[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; lE78Yl]
} UA!-YTh
int i1=l; :UoZ`O~
int i2=mid+1; vDV`!JU
for(int cur=l;cur<=r;cur++){ }N]|zCEj
if(i1==mid+1) R3TdQ6j
data[cur]=temp[i2++]; 7Y&W^]UZ0t
else if(i2>r) Y#{ L}
data[cur]=temp[i1++]; T\:Vu{|
else if(temp[i1] data[cur]=temp[i1++]; rZLTai}`>
else |_&vW\
data[cur]=temp[i2++]; v,bes[Ik
} [M65T@v
} ^Y8?iC<+
b6RuYwHWV0
} {VE\}zKF
#Q.A)5_
改进后的归并排序: "EQ`Q=8
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package org.rut.util.algorithm.support; x~j>Lvw L
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import org.rut.util.algorithm.SortUtil; Jt\?,~,
&p8b4y_
/** -M2c8P:.b
* @author treeroot <.HX_z3l
* @since 2006-2-2 m=jxTZK
* @version 1.0 z4!TK ps
*/ ?x7zYE,6
public class ImprovedMergeSort implements SortUtil.Sort { @]uvpI!h
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private static final int THRESHOLD = 10; dT4?8:
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/* *IG} /O.VT
* (non-Javadoc) X!ZUR^
* qa)X\0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )cJ9YKKy
*/ zlco?Rt
public void sort(int[] data) { NYA,
int[] temp=new int[data.length]; ~2@+#1[g8z
mergeSort(data,temp,0,data.length-1); LX[<Wh_X(
} @;_xFL;{g
pUutI|mt/
private void mergeSort(int[] data, int[] temp, int l, int r) { g VX
int i, j, k; bCHJLtDQ
int mid = (l + r) / 2; m/Ou$
if (l == r) cK%Sty'8+
return; .|^L\L(!
if ((mid - l) >= THRESHOLD) 1v)ur\>R
mergeSort(data, temp, l, mid); [`Seh$
else M>nplHq
insertSort(data, l, mid - l + 1); tGDsZ;3Yr
if ((r - mid) > THRESHOLD) LG0+A}E=C
mergeSort(data, temp, mid + 1, r); a'u:1C^\
else C ?JcCD2
insertSort(data, mid + 1, r - mid); XZde}zUWn
\B/+.\
for (i = l; i <= mid; i++) { lqh+yX%*
temp = data; *`&4<>=n
} 7TD%vhbiwi
for (j = 1; j <= r - mid; j++) { z2*>5c%
temp[r - j + 1] = data[j + mid]; :l~Wt7R
} eLWD?-v%
int a = temp[l]; }G}2Y (
int b = temp[r]; |(G^3+5Uwm
for (i = l, j = r, k = l; k <= r; k++) { HJWk%t<
if (a < b) { .Y|5i^i9{
data[k] = temp[i++]; =z`#n}v
a = temp; M:K5r7Q!yv
} else { mj:X'BVA
data[k] = temp[j--]; @px2/x
b = temp[j]; 1ml>
} *;@V5[^3I?
} +NWhvs
} '0|0rwx
z/Z 0cM#
/** }TE4)vXs
* @param data #~QkS_
* @param l xc{$=>'G
* @param i m%au* 0p
*/ "=8= G
private void insertSort(int[] data, int start, int len) { uflRW+-2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Mtxn@m{i;"
} }8tD|t[
} a^/j&9
} j`tBki:
} ZyAm:yO
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堆排序： C]H'z
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package org.rut.util.algorithm.support; "g}mxPe
x[L/d"Wf
import org.rut.util.algorithm.SortUtil; >F7v'-*{
vU|=" #
/** |hGi8
* @author treeroot kD1[6cJ!=.
