[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; - O"i3>C
} 9_fePS|Z4
int i1=l; wh:1PP
int i2=mid+1; aS|wpm)K>8
for(int cur=l;cur<=r;cur++){ * MM[u75
if(i1==mid+1) }X;U|]d
data[cur]=temp[i2++]; OzT#1T1'c
else if(i2>r) Dml*T(WM>
data[cur]=temp[i1++]; XJ!(F#zc
else if(temp[i1] data[cur]=temp[i1++]; o{*ay$vA]
else dbS +
data[cur]=temp[i2++]; /D_+{dtE
} `]$?uQ
} M+wt__vHf
#a| L3zR5v
} $jd<v1"o
aTGdmj!
改进后的归并排序: A=Dhod
wFlvi=n/
package org.rut.util.algorithm.support; e75UMWaeC
<Fs-3(V+\
import org.rut.util.algorithm.SortUtil; AGYm';z3
7GZgu$'
/** BpO9As 1um
* @author treeroot w:o-klKXY
* @since 2006-2-2 ,jy*1Hjd
* @version 1.0 ;r=b|B9c
*/ b'ml=a#i0
public class ImprovedMergeSort implements SortUtil.Sort { V 'X;jC
:L0/V~D
private static final int THRESHOLD = 10; Lc<eRVNd,
+Ra3bjl
/* 8_d-81Dd
* (non-Javadoc) 1Q}mf!Y
* %HtuR2#ca
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +TeFt5[)h
*/ Fk^3a'/4KJ
public void sort(int[] data) { lEPAP|~uw
int[] temp=new int[data.length]; 92dF`sv
mergeSort(data,temp,0,data.length-1); 3Dm8[o$Z
} \'19BAm'
g"Qh]:
private void mergeSort(int[] data, int[] temp, int l, int r) { v_PdOp[ k
int i, j, k; lf>nbvp
int mid = (l + r) / 2; BzpP7ZWV
if (l == r) A1cb"N^
return; =QV::/
if ((mid - l) >= THRESHOLD) &[?CTZ
mergeSort(data, temp, l, mid); 0MIUI<;j
else |'HLz=5\
insertSort(data, l, mid - l + 1); AB.(CS=i
if ((r - mid) > THRESHOLD) .g\6g~n
mergeSort(data, temp, mid + 1, r); ,D80/2U^
else `PI(%N
insertSort(data, mid + 1, r - mid); XeUC0K[D
}bB`(B,m
for (i = l; i <= mid; i++) { h3u1K>R)
temp = data; Q |i9aE
} `GQ{*_-
for (j = 1; j <= r - mid; j++) { RE46k`44
temp[r - j + 1] = data[j + mid]; 6R}j-1 <n
} a0Oe:]mo\
int a = temp[l]; NB8&
int b = temp[r]; 1M%S gV-#
for (i = l, j = r, k = l; k <= r; k++) { }4%/pOi:f
if (a < b) { W^g[L:s
data[k] = temp[i++]; w,.qCpT$_
a = temp; ySdN;d:q
} else { `?s.\Dh
data[k] = temp[j--]; }GHxG9!z
b = temp[j]; US?Rr
} ~el-*=<m
} _JGs}aQ
} j kn^Z":
{^q)^<#JT
/** (!K+P[g
* @param data NVIWWX9?
* @param l c^I0y!
