[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; _b|mSo,{Y
} #{KYsDtvx
int i1=l; |fqYMhA U
int i2=mid+1; 2%P{fJbwd
for(int cur=l;cur<=r;cur++){ A?V}$PTlx
if(i1==mid+1) 6U~AKq"+f
data[cur]=temp[i2++]; 67/JsL
else if(i2>r) AGu#*,K
data[cur]=temp[i1++]; Z> Jm
else if(temp[i1] data[cur]=temp[i1++]; djJD'JL
else ?_)b[-N!
data[cur]=temp[i2++]; V,:^@ 7d
} HO[W2b
} 7niZ`doBA
YbAa@Sq@
} ._'AJhU$0
N~NUBEKcp
改进后的归并排序: 'kU5
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package org.rut.util.algorithm.support; 3{c6)vR2
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import org.rut.util.algorithm.SortUtil; `%S 35x9
-wr#.8rzTT
/** "3Y(uN
* @author treeroot wr);+.T9R
* @since 2006-2-2 ]M3V]m
* @version 1.0 y buKwZFC
*/ 7p1f*N[X
public class ImprovedMergeSort implements SortUtil.Sort { kIl!n
Gbj^oo
private static final int THRESHOLD = 10; vYl2_\,Y?
}fC=
/* RTC;Wj
* (non-Javadoc) <c'0-=
* .cks){\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `>ppDQaS)W
*/ H!SFSgAu
public void sort(int[] data) { -t#YL
int[] temp=new int[data.length]; *G rYB6MT
mergeSort(data,temp,0,data.length-1); V[DiN~H
} B|WM;Y^
hp|.hN(kS]
private void mergeSort(int[] data, int[] temp, int l, int r) { ;Aqj$ x
int i, j, k; >lPWji'4;
int mid = (l + r) / 2; (8"advc6
if (l == r) s#Ayl]8r
return; p"@[2hK
if ((mid - l) >= THRESHOLD) /EP RgRX
mergeSort(data, temp, l, mid); *Aqd["q
else L(RI4d
insertSort(data, l, mid - l + 1); ' % d-
if ((r - mid) > THRESHOLD) ~fnu;'fN
mergeSort(data, temp, mid + 1, r); N 2XL5<
else =D~>$Y
insertSort(data, mid + 1, r - mid); <n1panS
7l(GBr
for (i = l; i <= mid; i++) { Rf4}((y7Y\
temp = data; XoNBq9Iu
} IL>VH`D
for (j = 1; j <= r - mid; j++) { 8 $qj&2 N
temp[r - j + 1] = data[j + mid]; xeNj@\jdC5
} NHaY&\
int a = temp[l]; G)8v~=Bv
int b = temp[r]; T W#s)iDi
for (i = l, j = r, k = l; k <= r; k++) { `!(IQ&
if (a < b) { J?#Xy9dz
data[k] = temp[i++]; 0SjB&J
a = temp; 9%Eo<+myh
} else { %_@T'!]
data[k] = temp[j--]; c7~'GXxQ2
b = temp[j]; -I?8\
} xmNs%
} V O\g"Yc
} sOJXloeO[6
Fy 1- >~
/** &+5ij;AD
* @param data QYg V[\&
* @param l C4aAPkcp2$
* @param i lrjVD(R=g
*/ :%-w/QwTR
private void insertSort(int[] data, int start, int len) { ~pT1,1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }el7@Gv
} Xj9\:M-
} a[_IG-l|i4
} ${)oi:K@:
} {E[t(Ig
s*Nb=v.e9
堆排序： bj6;>Ezp3(
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package org.rut.util.algorithm.support; 2@N9Zk{{J
ZsNZ3;d@u(
import org.rut.util.algorithm.SortUtil; ZEK,Z['
h% eGtd$n
/** ?W>`skQ
* @author treeroot }K^v Ujl
* @since 2006-2-2 IeZ9 "o h
* @version 1.0 A$M8w9
*/ OdbXna
public class HeapSort implements SortUtil.Sort{ ff;~k?L
P;`Awp?
