[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; {WeXURp&nF
} @[lc0_b
int i1=l; 7O{O')o!
int i2=mid+1; AWXpA1(
for(int cur=l;cur<=r;cur++){ ?lN8~Ze
if(i1==mid+1) M2Fj)w2
data[cur]=temp[i2++]; M.N~fSJ
else if(i2>r) fR%1FXpK&
data[cur]=temp[i1++]; hUvuq,LH_
else if(temp[i1] data[cur]=temp[i1++]; yUmsE-W
else /NX7Vev
data[cur]=temp[i2++]; Ca@=s
} QsJW"4d
} 0&IXzEOr
RrdtU7i3
} L"!ZY
~!:Sp_y
改进后的归并排序: JOx,19r
k+#l;<\2
package org.rut.util.algorithm.support; 5vX8mPR_
_s^:zPl
import org.rut.util.algorithm.SortUtil; 3u0<v%Qi
F0'A/T'ht
/** 0O,T=z[+>
* @author treeroot _OU.JrqC
* @since 2006-2-2 ;i9<y8Dha
* @version 1.0 W({TC
*/ j-`X_8W
public class ImprovedMergeSort implements SortUtil.Sort { ~J>gVg%66
wYO"znd
private static final int THRESHOLD = 10; b}Hl$V(uD
}i7U}T
/* Gk"L%Zt)
* (non-Javadoc) v<3o[mq
* UcLNMn|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VMZ]n%XRXW
*/ ]ZKt1@4AY
public void sort(int[] data) { zP(=,)d
int[] temp=new int[data.length]; g2{H^YUN$_
mergeSort(data,temp,0,data.length-1); SU%rWH
} (21 W6
ezr\T
private void mergeSort(int[] data, int[] temp, int l, int r) { 5u|=;Hz*)
int i, j, k; 8\)U|/A7
int mid = (l + r) / 2; iQ|,&K0d]
if (l == r) Zp(=[n5
return; yI.}3y{^5
if ((mid - l) >= THRESHOLD) nJ*mEB
mergeSort(data, temp, l, mid); 2'<=H76
else H/Ec^Lc+_
insertSort(data, l, mid - l + 1); Awa|rIM
if ((r - mid) > THRESHOLD) |v$%V#Bo
mergeSort(data, temp, mid + 1, r); \YlF>{LVe
else -M:hlwha
insertSort(data, mid + 1, r - mid); q]N?@l]
}>;ht5/i/
for (i = l; i <= mid; i++) { ewAH'H]o
temp = data; ~S^X"8(U
} HLSfoQ&)v
for (j = 1; j <= r - mid; j++) { juCG?}di;
temp[r - j + 1] = data[j + mid]; XnE %$NJ
} 9jMC|oE
int a = temp[l]; H\=LE
int b = temp[r]; LGo2^Xx
for (i = l, j = r, k = l; k <= r; k++) { cNuHXaWp
if (a < b) { k~1j/VHv
data[k] = temp[i++]; oT|P1t.
a = temp; j(%gMVu
} else { 'z-;*!A}j
data[k] = temp[j--]; lP@)
b = temp[j]; (~ ]g,*+
} 5"kx}f2$
} S~k 0@
} nrTv=*tDj
9P7xoXJ@y
/** "B9[cDM&
* @param data &N"'7bK6n
* @param l jB%"AvIX
* @param i 0Oc}rRH(C
*/ >lraYMc<rZ
private void insertSort(int[] data, int start, int len) { `y^zM/Ib
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _oJ2]f6KX
} Dh&:-
} 5@ bc(H
} c{mKra
} >P\h,1
A,m4WO_q3
堆排序： DHm[8 Qp
YgfSC}a
package org.rut.util.algorithm.support; ~*7O(8
Jt2,LL:G
import org.rut.util.algorithm.SortUtil; W&+y(Z-t
b|sc'eP#?
/** O->_/_
* @author treeroot (ve+,H6w\
* @since 2006-2-2 ]~ !XiCqu
* @version 1.0 *?_qE
*/ `E} p77
public class HeapSort implements SortUtil.Sort{ *.m{jgi1X
;.ysCF
/* (non-Javadoc) 6kt]`H`cfJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \}$*}gW[}
*/ RDs,sj/Y9?
