[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; DcL;7IT
} suP/I?4'@
int i1=l; u^Sa{Jk=
int i2=mid+1; qe{:9
for(int cur=l;cur<=r;cur++){ |}Wm,J
if(i1==mid+1) B(TE?[ #
data[cur]=temp[i2++]; #2qDn^s
else if(i2>r) oYn|>`+6:y
data[cur]=temp[i1++]; Kk?C
else if(temp[i1] data[cur]=temp[i1++]; ;('(Yn7~
else \sZT[42
data[cur]=temp[i2++]; +M^+qt;]V
} 3+>;$
} +J<igb!S
>/5'0n_R
} 6Yu&'[?H$
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改进后的归并排序: #'&&&_Hu3
eNEMyv5{w4
package org.rut.util.algorithm.support; 1U(P0$C
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import org.rut.util.algorithm.SortUtil; 1x8zub B
"0ZBPp1q
/** -h?ed'e/zz
* @author treeroot 6b6rM%B.oD
* @since 2006-2-2 EFqYEDXW
* @version 1.0 )W1tBi
*/ D`e6#1DbJ
public class ImprovedMergeSort implements SortUtil.Sort { Svun RUE-f
Ga M:/.
private static final int THRESHOLD = 10; R@[gkj
Q?uHdmY*X
/* C@#KZ`c)
* (non-Javadoc) N!#0O.6
* aI'MVKwMk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TyG;BF|rwk
*/ Y_SB3 $])
public void sort(int[] data) { }Jr!aM'
int[] temp=new int[data.length]; v:7_ZD6kR
mergeSort(data,temp,0,data.length-1); aViZKps`m
} (SnrYO`#
$9%UAqk9
private void mergeSort(int[] data, int[] temp, int l, int r) { @cC@(M~Ru
int i, j, k; 9H6%\#rw
int mid = (l + r) / 2; 6hX[5?}
if (l == r) {/E_l
return; CqkY_z
if ((mid - l) >= THRESHOLD) "1iLfQ
mergeSort(data, temp, l, mid); a2!;$B%
else P1>?crw
insertSort(data, l, mid - l + 1); #vs=yR/tn{
if ((r - mid) > THRESHOLD) 1@"os[9
mergeSort(data, temp, mid + 1, r); qwomc28O
else OoqA`%
insertSort(data, mid + 1, r - mid); u4QBD5T"
(aTpBXGr=
for (i = l; i <= mid; i++) { XK=-$2n
temp = data; EjDr
} ?Tr\r1s]
for (j = 1; j <= r - mid; j++) { /ho7O/aAa
temp[r - j + 1] = data[j + mid]; YM<F7tp4
} fUV;3du
int a = temp[l]; 4Y `=`{Q
int b = temp[r]; W#sCvI@
for (i = l, j = r, k = l; k <= r; k++) { ["7]EW\!:
if (a < b) { Vu1swq)l
data[k] = temp[i++]; cI/Puh^3
a = temp; L2}p<?f
} else { tB/'3#o
data[k] = temp[j--]; g* DBW,
b = temp[j]; ;cD&qheDV
} 9tBE=L=
} FesUE_L2$
} 5kdh!qy[$,
OZn40"`
/** sOb=+u$$9
* @param data K^f&+`v6_
* @param l >V|KS(}s
* @param i yD:}&!\}
*/ ?j|i|WUD
private void insertSort(int[] data, int start, int len) { @?CEi#-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0Ma3
} KnxK9
} ,%4~ulKMn
} W)p?cK`
} <4,LTB]9-
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堆排序： -kkpEw\
*h4x`luJ
package org.rut.util.algorithm.support; ibL
aYrbB#
import org.rut.util.algorithm.SortUtil; M%"{OHj!o
>#EOCo
/** (_Ky'.
