[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; >lM l
} 8HdAFRw
int i1=l; ^G-@06/!
int i2=mid+1; b>9>uC@J15
for(int cur=l;cur<=r;cur++){ >yh2Lri
if(i1==mid+1) 00U> F
data[cur]=temp[i2++]; /H+a0`/
else if(i2>r) SK.: Q5:
data[cur]=temp[i1++]; GvlS%
else if(temp[i1] data[cur]=temp[i1++]; BL58] P84
else L4?IHNB
data[cur]=temp[i2++]; !5?<% *
} o%*xvH*A
} c6/=Gq{.
P L+sR3bR
} r!{Up7uL
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改进后的归并排序: dGTsc/$
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package org.rut.util.algorithm.support; G9@0@2aY8
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import org.rut.util.algorithm.SortUtil; BDZ?Ez\Sg
9JKEw
/** $,fX:x
* @author treeroot cPc</[x[W
* @since 2006-2-2 rk)`\=No
* @version 1.0 `pZm?}K
*/ ##4HYQ%E
public class ImprovedMergeSort implements SortUtil.Sort { N$:8,9.z
-RK- Fu<e
private static final int THRESHOLD = 10; 8kDp_si
XHGFf_kW_N
/* R_S.tT!
* (non-Javadoc) vEz"xz1j!]
* *siFj CN<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N=g"(%
*/ &XUiKnNW
public void sort(int[] data) { R .2wqkY
int[] temp=new int[data.length]; L\z~uo3:
mergeSort(data,temp,0,data.length-1); %BB%pC
} (0kK_k'T
IRqy%@)
private void mergeSort(int[] data, int[] temp, int l, int r) { !m?-!:
int i, j, k; QUQ'3
int mid = (l + r) / 2; "`1bA"E
if (l == r) #@nezu2
return; 2Q:+_v
if ((mid - l) >= THRESHOLD) m/EFHS49
mergeSort(data, temp, l, mid); 0%I=d
else 5rZ
insertSort(data, l, mid - l + 1); 4x[S\,20
if ((r - mid) > THRESHOLD) ~gRf:VXX=_
mergeSort(data, temp, mid + 1, r); 2P{Gxz<#
else OprkR
insertSort(data, mid + 1, r - mid); YQA,f#
S#} KIy
for (i = l; i <= mid; i++) { g_COp"!~9
temp = data; Z0r?|G0
} nwCrZW
for (j = 1; j <= r - mid; j++) { zjoq6
temp[r - j + 1] = data[j + mid]; "AGLVp.zT
} *<ewS8f*6
int a = temp[l]; Alw3\_X
int b = temp[r]; ]-QA'Lq
for (i = l, j = r, k = l; k <= r; k++) { B~Xw[q
if (a < b) { \d$!a5LF}
data[k] = temp[i++]; N^:9Fz
a = temp; #|PS&}6wU
} else { wz ~d(a#
data[k] = temp[j--]; m$T-s|SY
b = temp[j]; }Y36C.@H
} p,i[W.dy.'
} _~iw[*#u
} m5Di=8
S\!ana])
/** d <JM36j?
* @param data x>`%DwoRI
* @param l x39<6_?G
* @param i .];=Pu^
*/ 9o:Lz5o
private void insertSort(int[] data, int start, int len) { 03S]8l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $,Yd>%Y
} K?$^@N
} P;]F(in=
} ysf~|r4s
} o"R7,N0rB
j Dv{/)
堆排序： zi*R`;_`,
:$BCRQ
package org.rut.util.algorithm.support; v9O~@v{=
/,Re"!jh
import org.rut.util.algorithm.SortUtil; xLH)P<^`C
PQ$%H>{
/** ?|B&M\}g
* @author treeroot { W{]L:
* @since 2006-2-2 )*x6 FfTUd
* @version 1.0 *U=s\
*/ k4y'b
public class HeapSort implements SortUtil.Sort{ KE3;V2Ym f
]R9HyCl&a6
/* (non-Javadoc) tQYM&6g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ls:w8&`*
*/ (7=!+'T"
public void sort(int[] data) { !6>~?gNd
MaxHeap h=new MaxHeap(); cI?8RF(;
h.init(data); (tw)nF
for(int i=0;i h.remove(); 3c6b6
System.arraycopy(h.queue,1,data,0,data.length); 0-yp,G
} H{?vbqQ
Bj-:#P@
private static class MaxHeap{ @Y<bwv
!"/n/jz
void init(int[] data){ e)#J1(j_
this.queue=new int[data.length+1]; 8=uu8-l8g
for(int i=0;i queue[++size]=data; .-oxb,/
fixUp(size); ^pF&`2eD
} OGg>#vj,s
} =Bhe'.]QSx
d,Yw5$i
private int size=0; };jN\x?&q
8sTp`}54J
private int[] queue; A5R<p+t6
<X9T-b"$h
public int get() { 7j{Te)"
return queue[1]; aSxG|OkKy
} ]s}aC9I
|4LQ\'N&
public void remove() { $R3.yX=[\
SortUtil.swap(queue,1,size--); *%]+sU
fixDown(1); s:G[Em1
} %j!z\pa
file://fixdown xg4T` ])
private void fixDown(int k) { ^S:cNRSW"
int j; Ty(yh(oYF`
while ((j = k << 1) <= size) { 4E,hcu
if (j < size %26amp;%26amp; queue[j] j++; CrT2#h 1#
if (queue[k]>queue[j]) file://不用交换 /6A:J]Q_
break; Fj36K6!#?
