[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; >?H_A
} <6~/sa4GN
int i1=l; A{xSbbDk
int i2=mid+1; !.x=r
for(int cur=l;cur<=r;cur++){ O%rS;o
if(i1==mid+1) :==UDVP
data[cur]=temp[i2++]; LX&=uv%-^
else if(i2>r) !H2C9l:rd
data[cur]=temp[i1++]; '5&B~ 1&
else if(temp[i1] data[cur]=temp[i1++]; &Z#Vw.7U
else 8Xt=eL/P
data[cur]=temp[i2++]; "i;*\+x
} &e5^v
} "Wzij&WkQ
Z3&XTsq
} F>hVrUD8
vLVSZX
改进后的归并排序: Ktj(&/~}
3/]f4D{MMY
package org.rut.util.algorithm.support; -K{\S2
#l8K8GLuf
import org.rut.util.algorithm.SortUtil; ;tZ}i4Ud
F5b]/;|
/** p1[WGeV
* @author treeroot f)!{y>Q
* @since 2006-2-2 &q kl*#]
* @version 1.0 wpPxEp/
*/ c/,|[t
public class ImprovedMergeSort implements SortUtil.Sort { >rQ)|W=i
[C*Xk{e
private static final int THRESHOLD = 10; ~cWLu5
Pj^k pjV
/* ]}*G[[ ^p
* (non-Javadoc) +LvZ87O^~
* SV$ASs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XF0*d~4
*/ >QbI)if`1
public void sort(int[] data) { |wl")|b%
int[] temp=new int[data.length]; |2+c DR
mergeSort(data,temp,0,data.length-1); lUm}nsp=X
} lW@:q04Z$
IWSEssP
private void mergeSort(int[] data, int[] temp, int l, int r) { av$\@4I
int i, j, k; #dXZA>b9
int mid = (l + r) / 2; ?L.p9o-S0
if (l == r) #oS
return; -F~9f>
if ((mid - l) >= THRESHOLD) Q'vIeG"o
mergeSort(data, temp, l, mid); eFeCS{LV+
else J@&$U7t
insertSort(data, l, mid - l + 1); "@):*3 4
if ((r - mid) > THRESHOLD) @5POgQ8
mergeSort(data, temp, mid + 1, r); [K^q:3R
else B@:XC&R^
insertSort(data, mid + 1, r - mid); `jl. f
y[Fw>g1`q
for (i = l; i <= mid; i++) { X]f#w
temp = data; k/6Gj}l'o
} FL*w(Br.
for (j = 1; j <= r - mid; j++) { uvAy#,
temp[r - j + 1] = data[j + mid]; QyBK*uNdV
} 9=sMKc%!-
int a = temp[l]; lqwJ F &
int b = temp[r]; ~S~x@&yR
for (i = l, j = r, k = l; k <= r; k++) { iKCTYXN1(
if (a < b) { +=lcN~U2
data[k] = temp[i++]; RaJ}>e
a = temp; FkkZyCqZ`
} else { #6#BSZ E
data[k] = temp[j--]; #gr+%=S'6C
b = temp[j]; m/"=5*pA
} &dHm!b
} M`f;-
} %)!~t8To
RI<Yg#
/** ~P.-3
* @param data 4h0jX9
* @param l m0q`A5!)
* @param i qhHRR/p
*/ ag*Hs<gi
private void insertSort(int[] data, int start, int len) { Toa#>Z*+Rb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0DP%44Cv9
} Aghj)V
} f1,$<Y|qU
} _yXeX
} rSFXchD/
mU0r"\**c3
堆排序： Ny&Fjzl
%.Q2r ?j
package org.rut.util.algorithm.support; sfBjA
t.i9!'Y ]
import org.rut.util.algorithm.SortUtil; [n@!=T
=<27qj
/** ?5+KHG*)
* @author treeroot 7Q4PjcD
* @since 2006-2-2 F<'l'AsC-
* @version 1.0 M#gGD-
*/ `E1_S
public class HeapSort implements SortUtil.Sort{ "Z1&z-
I}CA-8
/* (non-Javadoc) 0jx~_zq-j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fgz'C?
