[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; S^@I4Z
} K)Nbl^6x
int i1=l; N#;k;Z'iL
int i2=mid+1; v5|X=B>&>
for(int cur=l;cur<=r;cur++){ y@;4F n/
if(i1==mid+1) oh '\,zpL
data[cur]=temp[i2++]; |5wuYG
else if(i2>r) 1Ftl1uf
data[cur]=temp[i1++]; c3gy{:lb
else if(temp[i1] data[cur]=temp[i1++]; 9})!~r;|
else 41<.e`{
data[cur]=temp[i2++]; 8t$a8 PE
} t5z6{`
} `L(AvSR
Ojkbv
} ^|6%~jkD5
^@ GE1
改进后的归并排序: f:k3j}&
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package org.rut.util.algorithm.support; g1Q^x/
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import org.rut.util.algorithm.SortUtil; Ve,_;<F]S
`x"0
/** `0rEV_$
* @author treeroot A#W%ud4
* @since 2006-2-2 71+J{XOC
* @version 1.0 GNXQD}L?b?
*/ TxhTK5#f
public class ImprovedMergeSort implements SortUtil.Sort { //G5lW/*
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private static final int THRESHOLD = 10; -{>Nrx|
U9;C#9E
/* 5|ih>?C/(
* (non-Javadoc) '#SacJ\L7
* Q{Gi**<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #,O<E@E
*/ h:[PO6GdX
public void sort(int[] data) { k--.g(T
int[] temp=new int[data.length]; K1Tq7/N
mergeSort(data,temp,0,data.length-1); `zHtfox!
} A6'G%of
?op6_a-wm
private void mergeSort(int[] data, int[] temp, int l, int r) { hq.z:D
int i, j, k; cLH|;
int mid = (l + r) / 2; x.r~e)x=
if (l == r) t;9f7~
return; [8/E ;h
if ((mid - l) >= THRESHOLD) 3LZ0EYVL
mergeSort(data, temp, l, mid); @]Ye36v0#L
else hu-fwBK
insertSort(data, l, mid - l + 1); XljiK8q;%
if ((r - mid) > THRESHOLD) rUkiwqr~E
mergeSort(data, temp, mid + 1, r); Y%$57,Bu n
else EA4aZ6%
insertSort(data, mid + 1, r - mid); m,3?*0BMp=
cpB$bC](
for (i = l; i <= mid; i++) { 1Y410-.3w{
temp = data; S%b7NK
} ZoB?F
for (j = 1; j <= r - mid; j++) { 7-+X -Y?
temp[r - j + 1] = data[j + mid]; 8#S|jBV
} rr2'bf<]
int a = temp[l]; b1>%%#
int b = temp[r]; !`vm7FN"u
for (i = l, j = r, k = l; k <= r; k++) { 5AR\'||u
if (a < b) { 4J2NIFZ
data[k] = temp[i++]; _;J7#j~}
a = temp; E.?|L-fy
} else { oUEpzv,J
data[k] = temp[j--]; 3Juhn5&N
b = temp[j]; MJ>9[hs
} xaWd\]UF
} }U'fPYYi8
} JoA^9AYhR
L<Q1acoZm
/** 8^;[c
* @param data )`Tny]M
* @param l .:c^G[CQ^9
* @param i <tAn2e!
*/ _s!(9
private void insertSort(int[] data, int start, int len) { in-/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qgw:Q
} 5aw#!K=J'
} w-[WJ:2.
} 02&mM%#
} bF:vD&Sf
;}3wT,=sN
堆排序： w:Fes
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package org.rut.util.algorithm.support; YMnG-'^Z
r4jW=?|
import org.rut.util.algorithm.SortUtil; 7ZS5u+o
M)6_Tal
/** ,T_HE3K
* @author treeroot =35^k-VS
* @since 2006-2-2 VB*$lxX
* @version 1.0 ="3Hc=1?R
*/ BOn2`|oLuF
public class HeapSort implements SortUtil.Sort{ [#n~ L6
2(LS<HqP[
/* (non-Javadoc) NFPW#-TF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :h?"0,
*/ {AqN@i
public void sort(int[] data) { B[ooT3V
MaxHeap h=new MaxHeap(); R>[2}R30
h.init(data); R_.C,mR ?
for(int i=0;i h.remove(); ?stx3sZ
System.arraycopy(h.queue,1,data,0,data.length); WA~|:S+
} _S/bwPj|~y
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private static class MaxHeap{ E=GCq=Uw
(L8H.|.
