[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; ]di^H>,xU
} xY=%+o.?*
int i1=l; =/Lwprj
int i2=mid+1; xQ]^wT.Q
for(int cur=l;cur<=r;cur++){ #~JR_oQE!
if(i1==mid+1) <@](uWu
data[cur]=temp[i2++]; \F; S
else if(i2>r) 5bZjW~d
data[cur]=temp[i1++]; e,X{.NS
else if(temp[i1] data[cur]=temp[i1++]; 4b@Awtk
else O:J;zv\
data[cur]=temp[i2++]; tK0Ksnl^
} @p\te7(P%
} 5*#3v:l/9
{L#+v~d^'n
} 4iPxtVT
X }""= S<
改进后的归并排序: wvnuE<o8
CKuf'h#
package org.rut.util.algorithm.support; 37U2Tb!y'
qt.Y6s:r_
import org.rut.util.algorithm.SortUtil; gP^p7aYwn
D8O&`!mf
/** |bM?Q$>~
* @author treeroot Cvgk67C=$
* @since 2006-2-2 .B?J@,
* @version 1.0 ~USU\dni
*/ 9^zA(
public class ImprovedMergeSort implements SortUtil.Sort { oScKL#Hu
r.vezsH
private static final int THRESHOLD = 10; *ak"}s
@&F\M}
/* T!ik"YZ@i
* (non-Javadoc) a{y"vVQOF
* 0{k*SCN#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4f-I,)qCBk
*/ bkSI1m3
public void sort(int[] data) { W*!u_]K>
int[] temp=new int[data.length]; >>I~v)a>w
mergeSort(data,temp,0,data.length-1); \)/dFo\l
} '7ps_pz
km=d'VvnI
private void mergeSort(int[] data, int[] temp, int l, int r) { Eo@b)h
int i, j, k; {sR|W:fS$
int mid = (l + r) / 2; 79y'PFSms
if (l == r) b'mp$lt!
return; uupfL>h
if ((mid - l) >= THRESHOLD) wQR0R~|M
mergeSort(data, temp, l, mid); #*v:.0%
else [7+dZL[
insertSort(data, l, mid - l + 1); ,^m;[Dl7
if ((r - mid) > THRESHOLD) \1H~u,a
mergeSort(data, temp, mid + 1, r); Eq82?+9
else B.ar!*X
insertSort(data, mid + 1, r - mid); "l7))>lL
dp=#|!jc
for (i = l; i <= mid; i++) { [+_0y[~,tB
temp = data; cq,8^o&
} cpJ(77e
for (j = 1; j <= r - mid; j++) { c%O8h
temp[r - j + 1] = data[j + mid]; kfQi}D'a
} /q\{OsrX
int a = temp[l]; slRD /
int b = temp[r]; >ZjGs8&
for (i = l, j = r, k = l; k <= r; k++) { >6\rhx>
if (a < b) { _N2tf/C&=
data[k] = temp[i++]; \66j4?H#
a = temp; KU5|~1t 4
} else { y'21)P
data[k] = temp[j--]; 1XD|H_JG<j
b = temp[j]; xZ.c@u6:
} q#|,4(Z
} |`c=`xK7'
} r_?il]l
=c1t]%P,
/** `GQ'yv
* @param data |-! yKB
* @param l HyX:4f|]'
* @param i D$$,T.'u
*/ mO~A}/je
private void insertSort(int[] data, int start, int len) { ")?NCun>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |8<P%:*N
} 0//B+.#
} tc4"huG
} TLC&@o :
} qt&zo5
l;'#!hC)
堆排序： p#6V|5~8
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package org.rut.util.algorithm.support; o*}--d?S
ZA!yw7~
import org.rut.util.algorithm.SortUtil; SeX:A)*ez%
?RI&7699+
/** tM&;b?bJ[
* @author treeroot oyt#CHX
* @since 2006-2-2 yDn8{uI
* @version 1.0 /`"&n1
*/ U2@Mxw
public class HeapSort implements SortUtil.Sort{ ocbNf'W;
N-9qNLSP
/* (non-Javadoc) @*}?4wU^k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SGUu\yS&s
*/ LnY`f -H
public void sort(int[] data) { [Dou%\
MaxHeap h=new MaxHeap(); )VoQ/ch<
h.init(data); ]%8f-_fSy
for(int i=0;i h.remove(); ;;cPt44s
System.arraycopy(h.queue,1,data,0,data.length); qZ79IX'y
} F')fi0=
sM0o,l(5
private static class MaxHeap{ oPVyLD
QTKN6P
void init(int[] data){ \'AS@L"Wj^
this.queue=new int[data.length+1]; Z/hk)GI
for(int i=0;i queue[++size]=data; R]8^ @i1
