[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; A=X2zm>9
} 1c=Roiq
int i1=l; M,YlhL
int i2=mid+1; o^59kQT
for(int cur=l;cur<=r;cur++){ -e_+x'uF
if(i1==mid+1) W68d"J%>_
data[cur]=temp[i2++]; !x9j~D'C`
else if(i2>r) %9|=\# G
data[cur]=temp[i1++]; -la~p~8
else if(temp[i1] data[cur]=temp[i1++]; 0`X%&
else K7&A^$`
data[cur]=temp[i2++]; [0GM!3YJ7
} 02]9OnWw
} zT}Qrf~
!=#230Y
} Meh?FW||5
w;$@</
改进后的归并排序: 6p/gvpZ
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package org.rut.util.algorithm.support; ?v2OoNQ
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import org.rut.util.algorithm.SortUtil; %g(h%V9f
.rj FhSr$
/** ;??wLNdf-
* @author treeroot to Ei4u)m
* @since 2006-2-2 vx=I3o
* @version 1.0 9E_C u2B
*/ ~B%EvG7:n
public class ImprovedMergeSort implements SortUtil.Sort { 9d2#=IJm
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private static final int THRESHOLD = 10; {jzN
:=04_5 z
/* x+5Q}ux'G
* (non-Javadoc) 96F:%|yG
* X|L8s$>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (5d~0
*/ 1W;3pN
public void sort(int[] data) { B$7m@|p!
int[] temp=new int[data.length]; =ox#qg.5
mergeSort(data,temp,0,data.length-1); bIizh8d?
} |bDN~c:/
$X5~9s1Wl
private void mergeSort(int[] data, int[] temp, int l, int r) { #ITx[X89|
int i, j, k; vnz.81OR
int mid = (l + r) / 2; 49 3ik
if (l == r) 14\%2nE
return; ]^gD@].
if ((mid - l) >= THRESHOLD) ORa!84L
mergeSort(data, temp, l, mid); k`js~/Xv
else 5S7`gN.
insertSort(data, l, mid - l + 1); U6X~]|o
if ((r - mid) > THRESHOLD) >4\V/ I
mergeSort(data, temp, mid + 1, r); MV$>|^'em
else 6u7(}K
insertSort(data, mid + 1, r - mid); <-Q0WP_^
wRPBJ-C)
for (i = l; i <= mid; i++) { Yx&cnDx
temp = data; nAF@47Wo
} `#fOY$#XB
for (j = 1; j <= r - mid; j++) { $?Aez/
temp[r - j + 1] = data[j + mid]; |[K7oa~#
} = k3O4gE7
int a = temp[l]; bS/`G0!
int b = temp[r]; `1EBnL_1
for (i = l, j = r, k = l; k <= r; k++) { vkq?z~GA
if (a < b) { c7s4 g-
data[k] = temp[i++]; ? z=>n
a = temp; Z55,S=i
} else { <O5;w
data[k] = temp[j--]; 1>%SSQ
b = temp[j]; 8<n8joO0
} 10#!{].#x
} `8FC&%X_
} GJO/']k
iZMsN*9[
/** 1AE/ILGo
* @param data C2<y(GU[Bh
* @param l iqy}|xAU
* @param i Od&M^;BQ
*/ Qlb@Az
private void insertSort(int[] data, int start, int len) { Z$zUy|s[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WP]<\_r2
} {Y/|7Cl0
} v9inBBC q
} CPVKz
} hsqUiB tc6
j%p~.kW5
堆排序： >t D-kzN
'R,d?ikY
package org.rut.util.algorithm.support; =R>Sxaq
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import org.rut.util.algorithm.SortUtil; =rBFMTllM
H<1?<1^
/** 'oT}jI
* @author treeroot 21o_9=[^
* @since 2006-2-2 ,O[vxN1X*
* @version 1.0 EPa3Yb?BGb
*/ (Wx)YI
public class HeapSort implements SortUtil.Sort{ mlVv3mVyR<
]UgAz
/* (non-Javadoc) _O!D*=I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '|d (<.[
*/ ("lcL2Bq
public void sort(int[] data) { %<M<'jxSca
MaxHeap h=new MaxHeap(); }TF<C!]
