[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; rq=D[vX\N(
} &,~0*&r0
int i1=l; =P>c1T1-
int i2=mid+1; W6cA@DN$#
for(int cur=l;cur<=r;cur++){ aLzRbRv
if(i1==mid+1) 8&T6
data[cur]=temp[i2++]; 9[#9cv
else if(i2>r) #{97<sU\
data[cur]=temp[i1++]; yn&+ >{
else if(temp[i1] data[cur]=temp[i1++]; Z:51Q
else 5~ho1Ud
data[cur]=temp[i2++]; p) #7K
} )q#1C]7m*
} cO}`PD$i
7Uy49cs,
} gr]:u4}
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改进后的归并排序: Hqsj5j2i
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package org.rut.util.algorithm.support; y"5>O|`
c*iZ6j"iI
import org.rut.util.algorithm.SortUtil; yffg_^fR
@0js=3!2
/** H<6TN^
* @author treeroot )<Cf,R
* @since 2006-2-2 ean_/E
* @version 1.0 K7o!,['W
*/ `` !BE"yN
public class ImprovedMergeSort implements SortUtil.Sort { aB@D-Y"HO
{{'GR"D
private static final int THRESHOLD = 10; Z.:g8Xl-6
mRJX,
/* !2]eVO
* (non-Javadoc) df@r2 /Y
* 6[cC1a3r:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rK^Sn7U
*/ ShFC@)<lJ
public void sort(int[] data) { 7;]n+QRfm
int[] temp=new int[data.length]; h?UUd\RU)
mergeSort(data,temp,0,data.length-1); T&@xgj|!)
} WKjE^u
PWU8 9YXp
private void mergeSort(int[] data, int[] temp, int l, int r) { Rn] `_[)*~
int i, j, k; @D:$~4ks
int mid = (l + r) / 2; o u%Xnk~
if (l == r) Q[5j5vry
return; %5) 1^
if ((mid - l) >= THRESHOLD) R1CoS6
mergeSort(data, temp, l, mid); {& Pk$Q!
else #ZFedK0vv
insertSort(data, l, mid - l + 1); 55aJ=T
if ((r - mid) > THRESHOLD) ZjCT * qx
mergeSort(data, temp, mid + 1, r); iA=QK u!
else I.V?O}
insertSort(data, mid + 1, r - mid); k5s8s@
a!OS2Tz:
for (i = l; i <= mid; i++) { TgFj-"L\
temp = data; ?ykQ]r6a<
} tXlo27J
for (j = 1; j <= r - mid; j++) { 6xDYEvHS
temp[r - j + 1] = data[j + mid]; hT c VMc
} gmFCjs
int a = temp[l]; soSdlV{
int b = temp[r]; /iz{NulOz*
for (i = l, j = r, k = l; k <= r; k++) { /Mac:;W`
if (a < b) { 4<P=wK=a8X
data[k] = temp[i++]; u1@&o9
a = temp; HLD8W8
} else { 6R.%I{x'
data[k] = temp[j--]; xbZx&`(
b = temp[j]; 16;r+.FB'
} n2e#rn
} cM'\u~m{
} {xW HKsI>,
j=&]=0F
/** Wc6Jgpl
* @param data uv&??F]/
* @param l D's Tv}P
* @param i pQ:7%+Om
*/ y;'yob
private void insertSort(int[] data, int start, int len) { i.O670D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '>8IOC
} _zuaImJ0o
} `a$c6^a
} HUP~
} p,(gv])ie
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堆排序： 4Z'/dI`
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package org.rut.util.algorithm.support; !xqy6%p
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import org.rut.util.algorithm.SortUtil; EISgc {s
3I}(as{Rp
/** !]^,!7x,8j
* @author treeroot o#p{0y
* @since 2006-2-2 $oPx2sb
* @version 1.0 //x^[fkNq)
*/ Z}b25)
public class HeapSort implements SortUtil.Sort{ G)(vd0X1
fu=GgD*
/* (non-Javadoc) <%_7%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D@O#P^?
