[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; R@&?i=gk
} )Yrr%f`\
int i1=l; h~:H?pj3g
int i2=mid+1; h~ZNHSP:
for(int cur=l;cur<=r;cur++){ "~Us#4>
if(i1==mid+1) 0OEtU5lf`y
data[cur]=temp[i2++]; 7F~xq#Wi#
else if(i2>r) j~.u>4
data[cur]=temp[i1++]; jWhD5k@v
else if(temp[i1] data[cur]=temp[i1++]; yG4MUf6
else sv@}x[L
data[cur]=temp[i2++]; w2' 3S#nZ
} [-QK$~[ g
} h%u?lW
IG>>j}
} ^T=5zqRD
bnIf}ut-G
改进后的归并排序: ,znL,%s
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package org.rut.util.algorithm.support; > d^r">!,
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import org.rut.util.algorithm.SortUtil; c'SM>7L
/1U,+g^O>
/** aQC7V!v
* @author treeroot E|\3f(aF
* @since 2006-2-2 V`U/'N-ay
* @version 1.0 ;B(;2.<"J
*/ =GLYDV
public class ImprovedMergeSort implements SortUtil.Sort { f7K8m|
omr:C8T>
private static final int THRESHOLD = 10; -B",&yTV
2zwuvgiZ
/* XNy:0C
* (non-Javadoc) *%;6P5n%
* +h9`I/R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MV7}
*/ O'Vh{JHf
public void sort(int[] data) { 8}]l9"q(
int[] temp=new int[data.length]; 3huzz<n3
mergeSort(data,temp,0,data.length-1); +HYN$>
} N <ja6Ac
54bF)<+
private void mergeSort(int[] data, int[] temp, int l, int r) { (gFQK[
int i, j, k; `;R|V
int mid = (l + r) / 2; <ihhV e
if (l == r) Gt?!E6^!
return; f45x%tha%
if ((mid - l) >= THRESHOLD) tPQ2kEW
mergeSort(data, temp, l, mid); }6F_2S3c
else \t[ hg
insertSort(data, l, mid - l + 1); }kpfJLjY
if ((r - mid) > THRESHOLD) }x>}:"P;W
mergeSort(data, temp, mid + 1, r); bwv/{3G,Ys
else vr5<LNCLQ
insertSort(data, mid + 1, r - mid); (8+.#1!*
hrUm}@d
for (i = l; i <= mid; i++) { \3,$YlG
temp = data; %jYQ
} 8.6no
for (j = 1; j <= r - mid; j++) { 9N`+ O
temp[r - j + 1] = data[j + mid]; Z1E`I89<
} Q3'(f9 x
int a = temp[l]; ] `b<"
int b = temp[r]; WlF+unB!9
for (i = l, j = r, k = l; k <= r; k++) { )cfp(16
if (a < b) { 7/$nA<qM
data[k] = temp[i++]; nI((ki}v
a = temp; $yP'k&b!
} else { 9J't[( u|u
data[k] = temp[j--]; qen44;\L
b = temp[j]; 7R% PVgS4x
} ]0at2
} My`josJ`Pb
} $fq-wl-=
n3-GnVC][
/** 4+Li)A:4.
* @param data p7?CeyZ-V
* @param l k:&?$
* @param i NXC~#oG
*/ ^Y1AeJ$L
private void insertSort(int[] data, int start, int len) { 0jl:Yzo&\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d|D'&&&c
} -;W\f<q]
} \{Ox@
} %tklup]LF8
} M9ter&
y&KoL\
堆排序： qkZ5+2m
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package org.rut.util.algorithm.support; 83p$!8]u
59"Nn\}3gE
import org.rut.util.algorithm.SortUtil; ~Sn5;g8+\
^"6D0!'N
/** =B,_d0Id
* @author treeroot d6Q :{!Sd"
* @since 2006-2-2 MfZ}xu
* @version 1.0 ~0Q\Lp);
*/ :c+a-Py $E
public class HeapSort implements SortUtil.Sort{ N`L' 4v)
PG-cu$\??
/* (non-Javadoc) Y_aP:+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w2M IY_N?
