[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; x|U~?
} s0uI;WMg
int i1=l; SF$7WG3Q
int i2=mid+1; =}>wxO
for(int cur=l;cur<=r;cur++){ x=T`i-M
if(i1==mid+1) <_$]!Z6UR
data[cur]=temp[i2++]; ?j;e/r.
else if(i2>r) XI:8_F;Q
data[cur]=temp[i1++]; pd{W(M78g
else if(temp[i1] data[cur]=temp[i1++]; =F'p#N0_2
else -1iKeyyA
data[cur]=temp[i2++]; Ec IgX_\
} 9pUvw_9MY
} fZ1v|
'{dduHo
} %E#OUo[y/
.Uq?SmK
改进后的归并排序: b~X^vXIv%%
e8g"QDc
package org.rut.util.algorithm.support; @ODwO;_R5
E .^5N~.
import org.rut.util.algorithm.SortUtil; f2Zi.?``H
CT,caa
/** DP\s-JpI[
* @author treeroot 'QGacV
* @since 2006-2-2 B?Ac
* @version 1.0 KwK[)Cvv
*/ ?PVJeFH
public class ImprovedMergeSort implements SortUtil.Sort { Mx<z34(T
@)s;u}H
private static final int THRESHOLD = 10; #=F"PhiX`
uT'_}cw
/* qcMVY\gi
* (non-Javadoc) i;Cs,Esnf
* M2HO!btf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ALvj)I`Al
*/ bj23S&
public void sort(int[] data) { Vcn04j#Q
int[] temp=new int[data.length]; Vij P;
mergeSort(data,temp,0,data.length-1); f0p+l-iEv
} AQn>K{M
x{4Rm,Dxn
private void mergeSort(int[] data, int[] temp, int l, int r) { GslUN% UJr
int i, j, k; HDQhXw!!hc
int mid = (l + r) / 2; T'\B17 :*
if (l == r) j,%@%upM
return; xw_VK1
if ((mid - l) >= THRESHOLD) h4rIt3`
mergeSort(data, temp, l, mid); vvA=:J4/i)
else 3ThBy'
insertSort(data, l, mid - l + 1); 06DT2
if ((r - mid) > THRESHOLD) } 8ZCWmd
mergeSort(data, temp, mid + 1, r); 5v"r>q[ X
else uD4=1g6[s
insertSort(data, mid + 1, r - mid); !`5[(lm
pRI<L'
for (i = l; i <= mid; i++) { @P=St\;VP
temp = data; OS8 ^mC
} +Qy*s1fit
for (j = 1; j <= r - mid; j++) { ~3byAL
temp[r - j + 1] = data[j + mid]; <@i.~EL
} v{{Cj83S+
int a = temp[l]; L%](C
int b = temp[r]; u8ofgcFYE
for (i = l, j = r, k = l; k <= r; k++) { ^0"^Xk*
if (a < b) { T}} 0hs;
data[k] = temp[i++]; N]n]7(e+0C
a = temp; i9Fg
} else { C!Cg.^;
data[k] = temp[j--]; 9~+A<X]Hd
b = temp[j]; 7sP;+G
} O7@CAr
} v|5:;,I
} Z(Da?6#1
+pYrAqmO-
/** F) w.q
* @param data <p@c%e,_
* @param l XL[/)lX{
* @param i NGYliP,.6
*/ ]zp5 6U|xa
private void insertSort(int[] data, int start, int len) { 3:Bwf)*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B$~oZ'4v
} whb|N2
} DLMG<4Cd~
} e$F]t*)Xa
} z;1y7W!v
%bI(
堆排序： |8I #`
8r '
package org.rut.util.algorithm.support; M99#\0=/
i`o}*`//
import org.rut.util.algorithm.SortUtil; ?DcRD)X
xe^*\6Y
/** gfQ&U@N
* @author treeroot "zW3dKVc
* @since 2006-2-2 #PnuR2s7.
