[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; 73#x|lY
} [YrHA~=U
int i1=l; 0$+fkDf
int i2=mid+1; G0O#/%%
for(int cur=l;cur<=r;cur++){ Vm}%ttTC
if(i1==mid+1) mI*[>#q>
data[cur]=temp[i2++]; oh"O07
else if(i2>r) h7*W*Bd
data[cur]=temp[i1++]; `Q3s4VEC
else if(temp[i1] data[cur]=temp[i1++]; |tR OL9b
else v:Tzv^
data[cur]=temp[i2++]; r_e7a6
} =0;}K@(J
} uEyH2QO
gBh;=vOD
} km^^T_ M/
Ofm%:}LV
改进后的归并排序: AcI,N~~
VvFC -r,=G
package org.rut.util.algorithm.support; ")O`mXg-
VhjM>(
import org.rut.util.algorithm.SortUtil; joKIrS0y
Uw,2}yR
/** 53-v|'9'
* @author treeroot ;zM*bWh9
* @since 2006-2-2 1&;QyTN
* @version 1.0 -[U1]R
*/ wn_b[tdxq
public class ImprovedMergeSort implements SortUtil.Sort { x8\A<(G_M=
PHA-9\jC{
private static final int THRESHOLD = 10; ;S0Kh"A
8]4U`\k4
/* A;\7|'4
* (non-Javadoc) %AOja+
* W^3uEm&l!)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 322jR4QGr
*/ ]EwVpvTw
public void sort(int[] data) { r]3'74j:
int[] temp=new int[data.length]; JpsPNa
mergeSort(data,temp,0,data.length-1); <E\$3Ym9
} H$G0`LP0/a
!T](Udf
private void mergeSort(int[] data, int[] temp, int l, int r) { J!'@Bd
int i, j, k; yV_4?nh
int mid = (l + r) / 2; h/B>S
if (l == r) "qc6=:y}
return; .9md~j:o^s
if ((mid - l) >= THRESHOLD) yQ#:J9HMJ
mergeSort(data, temp, l, mid); kJWN.
else #Z6'?p9
insertSort(data, l, mid - l + 1); L?5Ck<!xG
if ((r - mid) > THRESHOLD) hx/N1x
mergeSort(data, temp, mid + 1, r); "4vy lHIo
else Dfq(Iv
insertSort(data, mid + 1, r - mid); Hwo$tVa:=
T3`ludm^u
for (i = l; i <= mid; i++) { tmqY2.
temp = data; 1x,[6H
} aK`@6F,]j
for (j = 1; j <= r - mid; j++) { atXS-bg*
temp[r - j + 1] = data[j + mid]; Qs9gTBS;
} DW)2 m;
int a = temp[l]; DJgTA]$&
int b = temp[r]; b~nAPY6
for (i = l, j = r, k = l; k <= r; k++) { OKFtl
if (a < b) { /-#I_>:8'
data[k] = temp[i++]; yHxosxd<*
a = temp; M33_ja+L
} else { ~z"=G5|
data[k] = temp[j--]; r}uz7}z %"
b = temp[j]; D#&q&6P{
} nLV9<M Zm
} y*D]Q`5cag
} Oft4-4$E
sP^R/z|Y
/** [s&$l G!
* @param data V+I|1{@i0
* @param l tv!_e$CR
* @param i a'!zG cT
*/ QtvYv!
private void insertSort(int[] data, int start, int len) { [HCAmnb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +la2n(CAK
} pv&y91
} B<C*
} KiJT!moB
} O(+phRwJ
}:Z#}8
堆排序： H,N)4;F<c
=m5SK5vLKT
package org.rut.util.algorithm.support; ?_I[,N?@41
NJNJjdD>
import org.rut.util.algorithm.SortUtil; SRDXfkoI
X^WrccNX
/** JPGzrEaZ
* @author treeroot 7"8hC
* @since 2006-2-2 +[5.WC7J
* @version 1.0 Qx[t/~
*/ qIld;v8w"g
public class HeapSort implements SortUtil.Sort{ -WYAN:s
P;k0W>~k
/* (non-Javadoc) z)HD`Ho
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h,Q3oy\s1
*/ QR1{ w'c
public void sort(int[] data) { d>{nQF;c
MaxHeap h=new MaxHeap(); 44-R!
