[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; Q6}`%
} K 7YpGGd5
int i1=l; 8?I(wn
int i2=mid+1; Q&n
for(int cur=l;cur<=r;cur++){ `' 6]Z*
if(i1==mid+1) E$8GXo00v
data[cur]=temp[i2++]; gDAA>U3|$
else if(i2>r) ].:S!QO
data[cur]=temp[i1++]; j g$%WAEb
else if(temp[i1] data[cur]=temp[i1++]; NSM-p.I9
else V=E9*$b]
data[cur]=temp[i2++]; #a}fI
} o{zo-:>Jp
} {I(Euk>lR
K6|*-Wo.
} 'lIT7MK
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改进后的归并排序: N],A&}30
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package org.rut.util.algorithm.support; q[dls_
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import org.rut.util.algorithm.SortUtil; w6#hsRq[C
8 kd
/** ^>k[T.
* @author treeroot wU+ofj; +I
* @since 2006-2-2 m_(+-G
* @version 1.0 WW==
*/ =xa`)#4(
public class ImprovedMergeSort implements SortUtil.Sort { \[Rh\v&
c&F"tLl
private static final int THRESHOLD = 10; >@y5R^B`
>`s2s@Mx
/* S ._9
* (non-Javadoc) c9f~^}jNb
* $&lS7}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h'kgL~+$
*/ #^Sd r-
public void sort(int[] data) { :ykQ[d`:|
int[] temp=new int[data.length]; YSv\T '3
mergeSort(data,temp,0,data.length-1); B6=8cf"i
} C=9|K`g5 R
n*bbmG1
private void mergeSort(int[] data, int[] temp, int l, int r) { KvktC|~?
int i, j, k; GH^i,88
int mid = (l + r) / 2; PTL52+}/
if (l == r) X3RpJ#m"'
return; D!)'c(b
if ((mid - l) >= THRESHOLD) FV:{lC{h~
mergeSort(data, temp, l, mid); HOu<,9?>Q
else j:]/AReOL
insertSort(data, l, mid - l + 1); yrkd#m
if ((r - mid) > THRESHOLD) +2C:]
mergeSort(data, temp, mid + 1, r); e2/&X;2
else h r t\
insertSort(data, mid + 1, r - mid); 3-LO
#sNa}292"
for (i = l; i <= mid; i++) { $WTu7lVV[1
temp = data; 0W]Wu[k
} d [K56wbpx
for (j = 1; j <= r - mid; j++) { 9[$g;}w
temp[r - j + 1] = data[j + mid]; Kw925@W
} PO |p53
int a = temp[l]; m}F1sRkdQ
int b = temp[r]; @c7 On)sy
for (i = l, j = r, k = l; k <= r; k++) { ##R]$-<4dQ
if (a < b) { G^ n|9)CVW
data[k] = temp[i++]; "o[\Aec:
a = temp; .;*0odxv
} else { i,* DWD+
data[k] = temp[j--]; #lV&U
b = temp[j]; m,)Re8W-
} (Dc dR:/=
} N}.h_~6
} p3sz32RX
a>""MC2
/** HykJ}ezX4
* @param data B`T9dL[E4
* @param l [f- #pew
* @param i Cn+TcdHX
*/ c;(}Ih(#
private void insertSort(int[] data, int start, int len) { ;k!Ej-(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rQ~%SUM7
} 63F0Za}h
} SM0=
} uQpV1o5iA
} _Se>X=
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堆排序： q]'VVlP)
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package org.rut.util.algorithm.support; &=_YL
)[%#HT
import org.rut.util.algorithm.SortUtil; 9)H~I/9Y
:@YZ6?hf
/** i,b>&V/Y$
* @author treeroot #(XP=PUj
* @since 2006-2-2 3MkF
* @version 1.0 ?i9LqHL
*/ zb:p,T@5
public class HeapSort implements SortUtil.Sort{ @GjWeOj]
p/SJt0
/* (non-Javadoc) Q,)G_lO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q#MAA_
*/ }ZR3
public void sort(int[] data) { gzl_ "j
MaxHeap h=new MaxHeap(); 5n?fZ?6(
h.init(data); 6;5}% B:#h
for(int i=0;i h.remove(); xr.fZMOh4
System.arraycopy(h.queue,1,data,0,data.length); }bjTb!
