[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; Z-~^)lo
} kP|!!N
int i1=l; aRV!0?fS
int i2=mid+1; |g9^]bT
for(int cur=l;cur<=r;cur++){ )/=J=xw2
if(i1==mid+1) Cz(PjS
data[cur]=temp[i2++]; PJ_|=bn
else if(i2>r) Vs"M Cqi
data[cur]=temp[i1++]; P_Zo}.{
else if(temp[i1] data[cur]=temp[i1++]; h(zi$V
else X31kHK5F_
data[cur]=temp[i2++]; "y`?KY$[N
} x0#+yP
} %Wc-.ER
EXzY4D ^
} PK~okz4b
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改进后的归并排序: K;Xn!:) V:
E6G^?k~q
package org.rut.util.algorithm.support; {7;TQ?/
:DZiDJ@
import org.rut.util.algorithm.SortUtil; Lf,gS*Tg?
68d@By
/** kj[[78
* @author treeroot {wm `
* @since 2006-2-2 ZzE&?
* @version 1.0 [C&c;YNp
*/ I/(`<s p
public class ImprovedMergeSort implements SortUtil.Sort { [R~HhM
ZWFH5#=
private static final int THRESHOLD = 10; J d`NS3;*p
Z86[sQBg
/* n1LS*-@
* (non-Javadoc) u|Ai<2b$
* }%}eyLm(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MRa>@Jn??A
*/ /2z2a-!r
public void sort(int[] data) { E^qKkl
int[] temp=new int[data.length]; }Jc^p
mergeSort(data,temp,0,data.length-1); CUtk4;^y#
} II2oV}7?
V2bod=&Lc
private void mergeSort(int[] data, int[] temp, int l, int r) { :4A^~+J
int i, j, k; qR1ez-#K
int mid = (l + r) / 2; I7TMv.
if (l == r) W}e5 4-lu
return; x^ Wgo`v)
if ((mid - l) >= THRESHOLD) ,p2 Di
mergeSort(data, temp, l, mid); duM>(y
else ,5/gNg
insertSort(data, l, mid - l + 1); \gzNMI*
if ((r - mid) > THRESHOLD) H@6
mergeSort(data, temp, mid + 1, r); eD/?$@y
else EEaFi8
insertSort(data, mid + 1, r - mid); |GsLcUv6
Rw7Q[I5z%
for (i = l; i <= mid; i++) { 4ASc`w*0
temp = data; Gh< r_O~L3
} W[vak F
for (j = 1; j <= r - mid; j++) { ~vt8|OOo0
temp[r - j + 1] = data[j + mid]; C{,nDa?|
} d9^h YS{
int a = temp[l]; CR_A{(
int b = temp[r]; 8<o(z'&y
for (i = l, j = r, k = l; k <= r; k++) { mT9TSW}
if (a < b) { R{WG>c
data[k] = temp[i++]; t &ucqY
a = temp; ^yfT7050
} else { ](O!6_'d
data[k] = temp[j--]; D4S>Pkv
b = temp[j]; %++q+pa
} QM$?}>:
} @U9ov >E
} m/{rmtA4
w,P2_xk`
/** :8rqTBa`
* @param data 'tdjPdw
* @param l >Qi2;t~G
* @param i N_T;&wibO
*/ )S5Q5"j&=f
private void insertSort(int[] data, int start, int len) { U2h?l `nP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LsmC/+7r$1
} 0)nU[CY
} dtnAMa5$T
} Y`_6Ny="
} @Pa ;h
@1kA%LLK
堆排序： >Rr]e`3wG
'91Ak,cWB
package org.rut.util.algorithm.support; Bkcs4 x
:0]KIybt
import org.rut.util.algorithm.SortUtil; X2EC+<
&<~`?-c
/** BO1Mz=q
* @author treeroot 8J>s|MZ
* @since 2006-2-2 .<tb*6rX>
* @version 1.0 PB`94W
*/ 6.k2,C4dT<
public class HeapSort implements SortUtil.Sort{ f-3lJ?6
}?H|9OS
/* (non-Javadoc) YUc&X^O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 76hi@7a
*/ :lcoSJ
public void sort(int[] data) { "eBpSV>nnQ
MaxHeap h=new MaxHeap(); Y(-+>>j_
h.init(data); tW 9vo-{+
for(int i=0;i h.remove(); /Jo*O=Lpo
System.arraycopy(h.queue,1,data,0,data.length); f):|Ad|
} ;ASlsUE\)
uRp-yu[nt%
private static class MaxHeap{ 7H=/FT?e]
z;Kyg}
void init(int[] data){ d^,u"Z9P
this.queue=new int[data.length+1]; _RAPXU~ 6-
for(int i=0;i queue[++size]=data; b&0q%tCK
fixUp(size); [t>}M6?R:
