[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; %^^h) Wy}
} \FI^Vk
int i1=l; ^~I @ spR4
int i2=mid+1; c=t*I0-OVS
for(int cur=l;cur<=r;cur++){ 8D~Dd!~P
if(i1==mid+1) urxqek
data[cur]=temp[i2++]; w?ai,Pw
else if(i2>r) pB'x_z
data[cur]=temp[i1++]; 5K(n3?1z)
else if(temp[i1] data[cur]=temp[i1++]; O`[]xs
else *#ompm
data[cur]=temp[i2++]; ucFw,sB1
} ip5u_Xj?
} r|8V @.@i
A1!:BC
} #6FaIq92V
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改进后的归并排序: {dZ8;Fy4
<<BQYU)Ig
package org.rut.util.algorithm.support; lIy/;hIc
mSj76'L#
import org.rut.util.algorithm.SortUtil; u-/3(dKt
J:W'cH$cR
/** 0N1' $K$\
* @author treeroot Fr/QW7B5
* @since 2006-2-2 `1p?*9Ssn
* @version 1.0 5fxbA2\
*/ $WD +Q@6
public class ImprovedMergeSort implements SortUtil.Sort { \R;K>c7=
@5*xw1B
private static final int THRESHOLD = 10; ZmO'IT=Ye
}Ch[|D=Wd6
/* 3&'R1~Vh
* (non-Javadoc) hd=j56P5P
* = P8~n2V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &.*T\3UO
*/ <\xQ7|e
public void sort(int[] data) { /kb$p8!C".
int[] temp=new int[data.length]; \1khyF'
mergeSort(data,temp,0,data.length-1); ]*h&hsS0
} |x[$3R1@
_9qEZV
private void mergeSort(int[] data, int[] temp, int l, int r) { )ldUayJ
int i, j, k; r?XDvU
int mid = (l + r) / 2; C_89YFn+
if (l == r) 8ok7|DJ
return; z5I^0'
if ((mid - l) >= THRESHOLD) Lj-{t% }
mergeSort(data, temp, l, mid); $ACe\R/%
else >|S>J+(
insertSort(data, l, mid - l + 1); dTgM"k
if ((r - mid) > THRESHOLD) 6 cr^<]v!
mergeSort(data, temp, mid + 1, r); Uc>LFX& -B
else o[H\{a>
insertSort(data, mid + 1, r - mid); |<2JQ[]
nR#a)et
for (i = l; i <= mid; i++) { a#6,#Q"
temp = data; _.hIv8V
} qFGB'mIrFz
for (j = 1; j <= r - mid; j++) { .k|-Ks|d|
temp[r - j + 1] = data[j + mid]; ^K*~ <O-
} j!"iYtgV
int a = temp[l]; \c'%4Ao
int b = temp[r]; 0I6499FQ
for (i = l, j = r, k = l; k <= r; k++) { _fe0,
if (a < b) { CYMM*4#
data[k] = temp[i++]; I[a%a!QO
a = temp; %G^(T%q| m
} else { 4I+.^7d
data[k] = temp[j--]; sF, uIr/
b = temp[j]; Xd5! Ti}
} +&zb^C`J
} nEuct4BcL}
} MgSp.<!
xQ_:]\EZ
/** S@;&U1@h
* @param data GZ}*r{
* @param l Y#.6d
* @param i G-ZrM
*/ V=Ww>
private void insertSort(int[] data, int start, int len) { T\.7f~3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); " Tw0a!
} e*6U |+kJ
} )62q|c9F
} eF*TLI<[^I
} qLu8!|QT
}b<87#Nb9R
堆排序： Rqt[D @;m
ejDCmD
package org.rut.util.algorithm.support; wZ}n3R,
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import org.rut.util.algorithm.SortUtil; D'Jm!Ap
`8qT['`#R
/** 20S9/9ll
* @author treeroot D;K&
* @since 2006-2-2 Bl:{p>-q
* @version 1.0 Nt?2USTs-
*/ @)S sKk|
public class HeapSort implements SortUtil.Sort{ zT2F&y q
P((S2"D<4
/* (non-Javadoc) 19pND m2H1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (bM)Nd
*/ IH*U!_ `
public void sort(int[] data) { y_;]=hEL
MaxHeap h=new MaxHeap(); 5>0\e_V
h.init(data); 0]/,m4a#n
for(int i=0;i h.remove(); 5?S{W
System.arraycopy(h.queue,1,data,0,data.length); wCTcGsw W
} ^M[-K`c}
Y8{T.\%\+
private static class MaxHeap{ >}xAg7\^
w50.gr7
void init(int[] data){ OYQXi
this.queue=new int[data.length+1]; & bp#1KR)
for(int i=0;i queue[++size]=data; ~m009
fixUp(size); f]{1ZU%4
} /7!_un9
} >F_qa=t%[
g>d7%FFn}
private int size=0; 1oXz[V
Ew)n~!s
private int[] queue; &/z+A{Hi
Z{8exym
public int get() { HMl!?%%
return queue[1]; d;*OO xQV
} jb#1&L14
5#N"WHz!
public void remove() { w%%6[<3%
SortUtil.swap(queue,1,size--); G "c&C
fixDown(1); VPq5xSc?
