[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; ;61m
} t747SZWgB
int i1=l; vN7ihe[C
int i2=mid+1; 9CWUhS
for(int cur=l;cur<=r;cur++){ o+O\VNW
if(i1==mid+1) 8[FC
data[cur]=temp[i2++]; FK#>E[[
else if(i2>r) lm&C!{K
data[cur]=temp[i1++]; ~::gLm+f
else if(temp[i1] data[cur]=temp[i1++]; 9&W\BQ
else 7OOB6[.fu
data[cur]=temp[i2++]; 3RRZVc* ^
} ,U'Er#U
} /d >fp
Z3R..vy8
} )vS##-[_
A?;/]m;
改进后的归并排序: rDYq]`
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package org.rut.util.algorithm.support; j86s[Dty
r\[HR ^`
import org.rut.util.algorithm.SortUtil; )M]4p6Y
zoOm[X=?3
/** ?XGZp?6
* @author treeroot 3MjMN%{P
* @since 2006-2-2 ;:9 x.IkxC
* @version 1.0 va;d[D,
*/ (cYc03"
public class ImprovedMergeSort implements SortUtil.Sort { &/\0_CoTR\
-JZl?hY(
private static final int THRESHOLD = 10; ZrA\a#z"<
5H 1(C#|
/* <UQ:1W8>B
* (non-Javadoc) 7B%@f9g
* xm YA/wt8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cp?`\P
*/ mc(&'U8R0I
public void sort(int[] data) { YQN=.Wtc
int[] temp=new int[data.length]; \lR~!6:
mergeSort(data,temp,0,data.length-1); =WEfo;
} ;gm){ g
i}<R>]S
private void mergeSort(int[] data, int[] temp, int l, int r) { }C#YR(]
int i, j, k; mk4%]t"
int mid = (l + r) / 2; jd2Fh):q
if (l == r) 4kg9R^0
return; jgbw'BBu
if ((mid - l) >= THRESHOLD) JpDYB
mergeSort(data, temp, l, mid); 5Cy)#Z{
else ]NAPvw#p
insertSort(data, l, mid - l + 1); GN1cnM>`
if ((r - mid) > THRESHOLD) C [2tH2*#
mergeSort(data, temp, mid + 1, r); wOi>i`D&
else 5[gkGKkf_
insertSort(data, mid + 1, r - mid); ?o.G@-
$;;?'!%.
for (i = l; i <= mid; i++) { *qb`wg
temp = data; Op%^dwVG(v
} jSYj+k
for (j = 1; j <= r - mid; j++) { @/0aj
temp[r - j + 1] = data[j + mid]; 6xFZv t
} K.z}%a
int a = temp[l]; e('c9 Y
int b = temp[r]; "4tRy9q
for (i = l, j = r, k = l; k <= r; k++) { *h =7:*n
if (a < b) { x(b&r g.-0
data[k] = temp[i++]; RPiCXpJv&
a = temp; ~4`wfOvO
} else { 2%8N<GW.F
data[k] = temp[j--]; *Nt6 Ufq6
b = temp[j]; 4UL-j
} i2j)%Gc}
} n)K6Z{x
} AN~1E@"
`z=MI66Nl
/** a|7V{pp=M
* @param data +u=xBhZ
* @param l ;C"J5RA
* @param i iuHG9#n
*/ ;%jt;Xv9
private void insertSort(int[] data, int start, int len) { /BIPLDN6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); If&p$pAH?
} kcYR:;y
} M}5C;E*
} gN]`$==c[
} MW$9,[
}dXL= ul
堆排序： v%FVz
lpp'.HTP
package org.rut.util.algorithm.support; ,DE%p +q
-%N (X8
import org.rut.util.algorithm.SortUtil; UJm`GO
]DUH_<3"E
/** []2GN{m
* @author treeroot df:,5@CJ8
* @since 2006-2-2 uyA9`~p=#
* @version 1.0 Sc0ZT/Lm
*/ q/3}8BJ
public class HeapSort implements SortUtil.Sort{ F@I_sGCcb
Va 5U`0
/* (non-Javadoc) Yr31GJ}K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SUVr&S6Nk
*/ & aLR'*]6
public void sort(int[] data) { OKU P
MaxHeap h=new MaxHeap(); SA&wW\Ym]
h.init(data); ;% !?dH6
for(int i=0;i h.remove(); ;dWqMnV
System.arraycopy(h.queue,1,data,0,data.length); Qxvz}r.l]
} QAJ>93
@KpzxcEoO
private static class MaxHeap{ 7uDUZdJy
T#BOrT>V
void init(int[] data){ 14&EdTG.
this.queue=new int[data.length+1]; {0LdLRNZ
for(int i=0;i queue[++size]=data; UF{2Gx
fixUp(size); :qZ^<3+:
} drZw#b
} f*5"Jh@
v8X&H
private int size=0; ?)X@4Jem
*=Fcu@
private int[] queue; "Dk:r/
Ww p^dx`!
public int get() { <Q0&[q;Z
return queue[1]; Yx%%+c?.