* @version 1.0 S,T?(lSl
*/ }* iag\
public class HeapSort implements SortUtil.Sort{ mhnjYK9
PfX{n5yBW8
/* (non-Javadoc) hW*2Le!I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DO<eBq\O
*/ `abQlBb*
public void sort(int[] data) { j]7|5mC78
MaxHeap h=new MaxHeap(); [vki^M5i|Z
h.init(data); ?]%JQ]Gf*
for(int i=0;i h.remove(); xsK{nM6g
System.arraycopy(h.queue,1,data,0,data.length); htc& !m
} $q*kD#;mh
-1Y9-nn[m
private static class MaxHeap{ gyH'92ck
/x.TF'Z*
void init(int[] data){ Q,Tet&in )
this.queue=new int[data.length+1]; ]2G5ng' @
for(int i=0;i queue[++size]=data; <%eY>E
fixUp(size); I(BG%CO9
} 51yIW*
} "sLdkd}dj
<4jQbY;
private int size=0; y7SOz'd
:0o $qz2
private int[] queue; Z4FyuWc3
b ABx'E
public int get() { :PtpIVAosg
return queue[1]; QFoZv+|
} n<MMO=+bg
XfA3Ez,}
public void remove() { .d`+#1Ot(
SortUtil.swap(queue,1,size--); T=cSTS!P;q
fixDown(1); Rf@D]+v
} ;SQ<^"eK
file://fixdown Wd4fIegk
private void fixDown(int k) { L/(e/Jalg
int j; (^GVy=
while ((j = k << 1) <= size) { Myss$gt}
if (j < size %26amp;%26amp; queue[j] j++; khT&[!J{>
if (queue[k]>queue[j]) file://不用交换 tb,.f3;
break; $w%oLI@kl
SortUtil.swap(queue,j,k); /^96|
k = j; !8&,GT
} a?'3
} ;ak3@Uee
private void fixUp(int k) { xVoWGz7
while (k > 1) { J#Fe"
int j = k >> 1; }]vj"!?a
if (queue[j]>queue[k]) }@yvw*c
break; +C7 1".i-
SortUtil.swap(queue,j,k); w?ssV
k = j; IV^LYu
} dsDoPo0!
} q3Umqvl)oe
G],+?E_,
} O<4i)Lx2
2>Kq)Ii
} 1_:1cF{w
/rp4m&!
SortUtil： `XYT:'
RBx`<iBe
package org.rut.util.algorithm; ;a!o$y
[rqe;00]
import org.rut.util.algorithm.support.BubbleSort; qx 3.oU
import org.rut.util.algorithm.support.HeapSort; k/l@P
import org.rut.util.algorithm.support.ImprovedMergeSort; 4,9AoK)yp
import org.rut.util.algorithm.support.ImprovedQuickSort; 7UHqiA`L
import org.rut.util.algorithm.support.InsertSort; ?97MW a
import org.rut.util.algorithm.support.MergeSort; Qv8#{y@U
import org.rut.util.algorithm.support.QuickSort; n ! qm
import org.rut.util.algorithm.support.SelectionSort; A(_AOoA'
import org.rut.util.algorithm.support.ShellSort; B%6bk.
a#H=dIj
/** Ary$,3X2
* @author treeroot nR/; uTTz
* @since 2006-2-2 ,r5<v_
* @version 1.0 r0G#BPgdR
*/ d_J?i]AP|'
public class SortUtil { iMx+y5O
public final static int INSERT = 1; Y=X"YH|
public final static int BUBBLE = 2; MSeO#X
public final static int SELECTION = 3; wI>JOV7
public final static int SHELL = 4; L:YsAv
public final static int QUICK = 5; 1hZM))
public final static int IMPROVED_QUICK = 6; y:4Sw#M%(
public final static int MERGE = 7; ;0E"4(S.q1
public final static int IMPROVED_MERGE = 8; j-gLX
public final static int HEAP = 9; ;KQ'/nII
2BH>TmS
public static void sort(int[] data) { a2/r$Tgm
sort(data, IMPROVED_QUICK); 9?D7"P+
} s cR-|GuZ
private static String[] name={ X1<)B]y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y'fI4
}; 'G(N,vu[@
oE#HI2X
private static Sort[] impl=new Sort[]{ P},S[GaZ
new InsertSort(), %fP^Fh
new BubbleSort(), ~b\7qx_a9
new SelectionSort(), JoW*)3Z
new ShellSort(), p8s2#+/
new QuickSort(), Oi BK
new ImprovedQuickSort(), {\|? {8f
new MergeSort(), u-UUF
new ImprovedMergeSort(), ?^BsR
new HeapSort() 1@)]+* F*z
}; gbpm::
SNvK8,"g
public static String toString(int algorithm){ $pk3d+0B
return name[algorithm-1]; i`&yPw
} ]kb%l"&
vzi=[A
public static void sort(int[] data, int algorithm) { &8"a7$
impl[algorithm-1].sort(data); ^\N2 Iu>6
} p5F[( H|9
^%_B'X9
public static interface Sort { 8YkP57Y%[Z
public void sort(int[] data); 74gU4T
} EoU}@MjM~
L*FmJ{Yf
public static void swap(int[] data, int i, int j) { gY0*u+LF
int temp = data; |Q9S$l]
data = data[j]; 6FEtq,;0w
data[j] = temp; /oiAAB27
} JS(KCY9
} YD@V2gK