[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; t;Rdrk
} I& `>6=)
int i1=l; 'k9?n)<DW
int i2=mid+1; `mI%Se
for(int cur=l;cur<=r;cur++){ n(mS
if(i1==mid+1) `f@VX :aL}
data[cur]=temp[i2++]; l*+"0
else if(i2>r) j'?^<4i
data[cur]=temp[i1++]; 9}4EW4
else if(temp[i1] data[cur]=temp[i1++]; )6S;w7
else "dKYJ&$
data[cur]=temp[i2++]; ")q{>tV
} ~/@5&ajz
} NMSpi[dr
a=55bEn
} ~~.v*C[
4b"%171
改进后的归并排序: HzO6hb{jJO
YzcuS/~x
package org.rut.util.algorithm.support; KAR XC,z
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import org.rut.util.algorithm.SortUtil; X9:(}=E V
LE15y>
/** )8c`o
* @author treeroot sFEkxZi<
* @since 2006-2-2 /mB'Fn6)
* @version 1.0 "CEy r0h
*/ }T?MWcG4
public class ImprovedMergeSort implements SortUtil.Sort { qM`XF32A$
b&$ ?.z
private static final int THRESHOLD = 10; =A6/D
`0r=ND5.
/* (1bz.N8z
* (non-Javadoc) `.# l_-U{
* Oc;/'d2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?kICYtY:_b
*/ M y:9
public void sort(int[] data) { CqXDz
int[] temp=new int[data.length]; s*gyk
mergeSort(data,temp,0,data.length-1); z.H*"r
} XUD/\MoV
kT(}>=]g
private void mergeSort(int[] data, int[] temp, int l, int r) { &FWPb#
int i, j, k; mx#H+:}&r
int mid = (l + r) / 2; qAH@)}
if (l == r) \WM*2&
return; #5?Q{ORN o
if ((mid - l) >= THRESHOLD) Ozk^B{{o
mergeSort(data, temp, l, mid); o6pnTu
else TQ?D*&
insertSort(data, l, mid - l + 1); Sx,O)
if ((r - mid) > THRESHOLD) :E|HP#iwu
mergeSort(data, temp, mid + 1, r); 1i}Rc:
else mT.p-C
insertSort(data, mid + 1, r - mid); O&#bC
<v?9:}
for (i = l; i <= mid; i++) { >4:W:;R
temp = data; _tR%7%3*
} U.oxLbJ`
for (j = 1; j <= r - mid; j++) { JM{S49Lx
temp[r - j + 1] = data[j + mid]; '676\2.
} =&*:)
int a = temp[l]; ,jBd3GdlZ
int b = temp[r]; H_'i.t 'SS
for (i = l, j = r, k = l; k <= r; k++) { YJw9 d]
if (a < b) { oZ1#.o{
data[k] = temp[i++]; ;lST@>
a = temp; d7A08l{
} else { pRtxyL"y
data[k] = temp[j--]; }>JFO:v&
b = temp[j]; @GGzah#
} 9l+`O0.@
} QD LXfl/
} DBl.bgf
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/** 6h N~<
* @param data @18"o"c7j
* @param l 40pGu
* @param i d:0RDK-}s
*/ AElx #`T
private void insertSort(int[] data, int start, int len) { [L1pDICoy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >n@?F[Y
} c'_-jdi`>_
} ;T2)nSAqt
} wTFM:N
} 'kc_OvVA
)5lo^Qb
堆排序： b=a&!r5M
r)<]W@Pr
package org.rut.util.algorithm.support; :Ia3yi#
rE"`q1b#
import org.rut.util.algorithm.SortUtil; p(MhDS\J
UYH;15s
/** >Fm}s,
* @author treeroot ]RmQ*F-
* @since 2006-2-2 -6MgC9]
* @version 1.0 yy4QY%
*/ ?7@Y=7BS4
public class HeapSort implements SortUtil.Sort{ @EzSosmF
)t{oyBT
/* (non-Javadoc) chsjY]b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2Z6#3~
*/ lIO.LF3
public void sort(int[] data) { 58*s\*V`\
MaxHeap h=new MaxHeap(); Qi|jL*mj&
h.init(data); buGW+TrWY
for(int i=0;i h.remove(); 3%m2$\
System.arraycopy(h.queue,1,data,0,data.length); w[z^B&
} !v|j C
/-<S FT`
private static class MaxHeap{ 9|T%q2O
nMD^x
void init(int[] data){ ahkSEE{
this.queue=new int[data.length+1]; |")}p=
for(int i=0;i queue[++size]=data; [JFmhLP9
fixUp(size); v$"#9oh
} V\@h<%{^%7
} z8M^TV
\4I1wdd|^
