[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; {e3XmVAI
} ]t23qA@^2
int i1=l; 2&k5X-Y
int i2=mid+1; Hf ]w
for(int cur=l;cur<=r;cur++){ {|jrYU.k~
if(i1==mid+1) DM73 Nn^5
data[cur]=temp[i2++]; %"1*,g{
else if(i2>r) MmvMuX]#)
data[cur]=temp[i1++]; (16U]s
else if(temp[i1] data[cur]=temp[i1++]; EE^ N01<"\
else 1l~(J:DT
data[cur]=temp[i2++]; }'FNGn.~#
} C8J3^?7E
} >`@c9 m
tR;? o,T
} +(*;F4>
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改进后的归并排序: =,UuQJ,l
l5}b.B^w
package org.rut.util.algorithm.support; \k8|3Y~g
9qqzCMrI0e
import org.rut.util.algorithm.SortUtil; Y?^1=9?6
&>0ape
/** +mr\AAFn
* @author treeroot @`hnp:
* @since 2006-2-2 @ZD/y%e
* @version 1.0 ~I+}u]J
*/ q,W6wM;,E
public class ImprovedMergeSort implements SortUtil.Sort { *>ilT5q
L&i_
private static final int THRESHOLD = 10; t]j4PNzn
@ k`^Z5tN
/* w(y#{!%+
* (non-Javadoc) Ke_&dgsq
* |<YoH$.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :N3'$M"
*/ /!u#S9_B
public void sort(int[] data) { Q]?Lg
int[] temp=new int[data.length]; vbZGs7%
mergeSort(data,temp,0,data.length-1); x+L G4++
} 1o;*`
@rTAbEk{U
private void mergeSort(int[] data, int[] temp, int l, int r) { GmA5E
int i, j, k; mp{r$tc
int mid = (l + r) / 2; iTt#%Fs)4M
if (l == r) nt"8kv
return; {O"?_6',
if ((mid - l) >= THRESHOLD) `wyX)6A|bt
mergeSort(data, temp, l, mid); 49BLJ|:P?
else [~ Wiy3n
insertSort(data, l, mid - l + 1); ^w+jPT-n
if ((r - mid) > THRESHOLD) {U`B|
mergeSort(data, temp, mid + 1, r); .Fz5K&E=
else f +#
insertSort(data, mid + 1, r - mid); K}]0<\N
zW@OSKq4
for (i = l; i <= mid; i++) { |?t6h 5Mt"
temp = data; )"&$.bWn
} K-xmLEu
for (j = 1; j <= r - mid; j++) { iz2I4 _N
temp[r - j + 1] = data[j + mid]; 0'DlsC/`*
} S[J=d%(
int a = temp[l]; ;T|y^D
int b = temp[r]; Rv ]?qJL
for (i = l, j = r, k = l; k <= r; k++) { Lnk!zj
if (a < b) { 3,snx4q (
data[k] = temp[i++]; pY3N7&m\:
a = temp; Ozygr?*X
} else { ~okIiC]#
data[k] = temp[j--]; bi fi02
b = temp[j]; G]Jchg <
} 8\M%\]_
} $jd>=TU|
} ^GXy:S$
^jO$nPDd
/** $ljgFmR_
* @param data ?|i6]y=D
* @param l /f_c?|
* @param i J.`z;0]op
*/ KAR XC,z
private void insertSort(int[] data, int start, int len) { j15TavjGh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^UF]%qqOn
} fs]9HK/@\
} ,tEvz
} 8Ee bWs*1
} 6zQ {Y"0
Y:nF.An3
堆排序： =jik33QV<
q4k)E
package org.rut.util.algorithm.support; ]~,V(K
mErXdb|L
import org.rut.util.algorithm.SortUtil; "EoC7 1
~urV`J
/** :'OCQ.[{s
* @author treeroot gyW*-:C
* @since 2006-2-2 @17hB h
* @version 1.0 q2I;Ly\3o
*/ c|N!ZYJI
public class HeapSort implements SortUtil.Sort{ N*PF&MyB
67I6]3[Z
/* (non-Javadoc) 7k<4/|CQ{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6~b~[gA
*/ )e)@_0
public void sort(int[] data) { K8dlECy
MaxHeap h=new MaxHeap(); ZCQ7xQD
h.init(data); CI+dIv>
for(int i=0;i h.remove(); q%4l!gzF3
System.arraycopy(h.queue,1,data,0,data.length); 4>4*4!KR}
} v-85`h
ILUA'T=B0
private static class MaxHeap{ dqMR<Nl&
q8:Z.<%8
void init(int[] data){ (K$K;f$"r
this.queue=new int[data.length+1]; GHHErXT\a
for(int i=0;i queue[++size]=data; qYg4H|6
fixUp(size); vqLC?{i+
} d[.kGytUt
} 2`#jw)dM;}
/j]r?KAzw
private int size=0; @!\g+z_"
p{j }%)6n
private int[] queue; @:@0}]%z9
,L+tm>I
public int get() { ]E66'
return queue[1]; /EUv=89{!
