[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; v5dLjy5
} V3q[#.o
int i1=l; > ,;<Bz|X
int i2=mid+1; ^~K[bFbW
for(int cur=l;cur<=r;cur++){ j-9Zzgr
if(i1==mid+1) sG8G}f
data[cur]=temp[i2++]; pT'jX^BU
else if(i2>r) OO*2>Qy~z
data[cur]=temp[i1++]; $#/f+kble
else if(temp[i1] data[cur]=temp[i1++]; ^s_7-p])(
else T1WH
data[cur]=temp[i2++]; %2^wyVkq:
} ?OF9{$m3?
} =U,mzY(
yrQfPR
} s0*@zn>h
eq,`T;
改进后的归并排序: #9CLIYJAd
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package org.rut.util.algorithm.support; h@%a+6b?
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import org.rut.util.algorithm.SortUtil; @~8*
'ocPG.PaU
/** = ow=3Ku
* @author treeroot vXT>Dc2\!
* @since 2006-2-2 3V%ts7:a
* @version 1.0 |VQmB/a
*/ SkyX\&
public class ImprovedMergeSort implements SortUtil.Sort { hD9b2KZv
SaSj9\o
private static final int THRESHOLD = 10; "r[Ob]/
,v_NrX=f?
/* )>I-j$%=2
* (non-Javadoc) W.Z`kH *B
* U6F1QLSLz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cxra(!&
*/ "?ON0u9
public void sort(int[] data) { 5%RiM|+
int[] temp=new int[data.length]; z4{:X Da
mergeSort(data,temp,0,data.length-1); 5]~451
} oMHTB!A=2
~Aw.=Yi=
private void mergeSort(int[] data, int[] temp, int l, int r) { OZ,Xu&N
int i, j, k; AA<QI'6
int mid = (l + r) / 2; JasA w7
if (l == r) .X34[AXd
return; ;"|QW?>$D
if ((mid - l) >= THRESHOLD) -rlCE-S
mergeSort(data, temp, l, mid); C1o^$Q|j
else 9nSfFGu
insertSort(data, l, mid - l + 1); Cf>(,rt};
if ((r - mid) > THRESHOLD) vp(ow]Q
mergeSort(data, temp, mid + 1, r); -{A*`.[v
else _BZ6Ws$C2
insertSort(data, mid + 1, r - mid); b)@rp
q![`3m-d.
for (i = l; i <= mid; i++) { |dhKeg_
temp = data; Ui.S)\B
} uR6 `@F
for (j = 1; j <= r - mid; j++) { bX>R9i$
temp[r - j + 1] = data[j + mid]; Z}S7%m
} w|c200Is}e
int a = temp[l]; G_<4% HM
int b = temp[r]; F}?4h Dt
for (i = l, j = r, k = l; k <= r; k++) { 7=gcdfW,;x
if (a < b) { xJ9aFpTC
data[k] = temp[i++]; t~|J2*9l
a = temp; Raf(m,o(
} else { 3,-[lG@o
data[k] = temp[j--]; u9fJ:a
b = temp[j]; @Gt.J*!s/
} ?AK`M #M
} /xj`'8
} e~7FK_y#0
8Qhj_
/** d,toUI
* @param data o59b#9
* @param l N(V_P[]"*,
* @param i %OOkPda
*/ ERia5HnoD,
private void insertSort(int[] data, int start, int len) { RL3*fRlb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zl(o/n
} 3&mpn,
} <cU%yA710
} hZlHY9[t?
} B<i(Y1n[
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堆排序： ,3N>`]Km'
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package org.rut.util.algorithm.support; L9-Jwy2(>
p=odyf1hK
import org.rut.util.algorithm.SortUtil; o(4gh1b%
/l_u $"
/** -K3d u&j
* @author treeroot "$pbK:
* @since 2006-2-2 u`D _
* @version 1.0 4}s'xMT!
*/ .+kg1=s
public class HeapSort implements SortUtil.Sort{ S`$%C=a.
x-]:g&5T
/* (non-Javadoc) t+_\^Oa)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <ZheWl
*/ hz*T"HJ]t
public void sort(int[] data) { lv9Tq5C
MaxHeap h=new MaxHeap(); JOJuGB-d
h.init(data); fp*6Dv_
for(int i=0;i h.remove(); T<"Bb[kH
System.arraycopy(h.queue,1,data,0,data.length); 1\~I "$}
} Va?i#<a
ZZ Hjv
private static class MaxHeap{ +3J<vM}dy
}0tHzw=#%e
void init(int[] data){ 4.^T~n G
this.queue=new int[data.length+1]; #:By/9}-
for(int i=0;i queue[++size]=data; 6VVxpDAi:
fixUp(size); mPHto-=fB
} TgaxZW
} .$7RF!p
]YtN6Rq/
private int size=0; ]tf`[bINP
OGIv".~s4
private int[] queue; x;<0Gg~jB
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public int get() { 3&CV!+z
return queue[1]; :;eQ*{ `\
} WMC\J(@.
