[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; $>Md]/I8
} v0uDL7
int i1=l; 7^1yZ1(
int i2=mid+1; lh^-L+G:Ok
for(int cur=l;cur<=r;cur++){ (ndXz
if(i1==mid+1) OBrbWXp@
data[cur]=temp[i2++]; `! ~~Wf'
else if(i2>r) PNy)TqdRS
data[cur]=temp[i1++]; Itq248+Ci
else if(temp[i1] data[cur]=temp[i1++]; `;KU^dH
else $Ro]]NUz|
data[cur]=temp[i2++]; H'2&3v
} qyi5j0)W
} .quui\I3
<X@XbM
} D1w;cV7/d
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改进后的归并排序: E|R^tETb
bm/pLC6%.
package org.rut.util.algorithm.support; 2I:x)
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import org.rut.util.algorithm.SortUtil; 7oUecyoj
4}0DEH.Vx
/** z}Y23W&sX
* @author treeroot 9Q\CJ9
* @since 2006-2-2 Vyy;mEBg
* @version 1.0 \tv^],^`
*/ [/Q .MmnL
public class ImprovedMergeSort implements SortUtil.Sort { RWyDX_z#<
</xz V<Pi
private static final int THRESHOLD = 10; h?t#ABsVK
%63zQFk
/* 0}LBnV
* (non-Javadoc) +Cs[]~
* 0%x"Va~"z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kjw==5)}
*/ ?+3vK=Rf}
public void sort(int[] data) { ,=TY:U;?
int[] temp=new int[data.length]; FYOQ}N
mergeSort(data,temp,0,data.length-1); x}^:Bs+j
} K)ZW1d;
,)&ansN
private void mergeSort(int[] data, int[] temp, int l, int r) { ;)nkY6-
int i, j, k; qS8p)pw
int mid = (l + r) / 2; c<k=8P
if (l == r) Uz4!O
return; CBkI! In2
if ((mid - l) >= THRESHOLD) y nue;*rM
mergeSort(data, temp, l, mid); 8-JOfq}s
else g4eEkG`XTS
insertSort(data, l, mid - l + 1); ]VKM3[
if ((r - mid) > THRESHOLD) 7lLh4__;`6
mergeSort(data, temp, mid + 1, r); :.VI*X:aQh
else D,3Kx ^
insertSort(data, mid + 1, r - mid); f6of8BOg
3p+V~n.+
for (i = l; i <= mid; i++) { @p$Nw.{'
temp = data; s'7PHP)LOJ
} mM[KT} A
for (j = 1; j <= r - mid; j++) { Vx Vpl@
temp[r - j + 1] = data[j + mid]; mRurGaR
} Hto RN^9
int a = temp[l]; KD<smwXjG
int b = temp[r]; qsT@aSIo9
for (i = l, j = r, k = l; k <= r; k++) { h]+UK14m
if (a < b) { 0I v(ioB=
data[k] = temp[i++]; 2@Nt6r
a = temp; }O+a
} else { mhNX05D
data[k] = temp[j--]; ShIJ6LZ
b = temp[j]; x]Pp|rHj
} Nc da~h Q
} v 1.8]||^
} {}n]\zO %
>iV2>o_
/** GXnrVI
* @param data IDY2X+C#U
* @param l {i^F4A@=Z
* @param i u\AL`'v
*/ u]z87#4
private void insertSort(int[] data, int start, int len) { 5r` x\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v[2N-
} ~Fe$/*v
} n~Yr`5+Z
} u~~H'*EM
} KU=+ 1,Jf
B'v~0Kau
堆排序： Y6E0-bL@Fe
] :SbvsPm
package org.rut.util.algorithm.support; W9G1wU
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import org.rut.util.algorithm.SortUtil; #z5$_z?_
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/** VvUP;o&/
* @author treeroot Gspb\HJ^
* @since 2006-2-2 [9;[g~;E%m
* @version 1.0 0O!A8FA0
*/ |Kq<}R
public class HeapSort implements SortUtil.Sort{ 3De(:c)@
bs_< UE
/* (non-Javadoc) O9P4r*prA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vhGX&
*/ C({r1l4[D
public void sort(int[] data) { _)Ad%LPsd7
MaxHeap h=new MaxHeap(); )E*-
h.init(data); m^o?{ (K
for(int i=0;i h.remove(); 1l s8h
System.arraycopy(h.queue,1,data,0,data.length); NpH:5hi
} GQ0(lS
)tx2lyY:
private static class MaxHeap{ .1f!w!ltVR
i.0d>G><@
void init(int[] data){ s[;1?+EI
this.queue=new int[data.length+1]; {^Rr:+
for(int i=0;i queue[++size]=data; IqFmJs|C
fixUp(size); `4,]Mr1b
} o0_H(j?