/* (non-Javadoc) jF-:e;-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9}wI@
*/ 43 vF(<r&f
public void sort(int[] data) { ..kFn!5(g
MaxHeap h=new MaxHeap(); +MZI\>
h.init(data); D;&\)
for(int i=0;i h.remove(); G^sx/H76J
System.arraycopy(h.queue,1,data,0,data.length); Xs{PAS0
} _7z]zy@PC5
{O:{F?
private static class MaxHeap{ aGd wuD
j1;<3)%0
void init(int[] data){ DRpFEWsm
this.queue=new int[data.length+1]; >F>VlRg
for(int i=0;i queue[++size]=data; km*Y#`{
fixUp(size); hVz] wKP
} "O'c.v?{x
} kY?tUpM!TB
.{t*v6(TP
private int size=0; :>iN#)S
Z3yy(D>*
private int[] queue; UEx13!iFo
1>uAVPa
public int get() { -g."{|
return queue[1]; TQu.jC
} =w* 8
=;4K5l{c
public void remove() { 1c{m rsB
SortUtil.swap(queue,1,size--); }N}Js*
fixDown(1); 74ho=
} U)xebU.!S
file://fixdown }hsNsQ
private void fixDown(int k) { DZ @B9<Zz{
int j; $KQ q~|
while ((j = k << 1) <= size) { YKz#,
if (j < size %26amp;%26amp; queue[j] j++; 9%Tqk"x?
if (queue[k]>queue[j]) file://不用交换 Zs]n0iwM'@
break; {sf ,(.W
SortUtil.swap(queue,j,k); HUMy\u84H
k = j; gV-*z}`U
} q1q9W@H
} gs3c1Qa3b
private void fixUp(int k) { pSbtm74
while (k > 1) { fgs@oaoZ
int j = k >> 1; ? )h8uf4
if (queue[j]>queue[k]) Yn[>Y)
break; (uDAdE5
SortUtil.swap(queue,j,k); {_-T!yb
k = j; &l0K~7)b
} _|4R^*/4
} /@|iI<|
UWnF2,<s;
} /7])]vZ_
Ka6u*:/
} I`(53LCqo
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SortUtil： (6B;
%.hJDX\j
package org.rut.util.algorithm; up+0-!AH
dOKp:|9G
import org.rut.util.algorithm.support.BubbleSort; <{k`K[)
import org.rut.util.algorithm.support.HeapSort; ZG0^O"B0
import org.rut.util.algorithm.support.ImprovedMergeSort; 6}m`_d?
import org.rut.util.algorithm.support.ImprovedQuickSort; =^GPQ_"
import org.rut.util.algorithm.support.InsertSort; z\oTuW*B
import org.rut.util.algorithm.support.MergeSort; =}%#j0a4
import org.rut.util.algorithm.support.QuickSort; "9r$*\wOf
import org.rut.util.algorithm.support.SelectionSort; nShXY6bA
import org.rut.util.algorithm.support.ShellSort; pbEWnx_
g<(!>:h
/** 0VcHz$ 6
* @author treeroot "b~C/-W I
* @since 2006-2-2 }A+ncabm
* @version 1.0 "T_9_6tH
*/ a7c`[
public class SortUtil { /='0W3+o*L
public final static int INSERT = 1; pHoHngyi&
public final static int BUBBLE = 2; >t.Lc.
public final static int SELECTION = 3; {?`7D:]`^
public final static int SHELL = 4; =y-yHRC7
public final static int QUICK = 5; .SjJG67OyA
public final static int IMPROVED_QUICK = 6; u.|%@
public final static int MERGE = 7; \wD/TLS}
public final static int IMPROVED_MERGE = 8; CV\^gTPmx
public final static int HEAP = 9; EYn?YiVFU
; ?f+
public static void sort(int[] data) { I]`RvT
sort(data, IMPROVED_QUICK); |YsR;=6wT
} :P}3cl_
private static String[] name={ :Rb\Ca
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j&,Gv@
}; {N>ju
`@ YV
private static Sort[] impl=new Sort[]{ sBB[u'h!
new InsertSort(), ?tY+P`S
new BubbleSort(), u&#>)h
new SelectionSort(), ']TWWwj$
new ShellSort(), P4q5#r
new QuickSort(), u+Ix''Fn#%
new ImprovedQuickSort(), dkz% Y]
new MergeSort(), uUg;v/:
new ImprovedMergeSort(), tu<<pR>
new HeapSort() (ne[a2%>
}; a51e~mg Z`
!Pw*p*z
public static String toString(int algorithm){ |J,zU6t
return name[algorithm-1]; aSvv(iV
} !Ztqh Xr
_]OY[&R
public static void sort(int[] data, int algorithm) { QZ l#^-on
impl[algorithm-1].sort(data); tO{{ci$-T
} !h4T3sO
:c~SH/qS
public static interface Sort { TL2E|@k1]
public void sort(int[] data); @>Yd6C
} R1X'}#mU
.*x:
public static void swap(int[] data, int i, int j) { w[ v{)
int temp = data; 9^W7i]-Z
data = data[j]; S[exnZ*Y
data[j] = temp; -DdHl8
} *sOb I(&
} T4]2R