[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; 9`*ST(0/
} `D77CC]vU
int i1=l; j,j|'7J%
int i2=mid+1; "TA0--6
for(int cur=l;cur<=r;cur++){ LaQ7A,]
if(i1==mid+1) h+W$\T)
data[cur]=temp[i2++]; 'f6H#V*C
else if(i2>r) @[g7\d
data[cur]=temp[i1++]; 3jAr"xc
else if(temp[i1] data[cur]=temp[i1++]; O t)}:oG
else &4:R(]|
data[cur]=temp[i2++]; M(a%Qk?]/
} 3mHzOs\jU
} lOt7ij(,L
e-rlk5k%f
} MZV$YD^S
x4* bhiu
改进后的归并排序: +.!D>U$)}
a$=~1@
package org.rut.util.algorithm.support; @s1T|}AJ
6M >@DRZ'|
import org.rut.util.algorithm.SortUtil; =^KgNQ
|6Q5bV
/** 8* A%k1+
* @author treeroot v@=qVwX
* @since 2006-2-2 @-sWXz*W
* @version 1.0 ,>-jZtm
*/ !h.hJt
public class ImprovedMergeSort implements SortUtil.Sort { HV~Fe!J_
xxur4@p!
private static final int THRESHOLD = 10; 8oJl ]
[#Qf#T%5h
/* ;U=b6xE
* (non-Javadoc) G[>NP#P
* u+j\PWOtm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "9_$7.q<y
*/ 3:iEt (iCI
public void sort(int[] data) { S"&Gutu3o
int[] temp=new int[data.length]; >`AK'K8{M
mergeSort(data,temp,0,data.length-1); ~2Wus8X-
} #Nh'1@@
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private void mergeSort(int[] data, int[] temp, int l, int r) { w1tM !4r
int i, j, k; zP44 Xhz
int mid = (l + r) / 2; G%I .u
if (l == r) 5mZ2CDV
return; TLsF c^X
if ((mid - l) >= THRESHOLD) {5Bj*m5
mergeSort(data, temp, l, mid); q}t]lD %C
else GTR*3,rw
insertSort(data, l, mid - l + 1); h[>pC"s?K
if ((r - mid) > THRESHOLD) KA?}o^-F
mergeSort(data, temp, mid + 1, r); yP{ 52%|+
else !Aj}sh{
insertSort(data, mid + 1, r - mid); >Hnm.?-AWl
Uoe{,4T
for (i = l; i <= mid; i++) { y^C5_w(^jZ
temp = data; ~]-n%J$q
} ~LS</_N
for (j = 1; j <= r - mid; j++) { r &.~ {
temp[r - j + 1] = data[j + mid]; JN/=x2n.
} UfX~GC;B
int a = temp[l]; zcP=+Y)YA
int b = temp[r]; c]uieig0~
for (i = l, j = r, k = l; k <= r; k++) { tpGT~Y(
if (a < b) { ye.6tlW
data[k] = temp[i++]; oks;G([
a = temp; @%,~5{Ir
} else { on7 n4
data[k] = temp[j--]; v":q_w<k
b = temp[j]; :6Nb,Hh~
} 1%v6d !
} |<u+Xi ~
} %'1iT!g8
KM;H '~PZi
/** 0I.KHIBk
* @param data %j\&}>P4$
* @param l ui>jJ(
* @param i Kzrd<h]`)
*/ uP* kvi:e
private void insertSort(int[] data, int start, int len) { 1O`V_d)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Po)U!5Tm
} ;0Z-
} j1;[6XG
} ` Tap0V
} tBGLEeL/.
v/ N[)<
堆排序： K80f_iT5
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package org.rut.util.algorithm.support; ;8^k=8
H1c8]}
import org.rut.util.algorithm.SortUtil; R$awo/'^
Ss%Cf6qdWL
/** g)#?$OhP"
* @author treeroot dM;\)jm
* @since 2006-2-2 oE+P=
* @version 1.0 AAQ!8!