} u/apnAW@M
zHD8\*
private int size=0; sitgz)Ki^
-FS!v^
private int[] queue; eB9F35[
Z~K} @
public int get() { -Dwe,N"{2
return queue[1]; I2gSgv%
} ;;N#'.xD
wlDo(]mj=O
public void remove() { F$S/zh$)0
SortUtil.swap(queue,1,size--); XEUS)X)
fixDown(1); g,B@*2Uj
} DAy|'%rF1-
file://fixdown ,xutI
private void fixDown(int k) { 8l<~zIoO
int j; tm.&k6%
while ((j = k << 1) <= size) { 1 J[z ![Tf
if (j < size %26amp;%26amp; queue[j] j++; X=? \A{Y
if (queue[k]>queue[j]) file://不用交换 jGYl*EBx
break; w+{{4<+cd
SortUtil.swap(queue,j,k); .uB[zJc
k = j; Lr Kx
} orFB*{/Z
} ~ujg250.L
private void fixUp(int k) { Mo]iVj8~
while (k > 1) { }OSfC~5P
int j = k >> 1; u4xJ-Vu
if (queue[j]>queue[k]) uN0'n}c;1.
break; @h5Q?I
SortUtil.swap(queue,j,k); r<;Y4<,BZ
k = j; 3*R(&O6}
} ;1k_J~Qei
} &<) _7?
V/ZWyYxjLi
} DvTbt?i[
R(2MI}T
} [n +(
nb@<UbabW}
SortUtil： 0.#%KfQ
s%?<:9
package org.rut.util.algorithm; &WdP=E"
0qBXL;sE
import org.rut.util.algorithm.support.BubbleSort; eXdH)|l,\
import org.rut.util.algorithm.support.HeapSort; pe+m%;nzR
import org.rut.util.algorithm.support.ImprovedMergeSort; '=IuwCB|;
import org.rut.util.algorithm.support.ImprovedQuickSort; d%Ku'Jy
import org.rut.util.algorithm.support.InsertSort; eoPoGC
import org.rut.util.algorithm.support.MergeSort; _K~?{".
import org.rut.util.algorithm.support.QuickSort; 7RgnL<t~:8
import org.rut.util.algorithm.support.SelectionSort; K$M,d- `b
import org.rut.util.algorithm.support.ShellSort; ,-> P+m5
* =O@D2g0
/** 'eoI~*}3WQ
* @author treeroot #elaz8 5
* @since 2006-2-2 ]j(Ld\:L
* @version 1.0 [oH,FSuO!2
*/ CjA}-ee
public class SortUtil { \g|;7&%l3
public final static int INSERT = 1; UKSI"/8I
public final static int BUBBLE = 2; wJF$<f7P
public final static int SELECTION = 3; OL[_2m*;9p
public final static int SHELL = 4; hpticW|
public final static int QUICK = 5; y] ~X{v
public final static int IMPROVED_QUICK = 6; Pq( )2B
public final static int MERGE = 7; X .S8vlb4z
public final static int IMPROVED_MERGE = 8; CY9`HQ1
public final static int HEAP = 9; t{/ EN)J
wT\dzp>/
public static void sort(int[] data) { ?/s=E+
sort(data, IMPROVED_QUICK); 5{6ebq55"
} Ia)^
private static String[] name={ NPR{g!tK%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^F1zkIE
}; ZZ6F0FLXJ
0 .p $q
private static Sort[] impl=new Sort[]{ Th*mm3D6
new InsertSort(), m;I;{+"u
new BubbleSort(), KBGJB`D*
new SelectionSort(), iF]vIg#h
new ShellSort(), *'(dcy9
new QuickSort(), h-h}NCP
new ImprovedQuickSort(), v]27+/a$c
new MergeSort(), s/'gl
new ImprovedMergeSort(), Ljxn}):[
new HeapSort() ]j:Ikb}
}; c5rQkDW
@.iOFY
public static String toString(int algorithm){ _V|'iz9.
return name[algorithm-1]; ^q$vyY
} g^En6n)
(jYs_8;
public static void sort(int[] data, int algorithm) { Dl/_jM
impl[algorithm-1].sort(data); BmUzsfD
} 3B"rI
$Y0bjS2J
public static interface Sort { <FK7Rz:4T
public void sort(int[] data); U>x2'B v
} [%nG_np
ddHIP`wb
public static void swap(int[] data, int i, int j) { AQ 7e
int temp = data; @4B2O"z`
data = data[j]; v981nJ>w,
data[j] = temp; L}a3!33)C
} M7Hk54U+t
} $'FPst8Q<