*/ ~I8"l@H>
public void sort(int[] data) { q^T&A[hMPx
MaxHeap h=new MaxHeap(); ID{Pzmt-
h.init(data); 8O;rp(N.n
for(int i=0;i h.remove(); }SJLBy0
System.arraycopy(h.queue,1,data,0,data.length); sbq44L)
} H8=vQy
/(WX!EEsB
private static class MaxHeap{ }AeE|RNc
HC<BGIgL
void init(int[] data){ \|b1s @c8
this.queue=new int[data.length+1]; M25z<Y
for(int i=0;i queue[++size]=data; t"!8
fixUp(size); 3qV>TE]6,
} [4+a 1/^
} 4p/V6kr&r
@zq\z$
private int size=0; tZc.%TU
=":V WHf
private int[] queue; =."WvBKg
z?b(|f\!
public int get() { ADwwiq#E
return queue[1]; ;]O 7^s#v
} Rp4BU"&sU
f@x( ,p
public void remove() { 3<1HqU
SortUtil.swap(queue,1,size--); R;Ix<y{U
fixDown(1); Hhce:E@K
} C>(M+qXL+
file://fixdown *Tlws
private void fixDown(int k) { /n<Ncf
int j; ?-6x]l=]
while ((j = k << 1) <= size) { O}\"$n>
if (j < size %26amp;%26amp; queue[j] j++; jW+VUF-t
if (queue[k]>queue[j]) file://不用交换 pN^G[
break; aGzdur
SortUtil.swap(queue,j,k); VHXR)}
k = j; Z({`9+/>u
} m= beB\=
} 1PT_1[eAR
private void fixUp(int k) { A?{aUQB~|
while (k > 1) { t9-\x
int j = k >> 1; .tHv4.ob
if (queue[j]>queue[k]) q}76aa0e
break; E)Zd{9A5)
SortUtil.swap(queue,j,k); uvK%d\d
k = j; ]P ?#lO6
} ;r@R (Squ
} bUg2Bm!y
+Muia5G
} y[7xK}`_
dQ2i{A"BKz
} cK}
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SortUtil： mYs->mg1
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package org.rut.util.algorithm; [8J}da}
~Sem_U`G
import org.rut.util.algorithm.support.BubbleSort; '' A[`,3
import org.rut.util.algorithm.support.HeapSort; MAhPO!e5.
import org.rut.util.algorithm.support.ImprovedMergeSort; $R#L@iL-
import org.rut.util.algorithm.support.ImprovedQuickSort; ]e3}9.
import org.rut.util.algorithm.support.InsertSort; +`vZg^_c`
import org.rut.util.algorithm.support.MergeSort; Vgb>3]SU
import org.rut.util.algorithm.support.QuickSort; X72X:"
import org.rut.util.algorithm.support.SelectionSort; -H]f@|AOw
import org.rut.util.algorithm.support.ShellSort; `\FjO"
o5G"J"vxe
/** s$y#Ufz
* @author treeroot /v ;Kb|e
* @since 2006-2-2 a0W\?
* @version 1.0 arH\QPaka'
*/ kp>Z/kt
public class SortUtil { 36Y[7m=
public final static int INSERT = 1; I z=w2\r
public final static int BUBBLE = 2; (w:ACJ[[
public final static int SELECTION = 3; F>-@LOqHy
public final static int SHELL = 4; )aA9z(x
public final static int QUICK = 5; !5 :[XvI#
public final static int IMPROVED_QUICK = 6; 5qB=@O]|G;
public final static int MERGE = 7; u#k6v\/
public final static int IMPROVED_MERGE = 8; YbBH6RZr
public final static int HEAP = 9; \ rWgA
9PfU'm|h
public static void sort(int[] data) { 1kw4'#J8
sort(data, IMPROVED_QUICK); %IXW|mi
} %L|bF"K5;
private static String[] name={ WMl^XZO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /Gv$1t^a
}; zMqEMx9
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private static Sort[] impl=new Sort[]{ ]mT} \b
new InsertSort(), B]}V$*$\?
new BubbleSort(), M4PUJZ]
new SelectionSort(), iBW6<2@oZF
new ShellSort(), RvZ-w$E&?
new QuickSort(), T[=cKYp8\
new ImprovedQuickSort(), Qi]Z)v{^
new MergeSort(), cTx/Y&\9
new ImprovedMergeSort(), 6 &Aa b56
new HeapSort() 3kQ8*S
}; X35U!1Y\
29DWRJU
public static String toString(int algorithm){ ;+KgujfU
return name[algorithm-1]; ]@}BdMlHp
} )P+GklI{4
3NZFW{u
public static void sort(int[] data, int algorithm) { wupD
impl[algorithm-1].sort(data); 2 3w{h d
} cW^)$>A
i1Sc/
public static interface Sort { O7*i;$!R
public void sort(int[] data); 3s$.l}
} To? bp4
a-2 {x2O
public static void swap(int[] data, int i, int j) { zW`koRH@
int temp = data; U+M?<4J)"
data = data[j]; cyeDZ)
data[j] = temp; 0\^2HjsJ
} ]Wm ?<7H
} &nw~gSe