[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; ]nM 2J}7
} Wt,t5
int i1=l; #AN]mH
int i2=mid+1; B}&9+2M
for(int cur=l;cur<=r;cur++){ NO%x 2dx0
if(i1==mid+1) ?}tWI7KI
data[cur]=temp[i2++]; L (#DVF
else if(i2>r) z^etH/]Sy
data[cur]=temp[i1++]; h,(f3Ik0O
else if(temp[i1] data[cur]=temp[i1++]; ^s;xLGl]
else *2(W`m
data[cur]=temp[i2++]; ,2R7AHk
} *\M$pUS{
} Ul`~d !3zH
Q~y) V
} K4[XP]\jr
>B~vE2^tQ~
改进后的归并排序: ?: XY3!{
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package org.rut.util.algorithm.support; @7fx0I'n
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import org.rut.util.algorithm.SortUtil; W7 .Y`u[
&{5v[:$
/** N"M?kk,
* @author treeroot 4L`<xX;:{
* @since 2006-2-2 v[*&@aW0n
* @version 1.0 MB:VACCr
*/ M#?^uu'
public class ImprovedMergeSort implements SortUtil.Sort { p3L0'rY|+
;G=:>m~
private static final int THRESHOLD = 10; ^G*zFqa+`
9td[^EB#(h
/* \GFFPCi4D
* (non-Javadoc) GcpAj9
* 5J1q]^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !idQ-&
*/ (3[Lz+W.u
public void sort(int[] data) { Z{".(?+}1
int[] temp=new int[data.length]; ?L'4*S]
mergeSort(data,temp,0,data.length-1); V|njgcn d
} dm+}nQI\
l[cBDNlrC;
private void mergeSort(int[] data, int[] temp, int l, int r) { KBO{g:"
int i, j, k; ,m08t9F
int mid = (l + r) / 2; ee7{5
if (l == r) B/n/bi8T
return; RhPEda2
if ((mid - l) >= THRESHOLD) :9=J=G*
mergeSort(data, temp, l, mid); Q 6)5*o8n
else L( B(x>w
insertSort(data, l, mid - l + 1); 33*NgQ;&~'
if ((r - mid) > THRESHOLD) $h()%C7s
mergeSort(data, temp, mid + 1, r); p^(gXzW
else Z`9yGaTO
insertSort(data, mid + 1, r - mid); l|Z<pD
y=H\Z/=
for (i = l; i <= mid; i++) { B\ITXmd
temp = data; `Qrrnq
} VZRM=;V
for (j = 1; j <= r - mid; j++) { O6Gg?j
temp[r - j + 1] = data[j + mid]; mH/$_x)o
} `~.0PnHf
int a = temp[l]; @|1/yQgi
int b = temp[r]; * I{)8
for (i = l, j = r, k = l; k <= r; k++) { :/1/i&a
if (a < b) { mK);NvJ!
data[k] = temp[i++]; JBCJVWUt
a = temp; {;kH&Pp
} else { :AzP3~BI
data[k] = temp[j--]; -$8M#n,
b = temp[j]; +~H mPQ
} ' >F_y t9
} 82q_"y>6
} F[65)"^
FV1!IE-}-
/** [HV9KAoA
* @param data 1q&gTvIp
* @param l ] SErM#$*
* @param i =)p/p6
*/ a33SY6.