*/ uvc{RP
public void sort(int[] data) { <38@b ]+
MaxHeap h=new MaxHeap(); vdX~E97
h.init(data); D_;n4<|.
for(int i=0;i h.remove(); ]> "/<"
System.arraycopy(h.queue,1,data,0,data.length); kl<B*:RqH
} jgfP|oD
"rlSK >`
private static class MaxHeap{ }R] }@i~i
JV*,!5
void init(int[] data){ lDM~Z3(/b
this.queue=new int[data.length+1]; "a_D]D(d5
for(int i=0;i queue[++size]=data; i1H80m s
fixUp(size); QcVtv7+*v
} N[D\@o
} ""KN?qh9
Xcpm?aTo
private int size=0; 6}FDLBA
x@RA1&c
private int[] queue; CjukD%>sde
oL/^[TXjH
public int get() { .mU.eLM
return queue[1]; NGeeD?2~
} rH_:7#.E
uEO2,1+
public void remove() { 8t 35j
SortUtil.swap(queue,1,size--); GP kCgb(
fixDown(1); h[)aRo
} 4 ~|TKd{
file://fixdown ?F), 4Q
private void fixDown(int k) { L5P}%1 _
int j; w0`L)f5v
while ((j = k << 1) <= size) { Pw0KQUs
if (j < size %26amp;%26amp; queue[j] j++; h+d;`7Z>
if (queue[k]>queue[j]) file://不用交换 g.sV$.T2K
break; ^XB8A=xi
SortUtil.swap(queue,j,k); Zkep7L
k = j; ] ,aAzjZ
} x!Y@31!Dy
} Br$PL&e~
private void fixUp(int k) { u! FSXX<
while (k > 1) { )h!l%72
int j = k >> 1; Yt<PKs#E
if (queue[j]>queue[k]) Y>m=cqR
break; 0mi[|~x=
SortUtil.swap(queue,j,k); lTd2~_
k = j; ,^Srd20
} w+(wvNmNEK
} NjyIwo0
PKs%-Uk
} e{+{,g{iu
aw~EK0yU
} qxr&_r
/'_ RI
SortUtil： /6*.%M>r
#\["y%;W
package org.rut.util.algorithm; UN4)>\Y
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import org.rut.util.algorithm.support.BubbleSort; %4KJ&R (>[
import org.rut.util.algorithm.support.HeapSort; e%Xf*64
import org.rut.util.algorithm.support.ImprovedMergeSort; T1di$8
import org.rut.util.algorithm.support.ImprovedQuickSort; EKw\a
import org.rut.util.algorithm.support.InsertSort; ">&:(<
import org.rut.util.algorithm.support.MergeSort; ?i=!UN
import org.rut.util.algorithm.support.QuickSort; <vuX " 8
import org.rut.util.algorithm.support.SelectionSort; ;i?!qB>baX
import org.rut.util.algorithm.support.ShellSort; TRok4uc
`5&V}"lB
/** W)~.o/;
* @author treeroot %$KO]
* @since 2006-2-2 A>2p/iMc
* @version 1.0 JU.%;e7
*/ Bb"4^EOZ,
public class SortUtil { $NRb'
public final static int INSERT = 1; #Kr.!uD
public final static int BUBBLE = 2; E\N=p&g$
public final static int SELECTION = 3; (t['
public final static int SHELL = 4; ,FVy:"FR
public final static int QUICK = 5; W+S; Do
public final static int IMPROVED_QUICK = 6; 0l@+xS;
public final static int MERGE = 7; lM%fgyX
public final static int IMPROVED_MERGE = 8; }]?G"f t K
public final static int HEAP = 9; gQDK?aQX
i?=.; 0[|
public static void sort(int[] data) { rB?cm]G=
sort(data, IMPROVED_QUICK); kweTK]mT
} 6x{IY
private static String[] name={ :J-5Q]#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~B\:
}; * XGBym
e!Okc*,
private static Sort[] impl=new Sort[]{ W-QPO
new InsertSort(), X5<.%@Z
new BubbleSort(), 93DBZqN
new SelectionSort(), B'/ >Ax&
new ShellSort(), 0.0!5D[
new QuickSort(), 1hS~!r'qqv
new ImprovedQuickSort(), x@}Fn:c!5
new MergeSort(), ,O!aRvzap
new ImprovedMergeSort(), EQ$9IaY.
new HeapSort() <]^D({`
}; L:Eb(z/D
PtOnj)Q
public static String toString(int algorithm){ KHN ,SB
return name[algorithm-1]; .Y.# d7TA
} mK4|=Q
p2(_YN;s
public static void sort(int[] data, int algorithm) { LTct0Gh
impl[algorithm-1].sort(data); db~:5#*
} O+j:L
:n9^:srGZH
public static interface Sort { H\bIO!vb
public void sort(int[] data); ~ }22Dvo
} wm71,R1
#wiP{+%b
public static void swap(int[] data, int i, int j) { NvZ?e
int temp = data; =fo/+m5
data = data[j]; gAP}KR#T
data[j] = temp; qQvb;jO
} -rlX<(pl)
} -`EoTXT*U