[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; #+Cu&l
} ,Tc598D
int i1=l; dJd(m&.|N
int i2=mid+1; wloQk(T<W
for(int cur=l;cur<=r;cur++){ xD<:'-ri>
if(i1==mid+1) +}0/ %5 =1
data[cur]=temp[i2++]; SdBo sB3v>
else if(i2>r) Q+'QJ7fw'|
data[cur]=temp[i1++]; ,v+~vXO&\
else if(temp[i1] data[cur]=temp[i1++]; _kT$/k
else E h>qUa
data[cur]=temp[i2++]; k9?fE
} D>Dch0{H,:
} 1-60gI1)
8!{F6DG
} $17utJ58
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改进后的归并排序: elf2!
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package org.rut.util.algorithm.support; -%^KDyZ<&
%) 8 UyZG
import org.rut.util.algorithm.SortUtil; bjEm=4FI;
!Wz%Hy:ZK
/** !r*Ogv[
* @author treeroot \sZ!F&a~
* @since 2006-2-2 0(!D1G{ul
* @version 1.0 ;y"quJ'O
*/ H"A|Z6y$^
public class ImprovedMergeSort implements SortUtil.Sort { ?4,e?S6,[
ZkZTCb`/l
private static final int THRESHOLD = 10; 48 `k"Uy
6{p]cr
/* B'Ll\<mq@
* (non-Javadoc) + \AiUY
* }?jL;CCe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @NS=
*/ kG>d^K
public void sort(int[] data) { ^ LTKX`p
int[] temp=new int[data.length]; O_jf)N\pi
mergeSort(data,temp,0,data.length-1); Lx:O Dd
} 4 u!)QG
jNa'l<dn]
private void mergeSort(int[] data, int[] temp, int l, int r) { MxO0#
int i, j, k; yBwgLn
int mid = (l + r) / 2; 'X$2gD3c9
if (l == r) g~JN"ap
return; %4~2
if ((mid - l) >= THRESHOLD) ],HF)21
mergeSort(data, temp, l, mid); q'%-8t
else <k0$3&D
insertSort(data, l, mid - l + 1); se1\<YHDS
if ((r - mid) > THRESHOLD) z\fmwI
mergeSort(data, temp, mid + 1, r); -W5ml @
else N>S_Vgk}
insertSort(data, mid + 1, r - mid); nDvj*lZF
X)^kJ`
for (i = l; i <= mid; i++) { #sK:q&/G`
temp = data; l|c#
} M/X&zr
for (j = 1; j <= r - mid; j++) { *uq;O*s
temp[r - j + 1] = data[j + mid]; O%.c%)4Xo
} pLvvv#Y
int a = temp[l]; `|\z#Et
int b = temp[r]; ;LM,<QJ
for (i = l, j = r, k = l; k <= r; k++) { 7LM?<lp]
if (a < b) { HH+$rrTT
data[k] = temp[i++]; ?,J'3nZ'
a = temp; ySLa4DQf
} else { :eIu<_,}
data[k] = temp[j--]; %\5d?;
b = temp[j]; {uQp$`
} i,DnXgmz@
} k<098F
} }&Gt&Hm>K
9b8ZOk'9_
/** #R<ErX)F
* @param data 478gl o
* @param l -c"nx$
* @param i E{m\LUd^ :
*/ I$7#Z!P6|
private void insertSort(int[] data, int start, int len) { "[[9i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Yz?4eSa/
} 4PwjG;!K
} $y\\?
} ^x8yWbrE
} }6;v`1Hr
y Q_lJIX
堆排序： -^i[
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package org.rut.util.algorithm.support; >8$]g
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import org.rut.util.algorithm.SortUtil; Hp2ysU
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/** ~@=*JzP?
* @author treeroot G(2(-x"+
* @since 2006-2-2 &QaFX,N"
* @version 1.0 Cx.GEY|0
*/ A.@S>H'P
public class HeapSort implements SortUtil.Sort{ biJ"@dm 4
0:Ow$
/* (non-Javadoc) `@$qy&AJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +=v6*%y"V
*/ )*=ds,
public void sort(int[] data) { .</`#
MaxHeap h=new MaxHeap(); w%(Ats
h.init(data); 0=3Av8
for(int i=0;i h.remove(); 5E|y5|8fb
System.arraycopy(h.queue,1,data,0,data.length); 2UPqn#.3
} 6 XZF8W
nU{}R"|
private static class MaxHeap{ FwB}@)3
<6_RWtU
void init(int[] data){ ^XsIQz[q
this.queue=new int[data.length+1]; TC7Rw}jF
for(int i=0;i queue[++size]=data; 21b
fixUp(size); K+=cNC4B
} MlDWK_y_&
} hmfO\gc}y
>h?!6L- d
private int size=0; S${n:e0\
n&? --9r
private int[] queue; D<-MbK^S
^W&qTSjh
public int get() { 9~ [Sio~
return queue[1]; >}& :y{z~
} jF5Y-CX
^EK]z8;|
public void remove() { (%&HufT
SortUtil.swap(queue,1,size--); YueYa#7z
fixDown(1); ^Jv$Wx
} C5q n(tv
file://fixdown o5NV4=
private void fixDown(int k) { F}/tV7m
int j; =Oo=&vA.oc
while ((j = k << 1) <= size) { 1{TmK9U
if (j < size %26amp;%26amp; queue[j] j++; =0Z^q0.