} `Q8D[
Z kS*CG
public void remove() { Kq?7#,_
SortUtil.swap(queue,1,size--); 4J_%quxO
fixDown(1); Rk=B;
} z%KChU
file://fixdown qb<gh D=j
private void fixDown(int k) { s_[?(Ip{
int j; S3<v?tqLr
while ((j = k << 1) <= size) { Xm4wuX"e=
if (j < size %26amp;%26amp; queue[j] j++; Mm;)O'XDE
if (queue[k]>queue[j]) file://不用交换 4(&'V+o
break; d;^?6V
SortUtil.swap(queue,j,k); 7h<K)aT
k = j; l}^#kHSyd
} JU@$(
} + ND9###
private void fixUp(int k) { .3&m:P8zV
while (k > 1) { ;H=6u
int j = k >> 1; 2ya`2 m
if (queue[j]>queue[k]) H5AY6),
break; OS 6 )`
SortUtil.swap(queue,j,k); s7e'9Bx
k = j; 6)$_2G%Zq
} <H)@vW]_
} ws=TR
}B-A*TI<h
} Dpd$&Wr0Y
qWFg~s#+
} cTnbI4S;
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SortUtil： f+6l0@K2
GCKl[<9*
package org.rut.util.algorithm; {<2ZbN?
|$t0cd
import org.rut.util.algorithm.support.BubbleSort; T42g4j/l~
import org.rut.util.algorithm.support.HeapSort; LTe7f8A
import org.rut.util.algorithm.support.ImprovedMergeSort; w(j9[
import org.rut.util.algorithm.support.ImprovedQuickSort; J]0#M:w&
import org.rut.util.algorithm.support.InsertSort; 0- UeFy
import org.rut.util.algorithm.support.MergeSort; h[]N=X
import org.rut.util.algorithm.support.QuickSort; *LRGfk+h
import org.rut.util.algorithm.support.SelectionSort; :tqjm:
import org.rut.util.algorithm.support.ShellSort; l 3K8{HY
9zyN8v2
/** *K(xES!b
* @author treeroot +7^Ul6BB#K
* @since 2006-2-2 .{-yveE
* @version 1.0 3(:mRb}
*/ .;2!c'mT9
public class SortUtil { Cf7\>U->
public final static int INSERT = 1; x\rZoF.NQ
public final static int BUBBLE = 2; UjaC( c
public final static int SELECTION = 3; ~^S-
public final static int SHELL = 4; |DW'RopM
public final static int QUICK = 5; Bkc-iC}F
public final static int IMPROVED_QUICK = 6; XV>6;!=E
public final static int MERGE = 7; )ta5y7np
public final static int IMPROVED_MERGE = 8; (UZ*36@PJx
public final static int HEAP = 9; @:&+wq_>A^
O[y`'z;C
public static void sort(int[] data) { C=IH#E=
sort(data, IMPROVED_QUICK); ?C:fP`j:
} kA4ei
private static String[] name={ ".%LBs~$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;ZJ,l)BNO
}; x]oQl^F
Q*.FUV&;
private static Sort[] impl=new Sort[]{ =!^iiHF
new InsertSort(), @<G/H|f
new BubbleSort(), 3ms/v:\
new SelectionSort(), CD_f[u
new ShellSort(), 7]%il[
new QuickSort(), (;&?B.<\:
new ImprovedQuickSort(), *fSM'q;
new MergeSort(), %j">&U.[
new ImprovedMergeSort(), p2vBj.*J
new HeapSort() jtv Q<4
}; pT@!O}'$
\&5@yh
public static String toString(int algorithm){ LG#w/).^
return name[algorithm-1]; dV{Hn {(
} ]$*{<
1H=wl=K
public static void sort(int[] data, int algorithm) { e@=[+iJc
impl[algorithm-1].sort(data); 7omGg~!k(
} i4n b#
Oq,.Kz
public static interface Sort { ]7kGHIJ|
public void sort(int[] data); s;s-6%p
} |WU`p
nnL$m_K~
public static void swap(int[] data, int i, int j) { oks=|'&
int temp = data; Qz+d[%Q}x
data = data[j]; jF{gDK
data[j] = temp; ;jU-<
} -]\E}Ti
} df6Ν4L