[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; !uaV6K
} 6ww4ZH?j
int i1=l; aLr\Uq,83
int i2=mid+1; m1,?rqeb
for(int cur=l;cur<=r;cur++){ 1J$sIY,Ou
if(i1==mid+1) yEYlQ=[#
data[cur]=temp[i2++]; OVr, {[r
else if(i2>r) TR2X' `:O
data[cur]=temp[i1++]; CX](^yU_
else if(temp[i1] data[cur]=temp[i1++]; CKJ9YKu{W
else L,!3
data[cur]=temp[i2++]; Jpi\n- d!
} "[f"h
} V}?d ,.m`{
)$18a
} >T'=4n['
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改进后的归并排序: C.SGm
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package org.rut.util.algorithm.support; C@!C='b,
Z";~]]$!Y
import org.rut.util.algorithm.SortUtil; K9JW&5Q
x!6&)T?!n
/** K$>C*?R
* @author treeroot H.\gLIr
* @since 2006-2-2 3yNILj
* @version 1.0 #$!(8>YJ
*/ kpc3l[.A
public class ImprovedMergeSort implements SortUtil.Sort { "`pI!nj
Vc}#Ok
private static final int THRESHOLD = 10; wc#+Yh6
hh\\api
/* .j*muDVQn
* (non-Javadoc) CV/ei,=9
* ex_Zw+n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F8e]sa$K\
*/ t__UqCq~h
public void sort(int[] data) { nCMv&{~
int[] temp=new int[data.length]; c.5?Q>!+
mergeSort(data,temp,0,data.length-1); q}-q[p? 5
} bMT1(edm
1~! 4
private void mergeSort(int[] data, int[] temp, int l, int r) { j3j<01rq
int i, j, k; |\g=ua+h
int mid = (l + r) / 2; 4]c.mDo[T
if (l == r) =-#>NlB$w
return; JZ#O"rF
if ((mid - l) >= THRESHOLD) _D%aT6,G+(
mergeSort(data, temp, l, mid); z[kz[
else @ 2r9JqR[=
insertSort(data, l, mid - l + 1); j$%KKl8j
if ((r - mid) > THRESHOLD) Cx>iSx
mergeSort(data, temp, mid + 1, r); W,</
else 9f ,$JjX[
insertSort(data, mid + 1, r - mid); ;XFo:?
4k9O6
for (i = l; i <= mid; i++) { f.?p"~!
temp = data; N?!]^jI,
} sflH{!;p
for (j = 1; j <= r - mid; j++) { 0fgt2gA33
temp[r - j + 1] = data[j + mid]; p|mt2oDjw
} Ap}^6_YXd
int a = temp[l]; fbF *C V
int b = temp[r]; BR1oE3in
for (i = l, j = r, k = l; k <= r; k++) { l{U-$}
if (a < b) { 9b`J2_ ]k
data[k] = temp[i++]; U=_O*n?N-d
a = temp; XA`<*QC<
} else { .PyPU]w
data[k] = temp[j--]; FI@!7@
b = temp[j]; @^47Qgj8U
} v-`RX;8
} @eQIwz
} 1+;Z0$edxz
%T:~N<8)
/** _c*0Rr
* @param data r)$(>/[$
* @param l U 00}jH
* @param i QdaYP
*/ ya7/&Z )0
private void insertSort(int[] data, int start, int len) { g70B22!y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <^j,jX
} wOH$S=Ba5,
} 5a moK7
} yp%7zrU
} j6wdqa9!~
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堆排序： l4c9.'6
ur\v[k=
package org.rut.util.algorithm.support; Sp+ zP-3
D[) Z$+D4f
import org.rut.util.algorithm.SortUtil; c`]_Q1'30w
{Lj]++`fB]
/** k@1\ULo
* @author treeroot NFT&\6!o
* @since 2006-2-2 _F|oL|
* @version 1.0 9!hiCqA&
*/ _~m@ SI
public class HeapSort implements SortUtil.Sort{ #K1VPezN
v]CH L# |
/* (non-Javadoc) s{v!jZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AH$D./a
*/ [d="94Ab
public void sort(int[] data) { FX QUj&9
MaxHeap h=new MaxHeap(); t!MGSB~
h.init(data); %u"3&kOV
for(int i=0;i h.remove(); 3D3/\E#'o
System.arraycopy(h.queue,1,data,0,data.length); w i,}sEoM
} yyZV/ x~
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private static class MaxHeap{ [[(29|`]
T%kr&XsQX
void init(int[] data){ tuzw%=Ey
this.queue=new int[data.length+1]; *g =ey?1S
for(int i=0;i queue[++size]=data; 0pT?qsM2
fixUp(size); ^J,Zl`N
} Kj|l]'
} g9 .b6}w!