fixUp(size); 7Rix=*
} x-3!sf@
} IX]K"hT
+CF"Bm8@
private int size=0; sH}q&=
:lGH31GG
private int[] queue; 2-#:Y
h~zG*B5F
public int get() { 4X^{aIlshk
return queue[1]; _#mo6')j
} hExw}c
tm[e?+Iq
public void remove() { y!;PBsU%Sx
SortUtil.swap(queue,1,size--); `4N{x.N
fixDown(1); Pa}B0XBWP
} LtDQgel"
file://fixdown pHpHvSI
private void fixDown(int k) { @T6Z3Zj}
int j; G>q16nS~KP
while ((j = k << 1) <= size) { 5HAIKc
if (j < size %26amp;%26amp; queue[j] j++; >tFv&1iR
if (queue[k]>queue[j]) file://不用交换 Zagj1OV|
break; A7SE>e>
SortUtil.swap(queue,j,k); EE<^q?[3^
k = j; ^Nu0+S
} \h&ui]V
} :1O1I2L0
private void fixUp(int k) { 0-9.u`)#yu
while (k > 1) { Z;XiA<|
int j = k >> 1; AvNU\$B4aG
if (queue[j]>queue[k]) |y*-)t
break; *i>?YT
SortUtil.swap(queue,j,k); k5=VH5{S
k = j; V;V,G+0Re
} OSsxO(;g
} S ;; Z
8%;K#,>
} O^AF+c\n
cIIt ;q[
} U.[?1:v
er[%Nt+99
SortUtil： /KWR08ftp
0B;cQSH!q
package org.rut.util.algorithm; s, 8a1o
G\U'_G>
import org.rut.util.algorithm.support.BubbleSort; b35Z1sfD j
import org.rut.util.algorithm.support.HeapSort; (^Q:zU
import org.rut.util.algorithm.support.ImprovedMergeSort; 3hrODts
import org.rut.util.algorithm.support.ImprovedQuickSort; UOg4E
import org.rut.util.algorithm.support.InsertSort; H%*<t}
import org.rut.util.algorithm.support.MergeSort; P(Fd|).j$
import org.rut.util.algorithm.support.QuickSort; RRBokj)]
import org.rut.util.algorithm.support.SelectionSort; +&p}iZp
import org.rut.util.algorithm.support.ShellSort; Q6|~ks+Y
q~K KN /N
/** =c>w
* @author treeroot guC7!P^
* @since 2006-2-2 Jf,)Y>EI
* @version 1.0 bBFdr
*/ !w[io;
public class SortUtil { %!>~2=Q2*
public final static int INSERT = 1; _Wjd`*
public final static int BUBBLE = 2; aB(6yBBoxj
public final static int SELECTION = 3; [AZN a
public final static int SHELL = 4; _IK@K6V1
public final static int QUICK = 5; VTQxg5P c
public final static int IMPROVED_QUICK = 6; y@L-qO+{&
public final static int MERGE = 7; 8jnz;;|
public final static int IMPROVED_MERGE = 8; NNt,J;
public final static int HEAP = 9; c<8RRYs
JBsHr%!i
public static void sort(int[] data) { "1U:qr2-H
sort(data, IMPROVED_QUICK); gD\ =
} MR/8
private static String[] name={ $6c8<!B_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l]s,CX
}; ^:0epj7
<u"h'e/oW_
private static Sort[] impl=new Sort[]{ U1>VKP;5Nn
new InsertSort(), {cNH|
new BubbleSort(), '~1uJ0H
new SelectionSort(), Q6?}/p
new ShellSort(), vIoV(rc+
new QuickSort(), #\[((y:q
new ImprovedQuickSort(), c==` r C
new MergeSort(), 6L~tUe.G
new ImprovedMergeSort(), J)w58/`?t
new HeapSort() @Ik@1
}; 4}~zVT0'~
}/%(7Ff{
public static String toString(int algorithm){ ^}-(8~_en
return name[algorithm-1]; {ER%r'(4Z
} 6tE<`"P!
=/k*w#j
public static void sort(int[] data, int algorithm) { O!b >
impl[algorithm-1].sort(data); COx<X\
} `dYM+ jpa
88dq8T4
public static interface Sort { amL8yb
public void sort(int[] data); (L)tC*Qjc
} >?$+hZz<
~ "]6
public static void swap(int[] data, int i, int j) { 8%UI<I,
int temp = data; 2[\I{<2/9
data = data[j]; 7DU"QeLeb
data[j] = temp; 3zO'=gwJ
} 0aMw
} ,Z7tpFC