[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; 9e^HTUFbG
} 8z,i/:
int i1=l; t\YN\`XD
int i2=mid+1; MZ" yjQA
for(int cur=l;cur<=r;cur++){ 7+^9"k7
if(i1==mid+1) XP#j9CF#.
data[cur]=temp[i2++]; g )H>Uu5@
else if(i2>r) 1O" Mo
data[cur]=temp[i1++]; ERSo&8
else if(temp[i1] data[cur]=temp[i1++]; 8Q $fXB
else \;w$"@9
data[cur]=temp[i2++]; q:Lw!'Zh
} %4X#|22n
} }9Yd[`
N6CWEIJ
} ];@"-H
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改进后的归并排序: G)qNu}
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package org.rut.util.algorithm.support; WH`E=p^x4
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import org.rut.util.algorithm.SortUtil; L`"PaIMz
&{#4^.Q
/** WxNPAJ6YH
* @author treeroot K(*QhKX
* @since 2006-2-2 <hG=0Zcr
* @version 1.0 Q_p!;3
*/ Ie3 F
public class ImprovedMergeSort implements SortUtil.Sort { $L|YllD%
\5g7_3,3W
private static final int THRESHOLD = 10; OyTEd5\3
SSi-Z
/* HS1Gy/6'
* (non-Javadoc) }(}+I}&~
* q2qbbQ6H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \U^0E> d
*/ ^1d"Rqtv
public void sort(int[] data) { >3R%GNw
int[] temp=new int[data.length]; 1PwqWg-\\
mergeSort(data,temp,0,data.length-1); yc|j]?
} OKDBzl
FcR(uv<
private void mergeSort(int[] data, int[] temp, int l, int r) { >s\j/yM
int i, j, k; eBZ^YY<*g
int mid = (l + r) / 2; &?.k-:iN
if (l == r) UNc!6Q-.
return; JN5<=x5r
if ((mid - l) >= THRESHOLD) JXR_klx
mergeSort(data, temp, l, mid); 99T_y`df
else n}8J-/(|+
insertSort(data, l, mid - l + 1); MGUzvSf
if ((r - mid) > THRESHOLD) /mELnJ^
mergeSort(data, temp, mid + 1, r); 8"2 Y$*)(
else >eHSbQu/Bu
insertSort(data, mid + 1, r - mid); c*+yJNm3>
I+ZK \?Rs
for (i = l; i <= mid; i++) { MMs#Y1dH
temp = data; kNX"Vo]1
} <|= UrG
for (j = 1; j <= r - mid; j++) { 5l"EQ9
temp[r - j + 1] = data[j + mid]; d8 1u
} $4yv)6G
int a = temp[l]; h-rPLU;Bw
int b = temp[r]; 0Xmp)_vba
for (i = l, j = r, k = l; k <= r; k++) { *&VH!K#@{
if (a < b) { chjXsq#Q^
data[k] = temp[i++]; mmC&xZ5f
a = temp; _C`cO
} else { /I2RU2|B
data[k] = temp[j--]; }{Y)[w#R
b = temp[j]; ?b?`(JTR
} cnm&oC 6
} !mFx= +
} )+]8T6~ N
; z_ZZ(W
/** lWj|7
* @param data CJA5w[m
* @param l x\qS|q\N
* @param i odxsF(Q0p
*/ KjR^6v
private void insertSort(int[] data, int start, int len) { b2;+a(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !,}W|(P)
} -uZ bVd
} ZKKz?reM'
} 8y;W+I(71
} %GUu{n<6
b&.j>=
堆排序： 9z9z:PU
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package org.rut.util.algorithm.support; 0RY{y n3
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import org.rut.util.algorithm.SortUtil; 9g3J{pKcZ
2.)@u~^Q
/** k$</7IuH
* @author treeroot +W+O7SK\y
* @since 2006-2-2 j I
* @version 1.0 *ayn<Vlh`^
*/ fu|N{$h%X
public class HeapSort implements SortUtil.Sort{ 2kV[A92s
n`";ctQT
/* (non-Javadoc) $ JI`&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l1^/Q~u
*/ '0g1v7Gx
public void sort(int[] data) { loVUB'OSv
MaxHeap h=new MaxHeap(); `{fqnNJE
h.init(data); G1MuH%4
for(int i=0;i h.remove(); 0'!v-`.
