[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; EZvB#cuL-
} X]'Hz@$N
int i1=l; <pd6,l\
int i2=mid+1; 1FfdW>ay*
for(int cur=l;cur<=r;cur++){ $V"NB`T
if(i1==mid+1) qX'w}nJ}H}
data[cur]=temp[i2++]; TmS;ybsG
else if(i2>r) aQax85
data[cur]=temp[i1++]; _Q<wb8+/
else if(temp[i1] data[cur]=temp[i1++]; x<)%Gs}tb
else S312h'K j
data[cur]=temp[i2++]; :SxOQ(n
} a/@<KnT
} Sz0M8fYT]
e2#"o{+@
} wv,,#P
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改进后的归并排序: JL~QE-pvD
T-7'#uB.m
package org.rut.util.algorithm.support; 3Rid1;L0U
OHnHSb'?\
import org.rut.util.algorithm.SortUtil; AYHfe#!
sPNX)
/** DbSl}N;
* @author treeroot 4-q7o]%5<
* @since 2006-2-2 Uo{h. .7?
* @version 1.0 V43pZ]YZ>
*/ # k+Ggw
public class ImprovedMergeSort implements SortUtil.Sort { VQHJO I
9GnNL I{
private static final int THRESHOLD = 10; riI0k{
Z<a6U 3
/* NLDmZra
* (non-Javadoc) =J.)xDx*
* oRM EC7!A0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qB3{65
*/ fFXG;Q8&
public void sort(int[] data) { G'XlsyaWrb
int[] temp=new int[data.length]; bw#zMU^E
mergeSort(data,temp,0,data.length-1); 4QWDuLu
} Kb0OauW
<i'4EnO
private void mergeSort(int[] data, int[] temp, int l, int r) { bAeN>~WvY
int i, j, k; SsjO1F
int mid = (l + r) / 2; qE6:`f
if (l == r) ie$QKoE
return; 8?']W\)
if ((mid - l) >= THRESHOLD) kr7f<;rmJ
mergeSort(data, temp, l, mid); = PldXw0
else AqVTHyCu
insertSort(data, l, mid - l + 1); [|UW_Bz
if ((r - mid) > THRESHOLD) iV#JJ-OBq
mergeSort(data, temp, mid + 1, r); sm}q&m]ad
else {+f@7^/i.
insertSort(data, mid + 1, r - mid); uF>I0J#z?
=SLP}bP{:
for (i = l; i <= mid; i++) { /LhAQpUQT5
temp = data; /_rAy
} dQ^>,(
for (j = 1; j <= r - mid; j++) { Uq)|]a&e
temp[r - j + 1] = data[j + mid]; 3+m#v8h1
} q`09
int a = temp[l]; )8oI s
int b = temp[r]; ".| 9h
for (i = l, j = r, k = l; k <= r; k++) { >]"5K<-1
if (a < b) { ~Dr/+h:^\
data[k] = temp[i++]; gcr,?rE<
a = temp; zQxZR}'
} else { AO;`k]0e
data[k] = temp[j--]; ZZTPAmIr
b = temp[j]; _,b%t1v
} T3['6%
} 3y>.1
} u*[,W-R&
KtHh--j`
/** D_O%[u}
* @param data D0PP
* @param l ?)Lktn9%
* @param i TJ`E/=J!
*/ hC}A%_S
private void insertSort(int[] data, int start, int len) { WX 79V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /-4i"|
} Z5Ao3O@
} ;^:~xJFx|
} N`y!Km
} \~xsBPX+x
p<'mc|hGq
堆排序： g=pz&cz;>\
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package org.rut.util.algorithm.support; 8x'rNb
df#DKV:
import org.rut.util.algorithm.SortUtil; pw:<a2.
yyk[oH-Q
/** (|ga#%iI
* @author treeroot ^`YSl*:
* @since 2006-2-2 r0QjCFSF=
* @version 1.0 FqsG#6|x
*/ 3z: rUhA
public class HeapSort implements SortUtil.Sort{ X=(8t2
EBw}/y{Kt
/* (non-Javadoc) )aquf<u@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u4$d#0sA
*/ dT,X8 "
public void sort(int[] data) { i[d-n/)
MaxHeap h=new MaxHeap(); KBzEEvx/$
h.init(data); 6luCi$bL
for(int i=0;i h.remove(); {exF"ap
System.arraycopy(h.queue,1,data,0,data.length); ^]wm Y
} -N5r[*>
S=[K/Kf-
private static class MaxHeap{ QfU 0*W?r
GfQMdLy\Z
void init(int[] data){ 5#d"]7
this.queue=new int[data.length+1]; ~n]:f7?I
for(int i=0;i queue[++size]=data; t>&$_CSWK
fixUp(size); ceVej'
} ;^}cZ
} lZ^XZjwoM
2K, 1wqf'
private int size=0; [$.oyjd
H|F>BjXn5
private int[] queue; jY>KF'y
8<)[+@$0
public int get() { k4pvp5}%
return queue[1]; H) q9.Jg
} ZH_ J+
]lQhIf6)k
public void remove() { '4HwS$mW3
SortUtil.swap(queue,1,size--); E3,Z(dpX!