} .5_w^4`b
7\5 [lM
private static class MaxHeap{ Pu}r` E_
#!Kg?BR2
void init(int[] data){ b"{7f
this.queue=new int[data.length+1]; Uv5E$Y"e10
for(int i=0;i queue[++size]=data; !U=;e?o
fixUp(size); &({X9
} ihs@ 'jh
} 6VCw>x
vgsu~(L;
private int size=0; IvH0sS`F
MPNBA1s
private int[] queue; bha_bj
~Dgui/r9J
public int get() { Sh{odrMj*
return queue[1]; |)GE7y0Q
} P+oCcYp
]NsbV
public void remove() { s)&"ga
SortUtil.swap(queue,1,size--); +| Cvv]Tx1
fixDown(1); ioh_5 5e
} 0'aZ*ozk
file://fixdown uXtfP?3Vy
private void fixDown(int k) { =C5[75z#+
int j; h:j-Xd$H+
while ((j = k << 1) <= size) { nD E5A
if (j < size %26amp;%26amp; queue[j] j++; T>W(Caelq
if (queue[k]>queue[j]) file://不用交换 tAYu|\]
break; hb^e2@i;Oq
SortUtil.swap(queue,j,k); @HaWd3
k = j; 2u#{K9g
} +O9l@X$l=
} X @r5^A[9
private void fixUp(int k) { QWfwoe&;R:
while (k > 1) { rpy`Wz/[
int j = k >> 1; I"Y?vj9]
if (queue[j]>queue[k]) A}[Lk#|n
break; /kNr5s
SortUtil.swap(queue,j,k); aD0w82s]J
k = j; ka"jv"z
} g/JAr<
} -+?0|>Nh
qH"0?<$9
} Ntg#-_]
0^{zq|%Q!
} M!mTNIj8~
A5 8i}G9
SortUtil： z?FZu,h}
`p'L3u5H-
package org.rut.util.algorithm; Y5Ey%Mm6
M>1V3sM
import org.rut.util.algorithm.support.BubbleSort; b%T-nY2
import org.rut.util.algorithm.support.HeapSort; kZf7
import org.rut.util.algorithm.support.ImprovedMergeSort; ?CM,k0
import org.rut.util.algorithm.support.ImprovedQuickSort; uK): d&]Ux
import org.rut.util.algorithm.support.InsertSort; }1Wo#b+
import org.rut.util.algorithm.support.MergeSort; a?Q~C<k
import org.rut.util.algorithm.support.QuickSort; $?I^Dk
import org.rut.util.algorithm.support.SelectionSort; YQe @C
import org.rut.util.algorithm.support.ShellSort; LOe!qt\&
`M"b L|[R
/** "eGS~-DVK
* @author treeroot p72+:I
* @since 2006-2-2 WV?iYX!
* @version 1.0 c( gUH
*/ "ve?7&G7U
public class SortUtil { -7;RPHJs
public final static int INSERT = 1; rPr#V1}1a
public final static int BUBBLE = 2; rA{h/T"
public final static int SELECTION = 3; _czLKbcF
public final static int SHELL = 4; 4#4kfGoT
public final static int QUICK = 5; OM2|c}]ZQ
public final static int IMPROVED_QUICK = 6; uyAhN
public final static int MERGE = 7; cS{l2}E
public final static int IMPROVED_MERGE = 8; iHQFieZ.E
public final static int HEAP = 9; @yobT,DXi
XTHrf'BU
public static void sort(int[] data) { 'KyT]OObS
sort(data, IMPROVED_QUICK); |oO0%#1H
} $m{\<A
private static String[] name={ Wpj.G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nc@ul')
}; x-Xb4?{
8>O'_6Joj
private static Sort[] impl=new Sort[]{ C|z`hNp
new InsertSort(), ^JYR^X>_
new BubbleSort(), t}NxD`8
new SelectionSort(), & }k=V4L
new ShellSort(), l\MiG Na
new QuickSort(), Rra(/j<rQ
new ImprovedQuickSort(), )?Jj#HtW
new MergeSort(), /?2yo{Fg
new ImprovedMergeSort(), REFisH-
new HeapSort() ls#O0
}; (Grj_p6O
V@cRJ3ZF
public static String toString(int algorithm){ mb\vHu*53
return name[algorithm-1]; *Q51'?y
} Z(U&0GH`
y"7TO#
public static void sort(int[] data, int algorithm) { G++kUo<
impl[algorithm-1].sort(data); B}r@xz
} D.$EvUSK<.
Xb|hP
public static interface Sort { <|.S~HLTQ
public void sort(int[] data); @LwhQ
} sM~CP zMa
+R#*eo;o7
public static void swap(int[] data, int i, int j) { hRc\&+#/
int temp = data; 2LD4f[a;
data = data[j]; r!Mr\
data[j] = temp; Q9W*)gBvn
} UP,0`fh(y
} T_YN^za(q