[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; _iJ8*v8A
} BIBBp=+
int i1=l; ]r|nz~Aa$
int i2=mid+1; i`FskEoijq
for(int cur=l;cur<=r;cur++){ C78V/{
if(i1==mid+1) ]TE,N$X
data[cur]=temp[i2++]; >=T\=y
else if(i2>r) w7(jSPB
data[cur]=temp[i1++]; X\Y:9^5
else if(temp[i1] data[cur]=temp[i1++]; S)$)AN<O
else da'7* &/
data[cur]=temp[i2++]; Tlz $LI
} m(B,a,g<
} A6D@#(D
m(CbMu
} =b{!p|
D^G5$hi
改进后的归并排序: `egyk)"aM
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package org.rut.util.algorithm.support; I3#h
ggy 7p44
import org.rut.util.algorithm.SortUtil; ug|'}\LY
jkN-(v(T
/** Ah_Ttj
* @author treeroot T|/B}srm
* @since 2006-2-2 l'K3)yQEJ
* @version 1.0 !9n!:"(r
*/ :~% zX*
public class ImprovedMergeSort implements SortUtil.Sort { cNd;qO0$
l6AG!8H
private static final int THRESHOLD = 10; 0cpI2
.5t|FJ]`$
/* U#7moS'r
* (non-Javadoc) NIzxSGk|
* "F$0NYb]I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OLl?1
*/ XW^Sw;[efZ
public void sort(int[] data) { hv6w=?7
int[] temp=new int[data.length]; q%RPAe
mergeSort(data,temp,0,data.length-1); !6d6b@Mv
} U,Duq^l~s
M.[A%_|P
private void mergeSort(int[] data, int[] temp, int l, int r) { |, Lp1
int i, j, k; RH"&B`
int mid = (l + r) / 2; 7p!w(N?s
if (l == r) !Q0aKkMfL
return; f:).wi Ld
if ((mid - l) >= THRESHOLD) <f')]
mergeSort(data, temp, l, mid); ?puZqVu5
else h|DKD.
insertSort(data, l, mid - l + 1); f"wm]Q59
if ((r - mid) > THRESHOLD) n*HRGJ
mergeSort(data, temp, mid + 1, r); qM|-2Zl!+
else HoFFce7o
insertSort(data, mid + 1, r - mid); Za&.sg3RG
//ZYN2lT4
for (i = l; i <= mid; i++) { */kX|Sur
temp = data; 2u> [[U1:
} 5GwXZ;(G
for (j = 1; j <= r - mid; j++) { |PI]v`[
temp[r - j + 1] = data[j + mid]; ]Q%|69H}B
} IO(Y_7
int a = temp[l]; ;M95A
int b = temp[r]; |.s#m^"
for (i = l, j = r, k = l; k <= r; k++) { 1e0O-aT#Q
if (a < b) { =36e&z-#
data[k] = temp[i++]; S!/N lSr<
a = temp; :=0XT`iY
} else { :*{>=BD
data[k] = temp[j--]; F$;vPAxbK"
b = temp[j]; lF=l|.c
} "DW; 6<m
} 6]#\|lds1
} I>]t% YKj
azUEp8`|
/** xyoh B#'W
* @param data Ix"hl0Kh
* @param l _>/T<Db
* @param i T%Vg0Y)P;
*/ w84 ]s%y
private void insertSort(int[] data, int start, int len) { CD]2a@j{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ic"n*SZa
} R/yOy^<
} 7Y8B \B)w
} V!'N:je
} 3,snx4q (
f[@M
堆排序： :\0q\2e[<
) OqQz7'
package org.rut.util.algorithm.support; . k6)
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import org.rut.util.algorithm.SortUtil; ~~.v*C[
/f_c?|
/** NZ\aK}?~!
* @author treeroot ! Z e
* @since 2006-2-2 MuQBn7F{c
* @version 1.0 )8c`o
*/ -jZP&8dPH
public class HeapSort implements SortUtil.Sort{ =jik33QV<
m_%1IJ
/* (non-Javadoc) ^J8sR4p#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (3RU|4Ks
*/ J,s)Fu\j@
public void sort(int[] data) { I5"ew=x#
MaxHeap h=new MaxHeap(); 1MtvnPY
h.init(data); iL-I#"qT,
for(int i=0;i h.remove(); ~3{C&c
System.arraycopy(h.queue,1,data,0,data.length); s$Il;
} O<R6^0B42
,w.`(?I/
private static class MaxHeap{ Z\=].[,w4
Nxu10
void init(int[] data){ _tfZg /+)
this.queue=new int[data.length+1]; )x.}B4z
for(int i=0;i queue[++size]=data; t)o #!)|
fixUp(size); @:@0}]%z9
} z8bDBoD6
} hFw\uETu
R v9?<]
private int size=0; K\&A}R
]McLace&
private int[] queue; >4a@rT/
NyD[9R?
