[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; [07N<<
} xw-x<7
int i1=l; z^ +CD-
int i2=mid+1; u/FnA-L4
for(int cur=l;cur<=r;cur++){ {t: ZMUV
if(i1==mid+1) >b;fhdd:4
data[cur]=temp[i2++]; E^S[8=
else if(i2>r) jnFCtCB
data[cur]=temp[i1++]; X#mm Z;P
else if(temp[i1] data[cur]=temp[i1++]; +r)'?zU
else 11}fPWK
data[cur]=temp[i2++]; .?b2Bd!MC
} .fxI)
} CQfrAk4mu
ShanwaCDqv
} &F"Mkyf
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改进后的归并排序: po_||NIY
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package org.rut.util.algorithm.support; k))*Sg
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import org.rut.util.algorithm.SortUtil; TDg#O!DUF
}~dXz?{p8
/** '>[KVvm
* @author treeroot Mn+;3qo{6
* @since 2006-2-2 yvo~'k#c
* @version 1.0 '01H8er
*/ |i-Qfpn
public class ImprovedMergeSort implements SortUtil.Sort { cOra`7L`
0j%@P[zQ
private static final int THRESHOLD = 10; *zX*k7LnV
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/* WlP#L`
* (non-Javadoc) MP,l*wVd
* QZk:G+$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vTYI ez`g
*/ ?iG}Qj@5
public void sort(int[] data) { MJ[#Gq\0R
int[] temp=new int[data.length]; DG1 >T
mergeSort(data,temp,0,data.length-1); Xg.'<.!g0
} /E(H`;DG
=9n$at$l@
private void mergeSort(int[] data, int[] temp, int l, int r) { BM{GSX
int i, j, k; M*| y&XBe
int mid = (l + r) / 2; eSXt"t
if (l == r) I,Q"<?&
return; >L/Rf8j&
if ((mid - l) >= THRESHOLD) !o &+
mergeSort(data, temp, l, mid); VP=(",`
else KC o<%
insertSort(data, l, mid - l + 1); Y-&r_s_~
if ((r - mid) > THRESHOLD) >%+"-bY
mergeSort(data, temp, mid + 1, r); ]aq!@rDX
else wJh|$Vn
insertSort(data, mid + 1, r - mid); HTI1eLZ2
u814ZN}
for (i = l; i <= mid; i++) { %*P59%
temp = data; o#E 3{zM
} mnL \c'
for (j = 1; j <= r - mid; j++) { 1Nx.aji
temp[r - j + 1] = data[j + mid]; LU4\&fd
} 5bFE;Y;
int a = temp[l]; *=0Wh@?0
int b = temp[r]; PEZElB;
for (i = l, j = r, k = l; k <= r; k++) { 1d!7GrD F
if (a < b) { 4vTO #F
data[k] = temp[i++]; ~\/>b}^uf'
a = temp; 0CI?[R\
} else { I})la!9
data[k] = temp[j--]; ?HVsIAU
b = temp[j]; ws tI8">
} {rGq|Bj
} Vn? %w~0!
} I"@X~Y7}
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/** :SG9ygq'
* @param data XEV-D9n
* @param l l?(nkg["nY
* @param i +Uq9C-Iu
*/ (?xGlV`n
private void insertSort(int[] data, int start, int len) { qf+jfc(Iby
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %([$v6y
} nul?5{z@
} tC\x9&:
} lO8.Q"mxo
} F1R91V|
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堆排序： %@$h?HP
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package org.rut.util.algorithm.support; QRdNi1&M
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import org.rut.util.algorithm.SortUtil; j>eL&.d
~j3B'
/** Yqmx]7Y4
* @author treeroot #NNj#
* @since 2006-2-2 (}O)pqZ>
* @version 1.0 Km]N scq1
*/ JWy$` "{
public class HeapSort implements SortUtil.Sort{ 1O45M/5\o
I!jSAc{
/* (non-Javadoc) C!XI0d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rfYu8-
*/ c }ivYH?`w
public void sort(int[] data) { MjE.pb
MaxHeap h=new MaxHeap(); _baqN!N
h.init(data); 'LFHZ&-
for(int i=0;i h.remove(); mLk@&WxG
System.arraycopy(h.queue,1,data,0,data.length); H#k"[eZ
} *x`z5_yfO
aRq7x~j )\
private static class MaxHeap{ 8_>\A= E
a\vf{2
void init(int[] data){ b@^M|h.Va
this.queue=new int[data.length+1]; @iUzRsl
for(int i=0;i queue[++size]=data; 3`TC*
fixUp(size); vQ+}rHf`[
} yNc>s/
} Yc=y Vh
|_F-Abk
private int size=0; ,TOLr%+v~n
X~0l1 @!
