[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; sm&rR=b
} h'YcNkM 2>
int i1=l; Aya;ycsgE
int i2=mid+1; /hEGk~
for(int cur=l;cur<=r;cur++){ $hE'b9qx
if(i1==mid+1) H;7H6fyZ
data[cur]=temp[i2++]; c"sw@<HG
else if(i2>r) _OxnHf:|
data[cur]=temp[i1++]; .&yWHdQC:
else if(temp[i1] data[cur]=temp[i1++]; (27F
else VY&9kN
data[cur]=temp[i2++]; 85@6uBh
} tSXjp
} _Fh0^O@
<T_Nlar^^
} _8b>r1$
vVN[bD<
改进后的归并排序: "6NNId|Y
M"$RtS|h
package org.rut.util.algorithm.support; ]MA)='~
bQN4ozSi
import org.rut.util.algorithm.SortUtil; by y1MgQd
J0WXH/:
/** lSbM)gL
* @author treeroot F=T.*-oS3
* @since 2006-2-2 %/4_|@<'
* @version 1.0 LYq2A,wm$
*/ 7/OOq=z
public class ImprovedMergeSort implements SortUtil.Sort { u/:Sf*;?
fUWm7>6VA>
private static final int THRESHOLD = 10; -K'84 bZ
qF6%XKbh=
/* /G{3p&9
* (non-Javadoc) y`@4n.Q
* xY'YbHFz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dSOn\+
*/ }]GK@nn7
public void sort(int[] data) { CY).I`aJ
int[] temp=new int[data.length]; hE#8_34%s
mergeSort(data,temp,0,data.length-1); ?d#(ian
} Mc3h R0
-bu. *=
private void mergeSort(int[] data, int[] temp, int l, int r) { 5'Ay@FJ:
int i, j, k; !skWe~/
int mid = (l + r) / 2; k'q !MZU
if (l == r) 9C~GL,uKs
return; n *0F
if ((mid - l) >= THRESHOLD) o%>nu
mergeSort(data, temp, l, mid); nMoF;AdKm
else >)Z2bCe
insertSort(data, l, mid - l + 1); ,F9wc<V8
if ((r - mid) > THRESHOLD) 4wD^?S!p
mergeSort(data, temp, mid + 1, r); Q)X\VQcgj
else &J@ZF<Ib
insertSort(data, mid + 1, r - mid); 2}Plr{s9
AX Jj"hN
for (i = l; i <= mid; i++) { *ik)>c_
temp = data; 0H]9$D
} v=WDs#"
for (j = 1; j <= r - mid; j++) { M_ cb(=ey
temp[r - j + 1] = data[j + mid]; `l0icfy
} GeTCN
int a = temp[l]; +hhbp'%
int b = temp[r]; I%*Zj,>
for (i = l, j = r, k = l; k <= r; k++) { IX3yNTW"L
if (a < b) { C4TD@
data[k] = temp[i++]; ^O:RS g9
a = temp; _r)nbQm&
} else { 4IE#dwZW
data[k] = temp[j--]; W&[9x%Ba
b = temp[j]; 2-2LmxLG
} 3lgyX/?o
} h4xdE0
} 62'0)Cy^
J@{Bv%
/** (8F?yBu
* @param data s_?*R
* @param l 8>+eGz|
* @param i dM.Ow!j
*/ $4)guG)
private void insertSort(int[] data, int start, int len) { m,fr?d/;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QncS&
} E0Xu9IW/A
} S?WUSx*N
} [beuDZA
} ,\RCgc
S%|' /cFo
堆排序： sW`iXsbWM>
Y(mwJud|
package org.rut.util.algorithm.support; UM^hF%
5S?Xl|8E
import org.rut.util.algorithm.SortUtil; Ek\Zi#f<
w5R9\<3L
/** ;yoq/
* @author treeroot r2`?Ta
* @since 2006-2-2 TK1MmL
* @version 1.0 KDzIarC
*/ X,Q(W0-6$u
public class HeapSort implements SortUtil.Sort{ %j`]x -aOz
imuHSxcaV
/* (non-Javadoc) ~.SU$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8[XNFFUZs
*/ TQfY%GKg(
public void sort(int[] data) { "K]4j]yU
MaxHeap h=new MaxHeap(); @}}1xP4Sr
h.init(data); ^U1+D^AJ
for(int i=0;i h.remove(); yrb%g~ELGn
System.arraycopy(h.queue,1,data,0,data.length); HM x9M$
} /;[')RO`
!2,.C+,
private static class MaxHeap{ 3c"{Wu-}
v8=MO:>{R
void init(int[] data){ E$baQU hKS
this.queue=new int[data.length+1]; eVJL|uI|
for(int i=0;i queue[++size]=data; P=g+6-1
fixUp(size); KJ |1zCM
} *V+fRN4 W
} '/@VG_9L]
|1$X`|S
private int size=0; yw^,@'
_z<q9:
private int[] queue; Cr"hu;
svII =JB
public int get() { Xp@OIn
return queue[1]; .- o,_eg1f
} }\*|b@)]
B!lw>rUMQ
public void remove() { >m46tfoM
SortUtil.swap(queue,1,size--); 06r cW `
fixDown(1); IrK )N
} ENr&k(>0HQ
file://fixdown e hGC N=
private void fixDown(int k) { :DP{YL|x
int j; QX/`s3N
while ((j = k << 1) <= size) { e;v2`2z2
if (j < size %26amp;%26amp; queue[j] j++; {643Dz<e
if (queue[k]>queue[j]) file://不用交换 'McVaPav
break; [ ff.R
SortUtil.swap(queue,j,k); jKs8i$q
k = j; C8-q<t#SF
} L T!X|O.
