[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; cM&2SRBZ
} o3Vn<Z$/Cl
int i1=l; FkqQf8HB
int i2=mid+1; /_\#zC[
for(int cur=l;cur<=r;cur++){ #n
if(i1==mid+1) L!'k !k
data[cur]=temp[i2++]; =l9T7az
else if(i2>r) &W6^6=E{g
data[cur]=temp[i1++]; k{AyD`'Q
else if(temp[i1] data[cur]=temp[i1++]; mF09U(ci
else a{!r`>I\f
data[cur]=temp[i2++]; 3SBZ>
} o:Zd1"Z
} d vOJW".
i1oKrRv
} M0c9pE
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改进后的归并排序: UkfB^hA
+<.\5+
package org.rut.util.algorithm.support; -#29xRPk
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import org.rut.util.algorithm.SortUtil; XMRNuEU
+jqj6O@Tjr
/** @ 2_<,;$
* @author treeroot aj~bt-cE
* @since 2006-2-2 ]bgY6@M
* @version 1.0 j}+5vB|0
*/ [WB{T3j
public class ImprovedMergeSort implements SortUtil.Sort { ~JuKV&&}K
S)A'Y]2X
private static final int THRESHOLD = 10; 3|rn] yZ
(vJ2z =z
/* (shK
* (non-Javadoc) >?YNW
* {6d b{ ay_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O4No0xeWo
*/ |c2v%'J2G
public void sort(int[] data) { h7;bclU
int[] temp=new int[data.length]; ]$M<]w,IJ2
mergeSort(data,temp,0,data.length-1); cUK\x2
} bO<0qM~
}wSy
private void mergeSort(int[] data, int[] temp, int l, int r) { HhkN^S,
int i, j, k; D6Y6^eS-
int mid = (l + r) / 2; #^&jW
if (l == r) WjM>kWv
return; # 4|9Fj??
if ((mid - l) >= THRESHOLD) xq!IbVV/h
mergeSort(data, temp, l, mid); (_9|w|(
else qd!#t]
insertSort(data, l, mid - l + 1); Sd:.KRTu.
if ((r - mid) > THRESHOLD) mYNEz @
mergeSort(data, temp, mid + 1, r); (Btv ClZ
else y~F<9;$=
insertSort(data, mid + 1, r - mid); ^GYq#q9Q
TK>{qxt:=
for (i = l; i <= mid; i++) { @ERu>nSP
temp = data; )Hf~d=GG
} >WM3|
for (j = 1; j <= r - mid; j++) { .}9FEn 8
temp[r - j + 1] = data[j + mid]; `<j_[(5yb
} 1.R kIB
int a = temp[l]; X^< >6|)
int b = temp[r]; GJ}.\EaAJ
for (i = l, j = r, k = l; k <= r; k++) { w}M3x^9@
if (a < b) { ^C9x.4I$)
data[k] = temp[i++]; LxT rG)4
a = temp; [BBpQN.^q6
} else { (3md:r<-
data[k] = temp[j--]; P 4;{jG
b = temp[j]; &.*uc|{
} agaq`^[(P
} 7CrpUh
} 1.SkIu%
H/+{e,SW"
/** wq4nMY:#
* @param data '1]7zWbW
* @param l _2jw,WKr
* @param i z};ZxN
*/ kb|eQtH
private void insertSort(int[] data, int start, int len) { bZ#X9fT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'Kis hXOn]
} aed+C:N
} JJl7JwSTW
} 2q%K)h
} *=vlqpG
3$"/>g/
堆排序： y3yvZD
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package org.rut.util.algorithm.support; abZdGnc
+AK:(r
import org.rut.util.algorithm.SortUtil; /84bv=
<pOl[5v]
/** WOO%YU =
* @author treeroot +8UdvMN
* @since 2006-2-2 pN$;!
* @version 1.0 g2'x#%ET
*/ e~Hr(O+;e6
public class HeapSort implements SortUtil.Sort{ <F=Dj*]
Lp~^*j(
/* (non-Javadoc) b~W)S/wF$P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8^w/HCC8O
*/ \|Qb[{<:,
public void sort(int[] data) { Tiprdvm<
MaxHeap h=new MaxHeap(); /{DaPqRa
h.init(data); C|6{fd4?
for(int i=0;i h.remove(); ;i9>}]6
System.arraycopy(h.queue,1,data,0,data.length); >Me]m<$E;
} vOgLEN&]
j@C0af
private static class MaxHeap{ dYyW]nZ&
pruWO'b`
void init(int[] data){ {NeWdC
this.queue=new int[data.length+1]; l.7d$8'\
for(int i=0;i queue[++size]=data; IIaxgfhZ
fixUp(size); XOxB (0@
} zKJ.Tj W
} <9\,QR)
01nsdZ-
private int size=0; E0`[G]*G
MW]8;`|jC
private int[] queue; cqk]NL`'
ja75c~RUw
public int get() { _:5=|2-E
return queue[1]; 6z1\a
} DVzssPg
`Z8^+AMc
public void remove() { 0IFlEe[>#
SortUtil.swap(queue,1,size--); fN0bIE Y
fixDown(1); Vr\Q`H.