private int size=0; 9iWDEk
$j^Jj
private int[] queue; goi.'8M|/b
(,PO(
public int get() { JxI}#iA
return queue[1]; vpx8GiV
} AwB ]0H
1?"vKm
public void remove() { r00waw>C\
SortUtil.swap(queue,1,size--); p~I+ZYWF'
fixDown(1); nnIBN4
} 7X.rGJZq
file://fixdown ;rpjXP
private void fixDown(int k) { km'3[}8o&
int j; A!s\;C
while ((j = k << 1) <= size) { sM({u/
if (j < size %26amp;%26amp; queue[j] j++; >e*m8gm#
if (queue[k]>queue[j]) file://不用交换 A1@tp/L=o
break; ~fB: >ceD
SortUtil.swap(queue,j,k); ivC1=+
k = j; "K`B'/08^
} vrdlI^
} wly#|
private void fixUp(int k) { +vaz gO<u
while (k > 1) { Ixg.^>62
int j = k >> 1; KDgJ~T
if (queue[j]>queue[k]) F{ J>=TC
break; :kqJ~
SortUtil.swap(queue,j,k); Dna0M0
k = j; $"C]y$}
} bLGgu#
} r#*kx#"
lDO9GNz$
} j]}A"8=1
XodA(73`i
} 2V_C_5)1
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SortUtil： `h_,I R<
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package org.rut.util.algorithm; }N(-e$88
E"bYl3
import org.rut.util.algorithm.support.BubbleSort; mv%fX2.
import org.rut.util.algorithm.support.HeapSort; lz@fXaZM
import org.rut.util.algorithm.support.ImprovedMergeSort; ZO{uG(u
import org.rut.util.algorithm.support.ImprovedQuickSort; zx'G0Z9]
import org.rut.util.algorithm.support.InsertSort; .MMFN}1O
import org.rut.util.algorithm.support.MergeSort; Hv(0<k6oH
import org.rut.util.algorithm.support.QuickSort; ?`Qw=8]`
import org.rut.util.algorithm.support.SelectionSort; \-N 4G1
import org.rut.util.algorithm.support.ShellSort; 5b3Wt7
<~t38|Ff@
/** H1rge<
* @author treeroot z$oA6qB)
* @since 2006-2-2 z:bxnM2\
* @version 1.0 F"VNz^6laV
*/ 4m$nVv
public class SortUtil { ,x!P|\w.G{
public final static int INSERT = 1; [sp=nG7i&
public final static int BUBBLE = 2; Rv ?Go2
public final static int SELECTION = 3; : m$cnq~h
public final static int SHELL = 4; LEvdPG$)
public final static int QUICK = 5; G`PSb<h\oc
public final static int IMPROVED_QUICK = 6; ?JDZDPVJ)
public final static int MERGE = 7; !YSAQi;I
public final static int IMPROVED_MERGE = 8; NqvL,~1G
public final static int HEAP = 9; H7?C>+ay
T{d7,.:
public static void sort(int[] data) { $-YS\R\9x
sort(data, IMPROVED_QUICK); xi8RE@gm
} P!:Y<p{=>
private static String[] name={ `%p}.X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _H>ABo
}; L B1ui
RS!~5nk5
private static Sort[] impl=new Sort[]{ c 6@!?8J
new InsertSort(), ]R\k@a|G
new BubbleSort(), L)&?$V
new SelectionSort(), CUfD[un2D
new ShellSort(), e@*Gnh<&
new QuickSort(), E.Xfb"]
new ImprovedQuickSort(), a h>k=t8(
new MergeSort(), cW;to Q!P
new ImprovedMergeSort(), /=>z|?z3
new HeapSort() :M9'wg
}; n^'ip{
.5|AX6p+^
public static String toString(int algorithm){ tKrr5SRb
return name[algorithm-1]; #qT97NQ
} ]H0BUg
oQI3Yz
public static void sort(int[] data, int algorithm) { B5*{85p(u
impl[algorithm-1].sort(data); +u' ?VBv
} U0t/(Jyg
?~uTbNR
public static interface Sort { B2:6=8<
public void sort(int[] data); 1U.se`L
} Y>geP+-
%@3AA<
public static void swap(int[] data, int i, int j) { >w+WG0Z K
int temp = data; @|(mR-Jj
data = data[j]; qY`)W[
data[j] = temp; [5,aBf)X
} > xkl7D
} 1s8v E f