[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; w?A6S-z
} p!p:LSk"/b
int i1=l; tD3v`Ke
int i2=mid+1; :3By7BZgj
for(int cur=l;cur<=r;cur++){ sKGR28e
if(i1==mid+1) \t']Lf
data[cur]=temp[i2++]; bc*CP0t|
else if(i2>r) #TG.weTC
data[cur]=temp[i1++]; FK`M+ j
else if(temp[i1] data[cur]=temp[i1++]; S1d{! ` 3
else , Y cF~
data[cur]=temp[i2++]; 4j-%I7
} fdzaM&
} 1<&nHFJ;[
ZD`0(CkXb
} 0^zp*u
G}gmkp]z
改进后的归并排序: iig@$ i#
kZHIzU
package org.rut.util.algorithm.support; Nmu=p~f}3`
,~qjL|9
import org.rut.util.algorithm.SortUtil; )W$@phY(I
$|!@$Aj
/** 9i/VvW
* @author treeroot {&s.*5
* @since 2006-2-2 ?M@ff0
* @version 1.0 @N+6qO}
*/ XiN@$
public class ImprovedMergeSort implements SortUtil.Sort { _6{XqvWqb
{x/)S*:Z
private static final int THRESHOLD = 10; =9cN{&qf
. I#dR*
/* !6DH6<HC
* (non-Javadoc) !ZTBiC5R
* 3q:>NB<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bq#B+JwX
*/ >r5s>A[YC
public void sort(int[] data) { ?UV!^w@L:0
int[] temp=new int[data.length]; g)Dg=3+>
mergeSort(data,temp,0,data.length-1); Sv|jR r'
} '7/c7m/$X<
&{H LYxh
private void mergeSort(int[] data, int[] temp, int l, int r) { <&p0:S7
int i, j, k; _q1E4z
int mid = (l + r) / 2; "o>gX'm*
if (l == r) 56^#x
return; !Di*y$`}b
if ((mid - l) >= THRESHOLD) s!F` 0=J^
mergeSort(data, temp, l, mid); 2]f?c%)I
else EiWsVic[
insertSort(data, l, mid - l + 1); .]H1uoci|
if ((r - mid) > THRESHOLD) 2vx1M6a)L
mergeSort(data, temp, mid + 1, r); ! )PV-[2
else AWn$od`#s
insertSort(data, mid + 1, r - mid); C9%2}E3Z$)
P`!31P#]L
for (i = l; i <= mid; i++) { kC4}@{4i
temp = data; m #}%l3$
} (SGU]@)g
for (j = 1; j <= r - mid; j++) { rk .tLk
temp[r - j + 1] = data[j + mid]; Z^SF $+UN
} yUp"%_t0
int a = temp[l]; S 0L"5B@
int b = temp[r]; 0dKi25J
for (i = l, j = r, k = l; k <= r; k++) { xRPUGGv
if (a < b) { ]J>{ZL
data[k] = temp[i++]; `u7"s'
a = temp; iP^o]4[c
} else { "Zq)y_1
data[k] = temp[j--]; S67>yqha
b = temp[j]; 3pk`&'
} /5 6sPl 7}
} >pq= .)X}
} $@Fvl-lK
}E]&,[4&M
/** j9]H~:g$d
* @param data O[/l';i
* @param l 47 *,
* @param i y(uE
*/ =[T_`*s&
private void insertSort(int[] data, int start, int len) { ZVX!=3VT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5zR9N>!c
} f+iM_MI
} ^t#W?rxp&
} +U];
} `U[s d*C"
?ta(`+"
堆排序： mhZ60RW
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package org.rut.util.algorithm.support; 8O0E;6b
-^+!:0';
import org.rut.util.algorithm.SortUtil; NT}r6V(Aju
[$[1|r *Q
/** ^jxV
* @author treeroot Zr U9oy&!C
* @since 2006-2-2 ?*h2:a$
* @version 1.0 &mJ +#vT
*/ ~i ImM|*0
public class HeapSort implements SortUtil.Sort{ g8^YDrH
qS{E+)P
/* (non-Javadoc) s#*T(pY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [h^>Iq (Z
*/ Gcz@z1a=n
public void sort(int[] data) { 4OOH 3O
MaxHeap h=new MaxHeap(); pk,]yi,ZF
h.init(data); ,]UCq?YW)T
for(int i=0;i h.remove(); GIGC,zP@k
System.arraycopy(h.queue,1,data,0,data.length); , e6}p
} //_aIp
h<8.0
private static class MaxHeap{ ?rG>SA>o
q V+gQ
void init(int[] data){ D3BT>zTGK
this.queue=new int[data.length+1]; ?6=u[))M&
for(int i=0;i queue[++size]=data; rbw5.NU
fixUp(size); JL1z8Nu
} ~p0M|
} bm:"&U*tu'
sa26u`?
private int size=0; 4Y#F"+m.]