} {66Q" H"I
file://fixdown dM>j<JC=
private void fixDown(int k) { Cw9@2E'b
int j; "^e}C@
while ((j = k << 1) <= size) { /\oyPD`((
if (j < size %26amp;%26amp; queue[j] j++; ,E n(gm
if (queue[k]>queue[j]) file://不用交换 ZQgxrZx3
break; ]x5(bnWx
SortUtil.swap(queue,j,k); GgZEg ?@
k = j; >b/k|?xP
} cQUH%7m
} QiQ2XW\E
private void fixUp(int k) { oX=*MEfX
while (k > 1) { i`ZHjW~`
int j = k >> 1; ?[NTw./'7A
if (queue[j]>queue[k]) TV$\v@\ =
break; }+QhW]nO{F
SortUtil.swap(queue,j,k); 6_ 33*/>=c
k = j; F|h,a;2
} r P<d[u
} f<$K.i
Dn{19V.L
} TA-(_jm
p: Q%Lg_I
} a{%52B"
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SortUtil： Sl+jduc
P_^|KEz
package org.rut.util.algorithm; /S2p``E+
~Q{[fy=
import org.rut.util.algorithm.support.BubbleSort; !)l%EJngL
import org.rut.util.algorithm.support.HeapSort; z_[3IAZ
import org.rut.util.algorithm.support.ImprovedMergeSort; nEZ-h7lzl(
import org.rut.util.algorithm.support.ImprovedQuickSort; q:D0$YY0
import org.rut.util.algorithm.support.InsertSort; o q'J*6r
import org.rut.util.algorithm.support.MergeSort; 5Qm.ECXV
import org.rut.util.algorithm.support.QuickSort; fjz2m
import org.rut.util.algorithm.support.SelectionSort; m`1}O"<&i
import org.rut.util.algorithm.support.ShellSort; r~Is,.zZ}
<*~BG)b
/** ] _]6&PZXk
* @author treeroot -h^} jP8
* @since 2006-2-2 =4w^)'/
* @version 1.0 CoKj'jA
*/ )ZuQ;p
public class SortUtil { #4|i@0n}D
public final static int INSERT = 1; ?@,f[U-
public final static int BUBBLE = 2; JE8p5WaR
public final static int SELECTION = 3; !m/Dd0
public final static int SHELL = 4; v2W"+QS}u
public final static int QUICK = 5; eA~_)-Z-
public final static int IMPROVED_QUICK = 6; eiNk]KXAYX
public final static int MERGE = 7; h#6 jUQ
public final static int IMPROVED_MERGE = 8; NIXcib"tG
public final static int HEAP = 9; n<Xm%KH.
ck4T#g;=
public static void sort(int[] data) { #k|g9`
sort(data, IMPROVED_QUICK); }IalgQ(i
} Q e2/4j4
private static String[] name={ *t]&b ;=gE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "8j;k5<
}; vSHIl"h
zLIa! -C
private static Sort[] impl=new Sort[]{ MWd_6XM
new InsertSort(), TckR_0LNV
new BubbleSort(), v2uS6
new SelectionSort(), oJz:uv8Pe.
new ShellSort(), JNA}EY^2I.
new QuickSort(), M$5%QM}
new ImprovedQuickSort(), 0z<]\a4
new MergeSort(), 5M.n'*
new ImprovedMergeSort(), ~"4vd 3
new HeapSort() z6>ZV6(d2^
}; #t9=qR~"
rc{[\1 -N
public static String toString(int algorithm){ l4BO@
return name[algorithm-1]; Xta>
} HDae_.
.WPR}v,.Z
public static void sort(int[] data, int algorithm) { ~D-OL*2
impl[algorithm-1].sort(data); 7.1E mJ
} V2sB[Mw
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public static interface Sort { fKK-c9F
public void sort(int[] data); Xe^=(| M
} "ih>T^|
5Z>pa`_$2
public static void swap(int[] data, int i, int j) { Qd)cFL"v
int temp = data; Nz;*;BQK:
data = data[j]; @xM!:
data[j] = temp; u g$\&rM>
} ?0)XS<
} #*aGzF