*/ (pDu
public void sort(int[] data) { G}|!Jdr
MaxHeap h=new MaxHeap(); As5*)o"&
h.init(data); ||xiKg
for(int i=0;i h.remove(); C[4{\3\Va
System.arraycopy(h.queue,1,data,0,data.length); SC Qr/Q
} [osIQ!u;:
eNQQ`ll@m
private static class MaxHeap{ ~g#$'dS
>EacXPt-O
void init(int[] data){ /-{C,+cB
this.queue=new int[data.length+1]; BXzn-S
for(int i=0;i queue[++size]=data; Bv=
fixUp(size); Qru iQ/t
} %>)HAx `
} CXAW>VdK_
nfj8z@!
private int size=0; ls;!Og9
5]c\{G
private int[] queue; B IW?/^
y TbOBl
public int get() { KxA^?,t[
return queue[1]; [|5gw3y
} >'/KOK"
o(gEyK
public void remove() { nq/SGo[c
SortUtil.swap(queue,1,size--); s%6{X48vY^
fixDown(1); L `\>_
} , z-#B]
file://fixdown 9"g!J|+
private void fixDown(int k) { (yr<B_Y'MY
int j; O ,9,=2j
while ((j = k << 1) <= size) { y E;n.L
if (j < size %26amp;%26amp; queue[j] j++; f4mQDRlD
if (queue[k]>queue[j]) file://不用交换 aSGZF w
break; N I*x):bx
SortUtil.swap(queue,j,k); yPn!1=-(
k = j; B$\,l.hE
} 6r]l8*34;
} u&E$(
private void fixUp(int k) { :j<ij]rsI
while (k > 1) { Ic<J]+Xq
int j = k >> 1; D#.N)@\
if (queue[j]>queue[k]) |/YwMBi
break; iXgy/>qgT
SortUtil.swap(queue,j,k); e`7dRnx&0
k = j; *WQl#JAr
} K/;*.u`:
} MEI.wJZ
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} Xc}~_.]
((AsZ$[S
} bTd94
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SortUtil： *7JsmN?
-(;<Q_'s{"
package org.rut.util.algorithm; iVUkM3
=[ +)T[
import org.rut.util.algorithm.support.BubbleSort; -50Nd=1
import org.rut.util.algorithm.support.HeapSort; fZ6-ap,u
import org.rut.util.algorithm.support.ImprovedMergeSort; {F'~1qf
import org.rut.util.algorithm.support.ImprovedQuickSort; 5ns.||%k
import org.rut.util.algorithm.support.InsertSort; jE#&u DfI
import org.rut.util.algorithm.support.MergeSort; YCBcyE}p
import org.rut.util.algorithm.support.QuickSort; GV"X) tGo
import org.rut.util.algorithm.support.SelectionSort; V,?BVt
import org.rut.util.algorithm.support.ShellSort; aCZ7G %Y
(+x!wX( x
/** (p1}i::Y8
* @author treeroot b\.l!vn0
* @since 2006-2-2 8o7%qWX
* @version 1.0 P.t0o~hoK;
*/ e.n*IJ_fz
public class SortUtil { hgU#2`fS
public final static int INSERT = 1; !xRboPg
public final static int BUBBLE = 2; U#mrbW
public final static int SELECTION = 3; 2@jlF!zC
public final static int SHELL = 4; Y@#rGV>
public final static int QUICK = 5; >39\u&)
public final static int IMPROVED_QUICK = 6; v-MrurQ4
public final static int MERGE = 7; P.>5`^
public final static int IMPROVED_MERGE = 8; },& =r= B
public final static int HEAP = 9; B s{n
Be4n\c.
public static void sort(int[] data) { p+y2w{{
sort(data, IMPROVED_QUICK); ixjhZki<
} FG{45/0We
private static String[] name={ F<Y>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "b6ew2\
}; RLE6=#4
(RM;T@`
private static Sort[] impl=new Sort[]{ 2+'4m#@)
new InsertSort(), >$/PfyY7@#
new BubbleSort(), hAvX{]
new SelectionSort(), 9`| ^cL*6
new ShellSort(), g+zfa.wQ
new QuickSort(), AfaoFn+
new ImprovedQuickSort(), Z{p62|+Ck@
new MergeSort(), ;#+Se,)
new ImprovedMergeSort(), {[tx^b
new HeapSort() >VE!3'/'
}; J12hjzk6@
UPr8Q^wm
public static String toString(int algorithm){ g>&b&X&Y_
return name[algorithm-1]; QP={b+8
} yrCY-'%
wS%j!|xhlV
public static void sort(int[] data, int algorithm) { ;R4qE$u2^
impl[algorithm-1].sort(data); bi<?m^j
} JXNfE,_
#-^y9B
public static interface Sort { l6y*SW5+
public void sort(int[] data); q*pWx]Y
} =e!o
o8h1
public static void swap(int[] data, int i, int j) { /q\{OsrX
int temp = data; _N2tf/C&=
data = data[j]; w}:&+B:
data[j] = temp; s<`54o ,
} nLjc.Z\Bl
} .`5BgX7W