[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; p["20?^
} 7!, p,|K
int i1=l; $5yH8JU
int i2=mid+1; D|5Fo'O^AV
for(int cur=l;cur<=r;cur++){ k$K>ml/h
if(i1==mid+1) !L'O")!3
data[cur]=temp[i2++]; U| 1&=8l
else if(i2>r) )RwO2H
data[cur]=temp[i1++]; -+.-Ab7
else if(temp[i1] data[cur]=temp[i1++]; hrnY0
else V^p XbDRl
data[cur]=temp[i2++]; ^F$iD (f
} af2yng
} &uv7`VT
>:U{o!N`#_
} 6?jSe<4x
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改进后的归并排序: ^cYt4NHXn
PxZMH=
package org.rut.util.algorithm.support; xXc3#n
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import org.rut.util.algorithm.SortUtil; t.m C q4{
so\8.(7n
/** xHdv?69,
* @author treeroot N%+C5e<
* @since 2006-2-2 [kg*BaG:
* @version 1.0 [U?a %$G>
*/ 0\^K\J,.
public class ImprovedMergeSort implements SortUtil.Sort { ?9AtFT
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private static final int THRESHOLD = 10; ?t];GNU`l
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/* lw 9rf4RF
* (non-Javadoc) i/WiSwh:
* lilF _y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GGwHz]1L
*/ Ej64^*
public void sort(int[] data) { *+'l|VaVq\
int[] temp=new int[data.length]; Jx1JtnyP@
mergeSort(data,temp,0,data.length-1); c1Ta!p{%
} ns1@=f cO
5;-?qcb^w
private void mergeSort(int[] data, int[] temp, int l, int r) { N,NEg4 q[
int i, j, k; )OcG$H NK
int mid = (l + r) / 2; rY&Y58./
if (l == r) % 2lcc"'
return; 5%Q[X
if ((mid - l) >= THRESHOLD) rN^P//
mergeSort(data, temp, l, mid); eMC0 )B
else _-g?6q
insertSort(data, l, mid - l + 1); @=1kr ^i
if ((r - mid) > THRESHOLD) }7jg>3ng(
mergeSort(data, temp, mid + 1, r); %phv<AW
else Nt'u;0
insertSort(data, mid + 1, r - mid); 5hbQUF ,Q
F45UO%/P
for (i = l; i <= mid; i++) { zmMz6\ $
temp = data; C %o^AR
} +'!vm6
for (j = 1; j <= r - mid; j++) { V|8`]QW@
temp[r - j + 1] = data[j + mid]; {$mj9?n=v
} i.`RQZ$,/
int a = temp[l]; #<|q4a{8
int b = temp[r]; D#,P-0+%
for (i = l, j = r, k = l; k <= r; k++) { l6EDl0~r
if (a < b) { +p:@,_
data[k] = temp[i++]; p94 w0_m@|
a = temp; >Kc>=^=5
} else { K+_$ WT_
data[k] = temp[j--]; O.8{c;
b = temp[j]; BSu ]NOwe
} KzC`*U[
} ;ywQk| r
} n7S~nk
MzsDDP+h
/** hVcV_
* @param data ( nH3
* @param l U0:tE>3`
* @param i 2x7%6'
*/ mmj6YQ0a
private void insertSort(int[] data, int start, int len) { ;tF7GjEp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fXHNm$"n
} A[6$'IJ
} 3%W R
} iE$/ Rcp
} ?g$dz?^CK&
9H<6k*
堆排序： LAwl9YnG:
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package org.rut.util.algorithm.support; S?5z
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import org.rut.util.algorithm.SortUtil; Px)/`'D
3Yd)Fm
/** H+>l][
* @author treeroot ZdD]l*.\i
* @since 2006-2-2 Rz!E=1Y$
* @version 1.0 F*_mHYa;
*/ H[{ch t h
public class HeapSort implements SortUtil.Sort{ <eq93
IRZ?'Im
/* (non-Javadoc) ;?9u#FRtw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hfGA7P"
*/ <,Zk9 t&
public void sort(int[] data) { V}>0r+NL<
MaxHeap h=new MaxHeap(); `~"l a>}
h.init(data); &zF1&J58z
for(int i=0;i h.remove(); 7 C5m#e3
System.arraycopy(h.queue,1,data,0,data.length); ~pqp`
} PQ2u R
oh5fNx
private static class MaxHeap{ =B(zW.Gf
l#,WMu&
void init(int[] data){ v|XEC[F
this.queue=new int[data.length+1]; hNV"{V3`{
for(int i=0;i queue[++size]=data; g=;c*{
fixUp(size); 10JxfDceD
} S)[`Bm
} dOFxzk,g&R
> @ulvHL
private int size=0; P(W7,GD,k
/R< Q~G|\
private int[] queue; ipEsR/O
*fq=["O
public int get() { Nd&u*&S
return queue[1]; kg$<^:uX
} ~h;c3#wuc
+[JGi"ca
public void remove() { .( vS/
SortUtil.swap(queue,1,size--); eA>O<Z1>
fixDown(1); '$M=H.