* @param i #]KgUc5B
*/ 8IY19>4'5J
private void insertSort(int[] data, int start, int len) { yOHXY&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0=U70nKr
} 'Am-vhpm
} rjojG59U>
} 'u[%}S38
} ;\b@)E}
L&w.j0fq
堆排序： "-i#BjZl/
yFIIX=NC
package org.rut.util.algorithm.support; /Ic[N&
EO"C8z'al
import org.rut.util.algorithm.SortUtil; p6 xPheD
v"1Po_`
/** =fG:A(v%}
* @author treeroot J=WB6zi
* @since 2006-2-2 2:v<qX
* @version 1.0 4L:>4X[T
*/ [ x>
public class HeapSort implements SortUtil.Sort{ z?.(3oLT
^)\+l%M
/* (non-Javadoc) P2k7M(I_&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CJw$j`k
*/ L`K;IV%;
public void sort(int[] data) { VQ |^
MaxHeap h=new MaxHeap(); p!"(s/=
h.init(data); 9R]](g#
for(int i=0;i h.remove(); E8[XG2ye
System.arraycopy(h.queue,1,data,0,data.length); +g\;bLT
} o'UHStk
ubGs/Vzye
private static class MaxHeap{ cx(2jk}6
Gbb\h
void init(int[] data){ INNAYQ
this.queue=new int[data.length+1]; f]_mzF=&
for(int i=0;i queue[++size]=data; w7Dt1axB
fixUp(size); G%hO\EO
} wly>H]i'
} Q-('5a19J
:1<~}*B@{
private int size=0; M9"Sgb`g
3VP$x@AV
private int[] queue; J|j;g!fK
?JqjYI{$
public int get() { E$S`6+x`:a
return queue[1]; |`]oc,1h@
} |cTpw1%I~
' iQ9hQjD
public void remove() { _X%Dw
SortUtil.swap(queue,1,size--); yq*JdTF
fixDown(1); fi=?n{e'
} 9)ea.Gu
file://fixdown <aVfJd/fT
private void fixDown(int k) { k=uZ=tUft*
int j; sv=^k(d3
while ((j = k << 1) <= size) { WN0c%kz=
if (j < size %26amp;%26amp; queue[j] j++; ;QPy:x3
if (queue[k]>queue[j]) file://不用交换 f-+.;`H)T
break; )Qr6/c8}
SortUtil.swap(queue,j,k); euZ(}+N&
k = j; ?`. XK}
} zD_HyGf
} =~,l4g\
private void fixUp(int k) { n6cq\@~A
while (k > 1) { &>=#w"skb6
int j = k >> 1; BJIQ zn3
if (queue[j]>queue[k]) JK^[{1 JI
break; tp+=0k2i
SortUtil.swap(queue,j,k); )0|):g
k = j; pTET%)3
} j`9Nwa
} BTs0o&}e
"_)|8|gN
} `vEqj v
b`]M|C [5
} *<dHqK`?C
u+DX$#-n!]
SortUtil： j |td,82.
5&(3A|P2
package org.rut.util.algorithm; \3j)>u,r
3Uo]>BG
import org.rut.util.algorithm.support.BubbleSort; ZYKd
import org.rut.util.algorithm.support.HeapSort; G+C}<S}
import org.rut.util.algorithm.support.ImprovedMergeSort; n_;S2KM
import org.rut.util.algorithm.support.ImprovedQuickSort; ,aO@.<"
import org.rut.util.algorithm.support.InsertSort; y< ud('D
import org.rut.util.algorithm.support.MergeSort; msG3~@q
import org.rut.util.algorithm.support.QuickSort; j0?>w{e
import org.rut.util.algorithm.support.SelectionSort; ?Ccw4]YO,=
import org.rut.util.algorithm.support.ShellSort; bX&e_Pd
/s8/q2:
/** MCd F!{
* @author treeroot i* gKtjx
* @since 2006-2-2 "aA_(Ydzj
* @version 1.0 <?4cWp|i
*/ -pX|U~a[
public class SortUtil { jJ-d/"(
public final static int INSERT = 1; V0T<eH<
public final static int BUBBLE = 2; oT!/J
public final static int SELECTION = 3; :p$EiR
public final static int SHELL = 4; D"`[6EN[
public final static int QUICK = 5; NxB+?
public final static int IMPROVED_QUICK = 6; vnVZJ}]w\
public final static int MERGE = 7; -fQX4'3R
public final static int IMPROVED_MERGE = 8; 4@/z
public final static int HEAP = 9; $owb3g(%4
%09*l%,;
public static void sort(int[] data) { `{L{wJ:&a
sort(data, IMPROVED_QUICK); ,5:![
} ' 3VqkQ4
private static String[] name={ PC0HH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O(Td:Zdp
}; '2xcce#
<vLdBfw&N
private static Sort[] impl=new Sort[]{ i :EO(`
new InsertSort(), c _p[yS
new BubbleSort(), ooDdV >
new SelectionSort(), A`Q >h{
new ShellSort(), }bCK
new QuickSort(), uDI}R]8~
new ImprovedQuickSort(), ex=)H%_|
new MergeSort(), QA!#s\
new ImprovedMergeSort(), ~}9Bn)@
new HeapSort() c-`37. J
}; r8F{A6iN
h-,?a_
public static String toString(int algorithm){ b_ZNI0Hp@
return name[algorithm-1]; Seg#s.
} k!9=
"Ac~2<V
public static void sort(int[] data, int algorithm) { ;9vIa7L&
impl[algorithm-1].sort(data); qkiJHT
} k_BSY=$e*D
3Mxz_~
public static interface Sort { q>P[nz%
public void sort(int[] data); S_j1=6#^
} IY03"
!6{Jq]
public static void swap(int[] data, int i, int j) { j7,13,t1-
int temp = data; '#KA+?@
data = data[j]; 7\f{'KL
data[j] = temp; gINwvzW{
} "B~WcC
} _Ws#UL+Nq