[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; XVkw/l
} N"}>);r
int i1=l; Xf_#O'z
int i2=mid+1; Kf1J;*i|\
for(int cur=l;cur<=r;cur++){ U|]cB
if(i1==mid+1) S=ZZ[E_~S
data[cur]=temp[i2++]; 9v_s_QkL2
else if(i2>r) PJiU2Y33
data[cur]=temp[i1++]; o`QNZN7/}
else if(temp[i1] data[cur]=temp[i1++]; x(._?5
else E{EO9EI
data[cur]=temp[i2++]; KJRAW]?{
} & ?xR
} 0S^&A?$=
qmFG
} ydyTDn
g]lEG>y1R
改进后的归并排序: p;>A:i
YZ5,K6u
package org.rut.util.algorithm.support; `mzlOB
M2Jf-2
import org.rut.util.algorithm.SortUtil; Ux7LN@4og
Ez;Qo8
/** (/uAn2
* @author treeroot 7b+r LyS0
* @since 2006-2-2 h<e
* @version 1.0 tGgxID
*/ <Cv(@A->
public class ImprovedMergeSort implements SortUtil.Sort { [K&%l]P7
5>I-? Ki
private static final int THRESHOLD = 10; JcWp14~e
4d`YZNvZW/
/* :ZM9lBYh
* (non-Javadoc) uX*2Rs$s
* }3^m>i*8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *[{j'7*cc
*/ sSh{.XuB+3
public void sort(int[] data) { &1$d`>fn
int[] temp=new int[data.length]; r|EN5
mergeSort(data,temp,0,data.length-1); aOH|[
} ^K;k4oK
se\fbe^0
private void mergeSort(int[] data, int[] temp, int l, int r) { "iA0hA
int i, j, k; N[po)}hp
int mid = (l + r) / 2; k5I;Y:~`
if (l == r) [3jJQ3O,
return; $AZYY\1
if ((mid - l) >= THRESHOLD) g}NO$?ndg
mergeSort(data, temp, l, mid); %"0,o$
else xj3qOx$
insertSort(data, l, mid - l + 1); WeM38&dWY
if ((r - mid) > THRESHOLD) kJJT`Ba&/
mergeSort(data, temp, mid + 1, r); +4s]#{mP
else $Z:O&sD{
insertSort(data, mid + 1, r - mid); 2)n`Bd
o]4]fLQ
for (i = l; i <= mid; i++) { itg_+%^R
temp = data; j(=w4Sd_W
} hm,{C
for (j = 1; j <= r - mid; j++) { I/`"lAFe
temp[r - j + 1] = data[j + mid]; 8@t8P5(vL
} OP`f[lCiL
int a = temp[l]; inWLIXC,
int b = temp[r]; --WQr]U/
for (i = l, j = r, k = l; k <= r; k++) { /K#k_k
if (a < b) { I8Aq8XBw
data[k] = temp[i++]; _~z oMdT!
a = temp; 5dePpFD5
} else { ~w?02FU
data[k] = temp[j--]; e$J>z {
b = temp[j]; W:_-I4q~
} &BRk<iwV
} J!2Z9<q5
} /eI|m9ke
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/** 0 0N[ :%
* @param data .xN<<+|_v'
* @param l X`.##S KC
* @param i {y9G "
*/ i"h\*B=
private void insertSort(int[] data, int start, int len) { w:t~M[kTW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $*ff]>#
} DZSS
} V4[-:k
} !Y ,7%
} AS7L
ubwM*P
堆排序： jH< #)R
1&|]8=pG7
package org.rut.util.algorithm.support; {DRk{>K,
*?FVLE
import org.rut.util.algorithm.SortUtil; .d<K`.O;
UxGu1a
/** (BEe^]f
* @author treeroot YvJFZ_faX
* @since 2006-2-2 lq-KM8j
* @version 1.0 &t=:xVn-M
*/ \ %Mcvb.?
public class HeapSort implements SortUtil.Sort{ 8!E.3'jb
|V a:*3u
/* (non-Javadoc) 'Aq^z%|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P([!psgu
*/ 5#GMp
public void sort(int[] data) { kelBqJ-,p
MaxHeap h=new MaxHeap(); ` ,\b_SFg
h.init(data); "w:h
for(int i=0;i h.remove(); !"N,w9MbD
System.arraycopy(h.queue,1,data,0,data.length); /6')B !&
} ,"EaZ/Bl/
2lTt
private static class MaxHeap{ }J#HIE\RG
]l,D,d81
void init(int[] data){ "^#O7.oVi+
this.queue=new int[data.length+1]; "`qk}n-
for(int i=0;i queue[++size]=data; P~j#8cH7
fixUp(size); Bgxk>Y
} S2$66xr#
} ,Kv6!ib6Q
# EvRm
private int size=0; 7m2iL#5[
1#vu)a1+b
private int[] queue; 287j,'vR
^B<-.(F
public int get() { 4fi4F1f
return queue[1]; mkSu $c
} A(2 0+
90vWqL!
