[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; IX3r$}4
} h\yYg'CC
int i1=l; ^EB}e15"
int i2=mid+1; aWit^dp
for(int cur=l;cur<=r;cur++){ h;B'#$_
if(i1==mid+1) SY)o<MD
data[cur]=temp[i2++]; ;mMn-+3<
else if(i2>r) C|>#|5XaF
data[cur]=temp[i1++]; 9eV@v
else if(temp[i1] data[cur]=temp[i1++]; =7jkW (Q
else oc15!M3$
data[cur]=temp[i2++]; D3jP hPy.
} UH)A n:9
} f[X>?{q
EswM#D9(4
} ^x4gUT-Wy
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改进后的归并排序: +xWT)h/
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package org.rut.util.algorithm.support; j\W+wnAgk
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import org.rut.util.algorithm.SortUtil; |#S!qnXB
f+)F-3
/** "=qdBG9
* @author treeroot Q@M,:0+cy
* @since 2006-2-2 `a<G7
* @version 1.0 9m#`56G`
*/ yJr'\(
public class ImprovedMergeSort implements SortUtil.Sort { SX;FBO(p
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private static final int THRESHOLD = 10; h5Z%|J>;0
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/* YAO.Ccz
* (non-Javadoc) 44n^21k
* uD+;5S]us
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V57^0^Zp`
*/ MRiETd"
public void sort(int[] data) { ysSEgC3
int[] temp=new int[data.length]; ;KnnAZJ
mergeSort(data,temp,0,data.length-1); <8H`y(S
} [jafPi(#g
6~}=? sX4
private void mergeSort(int[] data, int[] temp, int l, int r) { &<L+;k~P%
int i, j, k; ~ Iv[
int mid = (l + r) / 2; u[cbRn,W
if (l == r) 4u"O/rt
return; YHE7`\l
if ((mid - l) >= THRESHOLD) Qs~;?BH&
mergeSort(data, temp, l, mid); T6{IuQjXs
else i8dv|oa
insertSort(data, l, mid - l + 1); 8 2_3|T
if ((r - mid) > THRESHOLD) PI }A')Nq.
mergeSort(data, temp, mid + 1, r); $o-s?";
else 73P(oVj<
insertSort(data, mid + 1, r - mid); YRB,jwne
FzW(An&x2
for (i = l; i <= mid; i++) { aLP2p]
temp = data; Ii;~ xc
} ]T+{]t
for (j = 1; j <= r - mid; j++) { f^nogw<z!
temp[r - j + 1] = data[j + mid]; iS02uVmBZ
} '?q|7[SU
int a = temp[l]; Yj;$hV8j(
int b = temp[r]; cz.-cuD[iD
for (i = l, j = r, k = l; k <= r; k++) { @1rF9< 4g
if (a < b) { R_(A&,
data[k] = temp[i++]; PF4Cs3m/
a = temp; In]h+tG?rN
} else { YsDn?pD@
data[k] = temp[j--]; {-H6Z#b[
b = temp[j]; GXa-g-d
} [<bfwTFsl
} /SZsXaC '
} {L3lQ8Z
YMJ?t"
/** I2D<~xP~2+
* @param data '|Cs!Zl
* @param l 0gxbo
* @param i ?e yo2:-$
*/ +\Rp N
private void insertSort(int[] data, int start, int len) { 27gK Y Zf;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +|\dVe.
} 1)M3*h3
} L{osh0
} sexnO^s
} +xB!T1pD
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堆排序： lO)p
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package org.rut.util.algorithm.support; O[Nc$dc
wB"&K;t
import org.rut.util.algorithm.SortUtil; 4km=KOx[
c7S<ex,
/** G{YLyl/9
* @author treeroot P|c79
* @since 2006-2-2 _ 4pBJOJQ6
* @version 1.0 CShVJ:u+K\
*/ R)ejIKtY
public class HeapSort implements SortUtil.Sort{ par $0z/
91`biVZfA
/* (non-Javadoc) |fq1Mn8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N!aV~\E
*/ F5:4 B]ZF
public void sort(int[] data) { iC$~v#2
MaxHeap h=new MaxHeap(); V/<dHOfR\
h.init(data); "wA3l%d[Y
for(int i=0;i h.remove(); ,Rz,[KI|
System.arraycopy(h.queue,1,data,0,data.length); zN*/G6>A
} (lT H EiX
ME{i-E4
private static class MaxHeap{ \2pJ ]
USJ4qv+-
void init(int[] data){ hAKyT~[n0
this.queue=new int[data.length+1]; ,~%Qu~\
for(int i=0;i queue[++size]=data; -7hU1j~I
fixUp(size); <HI5xB_
} hP,SvN#!2
} [Kx_%Le
0}-&v+
private int size=0; zZGPA j
74xI#`E
private int[] queue; E.t9F3
{SJ=|L6
public int get() { WSKG8JT^|
return queue[1]; ,r+=>vre
} kjJ\7x6M
rN8 ZQiJC
public void remove() { '9]%#^[Q
SortUtil.swap(queue,1,size--); wlmi&kq
fixDown(1); 4f'WF5S/}8
} \^w=T*
file://fixdown +7^{T:^ht
private void fixDown(int k) { .0r5=
int j; +|r) ;>b
while ((j = k << 1) <= size) { n!A')]y"
if (j < size %26amp;%26amp; queue[j] j++; v6;XxBR6
if (queue[k]>queue[j]) file://不用交换 e#)}.
