[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; FZW:dsm
} r7=r~3)
int i1=l; BV`,~n:
int i2=mid+1; bcCCvV}6WZ
for(int cur=l;cur<=r;cur++){ H^\2,x Z
if(i1==mid+1) sHi*\
data[cur]=temp[i2++]; `OWw<6`k
else if(i2>r) U)g27*7
data[cur]=temp[i1++]; ;mYj`/Yj
else if(temp[i1] data[cur]=temp[i1++]; c _faW
else g<"k\qs7
data[cur]=temp[i2++]; e$+/;MRq
} qqR8E&Y{
} fR6.:7&
%juR6zB%8
} F4%vEn\!
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改进后的归并排序: ywS2`(
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package org.rut.util.algorithm.support; GDMg.w4Yk
<R>%DD=v^
import org.rut.util.algorithm.SortUtil; uh_2yw_
X_nxC6[m%
/** d#*n@@V4
* @author treeroot 4Ev#`i3~
* @since 2006-2-2 hR1n@/nh
* @version 1.0 @<W^/D1#L
*/ /K2=GLl;
public class ImprovedMergeSort implements SortUtil.Sort { !<P|:Oo*Dl
E6FT*}Q
private static final int THRESHOLD = 10; mtQlm5l
%oY=.Ok ]
/* Xzp!X({
* (non-Javadoc) vuCl(/P`
* *He%%pk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3.^Tm+ C
*/ '3MCb
public void sort(int[] data) { B}YpIb]d
int[] temp=new int[data.length]; ozr82
mergeSort(data,temp,0,data.length-1); T.{sO`
} 'QrvkQ
(,5,}
private void mergeSort(int[] data, int[] temp, int l, int r) { n,E=eNc
int i, j, k; dY'mY~Tv
int mid = (l + r) / 2; t@(`24
if (l == r) `0qBuE_^h
return; Pb(XR+
if ((mid - l) >= THRESHOLD) :Vyr8+]
mergeSort(data, temp, l, mid); kA1C&
else '"/Yk=EmlU
insertSort(data, l, mid - l + 1); XW*,Lo5>H\
if ((r - mid) > THRESHOLD) @\|W#,~
mergeSort(data, temp, mid + 1, r); )GpH5N'EI
else lwU$*?yv
insertSort(data, mid + 1, r - mid); xc HG5bg|
ojA i2uz
for (i = l; i <= mid; i++) { pDg_^|
temp = data; O0Vtvbj
} _FRwaFVJ3
for (j = 1; j <= r - mid; j++) { And|T 6u
temp[r - j + 1] = data[j + mid]; }>|M6.n "
} K3WhF
int a = temp[l]; }9qbF+b
int b = temp[r]; ?pAO?5Z:}
for (i = l, j = r, k = l; k <= r; k++) { Vif0z*\e{
if (a < b) { ;GgW&*|
data[k] = temp[i++]; EGKj1_ml
a = temp; aj71oki)
} else { GWU"zWli]z
data[k] = temp[j--]; W]t!I}yPR
b = temp[j]; cxNb!G
} ba-J-G@YW
} Snav)Hb'
} O&Ws*k
lOc!KZHUp
/** Y8^pgv
* @param data OZ/!=;
* @param l keBf^NY
* @param i A* =r~T5B
*/ aNLkkkJg<;
private void insertSort(int[] data, int start, int len) { >pVrY; P[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aq|R?
} #00k7y>OyD
} hpqM fz1
} Y}/e"mp
} 45u\v2,C3
Y)-)owx7
堆排序： .[1"3!T
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package org.rut.util.algorithm.support; l^@!,Z
Eep*,Cnt0
import org.rut.util.algorithm.SortUtil; eoC@b/F4
#ZPU.NNT?
/** )<kId4E
* @author treeroot ;-OnCLr
* @since 2006-2-2 hSO(s
* @version 1.0 0 tZ>yR
*/ WP@IV;i
public class HeapSort implements SortUtil.Sort{ t#Q" ;e
.!kO2/:6
/* (non-Javadoc) } +@H&}u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [`_ZlC
*/ JMUk=p<\
public void sort(int[] data) { B4<W%lm
MaxHeap h=new MaxHeap(); %4%$NdU"
h.init(data); [^cflmV
for(int i=0;i h.remove(); d=TZaVL$$
System.arraycopy(h.queue,1,data,0,data.length); x tJ_azt
} %|3I|'%Y
&!y7PWHJ
private static class MaxHeap{ :< )"G&
q]-CTx$
void init(int[] data){ j#C1+Us
this.queue=new int[data.length+1]; b&y"[1`
for(int i=0;i queue[++size]=data; DRBRs-D
fixUp(size); +0,{gDd+
} u]B15mT?