* @since 2006-2-2 4'EC(NR7N
* @version 1.0 qcpAjjK
*/ N;N,5rxV
public class HeapSort implements SortUtil.Sort{ Eci,];S7
+'aG&^k4
/* (non-Javadoc) (b!`klQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <;)qyP
*/ )/uu~9SFd
public void sort(int[] data) { v:.`~h/b
MaxHeap h=new MaxHeap(); MYI*0o;
h.init(data); j!m42
for(int i=0;i h.remove(); >Vp#
System.arraycopy(h.queue,1,data,0,data.length); oY Y?`<N#
} e:2e5gz
+7%}SV 2)
private static class MaxHeap{ 4l)Q
|a!y%R=
void init(int[] data){ \ct7~!qM
this.queue=new int[data.length+1]; ;F3#AO4(
for(int i=0;i queue[++size]=data; .]gY{_|x
fixUp(size); En&`m
} |,ws3
} yex4A)n9"'
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private int size=0; H!6nIS9yxt
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private int[] queue; ZP*(ZU@j=Z
PO1|l-v<Yq
public int get() { )o51QgPy
return queue[1]; #21t8
} 3/d`s0O
$K-od3h4=
public void remove() { r*Iu6
SortUtil.swap(queue,1,size--); @xu/&pbI
fixDown(1); *21foBfqh
} b&iJui"7k
file://fixdown \9FWH}|
private void fixDown(int k) { Y\cQ"9
int j; 8y$c\Eu(mF
while ((j = k << 1) <= size) { xNLvK:@0p
if (j < size %26amp;%26amp; queue[j] j++; IgxZ_2hO
if (queue[k]>queue[j]) file://不用交换 y&F0IJ|`@M
break; bi=IIVlH
SortUtil.swap(queue,j,k); ??MF8uv
k = j; >o45vB4o
} 2p6`@8*34
} 4|yZA*Q^
private void fixUp(int k) { @20~R/vh
while (k > 1) { E 0k1yA
int j = k >> 1; 7E4Xvg+c
if (queue[j]>queue[k]) HW,2x}[
break; vH`m W`=
SortUtil.swap(queue,j,k); o>G^)aRa
k = j; *Y!c6eA
} 9bE/7v
} }iu(-{Z
97XGJ1HI
} Td|x~mZv:
P. V #
} qjc8$#zXS
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SortUtil： gr&Rkuyfv
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package org.rut.util.algorithm; {\87]xJ
Hf^Tok^6@]
import org.rut.util.algorithm.support.BubbleSort; z'9Mg]&>
import org.rut.util.algorithm.support.HeapSort; cag9f?w@V
import org.rut.util.algorithm.support.ImprovedMergeSort; 0nX.%2p#Je
import org.rut.util.algorithm.support.ImprovedQuickSort; fD>0
import org.rut.util.algorithm.support.InsertSort; _mi(:s(
import org.rut.util.algorithm.support.MergeSort; 1Vden.H*CI
import org.rut.util.algorithm.support.QuickSort; *CnrzrKtQ
import org.rut.util.algorithm.support.SelectionSort; ohy?l
import org.rut.util.algorithm.support.ShellSort; jT6zpi~]E
9S_N*wC.
/** J&<uP)<
* @author treeroot 4hzS
* @since 2006-2-2 o{QU?H5h
* @version 1.0 Ku W$
*/ `/1Zy}cD
public class SortUtil { ^KK9T5H
public final static int INSERT = 1; 8N58w)%7`
public final static int BUBBLE = 2; xUG:x4Gz+
public final static int SELECTION = 3; 4h[S`;D0Vf
public final static int SHELL = 4; 9YtdE*,k
public final static int QUICK = 5; K% Gbl#
public final static int IMPROVED_QUICK = 6; m4@f&6x
public final static int MERGE = 7; x:Nd>Fb
public final static int IMPROVED_MERGE = 8; :2n(WXFFI
public final static int HEAP = 9; 1.5lJ:[G
_tGR:E
public static void sort(int[] data) { e1k\:]6
sort(data, IMPROVED_QUICK); cuw3}4m%
} OR\-%JX/5
private static String[] name={ 0lvX,78G;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VB?mr13}G
}; +]!`>
qZ39TTQ*p
private static Sort[] impl=new Sort[]{ JMT?+/Qbu
new InsertSort(), kOe~0xoT@u
new BubbleSort(), .W>8bg'u9
new SelectionSort(), 7%(|)3"V
new ShellSort(), B-OuBS,fwC
new QuickSort(), T21SuM
new ImprovedQuickSort(), kZlRS^6
new MergeSort(), u D.E>.B
new ImprovedMergeSort(), MKuy?mri~
new HeapSort() GW(-'V/
}; Q)l]TgvSe
^z[-pTY
public static String toString(int algorithm){ LX %8a^?;
return name[algorithm-1]; xYMNyj~
} JMMsOA_]
J{Z-4y
public static void sort(int[] data, int algorithm) { zn |=Q$81
impl[algorithm-1].sort(data); C+WHg-l
} ; md{T'
9u'hCi(
public static interface Sort { 3,K*r"=
public void sort(int[] data); F7(~v2|
} lRn6Zh
v!;E1
public static void swap(int[] data, int i, int j) { t `4^cd5V
int temp = data; d E@R7yU@
data = data[j]; `;^%t
data[j] = temp; VesO/xG<
} o3;u*f0rWn
} X-Sso9/q.