h.init(data); <vXGi
for(int i=0;i h.remove(); 8P=o4lO+
System.arraycopy(h.queue,1,data,0,data.length); C`5
} OK\A</8r
w: >5=mfk
private static class MaxHeap{ cK 06]-Y
=b/L?dR.-
void init(int[] data){ -&<Whhs.@
this.queue=new int[data.length+1]; ^a#X9
for(int i=0;i queue[++size]=data; Offu9`DiZ
fixUp(size); Me=CSQqf<
} Br`IW
} tO0!5#-VR
/PLn+-
private int size=0; y~75r\"R
&gjF4~W]
private int[] queue; qbv#I;
q`pP$i:
public int get() { |^A;&//
return queue[1]; F{UP;"8'
} e@IA20
d9q(xZ5
public void remove() { :H c0b=
SortUtil.swap(queue,1,size--); 5|1T}Z#;
fixDown(1); zToq^T
} l&[;rh
file://fixdown 3\Xbmq8}
private void fixDown(int k) { 0Q^Ikiv
int j; CxfRVL`7
while ((j = k << 1) <= size) { A\#iXOd
if (j < size %26amp;%26amp; queue[j] j++; Aj0Tfdxy
if (queue[k]>queue[j]) file://不用交换 2 aL)
break; VZ\B<i
SortUtil.swap(queue,j,k); A,`8#-AX
k = j; VqS#waNrx
} kcQ'$<Mz<
} FXs*vg`
private void fixUp(int k) { 4n4?4BEn
while (k > 1) { hiUD]5Kp
int j = k >> 1; 8H_l:Z[:i
if (queue[j]>queue[k]) D_x+:1(
break; 4T=u`3pD7l
SortUtil.swap(queue,j,k); kV38`s>+
k = j; N2w"R{)j\
} 0C>%LJ8r
} 5sb\r,kW
eQ&ZX3*}
} . Z%{'CC
3K_A<j:
} f/V 2f].
7P9=)$(EH
SortUtil： 1Uqu>'
,dx3zBI
package org.rut.util.algorithm; PK"c4>q
"70WUx(\t
import org.rut.util.algorithm.support.BubbleSort; G8;w{-{m
import org.rut.util.algorithm.support.HeapSort; S*n@81Z
import org.rut.util.algorithm.support.ImprovedMergeSort; *f?4
import org.rut.util.algorithm.support.ImprovedQuickSort; u{*SX k
import org.rut.util.algorithm.support.InsertSort; K#U<ib-v
import org.rut.util.algorithm.support.MergeSort; T8HF|%I
import org.rut.util.algorithm.support.QuickSort; KhMSL
import org.rut.util.algorithm.support.SelectionSort; _N@ro
import org.rut.util.algorithm.support.ShellSort; 2"B_At
n+PzA[
/** 0D&t!$Ibf
* @author treeroot SGe^ogO"v
* @since 2006-2-2 rSJ9v:
* @version 1.0 ?|39u{
*/ M{*Lp6h
public class SortUtil { |gU(s
public final static int INSERT = 1; `+uhy,
public final static int BUBBLE = 2; (x3.poSt
public final static int SELECTION = 3; .<Zy|1 4
public final static int SHELL = 4; c.j$9=XLBG
public final static int QUICK = 5; ,L`$09\
public final static int IMPROVED_QUICK = 6; p8]68!=W\F
public final static int MERGE = 7; |Z*J/v'@p
public final static int IMPROVED_MERGE = 8; }5(Ho$S(
public final static int HEAP = 9; ka3u&3"
vo#UtN:q
public static void sort(int[] data) { D`VM6/iQR
sort(data, IMPROVED_QUICK); ph-ATJ"
} PZ*pQ=`
private static String[] name={ %Jrt4sg[j-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 67VT\f
}; di>cMS 4 c
L*~J%7
private static Sort[] impl=new Sort[]{ R>(@ZM&
new InsertSort(), dx+hhg\L
new BubbleSort(), $]/Zxd
new SelectionSort(), jb^N|zb
new ShellSort(), oDU ;E
new QuickSort(), ruazOmnn~
new ImprovedQuickSort(), mzf+Cu:`v
new MergeSort(), k0Uyf~p~
new ImprovedMergeSort(), !H}vu]R
new HeapSort() t>[KVVg W
}; (4Zts0O\
Qu]z)";7
public static String toString(int algorithm){ !OuWPH. :
return name[algorithm-1]; Gqy,u3lE
} =-}[^u1
I:d[Q s
public static void sort(int[] data, int algorithm) { :=[XW?L%x
impl[algorithm-1].sort(data); n8DxB@DI
} KFFSv{m[
|K|h+fgG6*
public static interface Sort { g'|MA~4yB
public void sort(int[] data); 3dRr/Ilc
} H[='~%D
I;1lX L
public static void swap(int[] data, int i, int j) { ?A )hN8
int temp = data; d:i;z9b@to
data = data[j]; MKWyP+6`
data[j] = temp; #Z<a
} 6KOlY>m]
} 1"e)5xI