[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; P]^BE;7T
} YZdV0-S
int i1=l; (~IoRhp^
int i2=mid+1; 7cQFH@SC
for(int cur=l;cur<=r;cur++){ o|cx?
if(i1==mid+1) Cm"7f!(#
data[cur]=temp[i2++]; oniVC',
else if(i2>r) wl.a|~-
data[cur]=temp[i1++]; PP-U.
else if(temp[i1] data[cur]=temp[i1++]; ^&Vj m
else A)%!9i)
data[cur]=temp[i2++]; MBn ZO
} 2L(\-]%f
} 7.y35y
mDdL7I
} LX8A@Yct
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改进后的归并排序: }.k*4Vw#Wt
1@:BUE;jZ
package org.rut.util.algorithm.support; Ys@OgdS@:
Q)[DSM
import org.rut.util.algorithm.SortUtil; qokCVI-\
]tx/t^&/\u
/** YAP,#a
* @author treeroot HD_ #-M
* @since 2006-2-2 : *8t,f~s^
* @version 1.0 J?%ecCN
*/ w.o>G2u
public class ImprovedMergeSort implements SortUtil.Sort { zL!}YR@&u"
:\F1S:&P
private static final int THRESHOLD = 10; {oftZXwf
RRUv_sff
/* }h+{>{2j
* (non-Javadoc) 7!g"q\s
* K0fuN)C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q+7+||RW
*/ z]/!4+
public void sort(int[] data) { .LI(2lP
int[] temp=new int[data.length]; 7CwQmVe+
mergeSort(data,temp,0,data.length-1); Ib(G!oO:E-
} (.pi,+Ws
V\nj7Gr:sF
private void mergeSort(int[] data, int[] temp, int l, int r) { 3EV?=R
int i, j, k; 9<Ks2W.N
int mid = (l + r) / 2; ~J![Nx/
if (l == r) qYP;`L}o#
return; J{U 171
if ((mid - l) >= THRESHOLD) ]o?r(1
mergeSort(data, temp, l, mid); f=hT o!i
else VOSq%hB
insertSort(data, l, mid - l + 1); z 4qEC
if ((r - mid) > THRESHOLD) z7_h$v
mergeSort(data, temp, mid + 1, r); \C<'2KZR,
else {|B 2$1':
insertSort(data, mid + 1, r - mid); %Y-5L;MI
e'A1%g)
for (i = l; i <= mid; i++) { #h}a
temp = data; Mc~L%5
} 7 MS-Gs|
for (j = 1; j <= r - mid; j++) { |,Kk#`lW<f
temp[r - j + 1] = data[j + mid]; @]YEOk-
} kB9@ &t+
int a = temp[l]; 43,baeG
int b = temp[r]; ]^53Qbrv
for (i = l, j = r, k = l; k <= r; k++) { r m
if (a < b) { 0uu)0:
data[k] = temp[i++]; VHm.uL_UW
a = temp; ntQW+!s;P
} else { /:@)De(S
data[k] = temp[j--]; 6~OJB!
b = temp[j]; kgHZaQnD
} ~e_
} z?n6l7sH
} pIHpjx
` >loleI
/** cD t|v~
* @param data 12@Ge]
* @param l 4rLc] >
* @param i #T=e p0
*/ `96MXP
private void insertSort(int[] data, int start, int len) { (#BOcx5J]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dpvEY(Ds
} }g& KT!r
} `=lo.c
} LP'~7FG
} K;ocs?rk/
7J1f$5$m5
堆排序： O%f{\Fr
9-Z?
package org.rut.util.algorithm.support; biG :Xn
3BSZz%va
import org.rut.util.algorithm.SortUtil; }wZsM[NDB
:JU$6
/** ;+1ooeU
* @author treeroot cB)tfS4)
* @since 2006-2-2 pJJOy
* @version 1.0 lNz1|nS(Kd
*/ Dy*K;e-+
public class HeapSort implements SortUtil.Sort{ E|A~T7G=
z.|[g$F
/* (non-Javadoc) OF0v0Y/a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @KRia{
*/ `CRF E5
public void sort(int[] data) { 0oe2X1.%
MaxHeap h=new MaxHeap(); j;I(w [@P
h.init(data); fohZ&f|>
for(int i=0;i h.remove(); DzIV5FG
System.arraycopy(h.queue,1,data,0,data.length); 1)3'Y2N*
} 07]9VJa
>abpse
private static class MaxHeap{ L2c\i
A;k#8&;
void init(int[] data){ r4ljA@L
this.queue=new int[data.length+1]; U]W"
for(int i=0;i queue[++size]=data; {55f{5y3 c
fixUp(size); ehLn+tg
} KGGnypx`
} X]D:vuB
a'g&1N0Rc
private int size=0; 'w=aLu5dY
>2v<;.
