R5GK
/* F^[M
* (non-Javadoc) ^>t-v
* YU*46 hA1B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jCam,$oE
*/ 5Bzuj`
public void sort(int[] data) { .v$ue`
int[] temp=new int[data.length]; IcO9V<Q|
mergeSort(data,temp,0,data.length-1); ^JiaR)#r
} :v''"+\
=/M$ <+
private void mergeSort(int[] data, int[] temp, int l, int r) { zww?
int i, j, k; R^F7a0"
int mid = (l + r) / 2; ?Of{c,2 .
if (l == r) W[@"H1bVH
return; ?BXP}]
if ((mid - l) >= THRESHOLD) t>m8iS>
mergeSort(data, temp, l, mid); #r-j.f}yx
else d#RF0,Y9
insertSort(data, l, mid - l + 1); 38OIFT
if ((r - mid) > THRESHOLD) Z={UM/6w
mergeSort(data, temp, mid + 1, r); OME!W w
else #a/n5c&6/
insertSort(data, mid + 1, r - mid); G >I.
5Q2TT $P
for (i = l; i <= mid; i++) { <7@mg/T
temp = data; x Q@&W;
} p]X!g
for (j = 1; j <= r - mid; j++) { 4Q&Xb <
temp[r - j + 1] = data[j + mid]; ^p'D<!6sK
} F%Ro98?{
int a = temp[l]; _+0uju?o}
int b = temp[r]; eimA *0Cq
for (i = l, j = r, k = l; k <= r; k++) { ".Tf<F
if (a < b) { "`y W]v
data[k] = temp[i++]; m,xy4
a = temp; *S,v$ VX
} else { ,S7~=S
data[k] = temp[j--]; x)%% 5
b = temp[j]; ghE?8&@ iq
} ?tW%"S^D
} 6kgCS{MZ
} ~`tJvUo0
)1X' W
/** weTK#O0@v
* @param data e2,<,~_K6
* @param l \emT:Frb
* @param i ;D%5 nnr
*/ 0e[ tKn(
private void insertSort(int[] data, int start, int len) { iT)2 ?I6!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mmh nw(/
} \" 5F;J
} !nZI? z;
} a3DoLq"/
} W]C_oh
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堆排序： 6x`\ J2x
od|N-R
package org.rut.util.algorithm.support; _Ct@1}aa4x
Q&:92f\y
import org.rut.util.algorithm.SortUtil; =rs=8Ty?S
@k#z&@b
/** H>@JfYZ0
* @author treeroot "!w[U{
* @since 2006-2-2 1+.y,}F6b
* @version 1.0 * wQZ'
*/ q/aL8V<"z
public class HeapSort implements SortUtil.Sort{ {HE.mHy
_KT]l./
/* (non-Javadoc) >Gw%r1)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CU} q&6h
*/ [hvig$L
public void sort(int[] data) { : .UX[!^
MaxHeap h=new MaxHeap(); Wr}a\}R
h.init(data); :IOn`mRYu
for(int i=0;i h.remove(); 7,&3=R<
System.arraycopy(h.queue,1,data,0,data.length); z}Mb4{d1
} '/]fZ|
4)c"@Zf
private static class MaxHeap{ 0t/z"
#o}{cXX#
void init(int[] data){ CC]@`R5
this.queue=new int[data.length+1]; Is#v6:#^
for(int i=0;i queue[++size]=data; .DM1Knj
fixUp(size); 2#Q"@
} l[!C-Tq
} NjCLL`?f
FSXKH{Z
private int size=0; cl9;2D"Zm!