OQt_nb#z`{
private int size=0; X-$~j+YC
{j%'EJ5
private int[] queue; Dh=?Hzw
m44Ab6gpsb
public int get() { Bi7QYi/
return queue[1]; ~Rx:X4|H
} 1-`Il]@?8
2l5>>yY
public void remove() { 0fhz7\a^_<
SortUtil.swap(queue,1,size--); E<u6 js,
fixDown(1); I^h^QeBis
} $@t]0
file://fixdown d>j`|(\
private void fixDown(int k) { :q_(=EA
int j; K&2{k+w
while ((j = k << 1) <= size) { kWVaHZr
if (j < size %26amp;%26amp; queue[j] j++; R pUq#Y:a
if (queue[k]>queue[j]) file://不用交换 cE3g7(a
break; *3;H6
SortUtil.swap(queue,j,k); 9os>k*
k = j; ~(Wq 5<v
} /"w%?Ea
} CmyCne
private void fixUp(int k) { R-Y07A
while (k > 1) { oWg"f*
int j = k >> 1; V/C":!;
if (queue[j]>queue[k]) E1)7gio
break; ygiZ~v4P/
SortUtil.swap(queue,j,k); L1'R6W~%dN
k = j; !zc?o?~z
} ~I'1\1
} {OA2';3
~\;s}Fv.
} Bp #:sAG
M^f+R'Q3
} cB,O"-
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SortUtil： hfUN~89;
5Oh>rK(
package org.rut.util.algorithm; Uy$1X
MM_c{gFF
import org.rut.util.algorithm.support.BubbleSort; [wHGt?R
import org.rut.util.algorithm.support.HeapSort; 8UY[$lc
import org.rut.util.algorithm.support.ImprovedMergeSort; |Nx7jGd:i
import org.rut.util.algorithm.support.ImprovedQuickSort; Tf[o'=2
import org.rut.util.algorithm.support.InsertSort; #^|"dIZ_M
import org.rut.util.algorithm.support.MergeSort; NGsG4y^g?z
import org.rut.util.algorithm.support.QuickSort; ;Mzy>*#$Q
import org.rut.util.algorithm.support.SelectionSort; tGq0f"}'J
import org.rut.util.algorithm.support.ShellSort; OAGI|`E$/-
C!a#M{:
/** *^|.bBG
* @author treeroot AmSrc.
* @since 2006-2-2 ^*!Tq&Dst|
* @version 1.0 {<f |h)r
*/ Yz6+ x]
public class SortUtil { *qM)[XO
public final static int INSERT = 1; [nL{n bli
public final static int BUBBLE = 2; u">KE6um
public final static int SELECTION = 3; fa~4+jx>S
public final static int SHELL = 4; U]!~C 1cmw
public final static int QUICK = 5; ,E YB E
public final static int IMPROVED_QUICK = 6; FVi7gg.?
public final static int MERGE = 7; puE!7:X7
public final static int IMPROVED_MERGE = 8; {,kA'Px)
public final static int HEAP = 9; ZboY]1L[j
VZ69s{/.B
public static void sort(int[] data) { PcxCal4
sort(data, IMPROVED_QUICK); >M`ryM2=D
} W7R`})F
private static String[] name={ tv,Z>&OM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6S`J7[
}; ix.I)
g!<=NVhYt
private static Sort[] impl=new Sort[]{ ;:2:f1_
new InsertSort(), aaa6R|>0
new BubbleSort(), D\"F?>
new SelectionSort(), #`kLU:
new ShellSort(), {:peArO
new QuickSort(), (g>8!Gl
new ImprovedQuickSort(), x(r>iy
new MergeSort(), TOH!vQP
new ImprovedMergeSort(), h3.6<vM
new HeapSort() 57nSyd]PR
}; Y*}xD;c k
tN-U,6c]
public static String toString(int algorithm){ VB(S]N)F^
return name[algorithm-1]; 7Pb:z4j
} {Z~5#<t
M.*3qWM
public static void sort(int[] data, int algorithm) { 5!tiu4LU
impl[algorithm-1].sort(data); 2.6F5&:($
} "$@Wy,yp
9/LnO'&-
public static interface Sort { -FxE!K
public void sort(int[] data); JZc"4qf@OT
} R:[IH2F s
KUR9vo
public static void swap(int[] data, int i, int j) { c)5d-3"
int temp = data; @'D ,T^I
data = data[j]; "q<}#]u
data[j] = temp; OVy ZyZ#
} {y>o6OTITR
} E:!qncL: