[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; ;W )Y OT
} hp50J
int i1=l; #powub
int i2=mid+1; z]y.W`i
for(int cur=l;cur<=r;cur++){ J7$5s
if(i1==mid+1) ,5p(T_V/
data[cur]=temp[i2++]; mfn,Gjt3O
else if(i2>r) LzKj=5'Y
data[cur]=temp[i1++]; ?#G$=4;i
else if(temp[i1] data[cur]=temp[i1++]; uk:(pZ-uJ
else 2DDtu[}
data[cur]=temp[i2++]; 'W^YM@
} .k%72ez
} ,.8KN<A2]'
vzAaxk%
} zV37$Hb
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改进后的归并排序: /)>3Nq4Zx
/ &5,3rU.G
package org.rut.util.algorithm.support; r.&Vw|*>
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import org.rut.util.algorithm.SortUtil; YQvD|x
K&]G3W%V
/** Hyl%mJ
* @author treeroot .p3,O6y2(F
* @since 2006-2-2 '3tCH)s
* @version 1.0 FIhk@TKa
*/ !sP{gi#=
public class ImprovedMergeSort implements SortUtil.Sort { wH&!W~M
f|c{5$N!
private static final int THRESHOLD = 10; `wEb<H
20h, ^
/* .f2bNnB~pP
* (non-Javadoc) Af2( 5]
* e{K 215
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -zgI_u9=EB
*/ hBUn \~z
public void sort(int[] data) { nPl?K:(
int[] temp=new int[data.length]; `i*E~'
mergeSort(data,temp,0,data.length-1); &i6mW8l
} n0 {i&[I~+
9wwqcx)3(
private void mergeSort(int[] data, int[] temp, int l, int r) { OX!tsARC@
int i, j, k; L|xbR#v
int mid = (l + r) / 2; sY Qk
if (l == r) {rw|#Z>A
return; &%DY\*
if ((mid - l) >= THRESHOLD) ;bib/
mergeSort(data, temp, l, mid); .@U@xRu7|
else ^"2J]&x`G
insertSort(data, l, mid - l + 1); 9~XAq^e
if ((r - mid) > THRESHOLD) hx%v+/
mergeSort(data, temp, mid + 1, r); Rtl"Ub@HV
else =s2*H8]
insertSort(data, mid + 1, r - mid); osAd1<EIC
*)T^ChD,
for (i = l; i <= mid; i++) { ~Ea} /Au
temp = data; ,m:.-iy?
} & l&:`nsJ
for (j = 1; j <= r - mid; j++) { 3yF,ak{Sl
temp[r - j + 1] = data[j + mid]; i%]EEVmN
} ,T$U'&;
int a = temp[l]; +gtbcF@rx
int b = temp[r]; 'Aq{UGN
for (i = l, j = r, k = l; k <= r; k++) { 06Sceq
if (a < b) { v%z=ysA
data[k] = temp[i++]; J @1!Oq>
a = temp; [D4SW#
} else { *C*U5~Zq7:
data[k] = temp[j--]; %_W)~Pv{+
b = temp[j]; ]MitOkX
} kfY}S
} 3$>1FoSk
} 9IfmW^0
~KX/ Ai
/** q ^N7I@Y
* @param data &.Qrs:U
* @param l {@{']Y
* @param i dOH&
*/ k2tF}
private void insertSort(int[] data, int start, int len) { @9RM9zK.q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {qJ1ko)$
} #a,PZDaE
} bJ {'<J
} 9-a0:bP
} '$(^W@M#6
E]n&=\
堆排序： H3=qe I
s)D;a-F
package org.rut.util.algorithm.support; !``,gExH
u^I|T.w<r6
import org.rut.util.algorithm.SortUtil; j-}O0~Jz
<^jQo<kU
/** '4Bm;&6M
* @author treeroot 0-Ku7<a
* @since 2006-2-2 O;jrCB
* @version 1.0 )'cMYC
*/ O-hAFKx
public class HeapSort implements SortUtil.Sort{ @:vwb\azVD
|TH\`U
/* (non-Javadoc) DA,?}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %pL''R9VF
*/ 0znR0%~
public void sort(int[] data) { .g<DD)`
MaxHeap h=new MaxHeap(); z,p~z*4
h.init(data); 0pd'93C
for(int i=0;i h.remove(); 3~{:`[0Q
System.arraycopy(h.queue,1,data,0,data.length); ={&j07,*a
} H40p86@M
XK@E;Rv
private static class MaxHeap{ HBXOjr<,{
D'DfJwA
void init(int[] data){ v$wIm,j
this.queue=new int[data.length+1]; >Abdd
for(int i=0;i queue[++size]=data; ;$wVu|&
fixUp(size); !?h;wR
} >SHhAEF
} ul>3B4
z$. 88^
private int size=0; `dN@u@[\ks
P}^W)@+3k
private int[] queue; ?NsW|w_
=X:Y,?
public int get() { kxhWq:[c
return queue[1]; 0~/_|?]`7
} 7[XRd9a5(
+\ .Lp 5
public void remove() { >KhOz[Zg
SortUtil.swap(queue,1,size--); nmKp[-5
fixDown(1); 9qzHS~l
} eru.m+\
file://fixdown r[iflBP
private void fixDown(int k) { ;[OH(!
int j; &}B|"s[
while ((j = k << 1) <= size) { {cVEmvE8
if (j < size %26amp;%26amp; queue[j] j++; c`w}|d]mC
if (queue[k]>queue[j]) file://不用交换 ~=l;=7 T
break; m&&m,6``P
SortUtil.swap(queue,j,k); {_p_%;
k = j; UySZbmP48
} VuZuS6~#J
} lq;Pch
private void fixUp(int k) { 8'io$6d=
while (k > 1) { c,+:i1IAy
int j = k >> 1; 'I6i,+D/q
if (queue[j]>queue[k]) z<XtS[ki
break; yl+gL?IES
SortUtil.swap(queue,j,k); h J)h\
k = j; y _k l:Ssa
} }Oq5tC@$G
} vV-`jsq20H
w%jII{@,
} A#iV=76_
Z,Dl` w
} M!D3}JRm
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SortUtil： VTY 5]|;
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package org.rut.util.algorithm; RQ" ,3.R==
d|Lj~x|
import org.rut.util.algorithm.support.BubbleSort; 4O!ikmY:t
import org.rut.util.algorithm.support.HeapSort; 12gU{VD
import org.rut.util.algorithm.support.ImprovedMergeSort; S9FE
import org.rut.util.algorithm.support.ImprovedQuickSort; 0)Wltw~`&
import org.rut.util.algorithm.support.InsertSort; H8}oIA"b
import org.rut.util.algorithm.support.MergeSort; X2~!(WxU F
import org.rut.util.algorithm.support.QuickSort; =^,m` _1
import org.rut.util.algorithm.support.SelectionSort; N2<!}Eyu
import org.rut.util.algorithm.support.ShellSort; {q^[a-h>
i2SR{e8:GF
/** H9Q&tl9
* @author treeroot O5T{eBo\
* @since 2006-2-2 *_\_'@1|J)
* @version 1.0 Yufc{M00
*/ $suzW;{#
public class SortUtil { v O_*yh1
public final static int INSERT = 1; :nOFR$W
public final static int BUBBLE = 2; ":QZy8f9%
public final static int SELECTION = 3; TJXT-\Vk
public final static int SHELL = 4; w@w(-F!%l
public final static int QUICK = 5; 8P&:_T!
public final static int IMPROVED_QUICK = 6; ZyFjFHe+
public final static int MERGE = 7; v_GUNRs
public final static int IMPROVED_MERGE = 8; e^1Twz3z
public final static int HEAP = 9; gT6jYQ
s&3Vg7B
public static void sort(int[] data) { )oPBa
sort(data, IMPROVED_QUICK); bq0zxg%
} UH"%N)[
private static String[] name={ 'YSHi\z ](
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z9Rp`z&`E
}; 3eQ&F~S
`*1p0~cu
private static Sort[] impl=new Sort[]{ AFE~ v\Gz
new InsertSort(), d<P\&!R(
new BubbleSort(), hv>\gBe i
new SelectionSort(), _u QOHwn
new ShellSort(), 8&b,qQ~
new QuickSort(), C,|,-CY
new ImprovedQuickSort(), %| Lfuz*
new MergeSort(), Z=vU}S>r|v
new ImprovedMergeSort(), OYn}5RN
new HeapSort() IyG}H}
}; yEE*B:
Q*ft7$l&
public static String toString(int algorithm){ }b.%Im<3R
return name[algorithm-1]; J<jy2@"tXo
} M[,@{u/
g{&ui.ml&
public static void sort(int[] data, int algorithm) { 4~Q/"hMSkO
impl[algorithm-1].sort(data); aO4?m+
} draN0vf
&6nWzF
public static interface Sort { ~oY^;/ j
public void sort(int[] data); \z(gqkc 6
} ?^\|-Gr
sD#.Oq4&]y
public static void swap(int[] data, int i, int j) { .U]-j\
int temp = data; ^s"R$?;h
data = data[j]; 5VU2[ \
data[j] = temp; Y`a3tO=Pd
} {F.[&/A
} nZYBE030