[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; F&^u1RYz
} +d<o2n4!
int i1=l; G#UO>i0jy
int i2=mid+1; i6aM}p<
for(int cur=l;cur<=r;cur++){ i!(u4wTFF
if(i1==mid+1) `$05+UU
data[cur]=temp[i2++]; T< D&%)
else if(i2>r) nwf(`=TC
data[cur]=temp[i1++]; b:2#3;)
else if(temp[i1] data[cur]=temp[i1++]; ,VI2dNst\
else |Y4c+6@_
data[cur]=temp[i2++]; p[>!;qI
} f]Xh7m(Gh
} rytves%;C
0tK(:9S
} m9 1Gc?c
|cs]98FEf
改进后的归并排序: ]De<'x}
1N,</<"
package org.rut.util.algorithm.support; qx|~H'UuBN
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import org.rut.util.algorithm.SortUtil; UyENzK<%u
~6DaM!
/** &sJ-&7YZ
* @author treeroot \8g'v@$wG
* @since 2006-2-2 VX0}x+LJ
* @version 1.0 L xP%o
*/ Y'*oW+K
public class ImprovedMergeSort implements SortUtil.Sort { &.F]-1RN[
f}=>c|Do
private static final int THRESHOLD = 10; H}?"2jF
id+ ~ V
/* ?k@^U9?R
* (non-Javadoc) Ir#]p9:x
* F$M^}vsjGx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pLSh +*F
*/ FJCs$0
public void sort(int[] data) { 7H.3.j(L
int[] temp=new int[data.length]; ?fW['%
mergeSort(data,temp,0,data.length-1); e>0gE`8A
} DaP,3>M
{.eo?dQ
private void mergeSort(int[] data, int[] temp, int l, int r) { *O_>3Hgl
int i, j, k; >jz9o9?8
int mid = (l + r) / 2; xu\s2x$
if (l == r) w$iQ,--
return; R#HVrzOO|T
if ((mid - l) >= THRESHOLD) ^p)#;$6b
mergeSort(data, temp, l, mid); 8wV`mdKN
else FRa>cf4
insertSort(data, l, mid - l + 1); B`|f"+.
if ((r - mid) > THRESHOLD) |P@N}P@
mergeSort(data, temp, mid + 1, r); $7" Y/9Y
else 6%it`A8}
insertSort(data, mid + 1, r - mid); :CLWmMC_
bbM^J
for (i = l; i <= mid; i++) { dIW@L
temp = data; rU+3~|m
} MX? *jYl
for (j = 1; j <= r - mid; j++) { ?8N^jjG
temp[r - j + 1] = data[j + mid]; SSxp!E'
} ,BUrZA2\U$
int a = temp[l]; 1oe,>\\
int b = temp[r]; >dx/k)~~-L
for (i = l, j = r, k = l; k <= r; k++) { `*6|2
if (a < b) { [;H-HpBaa
data[k] = temp[i++]; kMJ}sS
a = temp; $GP66Ev
} else { 60;_^v
data[k] = temp[j--]; eSQkW
b = temp[j]; d~ +(g!
} _B>'07D0
} ^"<x4e9+j
} 'Lq+ONX5
& .0A%
/** {0~\T[qm
* @param data )(0if0D4
* @param l Ge_fU'F
* @param i DQ(0:r
*/ yDfH`]i)U
private void insertSort(int[] data, int start, int len) { /poGhB1k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); elAWQEus
} }4N'as/ZO
} 8OKG@hc
} qg{gCG
} 7HkFDI()1
}f;WYz5
堆排序： /{f"0]-RA
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package org.rut.util.algorithm.support; &Ts!#OcB,
!m^;wkrY
import org.rut.util.algorithm.SortUtil; GF6o
,A'| Z
/** "I66@d?
* @author treeroot ~P#mvQE)
* @since 2006-2-2 0N^+d,Xt.
* @version 1.0 ltfKqY-
*/ <3!Al,!ej@
public class HeapSort implements SortUtil.Sort{ .u>[m.
D%~tU70a
/* (non-Javadoc) iLch3[p%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m^!:n$
*/ o2X95NiH
public void sort(int[] data) { :`e#I/,
MaxHeap h=new MaxHeap(); V1B!5N<
h.init(data); 5mQ@&E~#W
for(int i=0;i h.remove(); 2HtsSS#0Q
System.arraycopy(h.queue,1,data,0,data.length); KF zI27r
} +@=V}IO
yAfwQ$Ll7
private static class MaxHeap{ q[_qZ
yfK}1mx)j
void init(int[] data){ VxBBZsZO~
this.queue=new int[data.length+1]; ;+<IWDo
for(int i=0;i queue[++size]=data; }%p:Xv@X!
fixUp(size); I%u 2 ce
} -Y@tx fu-
} 9Q=VRH:
@oE 5JM
private int size=0; xRe`Duy:
RI@\cJ\}
private int[] queue; T/\RViG3
y QClq{A
public int get() { x>}ml\R
return queue[1]; "aOs#4N
} RqgN<&g?
