[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; BoXCc"q[
} %*uqtw8
int i1=l; uJWX7UGuz
int i2=mid+1; HGKm?'['
for(int cur=l;cur<=r;cur++){ ;gc2vDMv
if(i1==mid+1) "P|G^*"~2
data[cur]=temp[i2++]; d0xV<{,-
else if(i2>r) @@5u{K
data[cur]=temp[i1++]; o{ (v
else if(temp[i1] data[cur]=temp[i1++]; d. a>(G
else WULj@ds\~
data[cur]=temp[i2++]; $^l=#tV
} &a0%7ea`.S
} F^\v`l,
Bj2rA.M
} brFOQU?
6!'yU=Z`
改进后的归并排序: :eO]65N
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package org.rut.util.algorithm.support; F-X>|oK>z
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import org.rut.util.algorithm.SortUtil; rS jC/O&b
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/** Bm?Ku7}.
* @author treeroot 9qPP{K,Pq2
* @since 2006-2-2 +]{X-R
* @version 1.0 C }[u[)
*/ irm8z|N-
public class ImprovedMergeSort implements SortUtil.Sort { 6->b(B V $
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private static final int THRESHOLD = 10; J]N}8 0
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/* Ia\Nj _-%L
* (non-Javadoc) .UDZW*
* b:JOR@O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *dTw$T#
*/ 1Zecl);O{
public void sort(int[] data) { A#i-C+"}
int[] temp=new int[data.length]; ,Q:dAe[ZsX
mergeSort(data,temp,0,data.length-1); _#+9)*A
} .{}t[U
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private void mergeSort(int[] data, int[] temp, int l, int r) { |&'*Z\*ya
int i, j, k; M]2 c-
int mid = (l + r) / 2; 7%<jZ=
if (l == r) Ns $PS\
return; LY>JE6zTt
if ((mid - l) >= THRESHOLD) /t/q$X
mergeSort(data, temp, l, mid); &><`?
else "~ `-Jkm
insertSort(data, l, mid - l + 1); fG{oi(T
if ((r - mid) > THRESHOLD) 07#!b~N
mergeSort(data, temp, mid + 1, r); Hy6Np62
else Yv;aQF"a
insertSort(data, mid + 1, r - mid); -lp_~)j^
[ M'1aBx^
for (i = l; i <= mid; i++) { zPXd]jIwV
temp = data; :JS}(
} *vb)d0}P
for (j = 1; j <= r - mid; j++) { @Q^;qMy
temp[r - j + 1] = data[j + mid]; @4|/| !
} pr?/rXw
int a = temp[l]; "gO5dZ\0
int b = temp[r]; B^qB6:\t
for (i = l, j = r, k = l; k <= r; k++) { M{H&5 9v
if (a < b) { -7`J(f.rYC
data[k] = temp[i++]; 4{R`
a = temp; 83h3C EQ
} else { v+OVZDf
data[k] = temp[j--]; jQDxbkIuzE
b = temp[j]; u2eqVrY
} \Q$);:=qQ
} gXQ)\MY
} . FruI#99
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/** V OX>Sl
* @param data PTP2QAt
* @param l D%A-& =
* @param i c[I,Sveq
*/ e'6?iLpy
private void insertSort(int[] data, int start, int len) { ..t=Y#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8ah]D
} r:IU+3
} OTm`i>rB
} r3kI'I|bq
} _H,RcpyJ
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堆排序： V;V9_qP,
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package org.rut.util.algorithm.support; p.HA`R>
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import org.rut.util.algorithm.SortUtil; GyCpGP|AZ
kr?|>6?
/** A3n"zxU
* @author treeroot -'(:Sq,4o
* @since 2006-2-2 (}:xs,Ax
* @version 1.0 yV. P.Q
*/ . ~<+
public class HeapSort implements SortUtil.Sort{ 5"Yw$DB9
g9XtE
/* (non-Javadoc) .EcMn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |2# Ro*
*/ u;!Rv E8N
public void sort(int[] data) { 8n)Q^z+ K
MaxHeap h=new MaxHeap(); Ua]zTMI
h.init(data); sF$m?/Kt
for(int i=0;i h.remove(); D4\I;M^
System.arraycopy(h.queue,1,data,0,data.length); :q=OW1^k^
} 4Q>F4v`
-%.V0=G(Z
private static class MaxHeap{ G!\xc
1<83MO;
void init(int[] data){ R32d(2%5K
this.queue=new int[data.length+1]; z-DpLV
for(int i=0;i queue[++size]=data; dUZ&Ty^{
fixUp(size); 55,-1tWs
} X&IY(CX
} Q?@G>uz
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private int size=0; ?KN_J
Fo#*_y5\
private int[] queue; b~gF,^w
LPO" K"'w
public int get() { xh0A2bw'OP
return queue[1]; s__g*%@B b
} Oq5k4
V'.|IuN
public void remove() { #7=LI\
SortUtil.swap(queue,1,size--); St`m52V(5X
fixDown(1); E`|qFG<
} Q)>'fZ)
file://fixdown H<;j&\$q
private void fixDown(int k) { yH^*Fp8V
int j; R 6Em^A/>
while ((j = k << 1) <= size) { fm0(
if (j < size %26amp;%26amp; queue[j] j++; Xhi?b|
if (queue[k]>queue[j]) file://不用交换 w.f[)
break; 9YABr> ?