} :Q\b$=,:
file://fixdown Xv'M\T}6C+
private void fixDown(int k) { ztG_::QtG]
int j; DB yRP-TH
while ((j = k << 1) <= size) { +>oVc\$
if (j < size %26amp;%26amp; queue[j] j++; 6P' m0
if (queue[k]>queue[j]) file://不用交换 <3QE3;4
break; tWi@_Rlx;
SortUtil.swap(queue,j,k); k[N46=u
k = j; 8KD7t&H
} +gTnq")wnI
} Pb.-Z@
private void fixUp(int k) { A8OV3h6]
while (k > 1) { S*:b\{[f>
int j = k >> 1; ;""V s6
if (queue[j]>queue[k]) v"L<{HN
break; 2Ni$ (`"
SortUtil.swap(queue,j,k); Jjz:-Uqq2
k = j; +E QRNbA
} )L`0VTw'M
} c{j0A;XMS
H~@E&qd
} 2-u>=r0L
QhK]>d.
} `,&h!h((
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SortUtil： ^zQ;8)ng
i7})VDsZ
package org.rut.util.algorithm; u(SdjLf:
)[6H!y5
import org.rut.util.algorithm.support.BubbleSort; jj#K[@u
import org.rut.util.algorithm.support.HeapSort; v\t$. _at
import org.rut.util.algorithm.support.ImprovedMergeSort; LI?rz<H!D
import org.rut.util.algorithm.support.ImprovedQuickSort; o\8yYX
import org.rut.util.algorithm.support.InsertSort; L^)&"6oSa
import org.rut.util.algorithm.support.MergeSort; _ 9Tv*@
import org.rut.util.algorithm.support.QuickSort; 5-bd1!o
import org.rut.util.algorithm.support.SelectionSort; QdG_zK>|e
import org.rut.util.algorithm.support.ShellSort; 9S.Uo[YY
pSASMc@
/** ?T70C9
* @author treeroot }7vX4{Yn
* @since 2006-2-2 l.lXto.6)
* @version 1.0 V$-IRdb
*/ APuG8 <R,
public class SortUtil { L!DP*XDp
public final static int INSERT = 1; G6Z2[Ej1
public final static int BUBBLE = 2; 4_`+&
public final static int SELECTION = 3; \no[>L]
public final static int SHELL = 4; 'rU [V+
public final static int QUICK = 5; y-{^L`%Mk
public final static int IMPROVED_QUICK = 6; ]E88zWDY`
public final static int MERGE = 7; ooByGQ90V:
public final static int IMPROVED_MERGE = 8; )=;0
public final static int HEAP = 9; on+ c*#
a>Uk<#>2?a
public static void sort(int[] data) { 6.2_UN^<
sort(data, IMPROVED_QUICK); d)(61
} :Cw|BX@??U
private static String[] name={ S[{#AX=0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '6fMF#X4F
}; %K /=7
mT>56\63
private static Sort[] impl=new Sort[]{ x9~d_>'A
new InsertSort(), 7f'9Dm`
new BubbleSort(), O(h4;'/E
new SelectionSort(), X&t)S?eCos
new ShellSort(), 2Q)"~3
new QuickSort(), y:D|U!o2V
new ImprovedQuickSort(), *8fnxWR
new MergeSort(), @P4fR7
new ImprovedMergeSort(), LqPn$rZ|$
new HeapSort() :p(3Ap2TY
}; gc7S_D~;
"o`N6@[w^
public static String toString(int algorithm){ $k V^[
return name[algorithm-1]; SPeSe/
} 6YQ&+4
sE-E\+
public static void sort(int[] data, int algorithm) { [(5;jUmF@
impl[algorithm-1].sort(data); !t{3IE
} ]k_@F6 A
D&/(Avx.
public static interface Sort { ^~0\d;l_
public void sort(int[] data); v1QE|@
} fnG&29x
UC;_}>
public static void swap(int[] data, int i, int j) { 0Oc' .E9
int temp = data; pcv(P
data = data[j]; x,STt{I=
data[j] = temp; *]p]mzc
} C6ZM#}I$l
} $OHY^IE(