*/ U,WMP<5&
public class HeapSort implements SortUtil.Sort{ ^UKAD'_#%O
684& H8
/* (non-Javadoc) _]zX W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tM]Gu?6
*/ 0;l~B
public void sort(int[] data) { h}a}HabA
MaxHeap h=new MaxHeap(); mFTuqujO
h.init(data); "<=4]Z
for(int i=0;i h.remove(); 59zWB,y(P
System.arraycopy(h.queue,1,data,0,data.length); a=}1`Q
} uLzE'ZmV
JPZp*5c6A
private static class MaxHeap{ iHhdoY[]
nook/7]
void init(int[] data){ :k_&Zd j,B
this.queue=new int[data.length+1]; JH\:9B+:L
for(int i=0;i queue[++size]=data; Hl}lxK,]
fixUp(size); :f[ w
} eE'P)^KV
} _O}m0c
2"G9?)d9
private int size=0; { YQS fk
r2SZC`Z}-M
private int[] queue; {Phq39g
2VY7?1Ab(@
public int get() { <q=Zg7zB
return queue[1]; `/[5/%
} :"Xnu%1
[QxP9EC
public void remove() { )!-gT
SortUtil.swap(queue,1,size--); ^0v3NG6
fixDown(1); W!<7OA g$
} C_N|o|dX
file://fixdown Z 01A~_
private void fixDown(int k) { H[hJUR+#
int j; %"v:x?d$$o
while ((j = k << 1) <= size) { Gl>\p
if (j < size %26amp;%26amp; queue[j] j++; D`@a*YIq
if (queue[k]>queue[j]) file://不用交换 wKpBH}
break; Q$ew.h
SortUtil.swap(queue,j,k); N~flao^
k = j; Nqj@p<y/q
} 4 *}H3-`
} vCi`htm%
private void fixUp(int k) { / ]8e[t>!f
while (k > 1) { ?TpjU*Cxy
int j = k >> 1; 2FuV%\p
if (queue[j]>queue[k]) =W7-;&
break; gfK_g)'2U
SortUtil.swap(queue,j,k); +\Vw:~e
k = j; ~+1mH
} KfjWZ4{v
} _+48(QF<
ht%qjE
} w=XIpWl
!M8_PC*a
} he~8V.$
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SortUtil： fJ8>nOh
Q`*U U82!
package org.rut.util.algorithm; <5G(Y#s/?
)f$4:Pq
import org.rut.util.algorithm.support.BubbleSort; `F/R:!v
import org.rut.util.algorithm.support.HeapSort; E "=4(
import org.rut.util.algorithm.support.ImprovedMergeSort; +#,J`fV%
import org.rut.util.algorithm.support.ImprovedQuickSort; Z5TA4Q+Q
import org.rut.util.algorithm.support.InsertSort; Rf0so
import org.rut.util.algorithm.support.MergeSort; we_CF*zj
import org.rut.util.algorithm.support.QuickSort; ]AA|BeL?|
import org.rut.util.algorithm.support.SelectionSort; d2eXN3"
import org.rut.util.algorithm.support.ShellSort; XB!qPh.
C"kfxpCi
/** 6qDt6uB
* @author treeroot %!t9)pNc
* @since 2006-2-2 r5xm7- `c
* @version 1.0 X`_tm3HC
*/ 5[)5K?%
public class SortUtil { bK6^<,~
public final static int INSERT = 1; vk E]$4P[$
public final static int BUBBLE = 2; ].rKfv:
public final static int SELECTION = 3; 5 <k)tF%
public final static int SHELL = 4; w\i]z1
public final static int QUICK = 5; y]t19G+
public final static int IMPROVED_QUICK = 6; JRC2+BU /
public final static int MERGE = 7; w=fWW^>bP
public final static int IMPROVED_MERGE = 8; 2z{B
public final static int HEAP = 9; N4;g"k b
,j XK
public static void sort(int[] data) { O>~@>/#
sort(data, IMPROVED_QUICK); Q>4NUq
} 2&*#k
private static String[] name={ ]*=!lfrV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KH)-=IJ8
}; ?ja%*0 R
o*A, 6y
private static Sort[] impl=new Sort[]{ U+'zz#0qN
new InsertSort(), 0&)6mO
new BubbleSort(), Wi=zu[[qc
new SelectionSort(), mTsyVji8
new ShellSort(), k~AtnI
new QuickSort(), i ZPNss
new ImprovedQuickSort(), FbuWFC
new MergeSort(), <5%*"v
new ImprovedMergeSort(), 0V-jOc
new HeapSort() odca?
}; jR}EBaI}
Psf'^42(v
public static String toString(int algorithm){ c/88|k
return name[algorithm-1]; WYF8?1dt +
} tXA?[ S
\dU.#^ryp
public static void sort(int[] data, int algorithm) { 9IXy96]]6
impl[algorithm-1].sort(data); 8nBYP+t,e
} #Hr'plg 8
s:lH4B
public static interface Sort { y@v)kN)Y9\
public void sort(int[] data); {HY3E}YJL
} <ot`0
[*O>Lk
public static void swap(int[] data, int i, int j) { tJu:N'=Dy
int temp = data; m7NWgXJ
data = data[j]; c`x4."m
data[j] = temp; d#+Nef5
} \(7A7~
} o:v_I{