private void insertSort(int[] data, int start, int len) { !FhiTh:GCh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u{/!BCKE
} qUMM}ls
} bO:m^*
} o YZmz
} HVz,liq
bN',-[E
堆排序： n5yPUJK2L6
!N::1c@C
package org.rut.util.algorithm.support; 3XeCaq'N
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import org.rut.util.algorithm.SortUtil; [8sL);pJO
X`QfOs#\
/** B3Yj
* @author treeroot NUclF|G
* @since 2006-2-2 Ju~8C\Dd
* @version 1.0 BwN>;g_
*/ gkN|3^
public class HeapSort implements SortUtil.Sort{ 9kkYD
GsG9;6c+u
/* (non-Javadoc) R^i8AbFW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NVFgRJ&
*/ <XfCQq/
public void sort(int[] data) { 4*<27
MaxHeap h=new MaxHeap(); A^a9,T
h.init(data); 1Xv- e8M
for(int i=0;i h.remove(); xP1`FSO8=
System.arraycopy(h.queue,1,data,0,data.length); #&hu-gMV
} ;zbF~5e
9bDxml1
private static class MaxHeap{ 'yWv @)
Q>FuNdUk
void init(int[] data){ L'>t:^QTh
this.queue=new int[data.length+1]; p4|Zz:f
for(int i=0;i queue[++size]=data; '$cU\DTN6
fixUp(size); m;v/(d>
} Ff\U]g
} 3j2% '$>E^
jx=2^A/i2-
private int size=0; ^H,oI*
9J$z/j;X
private int[] queue; fYU-pdWPT
O*<,lq 0K
public int get() { bB^SD] }C
return queue[1]; E+65
} JQ*CF(9
fRTQ5V
public void remove() { sf|[oD
SortUtil.swap(queue,1,size--); TV>UD q
fixDown(1); 8^H <dR
} *(~=L%s
file://fixdown uQ;b'6Jcp
private void fixDown(int k) { <3!jra,h
int j; )32BM+f"77
while ((j = k << 1) <= size) { %rz.>4i)(
if (j < size %26amp;%26amp; queue[j] j++; hb>,\46}
if (queue[k]>queue[j]) file://不用交换 d.7pc P
break; |<@X* #X5
SortUtil.swap(queue,j,k); ZW}0{8Dk
k = j; sQT0y(FW
} T1@]:`&
} YdgaZJs
private void fixUp(int k) { LWb5C{
while (k > 1) { T/^ /U6JB
int j = k >> 1; #_tixg
if (queue[j]>queue[k]) 2<aBUGA
break; pvJsSX
SortUtil.swap(queue,j,k); nKFua l3
k = j; B=:7N;BT
} cD6$C31Y]
} @x>J-Owd]J
a9ab>2G?FR
} cTKj1)!z?X
:VPZGzK4
} <B;l).[6
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SortUtil： -Kj^ l3w
[Ng#/QXk{
package org.rut.util.algorithm; ^G,]("di`
Y9TaU]7]
import org.rut.util.algorithm.support.BubbleSort; [T;0vv8
import org.rut.util.algorithm.support.HeapSort; O)'Bx=S4Ke
import org.rut.util.algorithm.support.ImprovedMergeSort; pI>i1f=W
import org.rut.util.algorithm.support.ImprovedQuickSort; mCFScT
import org.rut.util.algorithm.support.InsertSort; zY<=r.m4
import org.rut.util.algorithm.support.MergeSort; -Fodqq@,
import org.rut.util.algorithm.support.QuickSort; )g9&fGYf
import org.rut.util.algorithm.support.SelectionSort; R4<}kA,.
import org.rut.util.algorithm.support.ShellSort; Tn+6:<OFdO
9L}=xX`>?
/** i#t)tM"
* @author treeroot -E4e8'P;5
* @since 2006-2-2 6xs_@Vk|d
* @version 1.0 /-wAy-W
*/ kzhncku
public class SortUtil { JkazB1h
public final static int INSERT = 1; i6)$pARp
public final static int BUBBLE = 2; a_YE[6
public final static int SELECTION = 3; M@rknq@
public final static int SHELL = 4; +'$=\d^
public final static int QUICK = 5; C@` eYi
public final static int IMPROVED_QUICK = 6; ^D(N_va<
public final static int MERGE = 7; ZZf-c5g
public final static int IMPROVED_MERGE = 8; :7t~p&J
public final static int HEAP = 9; ?|8H|LBIr
M`$s dZ"
public static void sort(int[] data) { 0xVue[ep
sort(data, IMPROVED_QUICK); s[|sfqB1`
} 1&~u:RUXe
private static String[] name={ #Sj:U1x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *KO4H
}; 6,sZo!G
/wB<1b"
private static Sort[] impl=new Sort[]{ @,D 3$P8}
new InsertSort(), )W!8,e+%
new BubbleSort(), 8[SiIuIV
new SelectionSort(), [kx_Izi/T
new ShellSort(), 2T &<jt
new QuickSort(), gaaW:**y
new ImprovedQuickSort(), 0^4uZeW?
new MergeSort(), ZPWY0&9
new ImprovedMergeSort(), ~^QL"p:5|
new HeapSort() >|L,9lR_b
}; oHkF>B [
agqB#,i
public static String toString(int algorithm){ XSkN9LqZ
return name[algorithm-1]; dUOvv/,FZT
} kAbRXID
[Y_6PR
public static void sort(int[] data, int algorithm) { A.<HOx&#
impl[algorithm-1].sort(data); &k+G^ !=s#
} Paz yY
xQX,1NbH5
public static interface Sort { jk2h"):B>
public void sort(int[] data); $v?+X20
} 0 !yvcviw
XJ~_FiB
public static void swap(int[] data, int i, int j) { [vkz<sL"
int temp = data; M7&u_Cn?
data = data[j]; E~5r8gM,0
data[j] = temp; .L[WvAo
} F i?2sa
} L-\-wXg%