[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; `UFRv
} L,*KgLG
int i1=l; yT Pi/=G
int i2=mid+1; 6X(Yv2X&4%
for(int cur=l;cur<=r;cur++){ !w['@x.
if(i1==mid+1) +0U{CmH
data[cur]=temp[i2++]; zk8 o[4
else if(i2>r) rrK&XP&
data[cur]=temp[i1++]; f,9jK9/$
else if(temp[i1] data[cur]=temp[i1++]; (~F{c0\C
else O5HK2Xg,C
data[cur]=temp[i2++]; V5y8VT=I
} hC ^|
} 1iq,Gd-G.
Fy|tKMhnc
} *"V5j#F_
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改进后的归并排序: E"l&<U
n}9vAvC
package org.rut.util.algorithm.support; 6AeX$>k+
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import org.rut.util.algorithm.SortUtil; fj X~"U
ZD{%0uh
/** +]|aACt]
* @author treeroot hzIP ?0^E
* @since 2006-2-2 7.fpGzUM
* @version 1.0 WPVur{?<
*/ _jK
public class ImprovedMergeSort implements SortUtil.Sort { zoXCMBg[
&V5[Zj|]
private static final int THRESHOLD = 10; f}q4~NPn-
,]?Xf>
/* =[%ge{,t
* (non-Javadoc) :USN`"
* *Dr-{\9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 12 HBq8o
*/ `]^0lD=eI
public void sort(int[] data) { jf0D
int[] temp=new int[data.length]; OjxaA[$
mergeSort(data,temp,0,data.length-1); 2XhtK
} sg"J00
7Q,9j.
private void mergeSort(int[] data, int[] temp, int l, int r) { B6)d2O9C
int i, j, k; DQ7+
int mid = (l + r) / 2; USz|Rh
if (l == r) ;xFx%^M}br
return; 3`PPTG
if ((mid - l) >= THRESHOLD) j-wSsjLk
mergeSort(data, temp, l, mid); *yJCnoF
else oTOr,Mn0\6
insertSort(data, l, mid - l + 1); R;,&s!\<
if ((r - mid) > THRESHOLD) n4Fh*d ixg
mergeSort(data, temp, mid + 1, r); 8A/;a{
else Wyu$J
insertSort(data, mid + 1, r - mid); /]H6'
4|Z;EAFx
for (i = l; i <= mid; i++) { %H=d_Nm{
temp = data; C?@vBM}
} n_;qB7,,
for (j = 1; j <= r - mid; j++) { N3?hyR<T
temp[r - j + 1] = data[j + mid]; E$5)]<p! <
} dQ6:c7hp>D
int a = temp[l]; [{.e1s<EK
int b = temp[r]; Q 6djfEN>
for (i = l, j = r, k = l; k <= r; k++) { OiI[w8
if (a < b) { #<ppiu$
data[k] = temp[i++]; *Ag</g@ h
a = temp; AR9D;YfR~
} else { j)4:*R.Z]
data[k] = temp[j--]; +_Nr a
b = temp[j]; ,ra!O=d~0
} Sa5+_TW
} -dXlGOD+C
} ? b;_T,S[
6*`KC)a
/** 6&~8TH
* @param data qEvHrsw},
* @param l Rh!B4oB4
* @param i MfNxd 6w
*/ V1Yab#
private void insertSort(int[] data, int start, int len) { *_G(*yAe(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O;RsYs9
} +X[+SF)!
} o&]b\dV
} t']d_Vcza
} Ewjzm,2
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堆排序： H&K(,4u^
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package org.rut.util.algorithm.support; ]dzBm!u
#CKPNk c
import org.rut.util.algorithm.SortUtil; )!+M\fT
8U,VpuQ:
/** E(J@A'cX
* @author treeroot /.1c<!
* @since 2006-2-2 Dqss/vwV
* @version 1.0 %@/"BF;r
*/ +/u)/ey
public class HeapSort implements SortUtil.Sort{ E`#m0Q(8
RLBeti>
/* (non-Javadoc) x*}41;j}C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wf47Ulx
*/ A*d Pw.