* @author treeroot e{E8_2d
* @since 2006-2-2 7?W1i{(
* @version 1.0 E;-*LT&{
*/ Qf.]Mw?Bm
public class HeapSort implements SortUtil.Sort{ JGG(mrvR
rGUu K0L&
/* (non-Javadoc) (y!V0iy]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :=e"D;5
*/ {No Y`j5S
public void sort(int[] data) { G^&P'*
MaxHeap h=new MaxHeap(); Q1^kU0M}
h.init(data); kH">(f
for(int i=0;i h.remove(); 4ZCD@C
System.arraycopy(h.queue,1,data,0,data.length); t~kh?u].j
} Q~zs]{\
TS49{^d$
private static class MaxHeap{ ck\TTNA
CA]u3bf~
void init(int[] data){ b<\aJb{2
this.queue=new int[data.length+1]; tr@)zM GB
for(int i=0;i queue[++size]=data; 'v0(ki#
fixUp(size); [Nv)37|W
} (Q[(]dfc
} *RJiHcII
vTq [Xe"
private int size=0; UJ7{FN=@t
~fY\;
private int[] queue; +V9<ug6T
-W.bOr
public int get() { 6S&OE k
return queue[1]; 3F?_{A
} q"$C)o
rq![a};~
public void remove() { rtC:3fDy
SortUtil.swap(queue,1,size--); vu|-}v?:
fixDown(1); Zr|z!S?aSC
} ykD-L^}
file://fixdown o@uZU4MM
private void fixDown(int k) { nXAGwU8a
int j; 6oy[0hj
while ((j = k << 1) <= size) { Hh`HMa'q
if (j < size %26amp;%26amp; queue[j] j++; C8AR^FW
if (queue[k]>queue[j]) file://不用交换 wOn*QO[
break; V#TNv0&0
SortUtil.swap(queue,j,k); W-<`Vo'
k = j; Rgb&EnVW
} nUScDb2|
} Zy=DY
private void fixUp(int k) { Uc( z|
while (k > 1) { 0;tu}]jnN
int j = k >> 1; rp,Us#>6
if (queue[j]>queue[k]) w-P;E!gTt
break; r;@"s g
SortUtil.swap(queue,j,k); j|%>NB ):
k = j; g>;"Fymc'
} f6`W(OiE
} ;"JgNad
Z.,pcnaQb
} pMV?vH
P#-p*4
} 349BQ5ND
Yd]
SortUtil： }#phNn6
hQwUwfoe@
package org.rut.util.algorithm; p Cgm!t?/
jKb4d9aX
import org.rut.util.algorithm.support.BubbleSort; F0ylJ /E
import org.rut.util.algorithm.support.HeapSort; 2[i(XG{/
import org.rut.util.algorithm.support.ImprovedMergeSort; g"v6UZ\
import org.rut.util.algorithm.support.ImprovedQuickSort; 58t~? 2E
import org.rut.util.algorithm.support.InsertSort; tY%T
import org.rut.util.algorithm.support.MergeSort; 2Ws'3Jz
import org.rut.util.algorithm.support.QuickSort; &Xh=bM'/%m
import org.rut.util.algorithm.support.SelectionSort; DWupLJpk;c
import org.rut.util.algorithm.support.ShellSort; C=(~[Y
't+'rG6x
/** `$XgfMBf |
* @author treeroot t|C?=:_
* @since 2006-2-2 >OKc\m2%Q
* @version 1.0 >%A~ :
*/ pER[^LH_)
public class SortUtil { ?;GXFKy
public final static int INSERT = 1; YM#J_sy@J.
public final static int BUBBLE = 2; |y&vMx~t
public final static int SELECTION = 3; 0Ok[`r`
public final static int SHELL = 4; 'j;i4ie>*x
public final static int QUICK = 5; (5kL6d2
public final static int IMPROVED_QUICK = 6; ~h$ H@&5
public final static int MERGE = 7; nPhREn!
public final static int IMPROVED_MERGE = 8; BC R]K
public final static int HEAP = 9; JPpNCC.b
1rV9dM#F
public static void sort(int[] data) { Tsocc5gWZ*
sort(data, IMPROVED_QUICK); WS"v"J%
} d?><+!a
private static String[] name={ `HILsU=|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;}'Z2gZB
}; d>wG6Z,|
'y7<!uo?
private static Sort[] impl=new Sort[]{ uFL!*#A
new InsertSort(), 4KY@y?H g
new BubbleSort(), (I;lE*>
new SelectionSort(), 5uU{!JuSa
new ShellSort(), 0>:`|IGnT2
new QuickSort(), :Yn{:%p
new ImprovedQuickSort(), g_?bWm4br
new MergeSort(), CJ[e^K{
new ImprovedMergeSort(), EGjzjuJu{
new HeapSort() 02C;
}; :|Bzbn=N2
'grb@+w(
public static String toString(int algorithm){ /Q'O]h0a
return name[algorithm-1]; vqo ~?9z[e
} 4Yd$RP
a KIS%M#Y
public static void sort(int[] data, int algorithm) { XQcE ZJ2
impl[algorithm-1].sort(data); #!4`t]E<
} =6BI[_0
^?T,>ZI
public static interface Sort { 1wW4bg 5
public void sort(int[] data); c}w[T
} d{DBG}/Yg
x)T07,3:
public static void swap(int[] data, int i, int j) { U!T#'H5'-
int temp = data; 6+Y@dJnPT
data = data[j]; EI@ep~
data[j] = temp; :U-yO 9!j
} cd$,,
} to)Pl}9QkK