[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; E23w *']
} NHAH#7]M&1
int i1=l; bNXAU\M^
int i2=mid+1; @C=M UT-!
for(int cur=l;cur<=r;cur++){ #52NsVaT@
if(i1==mid+1) |by@ :@*y
data[cur]=temp[i2++]; u1N1n;#
else if(i2>r) ^aHh{BQ%
data[cur]=temp[i1++]; M%|f+u&
else if(temp[i1] data[cur]=temp[i1++]; p/3BD&6
else [Y$V\h=V
data[cur]=temp[i2++]; |(RZ/d<X\a
} ULIFSd Y
} n]v7V&mj\
{@45?L('
} ~z`/9;
eC;!YGZ
改进后的归并排序: J.W Ho c
T/NjNEd#
package org.rut.util.algorithm.support; LXNQb6!
}PZ=`w*O
import org.rut.util.algorithm.SortUtil; 79wLT\&
_ eiF@G
/** 8%-%AWF]
* @author treeroot Hd374U<8]T
* @since 2006-2-2 BGzO!s*@j
* @version 1.0 hlC%HA
*/ ]-a{IWVN
public class ImprovedMergeSort implements SortUtil.Sort { FT(iX`YQ
ZV( w
private static final int THRESHOLD = 10; l&Q!mU}
9n 6fXOC
/* 3q?5OL^$
* (non-Javadoc) )88nMH-
* vhpvO>Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )!sa)\E?
*/ e#khl9j*bt
public void sort(int[] data) { Wcn[gn<
int[] temp=new int[data.length]; [ f34a
mergeSort(data,temp,0,data.length-1); puF%=i
} "H?QqrKx
(u9Zk~)F
private void mergeSort(int[] data, int[] temp, int l, int r) { :XYy7xz<
int i, j, k; JGgxAd{L
int mid = (l + r) / 2; B9^R8|V
if (l == r) jA<T p}$!
return; n_9x"m$
if ((mid - l) >= THRESHOLD) F@EJtwLd5y
mergeSort(data, temp, l, mid); >A=\8`T^
else (bvoF5%
insertSort(data, l, mid - l + 1); nB&j
if ((r - mid) > THRESHOLD) R04J3D|
mergeSort(data, temp, mid + 1, r); >0T Za
else SX_4=^
insertSort(data, mid + 1, r - mid); H(&Z:{L
t!t=|JNf{
for (i = l; i <= mid; i++) { 6v>z h
temp = data; \igaQ\~
} oCuV9dA.
for (j = 1; j <= r - mid; j++) { Hm4bN\%
temp[r - j + 1] = data[j + mid]; 2yxi= XWZ
} VDpxk$a
int a = temp[l]; c3W BALdh
int b = temp[r]; CC#C
for (i = l, j = r, k = l; k <= r; k++) { kcY,vl
if (a < b) { PUCx]5
data[k] = temp[i++]; ~K`1
a = temp; bjzx!OCpV
} else { Bm}iU~(Z`
data[k] = temp[j--]; nh0&'hA
b = temp[j]; agT7=hX].
} j3P$@<
} eM }W6vIn
} 8[R1A
m8AAp1=
/** !Rqx2Q
* @param data gQ+9xTd
* @param l ]nc2/S%
* @param i ._,trb>o
*/ 50Ad,mn<
private void insertSort(int[] data, int start, int len) { FWY[=S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JJ-i_5\q
} U|?,N0%Z1
} kFwxK"n@C
} 9|3o<
} Z Xb}R^O-
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堆排序： |X3">U +-
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package org.rut.util.algorithm.support; )E-E0Hl>7
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import org.rut.util.algorithm.SortUtil; ANb"oX c
N9`97;.X
/** Q;20T
* @author treeroot +'%\Pr(
* @since 2006-2-2 afUTAP@
* @version 1.0 (Fqa][0
*/ c/'M#h)"
public class HeapSort implements SortUtil.Sort{ wko2M[
4m /TW)
/* (non-Javadoc) k%Eh{dA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h>W@U9
*/ gn.Ol/6D
public void sort(int[] data) { *l-`<.
