[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; B~:yM1f@u4
} Mnranhe>G
int i1=l; 1(;{w+nM
int i2=mid+1; /3)\^Pof
for(int cur=l;cur<=r;cur++){ 8cO?VH,nk
if(i1==mid+1) WSpF/Wwc
data[cur]=temp[i2++]; &l cfX\y
else if(i2>r) Pz50etJ
data[cur]=temp[i1++]; NFVu~t
else if(temp[i1] data[cur]=temp[i1++]; 3?E7\\/R
else +xuv+mo
data[cur]=temp[i2++]; "nr?WcA
} !WXV1S
} 0^*,E/}P&
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} A"r<$S6
7bYwh8
改进后的归并排序: pbKmFweq
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package org.rut.util.algorithm.support; n\;;T1rM
q=^;lWs4
import org.rut.util.algorithm.SortUtil; cQ1[x>OcU
8}yrsF#
/** =9TwBr.CJ
* @author treeroot = V')}f~C
* @since 2006-2-2 Uic
* @version 1.0 8$c)]Bv
*/ iUz?mt;k
public class ImprovedMergeSort implements SortUtil.Sort { .S:(O+#Gm
,i6U*
private static final int THRESHOLD = 10; @V>]95RX
M2V`|19Q
/* Z>UM gu3c
* (non-Javadoc) C_3,|Zq?|
* B _ J2Bf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XRV~yBIS
*/ qbQdxKk
public void sort(int[] data) { Mk9J~'C_
int[] temp=new int[data.length]; G/~b(V;>
mergeSort(data,temp,0,data.length-1); cxQ %tL+S&
} E3{kH 7_'\
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private void mergeSort(int[] data, int[] temp, int l, int r) { ) iV^rLwL
int i, j, k; pm9sI4S
int mid = (l + r) / 2; 6Hy_7\$(-
if (l == r) u|\?6fz
return; ;;C2t&(
if ((mid - l) >= THRESHOLD) &Cm]*$?
mergeSort(data, temp, l, mid); u(hJyo}
else GjN6Af~}
insertSort(data, l, mid - l + 1); nWK7*
if ((r - mid) > THRESHOLD) dK8dC1@,X;
mergeSort(data, temp, mid + 1, r); f;OB"p
else 3 _!MVT
insertSort(data, mid + 1, r - mid); =w:)AWZ
OTAe#]#
for (i = l; i <= mid; i++) { Q`;eI a6U
temp = data; ^B}q@/KV
} )J+A2>
for (j = 1; j <= r - mid; j++) { @Jqo'\~&
temp[r - j + 1] = data[j + mid]; O'@[f{
} Ejf5M\o
int a = temp[l]; `|v/qk7 ^?
int b = temp[r]; _I3v"d
for (i = l, j = r, k = l; k <= r; k++) { Lm<WT*@
if (a < b) { zMO#CZ t
data[k] = temp[i++]; 'n\PS,[1R
a = temp; oSjYp(h:
} else { 8GjETq%}
data[k] = temp[j--]; %.'oY%
b = temp[j]; xsy45az<ip
} > sQ&5-i
} to1r 88X
} Lp4F1H2t-
p8?"}
/** z[O*f#t
* @param data jffNA^e
* @param l )iK:BL*Nw
* @param i a<E9@
*/ -yBj7F|
private void insertSort(int[] data, int start, int len) { Zu>-y#Bw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;+#Nb/M
} 5v`lCu]
} Ho[]03
} lkR^2P
} V\]j^$
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堆排序： dV}]\8N
nII#uI/!q
package org.rut.util.algorithm.support; /& c2y=/'C
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import org.rut.util.algorithm.SortUtil; D@ !r?E`
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/** `R7dn/
* @author treeroot /(u? k%Q
* @since 2006-2-2 ]l+<-
* @version 1.0 sX3qrRY
*/ G)M! , Q
public class HeapSort implements SortUtil.Sort{ @#-\BQ;
v<<ATs%w
/* (non-Javadoc) SyT{k\[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 261? 8&c
*/ q4G$I?4
public void sort(int[] data) { W,H=K##6<
MaxHeap h=new MaxHeap(); h|`R[
h.init(data); {.[EXMX
for(int i=0;i h.remove(); mh`uvqY
System.arraycopy(h.queue,1,data,0,data.length); zxH<~2
} JP5en
R$A%Zh6
private static class MaxHeap{ |!7leL
suW|hh1/Ya
void init(int[] data){ 7#oq|5
this.queue=new int[data.length+1]; \.p; 4V&