} =*AAXNs@3
y}fF<qih'>
private int size=0; yN0!uzdW*
AX Y.80+
private int[] queue; T4OH,^J
c\n&Z'vK
public int get() { V>{G$(v$
return queue[1]; Bc/'LI.%
} M<A*{@4$w&
X_7cwPY
public void remove() { Ag>E%N
SortUtil.swap(queue,1,size--); A?DgeSm
fixDown(1); &nc0stuL
} cmzu @zq
file://fixdown (|6Y1``
private void fixDown(int k) { LEq"g7YH
int j; W-QBC- 3
while ((j = k << 1) <= size) { Y1?"Ut
if (j < size %26amp;%26amp; queue[j] j++; /-#1ys#F=
if (queue[k]>queue[j]) file://不用交换 )w{bT]
break; ^lUV^%f
SortUtil.swap(queue,j,k); d,Fj|}S
k = j; !T((d7;
} 4>uy+"8PO
} 6N{Vcfq
private void fixUp(int k) { P <$)v5f
while (k > 1) { Wz}8O]#/.
int j = k >> 1; X}Ey6*D:
if (queue[j]>queue[k]) ~\4B 1n7
break; aKLA_-E
SortUtil.swap(queue,j,k); dFd^@b
k = j; D^?jLfW8
} `m~x*)L#
} _^)Wrf+
4@K9%
} 6I$laHx?
LP{{PT.&X
} 0Cox+QJt
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SortUtil： _f~(g1sE
j.3#rxq
package org.rut.util.algorithm; 7j>NUx=j3
?e`4 sf_~
import org.rut.util.algorithm.support.BubbleSort; )yV|vn
import org.rut.util.algorithm.support.HeapSort; 19Cs 3B\4
import org.rut.util.algorithm.support.ImprovedMergeSort; (RDY-~#~
import org.rut.util.algorithm.support.ImprovedQuickSort; B8jSdlvz
import org.rut.util.algorithm.support.InsertSort; N=>6PLie
import org.rut.util.algorithm.support.MergeSort; &=1Ag}l57
import org.rut.util.algorithm.support.QuickSort; s`j QX\{
import org.rut.util.algorithm.support.SelectionSort; 4(VVEe
import org.rut.util.algorithm.support.ShellSort; ho1Mo
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/** Z~g I)
* @author treeroot r'kUU]j9
* @since 2006-2-2 rjmKe*_1V
* @version 1.0 y:U'3G-
*/ oD$8(
public class SortUtil { LQ,RQ~!
public final static int INSERT = 1; dLtSa\2Hn
public final static int BUBBLE = 2; +E8Itb,
public final static int SELECTION = 3; 4"OUmh9LHB
public final static int SHELL = 4; E<[_L!2
public final static int QUICK = 5; -BY'E$]4
public final static int IMPROVED_QUICK = 6; bYuQ"K A$
public final static int MERGE = 7; 0_}^IiG
public final static int IMPROVED_MERGE = 8; }{! #`'s
public final static int HEAP = 9; 1v)X]nW
!]%M
public static void sort(int[] data) { tSST.o3
sort(data, IMPROVED_QUICK); C~do*rnM^
} p!+7F\
private static String[] name={ S?X2MX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qf/1a CQiP
}; +Zaew679
~R;9a"nr
private static Sort[] impl=new Sort[]{ AML8.wJ
new InsertSort(), 49)A.Bh&!
new BubbleSort(), @%4MFc0`!
new SelectionSort(), jpL'y1@Ut
new ShellSort(), $jt UQ1
new QuickSort(), ,BK6a'1J
new ImprovedQuickSort(), ;l^4/BR
new MergeSort(), ?;{fqeJz
new ImprovedMergeSort(), p*11aaIbp~
new HeapSort() :ZP4(}
}; [x{S ,?6
CaX0Jlk*
public static String toString(int algorithm){ e ~X<+3<
return name[algorithm-1]; UbBo#(TZ)
} GVFR^pzO
)$V&Nf
public static void sort(int[] data, int algorithm) { vepZod}D
impl[algorithm-1].sort(data); .g CC$
} x^UE4$oo
E$$pO.\
public static interface Sort { GZL{~7n
public void sort(int[] data); J`6X6YZ
} ~~U2Sr
?e? mg
public static void swap(int[] data, int i, int j) { .YvE
int temp = data; }yCw|B|a
data = data[j]; Km~\^(a '
data[j] = temp; 89I[Dg;"u
} 9Fe(],AzF
} ? x1"uH