[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; '&gUAt
} Dk")/ ib
int i1=l; B=X_c5
int i2=mid+1; c$u#U~~
for(int cur=l;cur<=r;cur++){ )liNjY@
if(i1==mid+1) =M4wP3V/
data[cur]=temp[i2++]; {S%;By&[
else if(i2>r) uV'C_H
data[cur]=temp[i1++]; j *N^.2
else if(temp[i1] data[cur]=temp[i1++]; n4"xVDL
else i !SN"SY
data[cur]=temp[i2++]; LA6Ik_-F
} $m+Pl[s
} Tn38]UL
8jLO-^X<<
} 3rX8H`R
)D]LPCd[
改进后的归并排序: C8:y+pH_U;
[E}pU8.t6
package org.rut.util.algorithm.support; pf=CP%L
!+Sd%2o
import org.rut.util.algorithm.SortUtil; *iPBpEWC
5hAs/i9_
/** IUh)g1u41O
* @author treeroot 5y~B/.YY
* @since 2006-2-2 )$2h:dw_
* @version 1.0 |l?*' =
*/ . vea[
public class ImprovedMergeSort implements SortUtil.Sort { n{c-3w.uD
4'`*Sce}
private static final int THRESHOLD = 10; b3-+*5L
4&`d$K
/* =VZ0+Yl
* (non-Javadoc) zn\$6'"
* lJ4/bL2I/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VZA>ErB
*/ S?~/ V]
public void sort(int[] data) { kAoh#8=
int[] temp=new int[data.length]; @Z9>E+udQ
mergeSort(data,temp,0,data.length-1); ?T[K{t;~jo
} ` B+Pl6l)F
l-[5Zl;"
private void mergeSort(int[] data, int[] temp, int l, int r) { *eUxarI
int i, j, k; ~$4!C'0
int mid = (l + r) / 2; Vvl8P|x.<
if (l == r) I{u+=0^Y
return; 7{ QjE
if ((mid - l) >= THRESHOLD) DEKO]i
mergeSort(data, temp, l, mid); ~NO'8Mr
else sRGIHT#
insertSort(data, l, mid - l + 1); ]LSlo593
if ((r - mid) > THRESHOLD) ]i'gU(+;`
mergeSort(data, temp, mid + 1, r); LBhDP5qF
else RsP^T:M}$
insertSort(data, mid + 1, r - mid); &-`a`
8d\/
for (i = l; i <= mid; i++) { i}ti
temp = data; 'Z^KpW
} 7C^W<SUo
for (j = 1; j <= r - mid; j++) { ",Fqpu&M
temp[r - j + 1] = data[j + mid]; AaJnRtBS~
} ~`Rooh3m
int a = temp[l]; _~E_#cNn
int b = temp[r]; 1`EkN0iZ
for (i = l, j = r, k = l; k <= r; k++) { k|_LF[*Z
if (a < b) { * n>YS
data[k] = temp[i++]; ( ESmP
a = temp; i.>d#S
} else { ~C;gEE-
data[k] = temp[j--]; 1cPjgBxv#
b = temp[j]; hc5iIJ]
} hk+"c^g:j<
} EN2/3~syO-
} ]AdL
F%e5j9X`
/** zvP>8[
* @param data }q[IhjD%
* @param l {(qH8A
* @param i RB/;qdqR
*/ `}&}2k
private void insertSort(int[] data, int start, int len) { -#"7F:N1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N'RUtFqj
} :jioF{,
} Y^J/jA0\B
} $ &fm^1
} "+KAYsVtU
sBm/9vu
堆排序： t_ZWd#x+;
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package org.rut.util.algorithm.support; \{M/Do:
&IgH]?t
import org.rut.util.algorithm.SortUtil; gpzZs<ST
9jTm g%
/** ?;)F_aHp
* @author treeroot lC(g&(\{
* @since 2006-2-2 .LHzaeJCX
* @version 1.0 "?TKz:9r
*/ piKR*|F
public class HeapSort implements SortUtil.Sort{ 9\D0mjn=l
,2_!hm/
/* (non-Javadoc) "jG-)k`a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >^hy@m
*/ &26H
public void sort(int[] data) { 2k3yf_N
MaxHeap h=new MaxHeap(); u9R:2ah&K
h.init(data); rCdf*;
for(int i=0;i h.remove(); P_3U4J
System.arraycopy(h.queue,1,data,0,data.length); &24z`ZS[w6
} s.G6?1VXlY
9,zM.g9Qv
private static class MaxHeap{ CHRO9
R~&i8n.