T0Xm}i
public void remove() { ;i\N!T{>
SortUtil.swap(queue,1,size--); /(*Ucv2i}T
fixDown(1); Wy}^5]R0E
} 3E^qh03(
file://fixdown }79O[&
private void fixDown(int k) { AO>b\,0Me
int j; U[02$gd0l
while ((j = k << 1) <= size) { TA0(U$ 4
if (j < size %26amp;%26amp; queue[j] j++; A]TEs)#*7)
if (queue[k]>queue[j]) file://不用交换 V?1[R
break; =yz"xWH
SortUtil.swap(queue,j,k); #:+F
k = j; df$.gP
} w%s];EE
} :L@n(buRN
private void fixUp(int k) { tcT=a@
while (k > 1) { '(rD8 pc
int j = k >> 1; r{^43g?
if (queue[j]>queue[k]) CgmAxcK
break; a6j& po
SortUtil.swap(queue,j,k); b>VV/j4!/
k = j; ]J'TebP=L5
} =Y81h-
} *asv^aFpS
iiQ q112`
} ?&;_>0P
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} C\;l)h_{
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SortUtil： icIn>i<m
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package org.rut.util.algorithm; >h)kbsSU0z
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import org.rut.util.algorithm.support.BubbleSort; f)j*P<V
import org.rut.util.algorithm.support.HeapSort; '/NpmNY:L
import org.rut.util.algorithm.support.ImprovedMergeSort; ~abyjM
import org.rut.util.algorithm.support.ImprovedQuickSort; X=KW >
import org.rut.util.algorithm.support.InsertSort; ^)?Wm,{"w
import org.rut.util.algorithm.support.MergeSort; Te L&6F$
import org.rut.util.algorithm.support.QuickSort; 1P(=0\P>&
import org.rut.util.algorithm.support.SelectionSort; @B(oq1i@
import org.rut.util.algorithm.support.ShellSort; 8T9s:/%
Bh'fkW3
/** @,GL&$Y:W
* @author treeroot \Q(a`6U
* @since 2006-2-2 Lv]%P.=[G
* @version 1.0 lYCvYe
*/ 7)V"E-6h
public class SortUtil { 'I&0$<
public final static int INSERT = 1; F5RL+rU(h
public final static int BUBBLE = 2; T>'O[=UWh
public final static int SELECTION = 3; ,wes*
public final static int SHELL = 4; _wK.n.,S~
public final static int QUICK = 5; y;Cs#eo
public final static int IMPROVED_QUICK = 6; F`m}RL]g
public final static int MERGE = 7; babL.Ua8o
public final static int IMPROVED_MERGE = 8; :\P@c(c{^C
public final static int HEAP = 9; 8 E\zjT!#\
PVp>L*|BZ;
public static void sort(int[] data) { CTW\Dt5
sort(data, IMPROVED_QUICK); i7-~"g
} ^J#*sn
private static String[] name={ pT->qQ3;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =~hb&
}; A~PR
TT/H"Ri}Jp
private static Sort[] impl=new Sort[]{ zUL,~u
new InsertSort(), QF/_?Tm4
new BubbleSort(), zP%s]>hH
new SelectionSort(), gAWi&
new ShellSort(), XJ\R'?j
new QuickSort(), 3?a`@C&x
new ImprovedQuickSort(), HTT&T9]
new MergeSort(), dhob]8b
new ImprovedMergeSort(), IZj`*M%3
new HeapSort() olv?$]
}; o& FOp'
rL1yq|]I
public static String toString(int algorithm){ HvG %##
return name[algorithm-1]; u_$4xNmQ
} dEtjcId
2$5">%?
public static void sort(int[] data, int algorithm) { hg" i;I
impl[algorithm-1].sort(data); ]"Uzn
} XLt/$Caf
IS&qFi}W|W
public static interface Sort { 63Zu5b"O/
public void sort(int[] data); @!fUp b
} &]o-ZZX
XQ}J4J~Vm
public static void swap(int[] data, int i, int j) { rgzra"u)
int temp = data; NplyvjQN;
data = data[j]; ;7z6B|8
data[j] = temp; ?'TK~,dG/
} isL zgN%
} q7Hf7^a