U xBd14-R_
public void remove() { kzKej"a;
SortUtil.swap(queue,1,size--); 2uOYuM[7gH
fixDown(1); (oi:lC@h*
} h{gFqkDoTI
file://fixdown `wXK&R<`
private void fixDown(int k) { ]:OrGD"
int j; B~w$j/sWU
while ((j = k << 1) <= size) { ,U3
if (j < size %26amp;%26amp; queue[j] j++; N$6e KJ]
if (queue[k]>queue[j]) file://不用交换 I)rO|
break; ;.V/ngaj
SortUtil.swap(queue,j,k); .JPN';
k = j; x=t(#R m
} 3Do0?~n
} >x{("``D0y
private void fixUp(int k) { )GkJ%o#H2
while (k > 1) { 6@s!J8!
int j = k >> 1; f^FFn32u
if (queue[j]>queue[k]) 7pm'b,J<
break; r }lGcG)
SortUtil.swap(queue,j,k); N[po)}hp
k = j; ?qNU*d
} d.FU))lmD
} x="Wqcnj{
B+K6(^j,,y
} Q,[G?vbj
-B;#pTG
} SLKplLO
O;H6`JQ
SortUtil： j{%;n40$
%rylmioW>
package org.rut.util.algorithm; V4+|D2
#RBrii-,
import org.rut.util.algorithm.support.BubbleSort; ;=y"Z^
import org.rut.util.algorithm.support.HeapSort; :j]1wp+
import org.rut.util.algorithm.support.ImprovedMergeSort; E`.xu>Yyj
import org.rut.util.algorithm.support.ImprovedQuickSort; s*k)h,\
import org.rut.util.algorithm.support.InsertSort; j6GIB_
import org.rut.util.algorithm.support.MergeSort; a_RY Yj
import org.rut.util.algorithm.support.QuickSort; |}z)>E
import org.rut.util.algorithm.support.SelectionSort; )A\ ZS<@Z7
import org.rut.util.algorithm.support.ShellSort; wXKtQ#o}
hq 3n&/
/** Nap[=[rv
* @author treeroot vN Bg&m
* @since 2006-2-2 |NuMDVd+s
* @version 1.0 ~[HzGm%
*/ CRK%^3g
public class SortUtil { ;Z]Wj9iY
public final static int INSERT = 1; ij ?7MP
public final static int BUBBLE = 2; 'XK 'T\m
public final static int SELECTION = 3; yp#!$+a}
public final static int SHELL = 4; PMfW;%I.
public final static int QUICK = 5; 4yyw:"
public final static int IMPROVED_QUICK = 6; JT?u[pQ^
public final static int MERGE = 7; d=D-s
public final static int IMPROVED_MERGE = 8; k,:W]KD
public final static int HEAP = 9; )2&3D"V
tm+*ik=x|
public static void sort(int[] data) { pey=zR!
sort(data, IMPROVED_QUICK); h} `v0E
} l=E86"m
private static String[] name={ A7%d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lU{)%4e`
}; n9B5D:.G
+V4)><
private static Sort[] impl=new Sort[]{ #*o0n>O
new InsertSort(), QTy=VLk43
new BubbleSort(), <T}^:2G|
new SelectionSort(), WC#6(H5t$
new ShellSort(), Y4rxnXGw
new QuickSort(), vGkemJ^/
new ImprovedQuickSort(), w:5?ofC
new MergeSort(), aJ'Fn
new ImprovedMergeSort(), 32wtN8kx
new HeapSort() #AJW-+1g.=
}; =I# pXL
YnEyL2SuU
public static String toString(int algorithm){ 'H530Y\
return name[algorithm-1]; |0n )U(
} 6 9>@0P
g(@F`W[
public static void sort(int[] data, int algorithm) { h.edb6
impl[algorithm-1].sort(data); TTXF r
} w?ugZYwX*
NM{)liP ;8
public static interface Sort { _4by3?<c
public void sort(int[] data); J :O!4gI
} cYA:k
e$[O J<t
public static void swap(int[] data, int i, int j) { S2$66xr#
int temp = data; {KG}m'lx
data = data[j]; +F)EGB%LXs
data[j] = temp; GW AT0
} Ui'v' $
} t]h_w7!U