void init(int[] data){ K~JXP5`(
this.queue=new int[data.length+1]; L=WB'*N
for(int i=0;i queue[++size]=data; Kp_^ 2V?
fixUp(size); D&r2k 9
} M~&X?/8
} l]o)KM<
tug\X
private int size=0; /i)1BaF
FI$#x%A
private int[] queue; ]/{987
Du2v,n5@
public int get() { 15^5yRXC
return queue[1]; Ho:X.Z9A^
} Z'I0e9Jw
dECH/vJ^
public void remove() { B=`"!?we
SortUtil.swap(queue,1,size--); xz$S5tgDQK
fixDown(1); ';z5]O~
} W^^}-9
file://fixdown )4P5i b
private void fixDown(int k) { Z/ypWoV(
int j; WrGz`
while ((j = k << 1) <= size) { SAEV "
if (j < size %26amp;%26amp; queue[j] j++; 8?7gyp!k_f
if (queue[k]>queue[j]) file://不用交换 4{r_EV[(
break; U@$=0*
SortUtil.swap(queue,j,k); nBVknyMFNF
k = j; Hf'yRKACj
} tyLR_@i%%
} fii\&p7z
private void fixUp(int k) { `(9B(&t^,
while (k > 1) { :tA|g
int j = k >> 1; [}OL@num
if (queue[j]>queue[k]) S}hg*mWn{$
break; \O7?!i
SortUtil.swap(queue,j,k); Y{8L ~U:
k = j; U&|$B|[
} CKTD27})
} ^gdg0y!5~
(pjmE7`"P
} j{nkus2
Mlpq2I_x
} y{eZrX|
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SortUtil： 8elT/Wl
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package org.rut.util.algorithm; ~%Ws"1
rr[9sk`^H
import org.rut.util.algorithm.support.BubbleSort; Xm`K@hJ@
import org.rut.util.algorithm.support.HeapSort; f-\l<o(
import org.rut.util.algorithm.support.ImprovedMergeSort; ^saJfr x
import org.rut.util.algorithm.support.ImprovedQuickSort; Oed&B
import org.rut.util.algorithm.support.InsertSort; Lh &L5p7
import org.rut.util.algorithm.support.MergeSort; *TuoC5
import org.rut.util.algorithm.support.QuickSort; _W: S>ij(
import org.rut.util.algorithm.support.SelectionSort; b)u9#%Q
import org.rut.util.algorithm.support.ShellSort; OD"eB?
K@{jY\AZNx
/** (D8'qx-M
* @author treeroot p;n)YY$
* @since 2006-2-2 jkNZv. )p
* @version 1.0 ^;YD3EZw
*/ mId{f
public class SortUtil { 2597#O
public final static int INSERT = 1; GX_Lxc_<f
public final static int BUBBLE = 2; e_6 i896
public final static int SELECTION = 3; ej<z]{`05
public final static int SHELL = 4; d1j v>tu
public final static int QUICK = 5; ,`|KNw5
public final static int IMPROVED_QUICK = 6; wH#k~`M
public final static int MERGE = 7; )K2n!Fbd
public final static int IMPROVED_MERGE = 8; !wrl.A/P
public final static int HEAP = 9; q@(N 38D
TF^]^XS'
public static void sort(int[] data) { x@k9]6/zs
sort(data, IMPROVED_QUICK); HRw,D=
} E_yh9lk
private static String[] name={ YT:5J%"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3S5QqAm
}; i([A8C_A
fg1 zT~
private static Sort[] impl=new Sort[]{ |n&6z
new InsertSort(), )US)-\^
new BubbleSort(), L"b5P2{c
new SelectionSort(), L]tyL)
new ShellSort(), ):[[Ch_
new QuickSort(), da<1,hF
new ImprovedQuickSort(), O>>8%=5Q
new MergeSort(), !9N%=6\
new ImprovedMergeSort(), >ab=LDoM
new HeapSort() PHOW,8)dZh
}; g+CHF?O
eeX>SL5'i
public static String toString(int algorithm){ UmJg-~
return name[algorithm-1]; ~gAx
} Gce_gZH7{
%q!nTGU~
public static void sort(int[] data, int algorithm) { /;>EyWW
impl[algorithm-1].sort(data); bVrvb`0
} ]zm6;/S
%$}iM<
public static interface Sort { l;C_A;y\
public void sort(int[] data); _8`|KY
} NdZ: 7
5u!cA4e"
public static void swap(int[] data, int i, int j) { 1hN! 2Y:
int temp = data; [+1 i$d
data = data[j]; <*\J 6:^n
data[j] = temp; *5NffiA}-
} ])JJ`Z8Bk
} ~+g5?y