} .\)k+ R
file://fixdown qsvpW%?aE
private void fixDown(int k) { eKJ:?Lxv;
int j; M,JA;a, _
while ((j = k << 1) <= size) { &gWiu9WbS
if (j < size %26amp;%26amp; queue[j] j++; <N5rv3 s
if (queue[k]>queue[j]) file://不用交换 hBoP=X.~
break; 1$OVe4H1
SortUtil.swap(queue,j,k); 1C'P)f28
k = j; Wo2v5-
} WQ.i$ID/
} `A"Q3sf%
private void fixUp(int k) { A:c]1
while (k > 1) { ixzTJ]yu
int j = k >> 1; ;ct)H* y
if (queue[j]>queue[k]) -? Tz.y&
break; 3]_qj*V
SortUtil.swap(queue,j,k); 'f6PjI
k = j; /B=l,:TnJ
} `#=fA
} v D&Kae<
lJ'trYaq7
} Ym:{Mm=ud
7g-$oO
} lDlj+fK
NGSS:
SortUtil： PnJ*Zea
3!bK d2"
package org.rut.util.algorithm; 94+/wzWvi
W'V@
import org.rut.util.algorithm.support.BubbleSort; >"bnpYSe
import org.rut.util.algorithm.support.HeapSort; -+' #*V
import org.rut.util.algorithm.support.ImprovedMergeSort; } m6\C5
import org.rut.util.algorithm.support.ImprovedQuickSort; 5=m3J!?
import org.rut.util.algorithm.support.InsertSort; T aEt
import org.rut.util.algorithm.support.MergeSort; k}-]W@UCa?
import org.rut.util.algorithm.support.QuickSort; ]xI?,('_m
import org.rut.util.algorithm.support.SelectionSort; PC[cHgSYU
import org.rut.util.algorithm.support.ShellSort; gjQ=8&i
vi<X3G6Xh
/** }/49T
* @author treeroot ?n&$m
* @since 2006-2-2 _l<|1nH
* @version 1.0 QS5H>5M)
*/ 1GUqT 9)
public class SortUtil { ;fj9n-
public final static int INSERT = 1; joY1(Y
public final static int BUBBLE = 2; 7:h<`_HT(X
public final static int SELECTION = 3; #TIX_RXh
public final static int SHELL = 4; 2k+=kt
public final static int QUICK = 5; fMyE&#}z
public final static int IMPROVED_QUICK = 6; .E#<fz
public final static int MERGE = 7; ;hkro$
public final static int IMPROVED_MERGE = 8; zdqnL^wb
public final static int HEAP = 9; {f&NStiB
0Ux<16#
public static void sort(int[] data) { 4uX,uEa
sort(data, IMPROVED_QUICK); 6mi$.' qP
} rv`2*B
private static String[] name={ z^gi[ mi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yS+(<
}; ^g-Fg>&M
C(xqvK~p
private static Sort[] impl=new Sort[]{ U%h7h`=F?
new InsertSort(), 70duk:Ri0
new BubbleSort(), qPqy4V.;
new SelectionSort(), aN:HG)$@
new ShellSort(), 9e-*JYF]C
new QuickSort(), u>81dO]H
new ImprovedQuickSort(), xJN|w\&
new MergeSort(), >kt~vJI
new ImprovedMergeSort(), {ip=iiW2
new HeapSort() )-)ss"\+Ju
}; Fgskb"k/
g&q]@m
public static String toString(int algorithm){ k?o^5@b/
return name[algorithm-1]; |OOXh[y
} Td5bDO
ss/h[4h4h
public static void sort(int[] data, int algorithm) { DgC3> yL
impl[algorithm-1].sort(data); 3Ca \`m)l
} c]e`m6
vlAO z
public static interface Sort { 4}+xeGA$
public void sort(int[] data); \>4v?\8o
} Akv(} !g
lj4%(rB=
public static void swap(int[] data, int i, int j) { B%TXw#|
int temp = data; P8"6"}B;T
data = data[j]; qbEKp HnB
data[j] = temp; /3OC7!~;fM
} 7WgIhQ~
} t'dHCp}