break; dGrOw)
SortUtil.swap(queue,j,k); 5d<-y2!M
k = j; coiTVDwA
} j"yL6Q9P
} Xo;J1H
private void fixUp(int k) { [P`Q_L,+
while (k > 1) { #c./<<P5}
int j = k >> 1; _T<ney}Y<
if (queue[j]>queue[k]) >5i1M^g(
break; m%'9zL c
SortUtil.swap(queue,j,k); HkGzyDt
k = j; g=:%j5?.e
} jrvhTej
} av&dGsFP
9Or3X/:o
} !s9<%bp3
6^s]2mMfk
} Z#3wMK~
fZ 17
SortUtil： e}-uU7O
Wi'BX#xCB
package org.rut.util.algorithm; W9ZT=#>)[
qL,QsRwN
import org.rut.util.algorithm.support.BubbleSort; #}^ZxEU
import org.rut.util.algorithm.support.HeapSort; gh['T,
import org.rut.util.algorithm.support.ImprovedMergeSort; QSmE:Y
import org.rut.util.algorithm.support.ImprovedQuickSort; vx5;}[Bhm
import org.rut.util.algorithm.support.InsertSort; o>\jc
import org.rut.util.algorithm.support.MergeSort; Qf$0^$ "
import org.rut.util.algorithm.support.QuickSort; Yono8M;9*
import org.rut.util.algorithm.support.SelectionSort; ~BaU2S@y
import org.rut.util.algorithm.support.ShellSort; <~u.:x@ R
b=Zg1SqV
/** 4qrPAt
* @author treeroot kZWc(LwA
* @since 2006-2-2 l)Q,*i
* @version 1.0 bv)E>%Yy
*/ p}}}~ lC/
public class SortUtil { _+T;4U'p
public final static int INSERT = 1; *;1G+Q#
public final static int BUBBLE = 2; #Jq@p_T"
public final static int SELECTION = 3; -$.$6"]
public final static int SHELL = 4; ^{zwIH2I]
public final static int QUICK = 5; iShB^
public final static int IMPROVED_QUICK = 6; 0/#XUX 4
public final static int MERGE = 7; "mSDL:$
public final static int IMPROVED_MERGE = 8; O_FT@bo\
public final static int HEAP = 9; .KIAeCvl\
Q4Hf!v]r
public static void sort(int[] data) { pz:$n_XC}
sort(data, IMPROVED_QUICK); 9 %,_G.
} B@63=a*kG
private static String[] name={ :2 n5;fp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [64K?l0&
}; C;OU2,c,T
tv,^ Q}
private static Sort[] impl=new Sort[]{ YL;ZZ2A
new InsertSort(), @lc1Ipfk"
new BubbleSort(), X.o[=E
new SelectionSort(), nsaf6y&E
new ShellSort(), qWy{{A+
new QuickSort(), CDO_A\
new ImprovedQuickSort(), MVe5j+8
new MergeSort(), IhJ _Yed
new ImprovedMergeSort(), `i9WnPRt
new HeapSort() 2Qc&6-;`
}; SrN0f0
ad&Mk^p
public static String toString(int algorithm){ oB&s2~
return name[algorithm-1]; M#=woj&[
} \Nb6E&+
s3uT:Xw3rW
public static void sort(int[] data, int algorithm) { `g6ZhG:W
impl[algorithm-1].sort(data); H]mY6D51"
} eOZA2
\$yI'q
public static interface Sort { 7: J6 F
public void sort(int[] data); "Y7RvL!U
} oYup*@t
%_@8f|# ,M
public static void swap(int[] data, int i, int j) { 4_F<jx,G
int temp = data; bqS*WgMY-
data = data[j]; /:z}WAW
data[j] = temp; 7 G~MqnO|
} !:c7I@
} "sUe:F;