public void sort(int[] data) { 32yGIRV
MaxHeap h=new MaxHeap(); gDHgXDD_b
h.init(data); ? yL3XB>
for(int i=0;i h.remove(); T(LqR?xOo
System.arraycopy(h.queue,1,data,0,data.length); WZz8VF
} Cjh0 .{
>eX&HSoy
private static class MaxHeap{ GM&< ?K1
HgH\2QL3&
void init(int[] data){ }xZR`xP(
this.queue=new int[data.length+1]; +NML>g#F~z
for(int i=0;i queue[++size]=data; ra87~kj<
fixUp(size); 8 xfn$
} Y0nnn
} pq8XCOllXx
;U7o)A;
private int size=0; 9a\H+Y~
Ziclw)
private int[] queue; ;bz|)[4/
"Zk# bQ2j
public int get() { <sU?q<MC
return queue[1]; WiDl[l"{9
} ckn0I
m\9R;$\
public void remove() { W 7xh
SortUtil.swap(queue,1,size--); zNAID-5K;
fixDown(1); h"~i&T h
} m9yi:zT%
file://fixdown ?'RB)M=Og7
private void fixDown(int k) { E?\&OeAkO
int j; n7Em t$Hi>
while ((j = k << 1) <= size) { R]dN-'U
if (j < size %26amp;%26amp; queue[j] j++; }XmrfegF
if (queue[k]>queue[j]) file://不用交换 ;/ wl.'GA
break; X<:B"rPuK
SortUtil.swap(queue,j,k); N, `q1B
k = j; @zu IR0Gr)
} TcW-pY<N
} X#;n Gq)5
private void fixUp(int k) { 4XL$I*;4
while (k > 1) { zL8Z8eh">
int j = k >> 1; "LwLTPC2
if (queue[j]>queue[k]) '6^+|1
break; \"]KF8c^_
SortUtil.swap(queue,j,k); }kJfTsFS
k = j; n~c<[
} E[Xqyp!<
} 0.pZlv
SB1j$6]OR7
} ;_$Q~X
m1pge4*
} )FLDCer
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SortUtil： r4YiXss
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package org.rut.util.algorithm; n*gr(S
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import org.rut.util.algorithm.support.BubbleSort; 6XP>qI,AJ
import org.rut.util.algorithm.support.HeapSort; "0*yD[2
import org.rut.util.algorithm.support.ImprovedMergeSort; w!/\dqjv
import org.rut.util.algorithm.support.ImprovedQuickSort; ^$FNu~|K
import org.rut.util.algorithm.support.InsertSort; 0H$6_YX4A
import org.rut.util.algorithm.support.MergeSort; tLH:'"{zx
import org.rut.util.algorithm.support.QuickSort; m!22tpb
import org.rut.util.algorithm.support.SelectionSort; % w\
import org.rut.util.algorithm.support.ShellSort; ]izrr
bEQy5AX
/** %rFR:w`{
* @author treeroot 3!l+)g
* @since 2006-2-2 }na0
* @version 1.0 X| !VjUH
*/ V8w7U:K
public class SortUtil { eeVDU$*e=
public final static int INSERT = 1; /"+CH\) E
public final static int BUBBLE = 2; 8ln{!,j;
public final static int SELECTION = 3; UC e{V]T
public final static int SHELL = 4; *|gY7Av*
public final static int QUICK = 5; HbI'n,+
public final static int IMPROVED_QUICK = 6; }4uHT.)
public final static int MERGE = 7; v9,<2
public final static int IMPROVED_MERGE = 8; H^Mfj!S
public final static int HEAP = 9; 5VS};&f
Ie<H4G5Vh
public static void sort(int[] data) { T\ *#9a
sort(data, IMPROVED_QUICK); A ".v+
} @d&JtA
private static String[] name={ ,59G6o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tG7F!um(
}; 6N49q-.Lg
TdU'L:<4l
private static Sort[] impl=new Sort[]{ c>|1%}"?
new InsertSort(), cp:U@Nh(
new BubbleSort(), 40e(p/Qka
new SelectionSort(), {4n
new ShellSort(), 4,,@o
new QuickSort(), 8t;vZ&
new ImprovedQuickSort(), _ez*dE%
new MergeSort(), @Ojbu@A
new ImprovedMergeSort(), t!8(IR
new HeapSort() +TZVx(Z&A
}; Af"p:;^z
v~*Co}0OB
public static String toString(int algorithm){ ~xa yGk
return name[algorithm-1]; ?v z[Zi
} a Xn:hn~O
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public static void sort(int[] data, int algorithm) { >]L\Bw
impl[algorithm-1].sort(data); C3K":JB
} !V'~<&
h]Y,gya[yk
public static interface Sort { |C"zK
public void sort(int[] data); |EGC1x]j=
} -k?K|w*X
6`h}#@ (
public static void swap(int[] data, int i, int j) { FUP0X2P
int temp = data; *@VS^JB
data = data[j]; )krBjF.$
data[j] = temp; B,q)<z6<
} ]Sey|/@D
} y$}o{VE{x