void init(int[] data){ W'rft@J$
this.queue=new int[data.length+1]; wH~Q4)#=o
for(int i=0;i queue[++size]=data; ]q7\
fixUp(size); aDR<5_Yb
} k&ujr:)5Y5
} ( }5k"9Z
_Qs)~
private int size=0; 5NbI Vz
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private int[] queue; +wwpaR`
J`;G9'n2
public int get() { =(K;z9OR
return queue[1]; L{Epkay,{
} :51Q~5k4
&CF74AN#
public void remove() { cysYjuI i
SortUtil.swap(queue,1,size--); :gVz}/C.@
fixDown(1); il\#R%';5
} Lo @mQ
file://fixdown 0@{K'm/
private void fixDown(int k) { vLJ<_&6
int j; ZU7e1VaZM
while ((j = k << 1) <= size) { UL$^zR3%d
if (j < size %26amp;%26amp; queue[j] j++; =:v\}/
if (queue[k]>queue[j]) file://不用交换 C78YHjy
break; jwyJ=W-
SortUtil.swap(queue,j,k); rPkV=9ull,
k = j; bV|:MW<Wv
} <_8\}!
} y _>HQs,:
private void fixUp(int k) { ;2@MPx
while (k > 1) { _sbZyL
int j = k >> 1; ~<Uwumv
if (queue[j]>queue[k]) tx Lo=
break; KnbT2
SortUtil.swap(queue,j,k); / _-?NZ
k = j; b\"JXfw
} 2sjV*\Udf
} 'y}l9alF
-o6K_R}R
} h|mh_T{+
*5sr\b4#S
} "d/x`Dx
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SortUtil： 724E(?>J
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package org.rut.util.algorithm; 20d[\P(.
f8+($Ys
import org.rut.util.algorithm.support.BubbleSort; LR]P?
import org.rut.util.algorithm.support.HeapSort; +*a:\b"fx
import org.rut.util.algorithm.support.ImprovedMergeSort; G#@o6r
import org.rut.util.algorithm.support.ImprovedQuickSort; v)!Rir5
import org.rut.util.algorithm.support.InsertSort; 'h%)@q)J)
import org.rut.util.algorithm.support.MergeSort; XBUO
import org.rut.util.algorithm.support.QuickSort; M/:kh,3
import org.rut.util.algorithm.support.SelectionSort; fBS;~;l
import org.rut.util.algorithm.support.ShellSort; E@hvO%
Q?L-6]pg
/** fxXZ^#2wX
* @author treeroot ^;$a_eR
* @since 2006-2-2 )MHvuk:I)
* @version 1.0 E).Nu
*/ L,p5:EW8.
public class SortUtil { {tk42}8k
public final static int INSERT = 1; IX']s;b
public final static int BUBBLE = 2; bT,]=h"0
public final static int SELECTION = 3; U PGS
public final static int SHELL = 4; acdaDY
public final static int QUICK = 5; M'$n".,p
public final static int IMPROVED_QUICK = 6; lE`hC#m
public final static int MERGE = 7; R"];`F(#
public final static int IMPROVED_MERGE = 8; gsGwf[XdJ
public final static int HEAP = 9; o>311(:
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public static void sort(int[] data) { Z9cch-u~
sort(data, IMPROVED_QUICK); @ T'!;)
} Dh BUMDoB
private static String[] name={ ;yqJEj_m(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ce.'STm=
}; (\e,,C%;
W=&\d`><k
private static Sort[] impl=new Sort[]{ HtgVD~[]
new InsertSort(), 8TD:~ee
new BubbleSort(), ;iy]mPd
new SelectionSort(), `8\_ ]w0
new ShellSort(), /P<RYA~
new QuickSort(), %L=roqz
new ImprovedQuickSort(), _' Xt
new MergeSort(), R4 ;^R
new ImprovedMergeSort(), u^s{r`/
new HeapSort() =&U JFu
}; NYM$0v`0YK
e!d& #ofw|
public static String toString(int algorithm){ ,6~c0]/
return name[algorithm-1]; ah>;wW!6/
} ,u-i9`B
fCJ:QK!
public static void sort(int[] data, int algorithm) { s+2\uMwf*
impl[algorithm-1].sort(data); |#^u%#'[2
} "KcSOjvJ
Z=|:D,&
public static interface Sort { t~)w921>
public void sort(int[] data); wr~# rfH
} MIub^ $<C
.!\y<9
public static void swap(int[] data, int i, int j) { lfOF]Kiqr
int temp = data; 5]:fkx
data = data[j]; oil s;*q
data[j] = temp; R{NmWj['Mg
} 'C]zB'H=
} _&DI_'5q+