SortUtil.swap(queue,j,k); $b} +5
k = j; #pfosC[
} i"xDQ$0G6
} %a `dOEO
private void fixUp(int k) { k:Q<Uanc[
while (k > 1) { 3:Wr)>l}#
int j = k >> 1; gwJu&HA/
if (queue[j]>queue[k]) K}BX6dA
break; w C"%b#(}
SortUtil.swap(queue,j,k); CCOg1X_
k = j; SO/]d70HG
} #EUgb7
} {9 O`/|
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} qS al~
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} -e>)yM `i
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SortUtil： Vm.@qO*=
@g~sgE}#
package org.rut.util.algorithm; aehMLl9cl
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import org.rut.util.algorithm.support.BubbleSort; Kf#!IY][
import org.rut.util.algorithm.support.HeapSort; sjm79/
import org.rut.util.algorithm.support.ImprovedMergeSort; W+?[SnHL/
import org.rut.util.algorithm.support.ImprovedQuickSort; 9DX3]Z\7X
import org.rut.util.algorithm.support.InsertSort; G,*s9P]1
import org.rut.util.algorithm.support.MergeSort; ISew]R2
import org.rut.util.algorithm.support.QuickSort; "'Uk0>d=_I
import org.rut.util.algorithm.support.SelectionSort; B:cOcd?p
import org.rut.util.algorithm.support.ShellSort; fx:KH:q3
(N4(r<o;
/** 'OCo1|iK~
* @author treeroot ->=++
* @since 2006-2-2 M7,MxwZ0k
* @version 1.0 >N-%
*/ "6Uj:9
public class SortUtil { i5Q<~;Z+
public final static int INSERT = 1; zi .,?Q
public final static int BUBBLE = 2; J_|x^
public final static int SELECTION = 3; yan[{h]EZ
public final static int SHELL = 4; _#mqg]W'
public final static int QUICK = 5; bq-\'h f<
public final static int IMPROVED_QUICK = 6; ton`ji\^
public final static int MERGE = 7; :g[x;Q[@
public final static int IMPROVED_MERGE = 8; {LHe 6#
public final static int HEAP = 9; ~-wJ#E3g
X:&p9_O@
public static void sort(int[] data) { 0z7mre^Q
sort(data, IMPROVED_QUICK); 7"ps#)O
} ]xEE7H]\h
private static String[] name={ yuEOQ\!(u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p]Zabky
}; shIi,!bZ
#%b()I_([
private static Sort[] impl=new Sort[]{ XS8~jBjx
new InsertSort(), j9'XZq}
new BubbleSort(), X@U1Ri
new SelectionSort(), 9t.yP;j\Y
new ShellSort(), jSp&mD*xv
new QuickSort(), k^c=y<I
new ImprovedQuickSort(), es+_]:7B9
new MergeSort(), B@inH]wq
new ImprovedMergeSort(), wS*CcIwj
new HeapSort() cu!bg+,zl
}; O'|P|
Ks2%F&\cE
public static String toString(int algorithm){ %C0O?q
return name[algorithm-1]; pm@Z[g
} x*8f3^ wE
e uHu}
public static void sort(int[] data, int algorithm) { O>M*mTM
impl[algorithm-1].sort(data); #UCQiQfP
} yVQz<tX|
R+VLoz*J6
public static interface Sort { \Rqh|T<D
public void sort(int[] data); r5fkt>HZ
} 3H#/u! W
#r)1<}_e#
public static void swap(int[] data, int i, int j) { ugCS &
int temp = data; h?3l
data = data[j]; Ny,A#-?
data[j] = temp; MI'l4<>u
} W<|K
} tO>OD#