[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; XnCrxj
} Il&}4#:
int i1=l; <Z6tRf;B
int i2=mid+1; JMa[Ulz
for(int cur=l;cur<=r;cur++){ +&:?*(?Q
if(i1==mid+1) tq^d1b(j4
data[cur]=temp[i2++]; y!;PBsU%Sx
else if(i2>r) Q[U_ 0O,A9
data[cur]=temp[i1++]; ^%<t^sE
else if(temp[i1] data[cur]=temp[i1++]; YKZk/m&H
else n$S`NNO{]
data[cur]=temp[i2++]; |>2IgTh1a
} ^& R H]q
} iH#b"h{w
NX5A{
} 5_}e?T&s
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改进后的归并排序: {g7[3WRy
tgX},OU^
package org.rut.util.algorithm.support; xO<$xx
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import org.rut.util.algorithm.SortUtil; eyLVu.
t=;84lA
/** EC6Q<&]Iw
* @author treeroot ?(!<m'jEy
* @since 2006-2-2 ctzaqsr
* @version 1.0 .PhH|jrCW^
*/ q:9#Vcw
public class ImprovedMergeSort implements SortUtil.Sort { jW G=k#WN
/W,K% s]
private static final int THRESHOLD = 10; i(k]}Di:
8sV_@<l<X
/* l6C^,xU~IX
* (non-Javadoc) vFL\O
* <R?_Yjsw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Wm4JmX%
*/ kK]^q|vb6
public void sort(int[] data) { {D(_"
int[] temp=new int[data.length]; _E{hB
mergeSort(data,temp,0,data.length-1); 'xC83}!k
} :gNTQZR
!QB(M@1
private void mergeSort(int[] data, int[] temp, int l, int r) { j9=QOq
int i, j, k; h]#wwJF
int mid = (l + r) / 2; ;BR`}~m
if (l == r) ( _{\tgSm
return; Nm0kMq|h
if ((mid - l) >= THRESHOLD) $6c8<!B_
mergeSort(data, temp, l, mid); UBUZ}ZIbN
else '~1uJ0H
insertSort(data, l, mid - l + 1); G(puC4 "&
if ((r - mid) > THRESHOLD) $=?CW(
mergeSort(data, temp, mid + 1, r); _l`s}yC
else \y-Lt!}
insertSort(data, mid + 1, r - mid); -F+dRzxH
{ER%r'(4Z
for (i = l; i <= mid; i++) { 9*@Kl`\
temp = data; %mhnd):
} 2#n4t2p
for (j = 1; j <= r - mid; j++) { 0ang^v;q
temp[r - j + 1] = data[j + mid]; u= |hRTD=
} 8%UI<I,
int a = temp[l]; S)@95pb
int b = temp[r]; 9M)N2+hkZ
for (i = l, j = r, k = l; k <= r; k++) { :(,Eq?
if (a < b) { *j,5TO-j
data[k] = temp[i++]; !,*#e
a = temp; 0Wf,SYx`s
} else { B}.G(-u?7
data[k] = temp[j--]; He4sP`&I
b = temp[j]; :eK;:pN
} n')#]g0[
} qp-/S^%
} JNzNK.E!m-
8 0>qqz
/** "tgaFtC=w
* @param data Vo%MG.IPB
* @param l t(4%l4i;X
* @param i %bnDxCj"
*/ xGQ958@
private void insertSort(int[] data, int start, int len) { =o5ZcC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XD5z+/F<"0
} Azrc+k
} &)Fp
} p7Yej(B
} qA<PF+f
Q"UQv<
堆排序： Efsfuv
S6 F28 d[j
package org.rut.util.algorithm.support; eKlh }v
zof>S>5>R7
import org.rut.util.algorithm.SortUtil; E3#}:6m
I=VPw5"E
/** sKhX0,s&
* @author treeroot `z$<1QT
* @since 2006-2-2 Be{7Rj v
* @version 1.0 DWep5$>&K
*/ $X~4J
public class HeapSort implements SortUtil.Sort{ C7`FM@z
sgDlT=c'
/* (non-Javadoc) j_E$C.XU{g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Slc6$
*/ J7BfH,o
public void sort(int[] data) { q<rB(j-(
MaxHeap h=new MaxHeap(); D+/27#
h.init(data); 83UIH0(
for(int i=0;i h.remove(); ir<HC 'D[
System.arraycopy(h.queue,1,data,0,data.length); ]3<k>?