public int get() { 9l+`O0.@
return queue[1]; Y&xmy|O#
} M/5e4b
UA[2R1}d
public void remove() { <^,w,A
SortUtil.swap(queue,1,size--); j380=?7
fixDown(1); pmyHto"
} 9&}`.Py
file://fixdown lgZ3=h
private void fixDown(int k) { yhe$A<Rl=
int j; b .k J&c
while ((j = k << 1) <= size) { rE"`q1b#
if (j < size %26amp;%26amp; queue[j] j++; =:aH2T*
if (queue[k]>queue[j]) file://不用交换 S .rT5A[
break; -6MgC9]
SortUtil.swap(queue,j,k); OpY2Z7_
k = j; -@%*~^~z'
} 59";{"sw
} GZ\;M6{oh
private void fixUp(int k) { o)KF+[^
while (k > 1) { BQv+9(:fQB
int j = k >> 1; vV1F|
if (queue[j]>queue[k]) bD<[OerG
break; 2%N$Y]
SortUtil.swap(queue,j,k); 3ik
k = j; Vb06z3"r
} ^Sx0t
} @D8c-`LC"*
!*.mcIQT
} s bd;Kn
-UkP{x)S
} ^jb55X}
} ab@Nd$
SortUtil： `CW8Wj
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package org.rut.util.algorithm; Mn$TWhg'
,St#/tu
import org.rut.util.algorithm.support.BubbleSort; #EAP<h
import org.rut.util.algorithm.support.HeapSort; .pQH>;k]K
import org.rut.util.algorithm.support.ImprovedMergeSort; 6 k+FTDL
import org.rut.util.algorithm.support.ImprovedQuickSort; Z}.N4 /
import org.rut.util.algorithm.support.InsertSort; ]y@8mb&
import org.rut.util.algorithm.support.MergeSort; zu<b#Wv
import org.rut.util.algorithm.support.QuickSort; Wm4@+}
import org.rut.util.algorithm.support.SelectionSort; WV!qG6\W
import org.rut.util.algorithm.support.ShellSort; $6h:j#{JE
|\2zw _o
/** "T@9]>6.f
* @author treeroot ]uX'[Z}t
* @since 2006-2-2 w"$CV@AJ
* @version 1.0 rH8^Fl&jT
*/ t>f<4~%MJ
public class SortUtil { xn1
public final static int INSERT = 1; U 9TEC)
public final static int BUBBLE = 2; C_=! ( @`8
public final static int SELECTION = 3; -EFtk\/
public final static int SHELL = 4; v9INZ1# v
public final static int QUICK = 5; K>6#MI
public final static int IMPROVED_QUICK = 6; Rtw^ lo
public final static int MERGE = 7; !p4w 8
public final static int IMPROVED_MERGE = 8; br+{23&1R#
public final static int HEAP = 9; Q+)fI
w-};\]I
public static void sort(int[] data) { Ra<mdteZT
sort(data, IMPROVED_QUICK); XP *pYN
} r^-3( 77n
private static String[] name={ ?JDZDPVJ)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JLm0[1Lzd
}; 9+U%k(9
bwUsE U 0
private static Sort[] impl=new Sort[]{ FiJJe
new InsertSort(), )`yxJ;O@$
new BubbleSort(), o!^':mll
new SelectionSort(), c 6@!?8J
new ShellSort(), lb5Y$ZC
new QuickSort(), rc1EJ(c
new ImprovedQuickSort(), ]h~=lItTRZ
new MergeSort(), mza1Q~<
new ImprovedMergeSort(), YOwo\'|=
new HeapSort() +"6_rbeuO
}; zI8Q "b
."l@aE=|
public static String toString(int algorithm){ }"wWSPD
return name[algorithm-1]; _C~e(/=z
} ~{iBm"4
(h7 rW3
public static void sort(int[] data, int algorithm) { YW9 [^
impl[algorithm-1].sort(data); 3]WIN_h
} 'm}K$h(U
4_3Jpz*
public static interface Sort { 'x{g P?.
public void sort(int[] data); R8P7JY[h
} I0P)DR
:,%~rR
public static void swap(int[] data, int i, int j) { D oX!P|*
int temp = data; b>=MG8
data = data[j]; DxR__
data[j] = temp; xu(5U`K
} ))|Wm}
} ^;@q^b)ZP