if (queue[k]>queue[j]) file://不用交换 FaNr}$Pe
break; >l<`)4*H
SortUtil.swap(queue,j,k); op\'T;xIu
k = j; 3#O Rfr(
} m&o6j>C
} xc4g`Xi
private void fixUp(int k) { _$g2;X >
while (k > 1) { =UGyZV:z5
int j = k >> 1; 4<j)1i=A
if (queue[j]>queue[k]) !fwMkws
break; ZCP r`H
SortUtil.swap(queue,j,k); :Pa^/i
k = j; }XJA#@
} M0+xl+c+
} `x{*P.]N!<
|ia#Elavo
} ]LcCom:]
4=BIYC"Lu
} q5@N//<DNN
#@rvoi
SortUtil： Q L0
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package org.rut.util.algorithm; =tP%K*Il4
S.u1[Yz^
import org.rut.util.algorithm.support.BubbleSort; F$tshe(
import org.rut.util.algorithm.support.HeapSort; Ol%KXq[
import org.rut.util.algorithm.support.ImprovedMergeSort; TBAF_$
import org.rut.util.algorithm.support.ImprovedQuickSort; |z1
import org.rut.util.algorithm.support.InsertSort; Aoi)11>
import org.rut.util.algorithm.support.MergeSort; zv~dW4'
import org.rut.util.algorithm.support.QuickSort; <_o).hE{
import org.rut.util.algorithm.support.SelectionSort; dF@m4U@L
import org.rut.util.algorithm.support.ShellSort; F(!9;O5J]
2.,4b-^
/** 6cO36
* @author treeroot 7?U)V03
* @since 2006-2-2 pTQ70V3
* @version 1.0 r |H 1Yy
*/ ;rH<
public class SortUtil { xaPaK-
public final static int INSERT = 1; LqZsH0C
public final static int BUBBLE = 2; y.iA]Ikz
public final static int SELECTION = 3; wFe?0u
public final static int SHELL = 4; 8@$`'h^6
public final static int QUICK = 5; uWtj?Q+M|
public final static int IMPROVED_QUICK = 6; ZNHlq5
public final static int MERGE = 7; xtWwz}^8]
public final static int IMPROVED_MERGE = 8; mz[Q]e~&i
public final static int HEAP = 9; {5GXN!f
~AvB5
public static void sort(int[] data) { 4qsP/`8
sort(data, IMPROVED_QUICK); 9;ZaL7>
} [w1 4hHnq
private static String[] name={ pXoD*o b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ktA5]f;
}; x6qQ Y<>
Whd\Ub8(
private static Sort[] impl=new Sort[]{ u~]O #v
new InsertSort(), uK6'TJ
new BubbleSort(), n'5LY9"
new SelectionSort(), 51sn+h<w
new ShellSort(), :637MD>5lO
new QuickSort(), MWl2;qi
new ImprovedQuickSort(), )z".lw
new MergeSort(), %X5p\VS\7
new ImprovedMergeSort(), mqt$'_M
new HeapSort() 3i*HwEh
}; ~x-"?K
D&dh>Pe1;
public static String toString(int algorithm){ <n;9IU
return name[algorithm-1]; !l(O$T9T
} "mtEjK5
rk E;OU
public static void sort(int[] data, int algorithm) { iAl.(j
impl[algorithm-1].sort(data); rGn6S&-
} *^+]`S
j5Cf\*B4J
public static interface Sort { hFQ*50n}
public void sort(int[] data); (:9=M5d
} k#oe:u`<
'PS_|zI
public static void swap(int[] data, int i, int j) { p.ks jD
int temp = data; X-_ $jKfM
data = data[j]; Ue?mb$ykC.
data[j] = temp; +lhjz*0
} ZL7#44
} !*\J4bJe