private int[] queue; X|yVRQ?F`
6n|][! f
public int get() { _S,UpR~2W
return queue[1]; Gx*B(t]4y
} 3 }3C*w+
0+k..l
public void remove() { +R7pdi
SortUtil.swap(queue,1,size--); BSL+Gjj~}
fixDown(1); Fkg%_v$
} ^Rtxef
file://fixdown IBUFXzl
private void fixDown(int k) { h;@>E:4Tg
int j; 9e4`N"#,lI
while ((j = k << 1) <= size) { P$]K
if (j < size %26amp;%26amp; queue[j] j++; \;iOQqv0&
if (queue[k]>queue[j]) file://不用交换 p(cnSvg
break; E.*gKfL
SortUtil.swap(queue,j,k); ^%m{yf#
k = j; f&txg,W,yv
} x|gYxZ
} %{Obhj;c
private void fixUp(int k) { ]E)D})r`#
while (k > 1) { u08j9) ,4
int j = k >> 1; [E+J=L.l
if (queue[j]>queue[k]) =q>lP+
break; ,M:[GuXD<
SortUtil.swap(queue,j,k); NV==[$(r
k = j; Uw| -d[!
} FAdTp.
} o+L[o_er
m2&Vm~Py6b
} ^Nu j/
"3'a.b akw
} J*_^~t
S<jiy<|`
SortUtil： `sA xk
'blMwD{0&\
package org.rut.util.algorithm; 0~P]Fw^w
;mg.} fI
import org.rut.util.algorithm.support.BubbleSort; FLZ9Rg
import org.rut.util.algorithm.support.HeapSort; s:cJF
import org.rut.util.algorithm.support.ImprovedMergeSort; #K*p1}rf
import org.rut.util.algorithm.support.ImprovedQuickSort; pNZ3vTs6
import org.rut.util.algorithm.support.InsertSort; *>HS>#S
import org.rut.util.algorithm.support.MergeSort; !E|R3eX_
import org.rut.util.algorithm.support.QuickSort; A'Z!l20_
import org.rut.util.algorithm.support.SelectionSort; k2fJ
import org.rut.util.algorithm.support.ShellSort; gvPHB+#A
S(^YTb7
/** &kn?=NW
* @author treeroot BS?i!Bm7
* @since 2006-2-2 72/ bC
* @version 1.0 -8vGvI>
*/ Y;iI=U
public class SortUtil { ] _W'-B
public final static int INSERT = 1; B.KK@
public final static int BUBBLE = 2; CEBu[TT/9
public final static int SELECTION = 3; ]1eZ<le`6
public final static int SHELL = 4; hTWZIW@
public final static int QUICK = 5; 0!RP7Sx
public final static int IMPROVED_QUICK = 6; F/,6Jh
public final static int MERGE = 7; $5\!ws<cZ
public final static int IMPROVED_MERGE = 8; {=,G>p
public final static int HEAP = 9; %_!0V*X*
rP,|
public static void sort(int[] data) { [P0c,97_ H
sort(data, IMPROVED_QUICK); j'Q0DF=GV
} ]HB1JJiS~
private static String[] name={ BG)zkn$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t,'J%)j
}; X"mPRnE330
+Z-{6C
private static Sort[] impl=new Sort[]{ X-Ev>3H
new InsertSort(), :fnJp9c
new BubbleSort(), %Pl |3i
new SelectionSort(), AZ4:3}
new ShellSort(), ^uphpABpD
new QuickSort(), >;F}>_i
new ImprovedQuickSort(), /reGT!u
new MergeSort(), x>,wmk5)
new ImprovedMergeSort(), (kyRx+gA
new HeapSort() ic3Szd^4
}; VKfpk^rU
#f;6Ia>#
public static String toString(int algorithm){ .:4*HB
return name[algorithm-1]; I+ 3qu=
} 6xY6EC
}eI9me@Aa
public static void sort(int[] data, int algorithm) { mKyF<1,m
impl[algorithm-1].sort(data); wAgVevE
} tk:nth
j^v<rCzc(
public static interface Sort { ]Nw]po+
public void sort(int[] data); gwsOw [;k
} O/$41mK+!
>|gXE>
public static void swap(int[] data, int i, int j) { 8r:T&)v
int temp = data; smn(q)tt
data = data[j]; v-^<,|vm2f
data[j] = temp; GMkni'pV
} 8|$g"?CU
} 9~2iA,xs