[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; qdwjg8fo4Z
} cB4p.iO
int i1=l; e2Df@8>
int i2=mid+1; 29k\}m7l<*
for(int cur=l;cur<=r;cur++){ JDm7iJxc_
if(i1==mid+1) }tPI#[cfK
data[cur]=temp[i2++]; F}4jm,w
else if(i2>r) Y-G;;~
data[cur]=temp[i1++]; htHnQ4Q
else if(temp[i1] data[cur]=temp[i1++]; ZJ}|t
else oT[8Iu
data[cur]=temp[i2++]; z/t+t_y
} ym6gj#2m
} bS*oFm@u
/;xmM2B'
} Gu\lV c
c{cJ>d 0
改进后的归并排序: 6Ej@;]^^-
xyRZ v]K1
package org.rut.util.algorithm.support; 2w67>w\
>@StKj
import org.rut.util.algorithm.SortUtil; X]v.Yk=wu
k?ksv+e\
/** MUqV$#4@I
* @author treeroot (C!33s1
* @since 2006-2-2 J2Eb"y>/;
* @version 1.0 Pt8 U0)i)
*/ Xw<Nnvz6
public class ImprovedMergeSort implements SortUtil.Sort { a[Oi
X5wYfN
private static final int THRESHOLD = 10; Wj#Gm
AE&IN.-
/* }|4dEao\
* (non-Javadoc) jl~?I*Gr
* &ajpD sz;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ($Y6hn+
*/ a%)-iL X8&
public void sort(int[] data) { "ju0S&
int[] temp=new int[data.length]; R{A$hnhW6
mergeSort(data,temp,0,data.length-1); %SD=3UK6
} %2TjG
Mwd(?o
private void mergeSort(int[] data, int[] temp, int l, int r) { 1U< g
int i, j, k; M}BqSzd*
int mid = (l + r) / 2; \hFIg3
if (l == r) m\?H <o0
return; Jp]eFaqp
if ((mid - l) >= THRESHOLD) l]v>PIh~N
mergeSort(data, temp, l, mid); Rjz~n38.
else KsBi<wY
insertSort(data, l, mid - l + 1); RE}$(T=
if ((r - mid) > THRESHOLD) ({#M*=&"
mergeSort(data, temp, mid + 1, r); fS(IN~
else (lR9x6yf
insertSort(data, mid + 1, r - mid); 1b-_![&]1
h?ZxS
for (i = l; i <= mid; i++) { x"QZ}28(t
temp = data; [p# }=&d
} yZ]u{LJS
for (j = 1; j <= r - mid; j++) { p@+r&Mg%W"
temp[r - j + 1] = data[j + mid]; a'2^kds
} #Jqa_$\.
int a = temp[l]; Q`7.-di
int b = temp[r]; ?O<D&CvB
for (i = l, j = r, k = l; k <= r; k++) { [Oy5Td7[
if (a < b) { &p#$}tm
data[k] = temp[i++]; PK<+tIm\
a = temp; p!xCNZ(m
} else { G@Y!*ZH*f
data[k] = temp[j--]; _}(ej&'f
b = temp[j]; ^E(:nxQ6s
} dr iw\
} Kt3]r:&J
} 9k[>(LC
_r&,n\ T
/** 'lD"{^
* @param data xf]_@T;
* @param l a@&P\"k
* @param i O#962\
*/ y}t1r |p
private void insertSort(int[] data, int start, int len) { oWo/QNw9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &KS*rHgt?
} H~Fb=.h]U
} kKP<K+hH
} xLmgr72D
} 5g(`U+,*(
o)pso\;
堆排序： N\9Wxz$
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package org.rut.util.algorithm.support; ^N\$oV$
a{FCg%vD)
import org.rut.util.algorithm.SortUtil; Gn8'h TM
1||\3L/
/** #[C=LGi
* @author treeroot _rU%DL?