for(int i=0;i queue[++size]=data; oSf`F1;)HQ
fixUp(size); ],~[^0
} $<C",&
} |%fNLUJ)
+RR6gAma}<
private int size=0; 72J=_d>+
Bt5 P][<
private int[] queue; :A:7^jrhi
!b4AeiL>w
public int get() { Qp)?wny4
return queue[1]; %zRuIDmv
} e6tU8`z
W&D{0i`y
public void remove() { &V SZ
SortUtil.swap(queue,1,size--); `d4xX@
fixDown(1); I.|b:c xN
} d)D!np=
file://fixdown 02tN=}Cj)
private void fixDown(int k) { bi+g=cS
int j; 0T#z"l<L
while ((j = k << 1) <= size) { j)@{_tv6;
if (j < size %26amp;%26amp; queue[j] j++; bwP@}(K
if (queue[k]>queue[j]) file://不用交换 Hg8 4\fA
break; H${LF.8
SortUtil.swap(queue,j,k); ?{^_z_,
k = j; p$'S\W|
} ;(Ug]U%3_
} lMvOYv
private void fixUp(int k) { % _E?3
while (k > 1) { d-+jb<C&
int j = k >> 1; 3c3;8h$k
if (queue[j]>queue[k]) b&&l
break; e7xBi!I)~
SortUtil.swap(queue,j,k); $KGMAg/H
k = j; VYkh@j
} pQ:^ ziwa3
} Z}uY%]
}" vxYB!h3
} ge GhM>G
eQu(3sYb
} P{6$".kIY
'!7>*<
SortUtil： >aO.a[AM
tSJ#
package org.rut.util.algorithm; 7UMZs7L$
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import org.rut.util.algorithm.support.BubbleSort; e,e(t7c?d
import org.rut.util.algorithm.support.HeapSort; kWZY+jyt P
import org.rut.util.algorithm.support.ImprovedMergeSort; B=a+cT
import org.rut.util.algorithm.support.ImprovedQuickSort; Gd%i?(U,R
import org.rut.util.algorithm.support.InsertSort; P>X[}
import org.rut.util.algorithm.support.MergeSort; '@.6Rd 8
import org.rut.util.algorithm.support.QuickSort; fe/;U=te
import org.rut.util.algorithm.support.SelectionSort; ,X^3.ILz
import org.rut.util.algorithm.support.ShellSort; S9Yzvq!(
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/** c#{lXS^
* @author treeroot ))|d~m
* @since 2006-2-2 yogavCD9b/
* @version 1.0 N<rq}^qo
*/ h8`On/Ur_8
public class SortUtil { A[+)PkR
public final static int INSERT = 1; );d07\V
public final static int BUBBLE = 2; w{*kbGB8s7
public final static int SELECTION = 3; qKfUm:7Q_
public final static int SHELL = 4; :6nD"5(
public final static int QUICK = 5; ^Qx?)(@
public final static int IMPROVED_QUICK = 6; UXBWCo;-
public final static int MERGE = 7; #MA6eE'R
public final static int IMPROVED_MERGE = 8; BrE#.g Jq
public final static int HEAP = 9; @@oJ@;
x!_5/
public static void sort(int[] data) { l|WFS
sort(data, IMPROVED_QUICK); >SDQ@63E?
} nKm# kb
private static String[] name={ 0 MK}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~6t!)QATnp
}; $VHIU1JjZ
) 1AAL0F\B
private static Sort[] impl=new Sort[]{ e n~m)r3&
new InsertSort(), Qf( A
new BubbleSort(), P_A@`eU0
new SelectionSort(), 1;(h0j
new ShellSort(), 6NX#=A
new QuickSort(), [ *Dj:A)V^
new ImprovedQuickSort(), @bA5uY!
new MergeSort(), 3UUdJh<~
new ImprovedMergeSort(), !{^kH;*u
new HeapSort() wmGcXBHt$
}; W\zZ&*8$
@G2# Z
public static String toString(int algorithm){ U)8yd,qG[%
return name[algorithm-1]; i6KfH\{N
} N5*Qnb8
nv_vFK
public static void sort(int[] data, int algorithm) { v](Y n)#
impl[algorithm-1].sort(data); x\G%
} m*]`/:/X[
$b|LZE\bU.
public static interface Sort { 9iG&9tB@
public void sort(int[] data); S#M8}+ZD,
} g}0K@z3
T$lV+[7
public static void swap(int[] data, int i, int j) { Z}$sY>E
int temp = data; SQ,-45@W
data = data[j]; j_2g*lQ7a
data[j] = temp; _+By=B.'
} M]PZwW8
} @6G)(NGD