h.init(data); /ruf1?\,R
for(int i=0;i h.remove(); )K?GAj]Pq
System.arraycopy(h.queue,1,data,0,data.length); <`r+l5
} 9Np0<e3p
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private static class MaxHeap{ *$cp"
T^nX+;:|
void init(int[] data){ l?R_wu,Q
this.queue=new int[data.length+1]; NDg]s2T
for(int i=0;i queue[++size]=data; X~DXx/9
fixUp(size); 4O`h%`M
} w-#0k.T
} SRD&Uf0M
2ga}d5lu
private int size=0; :9`1bZ?a
0sUc6_>e
private int[] queue; rL s6MY
}fCM_w
public int get() { IRU2/Ycg
return queue[1]; |M?HdxPa
} AO]lXa
E^YbyJ=1
public void remove() { 9@1W=sl
SortUtil.swap(queue,1,size--); \1MDCP9:
fixDown(1); \\lC"Z#J`
} t<k8.9 M$
file://fixdown d5=xOEv; :
private void fixDown(int k) { < 5PeI
int j; &7W6IM
while ((j = k << 1) <= size) { {S}@P~H=
if (j < size %26amp;%26amp; queue[j] j++; }M7kApb>Y
if (queue[k]>queue[j]) file://不用交换 NN:TT\!v
break; -Fdi,\e
SortUtil.swap(queue,j,k); RnrM rOh
k = j; %OtW\T=u
} OZ" <V^"`
} :A'!u r=\
private void fixUp(int k) { ks5'Z8X
while (k > 1) { ?c2TT Q
int j = k >> 1; ^pjez+
if (queue[j]>queue[k]) y|dXxd9
break; [o.zar82
SortUtil.swap(queue,j,k); H_j<%VW
k = j; asi1c y\
} p~.@8r(
} PsgzDhRv
#'8PFw\zw
} zEB1Br,
K_5&_P1
} ;Wa{q.)
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SortUtil： a 98
8j'*IRj*q
package org.rut.util.algorithm; 3+-(;>>\
wB)+og-^1f
import org.rut.util.algorithm.support.BubbleSort; XNUqZ-M:
import org.rut.util.algorithm.support.HeapSort; {K:Utdu($q
import org.rut.util.algorithm.support.ImprovedMergeSort; %wf|nnieZ
import org.rut.util.algorithm.support.ImprovedQuickSort; iy]}1((hR
import org.rut.util.algorithm.support.InsertSort; kYB <FwwB
import org.rut.util.algorithm.support.MergeSort; !_9$[Oq~
import org.rut.util.algorithm.support.QuickSort; v-3zav
import org.rut.util.algorithm.support.SelectionSort; lX*;KHT)
import org.rut.util.algorithm.support.ShellSort; V,+[XB
tTGK25&
/** mr!I}I7x&x
* @author treeroot sAoM=n}!
* @since 2006-2-2 ~vGtNMQg
* @version 1.0 NVeRn
*/ L"iyjL<M
public class SortUtil { -;\+uV
public final static int INSERT = 1; pV6HQ:y1
public final static int BUBBLE = 2; p'uz2/g
public final static int SELECTION = 3; xLI{=sL
public final static int SHELL = 4; |{)xC=
public final static int QUICK = 5; ;_/q>DR>,3
public final static int IMPROVED_QUICK = 6; <83gn :$
public final static int MERGE = 7; nV3 7` I
public final static int IMPROVED_MERGE = 8; 4nH91Z9=
public final static int HEAP = 9; 5%+}rSn7
8 tygs
public static void sort(int[] data) { B bw1k
sort(data, IMPROVED_QUICK); RQCQGa^cP
} ^<\} Y
private static String[] name={ =Rx?6%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G}#/`]o!K
}; 2A}uqaF
bH/pa#G(
private static Sort[] impl=new Sort[]{ 2 dD<]
new InsertSort(), P"h\7V,d%
new BubbleSort(), 'UVv(-
new SelectionSort(), :6$4K"^1
new ShellSort(), nRB>[lG
new QuickSort(), 5@D7/$bLp
new ImprovedQuickSort(), As~p1%nok
new MergeSort(), tOg 8L2
new ImprovedMergeSort(), n [Xzo}
new HeapSort() p/1}>F|i
}; Zng` oFD
C^" Hj
public static String toString(int algorithm){ G0QXf
return name[algorithm-1]; < mK
} *:T>~ilF
QHzX 5$IM
public static void sort(int[] data, int algorithm) { [du>ff
impl[algorithm-1].sort(data); abaQJ|
} >?9 WeXG
W,/C?qFp
public static interface Sort { PyT}}UKj:
public void sort(int[] data); kE_@5t7O{
} g<iwxF
12d}#G<q-
public static void swap(int[] data, int i, int j) { cCh5Jl@Z
int temp = data; ah/6;,T
data = data[j]; nG^M 2)(8
data[j] = temp; d0A\#H_&
} ]v@tZ}
} 9{%g-u\