public void sort(int[] data) { Y&vHOA
MaxHeap h=new MaxHeap(); jDlA<1
h.init(data); T[0V%Br{d+
for(int i=0;i h.remove(); kqVg2#<@M
System.arraycopy(h.queue,1,data,0,data.length); 8^/+wa+G
} cT-K@dg
3yTQ
private static class MaxHeap{ @72x`&|I?u
@J-plJ4e
void init(int[] data){ ug^om{e-
this.queue=new int[data.length+1]; `OKo=e~,
for(int i=0;i queue[++size]=data; CN.6E<9'kK
fixUp(size); e7@li<3>d
} %{R_^Y8t
} |x &Z~y
3<c*v/L{C\
private int size=0; [AXsnpa/C
|EF>Y9
private int[] queue; b/}'Vf[
a(8>n Z,V
public int get() { )K{o<m~WAo
return queue[1]; ;#3ekl{-g
} \s=QiPK
}*iAE>;
public void remove() { 89zuL18V
SortUtil.swap(queue,1,size--); OuB2 x=B
fixDown(1); QF\kPk(CtD
} g-."sniP$g
file://fixdown p1Q/g Il
private void fixDown(int k) { MWM +hk1fs
int j; |]^l^e6m
while ((j = k << 1) <= size) { R=`U4Ml;
if (j < size %26amp;%26amp; queue[j] j++; \).Nag+
if (queue[k]>queue[j]) file://不用交换 QT#b>xV)1
break; y0,Ft/D
SortUtil.swap(queue,j,k); x.I][(}
k = j; kr^0% A
} G9\EZ\x!
} '.pgXsC:=?
private void fixUp(int k) { __8&Jv\
while (k > 1) { KzV.+f
int j = k >> 1; FyCBNtCv
if (queue[j]>queue[k]) e\`wlaP,
break; z~F37]W3[
SortUtil.swap(queue,j,k); {3_Gjb5\\4
k = j; }A-{6Qe
} mv{<'
} s~L`53A
$( S*GF$S
} .+OB!'dDK^
eaEbH2J
} W+KF2(lB
Zw+=ng.q?
SortUtil： 8pqs?L@W
Gc wt7~
package org.rut.util.algorithm; FtE90=$
ri:,q/-
import org.rut.util.algorithm.support.BubbleSort; '}_=kp'X
import org.rut.util.algorithm.support.HeapSort; )&>L !,z
import org.rut.util.algorithm.support.ImprovedMergeSort; q$F)!&
import org.rut.util.algorithm.support.ImprovedQuickSort; (}G!np
import org.rut.util.algorithm.support.InsertSort; 6VC-KY
import org.rut.util.algorithm.support.MergeSort; 4iwf\#
import org.rut.util.algorithm.support.QuickSort; v{r1E]rY
import org.rut.util.algorithm.support.SelectionSort; iecWa:('
import org.rut.util.algorithm.support.ShellSort; /^Y[*5
GjEqU;XBi
/** 012Lwd
* @author treeroot 6;gLwOeOHY
* @since 2006-2-2 1t.R+1[c
* @version 1.0 sa G8g
*/ }"hW b(
public class SortUtil { hqL+_|DW
public final static int INSERT = 1; 8yn4}`Nc@
public final static int BUBBLE = 2; 0 <g{ V
public final static int SELECTION = 3; )Bo]=ZTJ^
public final static int SHELL = 4; *,17x`1e
public final static int QUICK = 5; NddO*`8+)
public final static int IMPROVED_QUICK = 6; e^zHw^js
public final static int MERGE = 7; opXDm\
public final static int IMPROVED_MERGE = 8; "e@n:N!
public final static int HEAP = 9; 7{4w2)
YGETMIT(
public static void sort(int[] data) { H37QgApB
sort(data, IMPROVED_QUICK); 9:Si] Pp+S
} 19p8B&
private static String[] name={ uxb:^d?D!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :5jexz."M
}; BX*69
zd.'*Dj
private static Sort[] impl=new Sort[]{ L/yaVU{aEb
new InsertSort(), :> SLQ[1
new BubbleSort(), \9w~pO
new SelectionSort(), E~qQai=]
new ShellSort(), 4^[ /=J}
new QuickSort(), +pz}4M`
new ImprovedQuickSort(), gX^ PSsp
new MergeSort(), myIe_k,F
new ImprovedMergeSort(), W&YU^&`Yr
new HeapSort() _lX8K:C(
}; ALXTR%f
TdFT];:
public static String toString(int algorithm){ b1xpz1
return name[algorithm-1]; &))\2pl
} 0elxA8Z~e
wx*1*KZ
public static void sort(int[] data, int algorithm) { <!F3s`7~
impl[algorithm-1].sort(data); JaI Kjn
} aBxiK[[`
]ENK8bW
public static interface Sort { {~_Y _-
public void sort(int[] data); Bd&`Xfebj
} VO_dA4C}z
FqZgdmwR
public static void swap(int[] data, int i, int j) { M?$ZJ-
int temp = data; oxzq!U
data = data[j]; /P:EWUf'
data[j] = temp; 2)9r'ai?a
} o/^1Wm=
} :^#vxdIC?