MaxHeap h=new MaxHeap(); H&K3"Ulw
h.init(data); ` FxtLG,F
for(int i=0;i h.remove(); &CUC{t$VHX
System.arraycopy(h.queue,1,data,0,data.length); blp=Hk
} )&z4_l8`=
.YC;zn^
private static class MaxHeap{ k*Pz&8|
1i+FL''
void init(int[] data){ kwF]TO S
this.queue=new int[data.length+1]; qHJ'1~?q
for(int i=0;i queue[++size]=data; \u8,!) 4i
fixUp(size); G/(*foT8SE
} )E~_rDTl
} {MxnIg7'
5p )IV>G
private int size=0; }{mG/(LX8
w+Vk3c5uI)
private int[] queue; :l`i4kx
I.9o`Q[8&
public int get() { h!Y?SO.b
return queue[1]; /{R3@,D[]
} {XHk6w *-
|*E"G5WZM
public void remove() { ~d>uXrb
SortUtil.swap(queue,1,size--); ~bGnq, .$
fixDown(1); `M)E*G
} ns26$bU
file://fixdown gQR1$n0
private void fixDown(int k) { 9FNwpL'C
int j; @>:i-5
while ((j = k << 1) <= size) { df ?eL2v
if (j < size %26amp;%26amp; queue[j] j++; X'@f"=v9k
if (queue[k]>queue[j]) file://不用交换 hHEPNR[.
break; $+TYvA'N
SortUtil.swap(queue,j,k); ?`aTu:1#Z
k = j; u}m.}Mws
} bP03G=`6w
} lC2?sD$
private void fixUp(int k) { P}l#VJWp
while (k > 1) { _uJVuCc
int j = k >> 1; >HIt}Zh
if (queue[j]>queue[k]) r`[B@
break; 0\wiam-
SortUtil.swap(queue,j,k); L;Vq j]_
k = j; L~ 2q1
} ngLJ@TP-
} gLx/w\l6
!EM#m@kZ{
} t9Vb~ Ubdb
YLmjEs%
} #s{aulx
(Com,
SortUtil： 1 KB7yG-#6
#B}Qt5w
package org.rut.util.algorithm; Jh^8xI,`C
[-]A^?yBM
import org.rut.util.algorithm.support.BubbleSort; _25d%Ne0
import org.rut.util.algorithm.support.HeapSort; pI5_Hg
import org.rut.util.algorithm.support.ImprovedMergeSort; hb<k]-'!
import org.rut.util.algorithm.support.ImprovedQuickSort; 6}STp_x
import org.rut.util.algorithm.support.InsertSort; eQ\jZ0s;p
import org.rut.util.algorithm.support.MergeSort; !%wdn33"
import org.rut.util.algorithm.support.QuickSort; QXB|!'
import org.rut.util.algorithm.support.SelectionSort; "qgu$N4/>
import org.rut.util.algorithm.support.ShellSort; 117c,yM0
8H_l[/
/** $W*|~}F/Ap
* @author treeroot F"v:}Vy|
* @since 2006-2-2 9M]^l,
* @version 1.0 |=u96G~N
*/ 6+)x7g1PL
public class SortUtil { shNE~TA
public final static int INSERT = 1; k{{hZ/om
public final static int BUBBLE = 2; W\NG>t
public final static int SELECTION = 3; T*R{L
public final static int SHELL = 4; 44j,,k
public final static int QUICK = 5; ?DRR+n _
public final static int IMPROVED_QUICK = 6; X?R |x[
public final static int MERGE = 7; :t%)5:@A
public final static int IMPROVED_MERGE = 8; dEG ]riO
public final static int HEAP = 9; Fn> <q:
$NdH*
public static void sort(int[] data) { VAg68EbnF
sort(data, IMPROVED_QUICK); +nzTxpcP@K
} !%V*UR9
private static String[] name={ 1xIFvXru
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T$IUKR
}; ~ttKI4
@C07k^j=U
private static Sort[] impl=new Sort[]{ ",QPb3
new InsertSort(), >HX)MwAP
new BubbleSort(), 3AvcJ1
new SelectionSort(), z 7@ 'CJ
new ShellSort(), q}e]*]dJZ
new QuickSort(), +xq=<jy
new ImprovedQuickSort(), 9GE]<v,_[
new MergeSort(), 3@'lIV ?,q
new ImprovedMergeSort(), ^1Yo-T(R
new HeapSort() uD[^K1Ag]^
}; 0H<4+ *`K
Z7oaQ\fR
public static String toString(int algorithm){ @f%wd2
return name[algorithm-1]; )lOji7&e
} =nw0# '
u X>PefR
public static void sort(int[] data, int algorithm) { w0X$rl1
impl[algorithm-1].sort(data); >R#9\/s
} Stt* 1gT
MorW\7-}
public static interface Sort { IX?@~'
public void sort(int[] data); egbb1+tY
} OFQ{9
RRNH0-D1l
public static void swap(int[] data, int i, int j) { ze ?CoDx2
int temp = data; n-W?Z'H{r
data = data[j]; E::<;9
data[j] = temp; j $KM9
} "s${!A)
} Ir^BC!<2>