[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; <y2HzBC
} +5i~}Q!
int i1=l; 2L(\-]%f
int i2=mid+1; 7.y35y
for(int cur=l;cur<=r;cur++){ mDdL7I
if(i1==mid+1) n@te.,?A"
data[cur]=temp[i2++]; mMOjV_
else if(i2>r) F%ffnEJg
data[cur]=temp[i1++]; MXa(Oi2Gg
else if(temp[i1] data[cur]=temp[i1++]; j;yKL-ycB
else p>=i'~lQ6
data[cur]=temp[i2++]; V'^E'[Dd{
} /UG]hJ-wn
} vrq5 +K&||
uc>]-4
} w!|jL $5L
or qL0i
改进后的归并排序: uA[c$tBe
p#aB0H3
package org.rut.util.algorithm.support; zL!}YR@&u"
Z{}+7P
import org.rut.util.algorithm.SortUtil; evvv&$&
s+<`iH9Hm
/** K41Gn
* @author treeroot Dq[Z0"8
* @since 2006-2-2 N?s`a;Q[=
* @version 1.0 Whl^~$+f
*/ Wl0p-h
public class ImprovedMergeSort implements SortUtil.Sort { mJ>msI @
G0Y]-*1
private static final int THRESHOLD = 10; f\vMdY
V\nj7Gr:sF
/* 8pXqgIbmb
* (non-Javadoc) 7h#*djef
* tjg?zlj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XGb*LY+Db6
*/ x8!uI)#tS
public void sort(int[] data) { lj /IN[U/
int[] temp=new int[data.length]; GS&I6
mergeSort(data,temp,0,data.length-1); Q2Dh(
} _$KEE|9
^AF~k#R
private void mergeSort(int[] data, int[] temp, int l, int r) { (B0QBDj!
int i, j, k; 9]%2Yb8SC
int mid = (l + r) / 2; ~%L=<TBAc
if (l == r) tx7B?/5D
return; {BY(zsl
if ((mid - l) >= THRESHOLD) %n^ugm0B
mergeSort(data, temp, l, mid); *. 1S
else LeV";=_n
insertSort(data, l, mid - l + 1); 7/zaf
if ((r - mid) > THRESHOLD) @TJ2 |_s6]
mergeSort(data, temp, mid + 1, r); j6WDh}#
else \Mzr[dI
insertSort(data, mid + 1, r - mid); N4l}5(e
@|:yK|6O
for (i = l; i <= mid; i++) { muMd9\p
temp = data; qVssw* GDB
} 88KQ) NU
for (j = 1; j <= r - mid; j++) { ^c]c`w
temp[r - j + 1] = data[j + mid]; ?vP6~$*B
} "*LQr~k~}
int a = temp[l]; y!c<P,Lt3f
int b = temp[r]; '#a;n
for (i = l, j = r, k = l; k <= r; k++) { >dJ[1s]
if (a < b) { 1i&|}"
data[k] = temp[i++]; to;^'#B
a = temp; <+UJgB A-
} else { H8kB.D[7Q
data[k] = temp[j--]; pQi|PQq
b = temp[j]; .I0M'L~!/L
} 7Ue&y8Yf
} w7c0jIf{
} XS$#\UQ
:_|Xr'n`A
/** ojyP.R
* @param data d&lT/S
* @param l S$=caZ?
* @param i -/:!AxIH
*/ NiYT%K%
private void insertSort(int[] data, int start, int len) { 5<M$ XT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +;,X?E]g
} %\L{Ud%7
} 5+2qx)FZ
} :F_>`{
} '~VF*i^4
rZ&li/Z
堆排序： WRrg5&._q
z31g"
package org.rut.util.algorithm.support; nRyx2\Py+
yeam-8
import org.rut.util.algorithm.SortUtil; ,Jx.Kj.,
\opcn\vW
/** .X5A7 m
* @author treeroot F:sUGM,
* @since 2006-2-2 {e5-
* @version 1.0 A2!pbeG
*/ M8IU[Pz4
public class HeapSort implements SortUtil.Sort{ 8JXS:J.|v
#qARcxbK|
/* (non-Javadoc) _>bk'V7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TK0WfWch
*/ >)HKruSW.
public void sort(int[] data) { BMtk/r/
MaxHeap h=new MaxHeap(); X|yVRQ?F`
h.init(data); $b[Ha{9(v
for(int i=0;i h.remove(); R8 LHwRQ
System.arraycopy(h.queue,1,data,0,data.length); }:Y)DH%u
} yMD3h$w3a
CM6! 1 7
private static class MaxHeap{ [{>3"XJ'
FOteNQTj
void init(int[] data){ \t%iUZ$
this.queue=new int[data.length+1]; '#>Fe`[
for(int i=0;i queue[++size]=data; `.Zm}'
fixUp(size); 1,7 }ah_
} <rvM)EJv|
} hkRqtpYK
OdOn wY
private int size=0; /([a%,DI
^M\X/uq$E
private int[] queue; WM%w_,Z
#xfav19{.