SortUtil.swap(queue,j,k); y`T--v3mI
k = j; u_hE7#i
} 1'gKZB)TG7
} ,$ho2R),Fn
private void fixUp(int k) { &P{o{
while (k > 1) { S]Sp Z8
int j = k >> 1; o x03c
if (queue[j]>queue[k]) kwDjK"
break; 0:PH[\Z
SortUtil.swap(queue,j,k); y_;]=hEL
k = j; AD0ptHUBa
} ZJ)3GF}4
} cS. 7\0$
7/[TE
} YY1{v?[
A?^A*e
} o9DYr[
A} x_zt
SortUtil： `ja`#%^\u
_3-RoA'UZr
package org.rut.util.algorithm; `lH1IA/3
,'/HcF?yf
import org.rut.util.algorithm.support.BubbleSort; HMl!?%%
import org.rut.util.algorithm.support.HeapSort; OtrXYiKB
import org.rut.util.algorithm.support.ImprovedMergeSort; Wo<PmSt9i
import org.rut.util.algorithm.support.ImprovedQuickSort; wC4AVJJ^>
import org.rut.util.algorithm.support.InsertSort; tU-#pB>H
import org.rut.util.algorithm.support.MergeSort; P':]A{<Z
import org.rut.util.algorithm.support.QuickSort; t1*BWY
import org.rut.util.algorithm.support.SelectionSort; {7j6$.7J$&
import org.rut.util.algorithm.support.ShellSort; 6&/ Ew4 e
o`JlXuG?o
/** qcpG}o+&D
* @author treeroot @ ~0G$
* @since 2006-2-2 9Y!0>&o
* @version 1.0 ?[NTw./'7A
*/ )- Wn'C'Z
public class SortUtil { k*zc5ev}
public final static int INSERT = 1; 71}L#nQ
public final static int BUBBLE = 2; %nG~u,_2f
public final static int SELECTION = 3; 2\$WP-)%
public final static int SHELL = 4; Y3sNr)qss
public final static int QUICK = 5; p: Q%Lg_I
public final static int IMPROVED_QUICK = 6; R?={{+O
public final static int MERGE = 7; jN5} 2 p*
public final static int IMPROVED_MERGE = 8; !z"a_
public final static int HEAP = 9; y~#R:&d"
0|wKR|zW
public static void sort(int[] data) { {YxSH%
sort(data, IMPROVED_QUICK); /4f 5s#hR
} 5K_N
private static String[] name={ k7Be'E BKG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C7c|\T
}; OJC*|kN-#^
Fc{6*wtO
private static Sort[] impl=new Sort[]{ hBYh90]
new InsertSort(), ?@,f[U-
new BubbleSort(), \CEnOq
new SelectionSort(), k:HSB</}
new ShellSort(), 1_dMe%53
new QuickSort(), .k!k-QO5La
new ImprovedQuickSort(), 9<0$mE^:
new MergeSort(), 19YJ`(L`x
new ImprovedMergeSort(), #k|g9`
new HeapSort() 07G*M ]
}; Y&cjJ`rw
[(.T%kJ
public static String toString(int algorithm){ 59%f|.Z)
return name[algorithm-1]; MWd_6XM
} 88+\mX;A#
*{p&Fy55
public static void sort(int[] data, int algorithm) { {1-CfQ0 8
impl[algorithm-1].sort(data); 3<.j`JB@&
} VlQwVe
9rvxp;
public static interface Sort { (qc!-Isd~[
public void sort(int[] data); jP7+s.j>
} 6w`}+3
LZAj4|~,m
public static void swap(int[] data, int i, int j) { \]e w@C
int temp = data; ]F)-}
data = data[j]; />j+7ts
data[j] = temp; }rAN2D]"}
} HY|=Z\l"
} HE6kt6