* @since 2006-2-2 1SGLA"r
* @version 1.0 x<es1A'u6
*/ MQ{.%
public class HeapSort implements SortUtil.Sort{ o6[aP[~F
V"`t*m$
/* (non-Javadoc) J@vL,C)E6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t5Oeb<REz
*/ O.% $oV
public void sort(int[] data) { nPU=n[t8O
MaxHeap h=new MaxHeap(); J*} warf&
h.init(data); ]F4.m
for(int i=0;i h.remove(); L d;))e
System.arraycopy(h.queue,1,data,0,data.length); /:OSql5K*<
} Z.DO 2=+=
TppuEC>
private static class MaxHeap{ A3|hFk
~DYv6-p%
void init(int[] data){ 2aR<xcSg
this.queue=new int[data.length+1]; (6Tvu5*4U
for(int i=0;i queue[++size]=data; 6SGV}dAx
fixUp(size); 5v`[c+@F
} 'M'k$G@Z
} -FGQn |h4
C@3`n;yZ=
private int size=0; F?B`rw@xr
$ rU"Krf67
private int[] queue; 1\aJ[t
%7y8a`}
public int get() { /5$;W'I
return queue[1]; /)<x<7FKW
} ym=7EY?o
4ru-qF
public void remove() { ;qN;oSK
SortUtil.swap(queue,1,size--); cfP9b8JG
fixDown(1); !|#W,9
} ?~p]Ey}~9
file://fixdown w4fz!l]
private void fixDown(int k) { y k{8O.g
int j; 0lm7'H*~
while ((j = k << 1) <= size) { H-|%\9&{S
if (j < size %26amp;%26amp; queue[j] j++; Ap<kK0#h
if (queue[k]>queue[j]) file://不用交换 ZZu{ct9
break; :[r/ Y
SortUtil.swap(queue,j,k); '=X)0GG
k = j; Sr#\5UDS
} [Ep%9(SgA'
} Na$eeM
private void fixUp(int k) { $"P[nNW3
while (k > 1) { DQ*T2*L
int j = k >> 1; nUy.gAb
if (queue[j]>queue[k]) * ",/7(
break; fR$_=WWN>h
SortUtil.swap(queue,j,k); :yi?<
k = j; 9-3, DxZ}
} {gkzo3
} bQlvb
g]Jt (aYK
} /L yoTBG
BtA_1RO
} 3HEm-pok
)p^" J|
SortUtil： $&~moAl
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package org.rut.util.algorithm; m0Geq.
bpx ^
import org.rut.util.algorithm.support.BubbleSort; Db`SNk=
import org.rut.util.algorithm.support.HeapSort; dtT:,&
import org.rut.util.algorithm.support.ImprovedMergeSort; ?l9j]
import org.rut.util.algorithm.support.ImprovedQuickSort; -Is;cbfLj/
import org.rut.util.algorithm.support.InsertSort; j"F?^0aR,Q
import org.rut.util.algorithm.support.MergeSort; I?&/J4o:
import org.rut.util.algorithm.support.QuickSort; #=g1V?D
import org.rut.util.algorithm.support.SelectionSort; 1p5n}|
import org.rut.util.algorithm.support.ShellSort; 1)o6jGQ
>'1[Bh
/** }] p9
* @author treeroot ?yc{@|
* @since 2006-2-2 v6M4KC2?
* @version 1.0 y<g1q"F
*/ MO>9A,&f
public class SortUtil { 9$?Sts}6&
public final static int INSERT = 1; JyO2P
public final static int BUBBLE = 2; )UCc!
public final static int SELECTION = 3; Iz^vt#b
public final static int SHELL = 4; cE;n>ta"F
public final static int QUICK = 5; bQ3txuha
public final static int IMPROVED_QUICK = 6; (yb$h0HN
public final static int MERGE = 7; l@)`Q
public final static int IMPROVED_MERGE = 8; \47djmG-
public final static int HEAP = 9; lHUd<kEC
lz7?Z
public static void sort(int[] data) { }6_*i!68"U
sort(data, IMPROVED_QUICK); Lc#GBaJ
} .0Kc|b=w
private static String[] name={ Uc;~q-??#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K0YQ b&*k
}; m{;j r<
p9>1a j2a
private static Sort[] impl=new Sort[]{ k5%W8dI
new InsertSort(), -|GKtZ]}
new BubbleSort(), uCr :+"C
new SelectionSort(), ?o6X_UxW!
new ShellSort(), M>_vsI^I'
new QuickSort(), k-Yli21-/|
new ImprovedQuickSort(), QR2S67-
new MergeSort(), 9{wRqY
new ImprovedMergeSort(), 3;RQ\{eM
new HeapSort() GEK7q<
}; 'Qh1$X)R7a
T-LX>*
public static String toString(int algorithm){ kV+%(Gl8
return name[algorithm-1]; c'.XC}
} lvsj4cT
!-t,r%CG
public static void sort(int[] data, int algorithm) { O9C&1A|lA
impl[algorithm-1].sort(data); eaAGlEW6J
} [{$%9lm
\%|Xf[AX
public static interface Sort { /%mT2
public void sort(int[] data); ;1HzY\d%<
} q6,z 1A"
|h?2~D!+d
public static void swap(int[] data, int i, int j) { +CM>]Ze
int temp = data; 4*ZY#7h
data = data[j]; .ht-*
data[j] = temp; M!46^q~-
} :sQ>oNnz
} _U_O0@xi