[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; 2D "mq~V
} ^uYxeQY[
int i1=l; ~q<UE\H
int i2=mid+1; TygRG+G-
for(int cur=l;cur<=r;cur++){ >8ePx,+!
if(i1==mid+1) 3]wV`mD
data[cur]=temp[i2++]; c1c0b|B!U
else if(i2>r) x.'O_7c0:
data[cur]=temp[i1++]; oYu5]ry
else if(temp[i1] data[cur]=temp[i1++]; JMoWA0f
else /0zk&g
data[cur]=temp[i2++]; ^K3{6}]
} Q?vGg{>
} ifuVVFov
8Y:bvs.j
} C6GYhG]
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改进后的归并排序: TK'(\[E
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package org.rut.util.algorithm.support; E_FseR6
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import org.rut.util.algorithm.SortUtil; 98x(2fCvF(
WFtxEIrl3j
/** GX\/2P7CZ
* @author treeroot " 4s,a
* @since 2006-2-2 (d_{+O"
* @version 1.0 _,5(HETE2
*/ p3X>
public class ImprovedMergeSort implements SortUtil.Sort { qV5ME#TJ
ZYg="q0x&
private static final int THRESHOLD = 10; dq[CT
N1_nBQF )
/* ^/c&Ud
* (non-Javadoc) =8[HC}s|$
* aVd{XVE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~W!sxM5(*
*/ LTrn$k3}
public void sort(int[] data) { O0wD"V^W
int[] temp=new int[data.length]; }nuhLt1
mergeSort(data,temp,0,data.length-1); I(pU_7mw
} P*G&pitT
y!!p:3
private void mergeSort(int[] data, int[] temp, int l, int r) { Aj-}G^>#
int i, j, k; Dg\fjuK9
int mid = (l + r) / 2; $$AKz\
if (l == r) oMcX{v^"
return; +,If|5>(
if ((mid - l) >= THRESHOLD) }56"4/ Z
mergeSort(data, temp, l, mid); f:e~ystm
else <vOljo
insertSort(data, l, mid - l + 1); wOINcEdx
if ((r - mid) > THRESHOLD) haS`V
mergeSort(data, temp, mid + 1, r); s(F^P
else a(!:a+9WOP
insertSort(data, mid + 1, r - mid); A:>G:X5t
W&)OiZN
for (i = l; i <= mid; i++) { t[%9z6t
temp = data; DqbN=[!X~n
} [K,&s8N5
for (j = 1; j <= r - mid; j++) { 6dV92:
temp[r - j + 1] = data[j + mid]; Wk`G+VR+
} taw #r
int a = temp[l]; vuA';,:~
int b = temp[r]; anHP5gD
for (i = l, j = r, k = l; k <= r; k++) { KD=T04v
if (a < b) { J %URg=r
data[k] = temp[i++]; u JGYXlLE
a = temp; }Z"<KF
} else { ^2XoYgv
data[k] = temp[j--]; &H<-joZ)Z\
b = temp[j]; ewD61Y8-
} "C%;9_ig$
} o^2.&e+dQ
} %/jmQ6z^
TAIcp*)ZM
/** IYb@@Jzo
* @param data xqX~nV#TB
* @param l }>fL{};Z"
* @param i 4, 8gf2
*/ mbU[fHyV
private void insertSort(int[] data, int start, int len) { &$|k<{j[<f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =#SKN\4
} YB.r-c"Y
} ZmUS}
} hI]KT a
} =k'3rm*ld
aV,>y"S
堆排序： ?E=&LAI#
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package org.rut.util.algorithm.support; P.=&:ay7?
i` n,{{x&4
import org.rut.util.algorithm.SortUtil; rV54-K;`0
pu=Q;E_f[
/** 7{2knm^
* @author treeroot +3!um
* @since 2006-2-2 `dx+Qp
* @version 1.0 JO1KkIV
*/ :TxfkicN\
public class HeapSort implements SortUtil.Sort{ M8Q-x-7
dt<PZ.
/* (non-Javadoc) JIQS'r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FD,M.kbg
*/ /k l0(='
public void sort(int[] data) { \M'b%
MaxHeap h=new MaxHeap(); J+kxb"#d
h.init(data); ;a[56W
for(int i=0;i h.remove(); 2(Vm0E
System.arraycopy(h.queue,1,data,0,data.length); fYl$$.