public void remove() { ZFtx&vrP
SortUtil.swap(queue,1,size--); T8S&9BM7
fixDown(1); 1aAOT6h
} ~O}r<PQ
file://fixdown D_l$"35?
private void fixDown(int k) { zDvV%+RW)
int j; A%^?z.
while ((j = k << 1) <= size) { ctP+ECH
if (j < size %26amp;%26amp; queue[j] j++; n9Fq^^?
if (queue[k]>queue[j]) file://不用交换 evyjHcCx
break; RN`TUCQL
SortUtil.swap(queue,j,k); Xh8U}w<k6
k = j; SoziFI
} G<CD4:V
} d:'{h"M6
private void fixUp(int k) { *$A`+D9
while (k > 1) { hkPMu@BI
int j = k >> 1; hi(b\ABx
if (queue[j]>queue[k]) 5iw\F!op:
break; #(tdJ<HvC|
SortUtil.swap(queue,j,k); z4YDngf=4
k = j; ntIR#fB
} /dCsZA
} ~cm4e>o
$n<1D -0!r
} nvR%Ub x
WO>,=^zPJ
} gt8dFcm|s
f#l9rV"@g
SortUtil： e)}E&D;${
[A~?V.G
package org.rut.util.algorithm; #._JB-,'
/we]i1-9
import org.rut.util.algorithm.support.BubbleSort; -53c0g@X
import org.rut.util.algorithm.support.HeapSort; =X'[r
import org.rut.util.algorithm.support.ImprovedMergeSort; /`M#
import org.rut.util.algorithm.support.ImprovedQuickSort; e#oK% {A
import org.rut.util.algorithm.support.InsertSort; ;r@=[h
import org.rut.util.algorithm.support.MergeSort; 7&id(&y/
import org.rut.util.algorithm.support.QuickSort; ,1I-%6L
import org.rut.util.algorithm.support.SelectionSort; {iyJHY
import org.rut.util.algorithm.support.ShellSort; N^QxqQ~
LuZlGm
/** :}NheRi
* @author treeroot X!|eRA~o
* @since 2006-2-2 ]Gi&:k
* @version 1.0 &J/EBmY[
*/ dQ*^WNUB
public class SortUtil { N8nt2r<h
public final static int INSERT = 1; UlWmf{1%]?
public final static int BUBBLE = 2; >,,`7%Rv
public final static int SELECTION = 3; Ar)EbGId
public final static int SHELL = 4; d./R;Z- I{
public final static int QUICK = 5; @;O"-7Kk
public final static int IMPROVED_QUICK = 6; ?GX@&_
public final static int MERGE = 7; b}(c'W*z%
public final static int IMPROVED_MERGE = 8; ;gL{*gR]S
public final static int HEAP = 9; mX>N1zAz
@G;9eh0$
public static void sort(int[] data) { +s<6eHpm
sort(data, IMPROVED_QUICK); {>km]CG
} reR@@O
private static String[] name={ @v`.^L{P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ViW2q"4=
}; Ko&4{}/
1V]ws}XW
private static Sort[] impl=new Sort[]{ GG%;~4#2
new InsertSort(), azFJ-0n@"
new BubbleSort(), &j~9{ C
new SelectionSort(), f@`|2wG
new ShellSort(), /SJ><
new QuickSort(), N4x5!00
new ImprovedQuickSort(), 8pEA3py
new MergeSort(), A,&711Y
new ImprovedMergeSort(), [.&JQ
new HeapSort() r],%:imGr
}; COsy.$|4
yf*'=q
public static String toString(int algorithm){ ^W sgAyCB
return name[algorithm-1]; </'n={+q
} 0xZ^ f}@L
^P{y^@XI
public static void sort(int[] data, int algorithm) { J#Q>dC7
impl[algorithm-1].sort(data); :^W}$7$T
} <cZ/_+H%C
>&\.{ aj
public static interface Sort { ~0+<-T
public void sort(int[] data); zf8SpQ2~
} CA|l| t^
ts<\n-f
public static void swap(int[] data, int i, int j) { ~rb]u Ny-
int temp = data; kxJs4BY0
data = data[j]; E!ZLVR.K
data[j] = temp; uhj]le!
} ?#a&eW
} \s[L=^!