} p^3d1H3
private void fixUp(int k) { 5^i ^?
while (k > 1) { ?z.`rD$}(n
int j = k >> 1; l K%Hb=
if (queue[j]>queue[k]) a$-ax[:\sm
break; _t7A'`Dh]
SortUtil.swap(queue,j,k); W@LR!EW)
k = j; @A%`\Ea%
} :>u{BG;=79
} q Sah_N
G%{jU'2
} :JmNy<
ME"/%59r
} HvU)GJ u b
5,3h'\ "!
SortUtil： #:X:~T
0!T $Ef
package org.rut.util.algorithm; #';r 0?|
1{qg@xlj
import org.rut.util.algorithm.support.BubbleSort; =>Efrma
import org.rut.util.algorithm.support.HeapSort; 5Dd;?T>
import org.rut.util.algorithm.support.ImprovedMergeSort; F$v G=3
import org.rut.util.algorithm.support.ImprovedQuickSort; ] N8V?.|:
import org.rut.util.algorithm.support.InsertSort; ">7 bnOJ
import org.rut.util.algorithm.support.MergeSort; #N:o)I
import org.rut.util.algorithm.support.QuickSort; *^]ba>
import org.rut.util.algorithm.support.SelectionSort; kBkhuKd)V
import org.rut.util.algorithm.support.ShellSort; {Ffr l(*
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/** sj1x>
* @author treeroot tBt\&{=|D
* @since 2006-2-2 4R.#=]F
* @version 1.0 <_}u5E)7(
*/ '?nhpT^
public class SortUtil { Ogb!YF#e
public final static int INSERT = 1; sSxra!tv4
public final static int BUBBLE = 2; pAYuOk9n
public final static int SELECTION = 3; zB4gnVhus|
public final static int SHELL = 4; 6b0#z#E
public final static int QUICK = 5; y}8j_r
public final static int IMPROVED_QUICK = 6; JL1Whf
public final static int MERGE = 7; MZ.Jkf(
public final static int IMPROVED_MERGE = 8; Yd9y8TqJ
public final static int HEAP = 9; JyV"jL
`R\0g\
public static void sort(int[] data) { n#iL[ &/Aw
sort(data, IMPROVED_QUICK); uKplPze?
} 4IVCTz[
private static String[] name={ @jfd.? RK!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MCvjdc3:
}; 3OTSLF/
e(b*T
private static Sort[] impl=new Sort[]{ VHy$\5oYg
new InsertSort(), #R &F
new BubbleSort(), 9d v+u6)
new SelectionSort(), u(P D+Gz
new ShellSort(), *v6'I-#
new QuickSort(), z}Q54,9m
new ImprovedQuickSort(), H}d&>!\}F
new MergeSort(), '_2~8w
new ImprovedMergeSort(), >qOhzbAH{<
new HeapSort() VE!h!`<k
}; _d:l1jD
l+@NjZGm<
public static String toString(int algorithm){ (URWicaB
return name[algorithm-1]; ]cbY@U3!2
} qT(j%F
\D0Pik@?
public static void sort(int[] data, int algorithm) { S%'t )tt,
impl[algorithm-1].sort(data); s iC/k*
} C{4[7
RszqDm
public static interface Sort { SNcaIzbr
public void sort(int[] data); (sZB-
} yPW?%7 h
I~Ziq10
public static void swap(int[] data, int i, int j) { ~"8b\oLW
int temp = data; i-$]Tg
data = data[j]; b}Jcj
data[j] = temp; r@ ]{`qA
} A+AqlM+$i
} 94Are<