} ?x%HQ2`
H'P1EZtq
private static class MaxHeap{ z<hy#BIjnd
L Lm{:T7
void init(int[] data){ w%g@X6
this.queue=new int[data.length+1]; Q_x/e|sd
for(int i=0;i queue[++size]=data; ke!)C[^7z
fixUp(size); ,g;~:
} ,yNPD}@v>
} .yd{7Te
80x %wCY`
private int size=0; 3 8m5&5)1F
Y, )'0O
private int[] queue; }[SWt3qV1
%F` cNw]
public int get() { k^:$ETW2 D
return queue[1]; j]6Z*AxQ
} &Ru|L.G`
4t|ril``]
public void remove() { Eo!1 WRruF
SortUtil.swap(queue,1,size--); a]Bm0gdrO
fixDown(1); 9N:Bu'j&/
} uI}S9
file://fixdown m>yk4@a
private void fixDown(int k) { y4tM0h
int j; G!C2[:[g
while ((j = k << 1) <= size) { :MV]OLRM
if (j < size %26amp;%26amp; queue[j] j++; W7c(] tg.
if (queue[k]>queue[j]) file://不用交换 hCD0Zel
break; n{6XtIoYq
SortUtil.swap(queue,j,k); 6@t4pML
k = j; h7)^$Hd
} .DMeWi
} R#"kh/M
private void fixUp(int k) { s7A{<>:
while (k > 1) { /QZnN?k
int j = k >> 1; 3?|Fn8dQR.
if (queue[j]>queue[k]) T2P0(rEz
break; ?Lbwo<E
SortUtil.swap(queue,j,k); bN`oQ.Z 4
k = j; hWfJh0I
} rW0# 6
} . p^='Kz?
I3uaEv7OZc
} gLa#y
d+[yW7%J
} Cg?D<l4
#'^!@+)
SortUtil： tV<}!~0,*
iW(HOsA
package org.rut.util.algorithm; sU^2I v\%
M`*B/Fh2
import org.rut.util.algorithm.support.BubbleSort; KdHR.;*
import org.rut.util.algorithm.support.HeapSort; r :{2}nE
import org.rut.util.algorithm.support.ImprovedMergeSort; ClCb.Ozj4
import org.rut.util.algorithm.support.ImprovedQuickSort; ID &Iz
import org.rut.util.algorithm.support.InsertSort; _r0oOpE
import org.rut.util.algorithm.support.MergeSort; &^Zo}F2V
import org.rut.util.algorithm.support.QuickSort; B.-5$4*s
import org.rut.util.algorithm.support.SelectionSort; 9<I@}w
import org.rut.util.algorithm.support.ShellSort; >9'G>~P~I=
,A[40SZA
/** (C={/waJ
* @author treeroot .]6_
* @since 2006-2-2 CkE@Ll3Z
* @version 1.0 9$c0<~B\
*/ P%z\^\p"5
public class SortUtil { T^B&GgW
public final static int INSERT = 1; p+SFeUp
public final static int BUBBLE = 2; }{[H@uhjH
public final static int SELECTION = 3; FbO-K-
public final static int SHELL = 4; yv=LT~
public final static int QUICK = 5; DmEmv/N=
public final static int IMPROVED_QUICK = 6; &W:Wv,3
public final static int MERGE = 7; c9/w-u~j
public final static int IMPROVED_MERGE = 8; *v)JX _
public final static int HEAP = 9; }@J&yrqg
Q.7Rv XNw8
public static void sort(int[] data) { Tw/kD)u{
sort(data, IMPROVED_QUICK); FY)vrM*yh
} w|pk1~c(_
private static String[] name={ PX65Z|~>_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dd>|1'-]
}; :{pvA;f
[]/=!?5B
private static Sort[] impl=new Sort[]{ y8HLrBTza
new InsertSort(), {";5n7<<)
new BubbleSort(), wv>Pn0cO
new SelectionSort(), }jBr[S5
new ShellSort(), ol^V@3[<
new QuickSort(), M p:c.
new ImprovedQuickSort(), fQi7e5
new MergeSort(), $IX>o&S@|
new ImprovedMergeSort(), QDYS}{A:V
new HeapSort() WCA`34(
}; /Mb?dVwA
tuo'4%]i
public static String toString(int algorithm){ lBqu}88q0
return name[algorithm-1]; \~UyfVPRT
} Ck8`$x&t
^crk8O@Fw
public static void sort(int[] data, int algorithm) { H$zjN8||"
impl[algorithm-1].sort(data); (C*G)Aj7
} %Js3Y9AL C
dRTtDH"%
public static interface Sort { 767xCP
public void sort(int[] data); 7m_Jb5
} ;Xg6'yxJ
G,9osTt/
public static void swap(int[] data, int i, int j) { 4SCb9|/Q
int temp = data; yS p]+
data = data[j]; .",E}3zn
data[j] = temp; aF2eGh
} #~*fZ|sq+3
} ';us;xR#