} 4Sw)IU~K(
} ['{mW4i
0Pbv7)=XL
private int size=0; /9i2@#J}W1
38rC; 6
private int[] queue; ?*Jv&f#
7=}`"7i~
public int get() { B1\}'g8%f
return queue[1]; g"F vD_
} IY+P Yad
+$P0&YaQ
public void remove() { hg |DpP
SortUtil.swap(queue,1,size--); 2y,f
fixDown(1); yv&&x.!.Z
} Fd0R?d
file://fixdown O$KLQ'0"n
private void fixDown(int k) { l+RBe<Mq
int j; (rvK@
while ((j = k << 1) <= size) { +1_NB;,e
if (j < size %26amp;%26amp; queue[j] j++; $(G.P!/
if (queue[k]>queue[j]) file://不用交换 EW|bs#l
break; QYDSE
SortUtil.swap(queue,j,k); 4y:yFTp
k = j; l(*`,-pv:
} gP?pfFhG
} a!]'S4JS
private void fixUp(int k) { :<!a.%=
while (k > 1) { +H8]5~',L%
int j = k >> 1; 8L^5bJ
if (queue[j]>queue[k]) (xy/:i".V
break; REli`"bR
SortUtil.swap(queue,j,k); yd'>Mw
k = j; 5hg:@i',
} ;3 O0O
} g>cp;co9g
=:uK$>[
} %;~Vc{Xxt/
n~@;[=o?5
} 5PqL#Eu`!
I^emH+!MW
SortUtil： I& DEF*
[}|x@ v9
package org.rut.util.algorithm; !Qy%sY
2h%/exeS;
import org.rut.util.algorithm.support.BubbleSort; w9G (^jS6
import org.rut.util.algorithm.support.HeapSort; pxDkf|*
import org.rut.util.algorithm.support.ImprovedMergeSort; Et}S*!IS
import org.rut.util.algorithm.support.ImprovedQuickSort; Se{}OG)
import org.rut.util.algorithm.support.InsertSort; `O5wM\Z
import org.rut.util.algorithm.support.MergeSort; [RoOc)u
import org.rut.util.algorithm.support.QuickSort; VG_ PBG(
import org.rut.util.algorithm.support.SelectionSort; AAb3Jf`UW
import org.rut.util.algorithm.support.ShellSort; & =)HPzC
(_ HwU/
/** ,( u-x!
* @author treeroot qs6r9?KP
* @since 2006-2-2 LhKaqR{
* @version 1.0 Nawph
*/ bbCH(fYbu
public class SortUtil { NO+.n)etGb
public final static int INSERT = 1; xf% _HMKc
public final static int BUBBLE = 2; uB_8P+h7
public final static int SELECTION = 3; H`d595<=i;
public final static int SHELL = 4; @y]ek/
public final static int QUICK = 5; VKqIFM1b
public final static int IMPROVED_QUICK = 6; #ueWU
public final static int MERGE = 7; Tr*3:J }
public final static int IMPROVED_MERGE = 8; ,1&Pb %}
public final static int HEAP = 9; Pqu]?X
> mk>VM
public static void sort(int[] data) { mSdByT+dG
sort(data, IMPROVED_QUICK); :#7"SEud}
} 6?i]oy^X]p
private static String[] name={ <n? cRk'.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '{*{
}; \MI2^JN
j*Uz.q?
private static Sort[] impl=new Sort[]{ 69N/_V
new InsertSort(), >xsbXQ>.
new BubbleSort(), 41Ga-0p
new SelectionSort(), o^+2%S`]
new ShellSort(), 2@~.FBby7@
new QuickSort(), !LJEo>D
new ImprovedQuickSort(), ua%@Ay1|
new MergeSort(), kD;1+lNz
new ImprovedMergeSort(), wIQ~a
new HeapSort() Cw$0XyO
}; n/9.;9b$I
1*U)\vK~
public static String toString(int algorithm){ UI2TW)^2
return name[algorithm-1]; /oL& <e
} pW5ch"HE
Z uFk}R"x
public static void sort(int[] data, int algorithm) { ?TWve)U
impl[algorithm-1].sort(data); *^aEUp6&
} h@AKfE!\~
!$n@-
public static interface Sort { /~~A2.=.
public void sort(int[] data); fVJlA
} 4|U$ON?x
O"^3,-
public static void swap(int[] data, int i, int j) { R.x^
int temp = data; Y=83r]%
data = data[j]; = y@*vl
data[j] = temp; RG&t0%yj}
} p>oC.[:4a
} #ME!G/