private int[] queue; kR^7Z7+#*
Y@KZ:0<
public int get() { uByF*}d1
return queue[1]; ,M7sOp6}
} f Otrn
H24g+<Tv
public void remove() { POH>!lHu
SortUtil.swap(queue,1,size--); qS&PMQ"$
fixDown(1); Qat%<;P2
} FvG9PPd
file://fixdown "x9xJ
private void fixDown(int k) { cLr? B;FS
int j; 1?(BWX)7
while ((j = k << 1) <= size) { E}k#-+u<S4
if (j < size %26amp;%26amp; queue[j] j++; eN/sW!:P|
if (queue[k]>queue[j]) file://不用交换 sl6p/\_w
break; wuzz Wq
SortUtil.swap(queue,j,k); }K~JM1(26
k = j; KblOP{I
} kjaz{&P
} ><LIOFqsS
private void fixUp(int k) { bw%1*;n)
while (k > 1) { T 6QnCmB4
int j = k >> 1; >]:R{1h
if (queue[j]>queue[k]) qqw6p j
break; Q)#<T]~=
SortUtil.swap(queue,j,k); ;T#t)oV
k = j; k%hD<_:p
} E|97zc
} (&x~pv"+
?[RG8,B
} vR,HCI
hp-<8Mf
} G]P4[#5
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SortUtil： %T'?7^\>
4Xz6JJ1U[H
package org.rut.util.algorithm; WU<#_by g
<$?:|
import org.rut.util.algorithm.support.BubbleSort; 6sP;O,UX
import org.rut.util.algorithm.support.HeapSort; ~|DF-t V
import org.rut.util.algorithm.support.ImprovedMergeSort; V]q{N-Iq
import org.rut.util.algorithm.support.ImprovedQuickSort; u:HKmP;
import org.rut.util.algorithm.support.InsertSort; Xid>8
import org.rut.util.algorithm.support.MergeSort; Ub3,x~V
import org.rut.util.algorithm.support.QuickSort; q{U -kuui
import org.rut.util.algorithm.support.SelectionSort; te6[^_k
import org.rut.util.algorithm.support.ShellSort; ^]U2Jd
!-N!80
/** 7[D0n7B@
* @author treeroot X[@>1tl
* @since 2006-2-2 *uEU9fX
* @version 1.0 S BFhC
*/ Y\+^\`Tqu
public class SortUtil { IC}zgvcW
public final static int INSERT = 1; LrPDpTd
public final static int BUBBLE = 2; .z[+sy_
public final static int SELECTION = 3; g!~j Wn?A
public final static int SHELL = 4; gKYn*
public final static int QUICK = 5; }\823U %
public final static int IMPROVED_QUICK = 6; e\yj>tQJg
public final static int MERGE = 7; V?_%Y<|L
public final static int IMPROVED_MERGE = 8; dtF6IdAf
public final static int HEAP = 9; @%#(Hse
\&TTe8
public static void sort(int[] data) { cU{LyZp
sort(data, IMPROVED_QUICK); +Og O<P
} 20fCWVw}?}
private static String[] name={ fLD9RZ8_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ix(4<s
}; M j5C0P(
ZzKn,+
private static Sort[] impl=new Sort[]{ BbU&e z8P
new InsertSort(), W2<X 5'
new BubbleSort(), 0(i`~g5
new SelectionSort(), 8vT:icl
new ShellSort(), 2sU"p5 j
new QuickSort(), BKDWd]KEf
new ImprovedQuickSort(), w}YHCh
new MergeSort(), )j9FB
new ImprovedMergeSort(), ]$L[3qA.
new HeapSort() +\W"n_PPy
}; .s!:p pwl
v,M2|x\r}
public static String toString(int algorithm){ t[Q^Xp
return name[algorithm-1]; TM"-X\e~{
} JfVayI=
<;XJ::d
public static void sort(int[] data, int algorithm) { Ee|@l3)
impl[algorithm-1].sort(data); >N,G@{FR
} CD[7h
#ERn 8k
public static interface Sort { fk"{G>&8
public void sort(int[] data); Ja (/ym^
} ScTqnY$v
$(NfHIX
public static void swap(int[] data, int i, int j) { w+MdQ@'5
int temp = data; }`MO}Pz
data = data[j]; l,X;<&-[
data[j] = temp; z)0VP QMT
} c3}}cFe
} w1}[lq@