fixDown(1); w \0=L=J
} 9]|[z{v'>l
file://fixdown HtY\!_Ea
private void fixDown(int k) { XFYCPET
int j; k6[t$|lMy
while ((j = k << 1) <= size) { j@UW[,UI
if (j < size %26amp;%26amp; queue[j] j++; t]eB3)FX
if (queue[k]>queue[j]) file://不用交换 1ErH \!
break; bL *;N3#E
SortUtil.swap(queue,j,k); k>VP<Zm13
k = j; ),bdj+wr78
} ^fnRzX
} n{Jvx>);
private void fixUp(int k) { X/5tZ@
while (k > 1) { ,X$S4>
int j = k >> 1; yKZ~ ^
if (queue[j]>queue[k]) X,O&X
break; R(pvUm&L
SortUtil.swap(queue,j,k); |[!xLqG
k = j; 'r1&zw(
} |V!A!tB
} ,dBtj8=
s.zH.q,
} F\-qXSA
^N Et{]x
} ]o,)#/' $
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SortUtil： '-w G
J5J3%6I
package org.rut.util.algorithm; B+zq!+ HJ
* +A!12s@
import org.rut.util.algorithm.support.BubbleSort; &??(EA3
import org.rut.util.algorithm.support.HeapSort; 5Odi\SJ&
import org.rut.util.algorithm.support.ImprovedMergeSort; oH6(Lq'q
import org.rut.util.algorithm.support.ImprovedQuickSort; n6Q 3X
import org.rut.util.algorithm.support.InsertSort; cY\-e?`=4
import org.rut.util.algorithm.support.MergeSort; [`ttNW(_
import org.rut.util.algorithm.support.QuickSort; ,Hys9I
import org.rut.util.algorithm.support.SelectionSort; Qg9{<0{u
import org.rut.util.algorithm.support.ShellSort; ~Gwn||g78
gvA&F|4
/** Htsa<tF
* @author treeroot (CZRX9TT1
* @since 2006-2-2 lzS"NHs<g(
* @version 1.0 kf"cd1
*/ 'ARQ7 Q[`
public class SortUtil { r)X?H
public final static int INSERT = 1; %5F=!(w
public final static int BUBBLE = 2; *WX6C("M
public final static int SELECTION = 3; +#&2*nY
public final static int SHELL = 4; )}WG`
public final static int QUICK = 5; K3 ]hUe#
public final static int IMPROVED_QUICK = 6; ,8$;|#d
public final static int MERGE = 7; m} Yf6:cr
public final static int IMPROVED_MERGE = 8; u{6*}6@fi
public final static int HEAP = 9; OY"{XnPZ
/jj}.X7yH
public static void sort(int[] data) { 9QY)<K~a
sort(data, IMPROVED_QUICK); 4,$x~m`N
} C?hw$^w7T
private static String[] name={ Q~-gtEv+&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7;|6g8=
}; #XJYkaL
!xe<@$
private static Sort[] impl=new Sort[]{ C=PBF\RkKu
new InsertSort(), ;2dhue
new BubbleSort(), IUu[`\b=
new SelectionSort(), d54>nycU~N
new ShellSort(), deeOtco$LT
new QuickSort(), GVEjB;
new ImprovedQuickSort(), I[[rVts
new MergeSort(), "me Jn/
new ImprovedMergeSort(), GueqpEd2
new HeapSort() I"@5=m5
}; fWKv3S1dT
[eWB vAiW
public static String toString(int algorithm){ uv_*E`pN~
return name[algorithm-1]; ~f%gW
} ^lf;Lc
cHJ &a`;
public static void sort(int[] data, int algorithm) { M5%u>$2
impl[algorithm-1].sort(data); M6 0(yTm
} :_Ng`b/
7sLs+|<"
public static interface Sort { !*pK#
public void sort(int[] data); o"UqI
} PkG+`N
S4?ssI
public static void swap(int[] data, int i, int j) { +(|T\%$DT
int temp = data; '{OZ[$E
data = data[j]; {mkYW-4Se
data[j] = temp; kTC6fNj[
} dAAE2}e
} W"wP%