[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; 7JHS8C<]
} Kk_h&by?
int i1=l; }MV=I$S2U
int i2=mid+1; ' 5%`[&
for(int cur=l;cur<=r;cur++){ 8}(ul
if(i1==mid+1) s/J/kKj*s
data[cur]=temp[i2++]; dT*8I0\+
else if(i2>r) h1 (MvEt
data[cur]=temp[i1++]; #-Ad0/
else if(temp[i1] data[cur]=temp[i1++]; 8QNd t
else 9 ?~Y
data[cur]=temp[i2++]; iu(+ N~
} #J<IHNRt
} nfbqJ
/)E'%/"A
} duk:: |{F
KGoHn6jM
改进后的归并排序: l`A4)8Y@
Lb} cjI:
package org.rut.util.algorithm.support; 4]/i0\Vbam
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import org.rut.util.algorithm.SortUtil; =ap6IVR
|U4t 8
/** I{0bsTp;
* @author treeroot 9x40
* @since 2006-2-2 c@1q8,
* @version 1.0 @ dF]X
*/ g2'Q)w
public class ImprovedMergeSort implements SortUtil.Sort { t[-0/-4
HAr_z@#E
private static final int THRESHOLD = 10; }.R].4gT
(&a<6k
/* WgK|r~
* (non-Javadoc) QP?Deltp
* $=-Q]ld&]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ']]&<B}mz
*/ GXE6=BO
public void sort(int[] data) { @\UoZv(
int[] temp=new int[data.length]; >)IXc<"wq
mergeSort(data,temp,0,data.length-1); f YuM`O
} 4: <=%d
0fd\R_"d.
private void mergeSort(int[] data, int[] temp, int l, int r) { 66+y@l1
int i, j, k; t9Nu4yl
int mid = (l + r) / 2; *(4TasQu
if (l == r) Y/1,%8n
return; o-D,K dY
if ((mid - l) >= THRESHOLD) n_Ka+Y<
mergeSort(data, temp, l, mid); ?98]\pI
else GK/Q]}Q8pZ
insertSort(data, l, mid - l + 1); r4D6I,
if ((r - mid) > THRESHOLD) pM i w9}
mergeSort(data, temp, mid + 1, r); F}lgy;=h
else Twj?SV
insertSort(data, mid + 1, r - mid); M5Twulz/w
'C9H6)Zq)
for (i = l; i <= mid; i++) { oYG].PC
temp = data; ;|Z;YK@20
} Q&9%XF uM
for (j = 1; j <= r - mid; j++) { >Lo!8Hen
temp[r - j + 1] = data[j + mid]; dWI.t1`i
} $.z~bmH"D
int a = temp[l]; +HK)A%QI
int b = temp[r]; yeCR{{B/'
for (i = l, j = r, k = l; k <= r; k++) { <9s=K\-
if (a < b) { f2#9E+IQ
data[k] = temp[i++]; R "&(Ae?LR
a = temp; /Lc= K<
} else { O&:0mpRZ
data[k] = temp[j--]; VhAZncw
b = temp[j]; P~+?:buqc
} _uO#0 )l
} /I'n]
} ; YaR|)B
}bv0~}G4
/** 7\ <4LX
* @param data 1x07ua@(v
* @param l .=>T yq
* @param i P'Fy,fNg
*/ hao0_9q+
private void insertSort(int[] data, int start, int len) { 8O]U&A@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4nhe *ip
} #&1Y!kbdd
} LaE;{jY
} vl@t4\@3
} 1]@}+H
9@yP;{Q
堆排序： p0.?R
n(Up?_
package org.rut.util.algorithm.support; $l&&y?()
~?}/L'q!b
import org.rut.util.algorithm.SortUtil; xX'Uq_Jv
ndm19M8Y|
/** I_yIVw;
* @author treeroot r<oI4px
* @since 2006-2-2 L-d8bA
* @version 1.0 c=2e?
*/ *x| <\_+
public class HeapSort implements SortUtil.Sort{ L!L/QG|wdf
DJE/u qE
/* (non-Javadoc) a{h(BI^~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #^Dc:1,
*/ SPV'0* Z
public void sort(int[] data) { j8os6I
MaxHeap h=new MaxHeap(); Ar sMqb
h.init(data); 34C ^vBp
for(int i=0;i h.remove(); LIH>IpamN
System.arraycopy(h.queue,1,data,0,data.length); J1<fE(X
} %6<Pt
O#7ldF(
private static class MaxHeap{ 2t { Cpw
s8|#sHT
void init(int[] data){ A*pihBo7
this.queue=new int[data.length+1]; 2H<?