} |q5R5mQ
AD4KoT&
private static class MaxHeap{ 08&DP^NS
Bry\"V"'g
void init(int[] data){ xtyzy@)QL
this.queue=new int[data.length+1]; @cNX\$J
for(int i=0;i queue[++size]=data; Dh0`t@
fixUp(size); Vd[[<
} +1Oi-$ 2-
} }3cOZd_,t
l|[cA}HtB
private int size=0; 4f<%<Z
f{[U->#^
private int[] queue; bNR}Mk]?
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public int get() { Sc;WraEn2
return queue[1]; l9XK;0R9
} *4Cq,o`o>
Q*mzfsgr
public void remove() { 2xH9O{
SortUtil.swap(queue,1,size--); [>+(zlK"
fixDown(1); `<2y [<y
} Esw#D90q
file://fixdown #*;(%\q}
private void fixDown(int k) { >}h/$bU
int j; Rm 1obP
while ((j = k << 1) <= size) { Ub%+8M
if (j < size %26amp;%26amp; queue[j] j++; #Yi,EwD
if (queue[k]>queue[j]) file://不用交换 7Xm7{`jH
break; EO$_]0yI;_
SortUtil.swap(queue,j,k); Fku9hB
k = j; .?9+1.`
} d paZ6g
} _, /m
private void fixUp(int k) { Z3Os9X9p
while (k > 1) { y% =nhV
int j = k >> 1; Oz!#);v
if (queue[j]>queue[k]) h|"98PI
break; 0l!%}E
SortUtil.swap(queue,j,k); ]kx)/n-K
k = j; EAp6IhW{
} q[1:h
} oHdss;q
2628 c`
} C"_f3[Z
h"cLZM:6
} W+V#z8K
\ Xow#@[
SortUtil： U8kH'OD
kVE% "
package org.rut.util.algorithm; (nfra,'
+ia F$
import org.rut.util.algorithm.support.BubbleSort; ^%wj6
import org.rut.util.algorithm.support.HeapSort; iX qB-4"
import org.rut.util.algorithm.support.ImprovedMergeSort; H[?~u+
import org.rut.util.algorithm.support.ImprovedQuickSort; IO~d.Ra
import org.rut.util.algorithm.support.InsertSort; h[72iVn
import org.rut.util.algorithm.support.MergeSort; T1m'+^?"
import org.rut.util.algorithm.support.QuickSort; 3/mVdU?U
import org.rut.util.algorithm.support.SelectionSort; p*)RP2
import org.rut.util.algorithm.support.ShellSort; q/~U[.C
~fB}v
/** aG;6^$H~
* @author treeroot @=q,,t$r
* @since 2006-2-2 mz@`*^7?
* @version 1.0 w#g0nV"X6
*/ #<|5<U
public class SortUtil { Vc|r(lM
public final static int INSERT = 1; Va,M9)F
public final static int BUBBLE = 2; ZeD;
public final static int SELECTION = 3; zvB!=
public final static int SHELL = 4; 2P`QS@v0a=
public final static int QUICK = 5; {^gbS
public final static int IMPROVED_QUICK = 6; x;"!
public final static int MERGE = 7; 2MwRjh_
public final static int IMPROVED_MERGE = 8; -]c5**O}
public final static int HEAP = 9; 'bp*hqG[
5\1Z"?
public static void sort(int[] data) { R>H*MvN
sort(data, IMPROVED_QUICK); gv$6\1
} l4u@0;6P
private static String[] name={ |g]TWKc*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xMJF1O?3
}; X||Z>w}v
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private static Sort[] impl=new Sort[]{ JmdXh/X
new InsertSort(), uV.3g 1m
new BubbleSort(), iOz<n z
new SelectionSort(), bf2R15|t5`
new ShellSort(), "8|y
new QuickSort(), M"[s5=:Lo
new ImprovedQuickSort(), o<P@:}K
new MergeSort(), b3}928!D-@
new ImprovedMergeSort(), RbX!^v<0f6
new HeapSort() s mub> V
}; Ry*NRP;
CBdSgHA3>
public static String toString(int algorithm){ rm2"pfs
return name[algorithm-1]; ZxkX\gl91
} rZ<0ks
dgPJte%i
public static void sort(int[] data, int algorithm) { |`T3H5X>
impl[algorithm-1].sort(data); -'+|r]
} en>d T
n m(yFX?=
public static interface Sort { *>%34m93
public void sort(int[] data); tVQfR*=
} i.2O~30ST
?TLEZlB2"
public static void swap(int[] data, int i, int j) { _`Ey),c_
int temp = data; awuUaE
data = data[j]; -H~g+i*J
data[j] = temp; quk~z};R>\
} H4 Y7p
} .E!7}O6