5y 'ycTjY
private int[] queue; oM? C62g\
Fg}5V,
public int get() { FB^dp}
return queue[1]; {0m[:af&
} E<fwl1<88
tpy:o(H
public void remove() { ES2d9/]p-
SortUtil.swap(queue,1,size--); o*5e14W(:
fixDown(1); G~mB=]
} 6iAc@
file://fixdown t]YLt ,
private void fixDown(int k) { "}y3@ M^
int j; l1.Aw|'D
while ((j = k << 1) <= size) { P\G C8KV]
if (j < size %26amp;%26amp; queue[j] j++; +T8XX@#
if (queue[k]>queue[j]) file://不用交换 l{7Dv1[Ss
break; p|O-I&Xd
SortUtil.swap(queue,j,k); Wb-'E%K
k = j; 1:~m)"?I_^
} 1(\I9L&J
} ]nr BmKB
private void fixUp(int k) { }od7YL
while (k > 1) { j]]ziz,E
int j = k >> 1; %RR|QY*
if (queue[j]>queue[k]) j2v[-N4 {J
break; '\vmfp=
SortUtil.swap(queue,j,k); ThiPT|5u
k = j; #I@[^^Vw
} g he=mQ-
} ,-NLUS "w
YH'.Yj2
} :!*;0~#
uu46'aT
} yl]Cm?8
Ss#{K;
SortUtil： JqV<A3i
J*4_|j;Z-E
package org.rut.util.algorithm; yl;$#aZB
mjr{L{H=?+
import org.rut.util.algorithm.support.BubbleSort; ."@a1_F|
import org.rut.util.algorithm.support.HeapSort; Y_iF$m/R
import org.rut.util.algorithm.support.ImprovedMergeSort; e+[J[<8
import org.rut.util.algorithm.support.ImprovedQuickSort; !5 :1'$d]H
import org.rut.util.algorithm.support.InsertSort; \iTPJcb5
import org.rut.util.algorithm.support.MergeSort; p]IhQnj2
import org.rut.util.algorithm.support.QuickSort; 'rx,f
import org.rut.util.algorithm.support.SelectionSort; ^Y*.Ktp,o
import org.rut.util.algorithm.support.ShellSort; o9SfWErZ
b}{9 :n/SC
/** >|&OcU
* @author treeroot ba:du |Ec
* @since 2006-2-2 RgzSaP;;
* @version 1.0 2|H'j~
*/ U3iyuE
public class SortUtil { ng)yCa_Ny
public final static int INSERT = 1; JdNPfkOF
public final static int BUBBLE = 2; U~`^Y8UF
public final static int SELECTION = 3; w5JC2
public final static int SHELL = 4; gJcL{]
public final static int QUICK = 5; O5n]4)<
public final static int IMPROVED_QUICK = 6; BE@H~<E J
public final static int MERGE = 7; RBojT
public final static int IMPROVED_MERGE = 8; n7YWc5:CaL
public final static int HEAP = 9; OG$iZiuf
E$zq8-p|
public static void sort(int[] data) { {(:)
sort(data, IMPROVED_QUICK); Ku,A}5-6
} :zy'hu;
private static String[] name={ rQ-z2Pw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g,]5&C T3v
}; -VT?/=Y s
zpQ/E
private static Sort[] impl=new Sort[]{ fi@+swfc
new InsertSort(), kFs kn55
new BubbleSort(), UDqKF85H
new SelectionSort(), iKTU28x
new ShellSort(), _=$!T;}lE
new QuickSort(), 4Tw1gas.
new ImprovedQuickSort(), cO?"
new MergeSort(), R$,iDv.jI
new ImprovedMergeSort(), @V CQ4X7T
new HeapSort() ^)]*10
}; ${:$jX[
9 7qS.Z27
public static String toString(int algorithm){ s~ZC!-[;
return name[algorithm-1]; aV%rq9Tp
} *LQY6=H
uWT&`m_(2
public static void sort(int[] data, int algorithm) { w)>z3Lm
impl[algorithm-1].sort(data); ![C$H5
} &l*dYzqq
QnAf A%
public static interface Sort { 5}aC'j\
public void sort(int[] data); !d@`r1t
} )/^$JYz
&x5ZEe4
public static void swap(int[] data, int i, int j) { 'aWZ#GS*
int temp = data; oYM3$.{E
data = data[j]; fmN)~-DV9`
data[j] = temp; W3j|%
} h>Pg:*N,(
} $ T_EsnN