for(int i=0;i queue[++size]=data; Xh]\q)
fixUp(size); b,a\`%m}
} ^+[o+
} 2vnzB8"k
FGx_qBG4|
private int size=0; LM'` U-/e$
+29;T0>a
private int[] queue; T , =ga
P&aH6*p1
public int get() { >*}qGk
return queue[1]; 3i(k6)H$4
} L1QQU
]@J}f}Mjo
public void remove() { @`.u"@
SortUtil.swap(queue,1,size--); 9L#B"lh
fixDown(1); [Pp#l*
} !E_uQ?/w]Z
file://fixdown z K8#gif@
private void fixDown(int k) { ~DZ;l/&Mz7
int j; UKK}$B
while ((j = k << 1) <= size) { M{kPEl&Z
if (j < size %26amp;%26amp; queue[j] j++; 6sy%KO*A
if (queue[k]>queue[j]) file://不用交换 F'CUkVC0~P
break; t=\V&,
SortUtil.swap(queue,j,k); wHZ!t,g
k = j; R~*Y@_oD
} r-YQsu&
} Vd<= y
private void fixUp(int k) { xN"KSQpu
while (k > 1) { \Di~DN1
int j = k >> 1; pjj 5
if (queue[j]>queue[k]) G^mk<pH
break; 'v|2}T*
SortUtil.swap(queue,j,k); $fKwJFr
k = j; Mty]LMK
} GvzPT2E!
} 8)POEY4
3n:<oOV
} cHsJQU*K6
h/TPd]
} Bh' vr3|
f!$J_dz
SortUtil： >qF KXzI
sf*SxdoZU
package org.rut.util.algorithm; [!R%yD;
wCt+{Y3T
import org.rut.util.algorithm.support.BubbleSort; 4\OELU
import org.rut.util.algorithm.support.HeapSort; Ok`U*j
import org.rut.util.algorithm.support.ImprovedMergeSort; )vU{JY;
import org.rut.util.algorithm.support.ImprovedQuickSort; "}HQ)54&
import org.rut.util.algorithm.support.InsertSort; _Mt:^H}Sy
import org.rut.util.algorithm.support.MergeSort; )ql?}
import org.rut.util.algorithm.support.QuickSort; #6H<JB
import org.rut.util.algorithm.support.SelectionSort; <Ab:yD`K!
import org.rut.util.algorithm.support.ShellSort; (Z"Xp{u
~$\j$/A8/
/** 1UM]$$:i
* @author treeroot .V.N^8(:a
* @since 2006-2-2 dY-a,ch"8p
* @version 1.0 {hg$?4IyQ
*/ c&Zm>Qo[
public class SortUtil { g?$9~/h :;
public final static int INSERT = 1; }"&(sYQ*`
public final static int BUBBLE = 2; Ro1' L1:
public final static int SELECTION = 3; !F<?he<U
public final static int SHELL = 4; Awh"SUOh0
public final static int QUICK = 5; ai`:HhE
public final static int IMPROVED_QUICK = 6; &vF"I'V
public final static int MERGE = 7; )(L&+DDy
public final static int IMPROVED_MERGE = 8; <@vE3v;
public final static int HEAP = 9; 8S02 3
`2fuV]FW
public static void sort(int[] data) { E7h}0DX
sort(data, IMPROVED_QUICK); wKeqR$
} &"kx(B
private static String[] name={ 0 j.Sb2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JZXc1R| 9
}; Ksp;bfe
" }ZD)7K
private static Sort[] impl=new Sort[]{ !>:tF,fcB
new InsertSort(), =5|5j!i=q
new BubbleSort(), *(scSC>
new SelectionSort(), ]Cz16e&=2
new ShellSort(), aBI]' D;
new QuickSort(), >Qx#2x+
new ImprovedQuickSort(), 2>!ykUw^O
new MergeSort(), XGoy#h
new ImprovedMergeSort(), zc1Zuco| R
new HeapSort() 6+u'Tcb
}; d$TW](Bby
~JNuy"8
public static String toString(int algorithm){ `?@7 KEl>
return name[algorithm-1]; h^0mjdSp,
} 4AM*KI
!qpu /
public static void sort(int[] data, int algorithm) { P8VU&b\
impl[algorithm-1].sort(data); `l+SJLyJ%
} Zb}PP;O
g7P1]CZ}
public static interface Sort { |:#mw1
public void sort(int[] data); E nvs[YZe
} fA8+SaXW%
Fq9[:
public static void swap(int[] data, int i, int j) { 9vbh5xX
int temp = data; 7xc<vl#:q7
data = data[j]; u .2sB6}
data[j] = temp; W$JA4O>b
} 'MUrszOO.e
} qc6IH9i`