} eNlE]W,=
xMsos?5}
public void remove() { w5l:^^zF(
SortUtil.swap(queue,1,size--); K\&A}R
fixDown(1); {xw*H<"f<
} gmfux b/
file://fixdown b#-5b%ON
private void fixDown(int k) { 7N^9D H{`
int j; e~r%8.Wm
while ((j = k << 1) <= size) { 5_+vjV;5
if (j < size %26amp;%26amp; queue[j] j++; -OpI,qyS
if (queue[k]>queue[j]) file://不用交换 4#uWj?u
break; PsDks3cG
SortUtil.swap(queue,j,k); ?)#dP8n
k = j; M}4%LjD
} p\o=fcH%E
} +dm&XW >
private void fixUp(int k) { pmyHto"
while (k > 1) { J/j1Yf'9
int j = k >> 1; 09"C&X~
if (queue[j]>queue[k]) wVBY^TE
break; w>T1D
SortUtil.swap(queue,j,k); eI?<*
k = j; ^*C+^l&J!
} sXI_!)H
} 65VnH=
*LeFI%
} 3Ak,M-Jp
>Dpz0v
} A)En25,X
>_U)=q
SortUtil： GzK{.xf
4-[L^1%S[
package org.rut.util.algorithm; 8WU UE=p
[~bfM6Jw
import org.rut.util.algorithm.support.BubbleSort; vy#n7hdCc
import org.rut.util.algorithm.support.HeapSort; wKhuUZj{
import org.rut.util.algorithm.support.ImprovedMergeSort; 4KE"r F
import org.rut.util.algorithm.support.ImprovedQuickSort; SU"-%}~O#,
import org.rut.util.algorithm.support.InsertSort; CGIcuHp
import org.rut.util.algorithm.support.MergeSort; $]4^ENkI
import org.rut.util.algorithm.support.QuickSort; KyW6[WA9
import org.rut.util.algorithm.support.SelectionSort; 22|eiW/a
import org.rut.util.algorithm.support.ShellSort; vV1F|
p5^,3&
/** h&J6
* @author treeroot n6;jIf|
* @since 2006-2-2 i TY4X:x
* @version 1.0 d$s1l
*/ X'Q$v~/
public class SortUtil { \_FX}1Wc2.
public final static int INSERT = 1; In|:6YDL&
public final static int BUBBLE = 2; ~#iRh6^98
public final static int SELECTION = 3; KzZ! CB\
public final static int SHELL = 4; >2`)S{pBD
public final static int QUICK = 5; !*.mcIQT
public final static int IMPROVED_QUICK = 6; ^.,pq?_
public final static int MERGE = 7; ilQR@yp*
public final static int IMPROVED_MERGE = 8; ,#&lNQ'I
public final static int HEAP = 9; \`o+Le+%
&|u
public static void sort(int[] data) { OA2<jrGB!
sort(data, IMPROVED_QUICK); } ab@Nd$
} PygT_-3z{
private static String[] name={ $78fR8|r-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PJN TIa
}; au2ieZZ[
;A~S){
private static Sort[] impl=new Sort[]{ T%K(opISc(
new InsertSort(), XJsHy_6
new BubbleSort(), =)m2u2c M
new SelectionSort(), UiA\J
new ShellSort(), ~%_$e/T
new QuickSort(), ?:Y{c#w>
new ImprovedQuickSort(), }pj>BK>
new MergeSort(), ?"PUw3V3lB
new ImprovedMergeSort(), ?U~C= F?K
new HeapSort() 8Wid.o-U
}; K8doYN
n'0^l?V
public static String toString(int algorithm){ 4)+MvKxjS
return name[algorithm-1]; c|u{(E58
} #gi0FXL
-WwFUm
public static void sort(int[] data, int algorithm) { < i*v
impl[algorithm-1].sort(data); O5{!CT$
} p*F&G=ZE
vmL%%7
public static interface Sort { "T@9]>6.f
public void sort(int[] data); S*],18z?
} qyv9]Q1
%d*k3f }
public static void swap(int[] data, int i, int j) { 314PcSc
int temp = data; ^ruS
data = data[j]; d7qY(!&
data[j] = temp; :L&Bbw(
} xn1
} G!k&'{2