System.arraycopy(h.queue,1,data,0,data.length); *z4n2"<l
} O/\L0\T
1Sox@Ko
private static class MaxHeap{ BcaMeb-Z
uG2(NwOL
void init(int[] data){ xz#;F ,`ZR
this.queue=new int[data.length+1]; wH1E7LY|R
for(int i=0;i queue[++size]=data; Q!/<=95E
fixUp(size); Gv[W)+3f
} c;_GZ}8
} 9`}Wp2
GF5WR e(E
private int size=0; 6U;pYWht
(g,lDU[=
private int[] queue; ^,zE Nqg7
Mw!?2G[|
public int get() { }J .f 5WaG
return queue[1]; J{' u
} 2V(ye9
9v)p0
public void remove() { D+{h@^C9Z
SortUtil.swap(queue,1,size--); lJ@2N$w
fixDown(1); xkR--/f
} /km^IH
file://fixdown "~x\bSY
private void fixDown(int k) { 9 O| "Ws>{
int j; kzr9-$eb
while ((j = k << 1) <= size) { :)}iWKAse
if (j < size %26amp;%26amp; queue[j] j++; u2K{3+r`'
if (queue[k]>queue[j]) file://不用交换 k$kq|
break; ]g-(|X~>
SortUtil.swap(queue,j,k); KquHc-fzqr
k = j; sKIWr{D
} tr"iluwGc
} @K36?d]e
private void fixUp(int k) { kRNr`yfN
while (k > 1) { &,+G}
int j = k >> 1; CYrVP%xRA
if (queue[j]>queue[k]) `),7*gn*)
break; h!56?4,%Y
SortUtil.swap(queue,j,k); d{&+xl^ll
k = j; bTZ/$7pp9
} ju8tNL,J
} G T#hqt'1x
pI7\]e
} fI[tU(x
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} dluNA(Xc-
'-3AWBWI1
SortUtil： :FwXoJc_+5
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package org.rut.util.algorithm; )hK5_]"lmj
c#nFm&}dm
import org.rut.util.algorithm.support.BubbleSort; O_0|Q@
import org.rut.util.algorithm.support.HeapSort; dgpo4'c}
import org.rut.util.algorithm.support.ImprovedMergeSort; 5%(J+d
import org.rut.util.algorithm.support.ImprovedQuickSort; mbv\Gn#>
import org.rut.util.algorithm.support.InsertSort; DbJ:KQ!*
import org.rut.util.algorithm.support.MergeSort; S%uH*&`
import org.rut.util.algorithm.support.QuickSort; _z\oDd`'
import org.rut.util.algorithm.support.SelectionSort; 1i#uKKwE
import org.rut.util.algorithm.support.ShellSort; 62rTGbDbx
xksQMS2#
/** AuUT 'E@E
* @author treeroot g 'c4&Do
* @since 2006-2-2 '|&}rLr:+
* @version 1.0 tY !fO>Fn~
*/ hLGUkG?6G
public class SortUtil { >8Zz<S&z
public final static int INSERT = 1; 7&XU]I
public final static int BUBBLE = 2; +mhYr]Z
public final static int SELECTION = 3; meu\jg
public final static int SHELL = 4; J|_&3@r
public final static int QUICK = 5; |vz<FR6
public final static int IMPROVED_QUICK = 6; /XS6X
public final static int MERGE = 7; QKc3Q5)@j
public final static int IMPROVED_MERGE = 8; 9_JK.
public final static int HEAP = 9; !1+L0,I6
[Ua4{3#
public static void sort(int[] data) { GZ/.eYE
sort(data, IMPROVED_QUICK); >WE3$Q>bi
} fF[n?:VV
private static String[] name={ _X;^'mqf~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vi@a87w>
}; (*7edc"F
,,mkB6;
private static Sort[] impl=new Sort[]{ SEXeK2v
new InsertSort(), \.myLkm
new BubbleSort(), )XMSQ ="m
new SelectionSort(), <%hSBDG!x
new ShellSort(), 9X,dV7 yW
new QuickSort(), dm,7OQ
new ImprovedQuickSort(), o4o&}
new MergeSort(), jC ,foqL
new ImprovedMergeSort(), c.m '%4
new HeapSort() {5-4^|!
}; 8wwqV{O7
Un^QNd>
public static String toString(int algorithm){ _ot4HmD
return name[algorithm-1]; wblEx/FqE^
} Ge@./SGT
'?E^\\"*
public static void sort(int[] data, int algorithm) { go m<V?$
impl[algorithm-1].sort(data); *6e`km
} E:4`x_~qQ
B@HW@j
public static interface Sort { Fj"gCBaR
public void sort(int[] data); :g2?)Er-
} 5xwztcR-
@}!1Uk3ud
public static void swap(int[] data, int i, int j) { SWUHHl
int temp = data; T.d+@ZV<#
data = data[j]; m;WUp{'
data[j] = temp; ]G1{@r)
} C16MzrB}(N
} I7 pxi$8f