public int get() { EnmMFxu<
return queue[1]; &-!$qUli
} G.$KP
fQ1Dp
public void remove() { I Bko"|e@
SortUtil.swap(queue,1,size--); pWn]$HaoG
fixDown(1); M& )yr^
} i(ZzE
file://fixdown HCx0'|J
private void fixDown(int k) { 8Zy*#[-
int j; 4l>U13~#
while ((j = k << 1) <= size) { Z|fi$2k0!
if (j < size %26amp;%26amp; queue[j] j++; 4TyzD%pOw
if (queue[k]>queue[j]) file://不用交换 {?q`9[Z
break; ^/cqE[V~,
SortUtil.swap(queue,j,k); .V\~#Ro$G
k = j; hi4-Z=pl
} &M tF
} [mj=m?j
private void fixUp(int k) { cB_9@0r[S
while (k > 1) { J@QOF+&
int j = k >> 1; DliDBArxZ
if (queue[j]>queue[k]) aHb&+/HZ
break; gvPHB+#A
SortUtil.swap(queue,j,k); S(^YTb7
k = j; &kn?=NW
} BS?i!Bm7
} 6pt|Crvu
R+!oPWfb
} Y;iI=U
] _W'-B
} B.KK@
CEBu[TT/9
SortUtil： O9m sPb:
zo("v*d*q
package org.rut.util.algorithm; I[b{*g2Zw
F/,6Jh
import org.rut.util.algorithm.support.BubbleSort; "kC6G%
import org.rut.util.algorithm.support.HeapSort; &ld<fa(w+2
import org.rut.util.algorithm.support.ImprovedMergeSort; :5'hd^Q
import org.rut.util.algorithm.support.ImprovedQuickSort; [k75+#'
import org.rut.util.algorithm.support.InsertSort; Qmb+%z
import org.rut.util.algorithm.support.MergeSort; ;JgSA&'e
import org.rut.util.algorithm.support.QuickSort; EQk omjv
import org.rut.util.algorithm.support.SelectionSort; 4sX?O4p
import org.rut.util.algorithm.support.ShellSort; a8v\H8@X
& P%#
/** j}K3YfH
* @author treeroot T!Tp:&O-
* @since 2006-2-2 (/Jy9=~
* @version 1.0 t=My=pG
*/ 1r*yYm'
public class SortUtil { s&+`>
public final static int INSERT = 1; q(WGvl^r
public final static int BUBBLE = 2; Lsai8 B
public final static int SELECTION = 3; .gNziDO
public final static int SHELL = 4; UtC<TBr
public final static int QUICK = 5; \So)g)K
public final static int IMPROVED_QUICK = 6; [O}D^qp
public final static int MERGE = 7; }'86hnW
public final static int IMPROVED_MERGE = 8; Z\]LG4N?
public final static int HEAP = 9; }eI9me@Aa
!)CY\c4}d>
public static void sort(int[] data) { |`kkmq
sort(data, IMPROVED_QUICK); MRZN4<}9
} t-n'I/^5
private static String[] name={ c6=XJvz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3]@wa!`
}; U3-MvI,Q
LOu9#w"
private static Sort[] impl=new Sort[]{ qT:`F
new InsertSort(), +?*.Emzl@
new BubbleSort(), J5O/c,?g
new SelectionSort(), '66nqJb*
new ShellSort(), QFN9j
new QuickSort(), M?;YpaSe+
new ImprovedQuickSort(), 90,UhNz9D
new MergeSort(), H3pZfdh?w
new ImprovedMergeSort(), g;OR{
new HeapSort() 44t;#6p@%>
}; b$pCp`/MT
lp5'-Jo
public static String toString(int algorithm){ 1}SON4U
return name[algorithm-1]; k_Sm ep
} 7q 5 \]J[
?)-anoFyVW
public static void sort(int[] data, int algorithm) { ?' mP`9I
impl[algorithm-1].sort(data); 69Z`mR
} j9w{=( MV
+W$uHQq
public static interface Sort { -UAMHd}4
public void sort(int[] data); <Wj/A/
} TEGg)\+D>
Tc>g+eS
public static void swap(int[] data, int i, int j) { 0,):;OI
int temp = data; jq_4x[
data = data[j]; jeO`45O
data[j] = temp; 0"N4WH O
} }5z!FXB
} F x$W3FIO]