'**dD2 n
private int[] queue; 50l!f7
,-GkP>8f(
public int get() { Ja@zeD)f"
return queue[1]; wQV[ZfU^h
} _R 6+bB$
ySEhi_)9^
public void remove() { Xi~%,~
SortUtil.swap(queue,1,size--); ;&N=t64"
fixDown(1); vL,:Yn@b
} &+v!mw>
file://fixdown yaD_c;
private void fixDown(int k) { X/l{E4Ex
int j; 3r]:k)J
while ((j = k << 1) <= size) { ~Os1ir.
if (j < size %26amp;%26amp; queue[j] j++; ,4&?`Q
if (queue[k]>queue[j]) file://不用交换 `f~\d.*U
break; QxaW x
SortUtil.swap(queue,j,k); g} /efE
k = j; [_pw|BGp
} MY]<^/Q
} 6?C|pO
private void fixUp(int k) { ?mCino
while (k > 1) { <HC5YA)4
int j = k >> 1; w#!^wN
if (queue[j]>queue[k]) zcn/LF
break; (v'#~)R_`
SortUtil.swap(queue,j,k); F^/1 u
k = j; qlJzXq{|`
} (WISf}[l;
} z9B""ws
[$<\*d/
} ..5rW0lr
(&)PlIi7
} 8wXnc%
WX9ABh&5
SortUtil： g]V_)}
m@Vz42g~+
package org.rut.util.algorithm; @*VfG CQ(
Z@G[\"
import org.rut.util.algorithm.support.BubbleSort; TJY [s-
import org.rut.util.algorithm.support.HeapSort; @g{FNXY$m
import org.rut.util.algorithm.support.ImprovedMergeSort; 3iI 4yg
import org.rut.util.algorithm.support.ImprovedQuickSort; Q2L>P<87T
import org.rut.util.algorithm.support.InsertSort; \pVmSac,
import org.rut.util.algorithm.support.MergeSort; ]#fmih^
import org.rut.util.algorithm.support.QuickSort; |*T3TsP u
import org.rut.util.algorithm.support.SelectionSort; ~g|Z6-?4Jj
import org.rut.util.algorithm.support.ShellSort; B,_/'DneQK
1#D&cx6
/** %\|9_=9Wn
* @author treeroot {%"n[DLps
* @since 2006-2-2 $q iY)RE
* @version 1.0 pr) `7VuKp
*/ R'udC}
public class SortUtil { ?m(]@6qa
public final static int INSERT = 1; s6k@WT?"^
public final static int BUBBLE = 2; a At<36{?
public final static int SELECTION = 3; )#H&lH
public final static int SHELL = 4; L^{1dVGWNa
public final static int QUICK = 5; 6Kbc:wlR
public final static int IMPROVED_QUICK = 6; E<~Fi.M;\
public final static int MERGE = 7; o^!_S5zKe.
public final static int IMPROVED_MERGE = 8; djk?;^8
public final static int HEAP = 9; Jx jP'8
+~x'1*A_
public static void sort(int[] data) { %lbDcEsf9
sort(data, IMPROVED_QUICK); Oe/&Ryj=mm
} g"dq;H
private static String[] name={ hp$/O4fD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .yF@Ow
}; cOq'MDr
zarxv| }$
private static Sort[] impl=new Sort[]{ Ki,SFww8r
new InsertSort(), cUH.^_a
new BubbleSort(), 1z6$>{FUR
new SelectionSort(), wOLDHg_
new ShellSort(), 0'QX*xfa>
new QuickSort(), d5z=fH9
new ImprovedQuickSort(), 2&,jO+BqE@
new MergeSort(), tpY]Mz[J
new ImprovedMergeSort(), v><c@a=[
new HeapSort() :]rb}1nLB
}; `k.Tfdu)K
mdtG W
public static String toString(int algorithm){ xk:=.Qqh
return name[algorithm-1]; 'e(]woe
} T)Zef
' a>YcOw
public static void sort(int[] data, int algorithm) { )-s9CWJv
impl[algorithm-1].sort(data); 'xP&u<(F
} pK|~G."6e
2A95vC'u>|
public static interface Sort { -P.51q
public void sort(int[] data); %A$5mi^
} JqmxS*_P
n6xJ
public static void swap(int[] data, int i, int j) { HVHd@#pDZ
int temp = data; V'q?+p] a
data = data[j]; RDSkFK( D
data[j] = temp; {O=PVW2S
} #aua6V!"
} 1 O?bT,"b