[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; "UGj4^1f
} =^y{@[p`(
int i1=l; Z !25xqNCd
int i2=mid+1; p6*a1^lU6
for(int cur=l;cur<=r;cur++){ p]z54 ~
if(i1==mid+1) /3Ix,7
data[cur]=temp[i2++]; DPQGh`J
else if(i2>r) MI'l4<>u
data[cur]=temp[i1++]; W<|K
else if(temp[i1] data[cur]=temp[i1++]; tO>OD#
else H9Q7({v
data[cur]=temp[i2++]; uf'P9MA}>
} >"g<-!p@
} 8~(+[[TQ@
>ydb?
} y{Y+2}Dv/
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改进后的归并排序: |z.GSI_!)
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package org.rut.util.algorithm.support; |\n)<r_
X#I`(iHY
import org.rut.util.algorithm.SortUtil; qL5#.bR
;AGs1j
/** 3k*:B~1
* @author treeroot U"y'Kd
* @since 2006-2-2 _7.GzQJ
* @version 1.0 |+xtFe
*/ ca3BJWY}J
public class ImprovedMergeSort implements SortUtil.Sort { yb{{ z@
GHC?Tp
private static final int THRESHOLD = 10; (<R\
|5B,cB_
/* p/WH#4Xdr
* (non-Javadoc) 8 ]06!7S}
* *tfDXQ^mN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b}&7~4zw
*/ 1;:t~Y
public void sort(int[] data) { nR@,ouB-$
int[] temp=new int[data.length]; gLSG:7m@
mergeSort(data,temp,0,data.length-1); d?&!y]RS#
} ?I2k6%a
7|M$W(P
private void mergeSort(int[] data, int[] temp, int l, int r) { ~? FrI
int i, j, k; 5Jhbf2-
int mid = (l + r) / 2; JdUz!=I
if (l == r) r5!x,{E6
return; g3~~"`2
if ((mid - l) >= THRESHOLD) lc3S|4
mergeSort(data, temp, l, mid); 3pTS@
else kV:FJx0xP
insertSort(data, l, mid - l + 1); ;Ma/b=Y
if ((r - mid) > THRESHOLD) F'>GN}n
mergeSort(data, temp, mid + 1, r); a j@C0
else T5dUJR2k$
insertSort(data, mid + 1, r - mid); $dZ>bXUw:
5}MlZp
for (i = l; i <= mid; i++) { ELrZ8&5G
temp = data; "gbnLKs
} q?Ku}eID3
for (j = 1; j <= r - mid; j++) { UC+7-y,
temp[r - j + 1] = data[j + mid]; `mKlv~$1^
} > 0Twr
int a = temp[l]; BsK|:MM]
int b = temp[r]; &ap`}^8pM
for (i = l, j = r, k = l; k <= r; k++) { vpeBQ=2\
if (a < b) { 6a%:zgkOpu
data[k] = temp[i++]; -_EY$?4
a = temp; )`s;~_ZZ
} else { uH ny ]
data[k] = temp[j--]; hViprhC
b = temp[j]; jW1YTQ
} wj#J>C2]
} fzRyG-cEpj
} @!":(@3[
|z#m
/** YV1a3
* @param data gY>;|),
* @param l 65waq~#
* @param i uP(B<NfL:'
*/ zr3q>]oma
private void insertSort(int[] data, int start, int len) { cZaF f?]k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A{4G@k+#d
} Mm5U`mB
} ~}$\B^z+
} q?;*g@t
} 4/HY[FT
|6sT,/6
堆排序： dXhCyr%"6
@~$F;M=.*
package org.rut.util.algorithm.support; Ox7uG{t$#
-- i&"
import org.rut.util.algorithm.SortUtil; 9raHSzK@d
;# R3k
/** nIV.9#~&
* @author treeroot %="~\1y
* @since 2006-2-2 5Cc6, ]
* @version 1.0 Dm|gSv8d,
*/ y$j1?7
public class HeapSort implements SortUtil.Sort{ QIij>!c4
<TLGfA1bC
/* (non-Javadoc) f[JI/H>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d s|8lz,
*/ ?jNF6z*M6
public void sort(int[] data) { qeQC&U y;
MaxHeap h=new MaxHeap(); fuNl4BU
h.init(data); &*(n<5wt
for(int i=0;i h.remove(); 2I]]WBW#:
System.arraycopy(h.queue,1,data,0,data.length); rV8(ia
} #$rf-E5g-K
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private static class MaxHeap{ gro7*<
rPiiC/T.`
void init(int[] data){ ~@[(N]=q
this.queue=new int[data.length+1]; '?{0z!!
for(int i=0;i queue[++size]=data; ->&BcPLn
fixUp(size); LKR==;qn
} \#\`!L[1
} F* 3G_V
x1 ;rb8
private int size=0; &5kZ{,-eM
gB/;clCdX)
private int[] queue; &7L~PZ
/e.FY9
public int get() { ur/Oc24i1n
return queue[1]; U;';"9C2>
} jo,6Aog|u
\3t,|%v
public void remove() { :kWZSN8.D
SortUtil.swap(queue,1,size--); =w',-+@
fixDown(1); I;Al?&uw
} \yih 1Om>~
file://fixdown U9<_6Bsd
private void fixDown(int k) { _-@ZOhw&
int j; n\Z^K
while ((j = k << 1) <= size) { q?;N7P
if (j < size %26amp;%26amp; queue[j] j++; I6K7!+;2
if (queue[k]>queue[j]) file://不用交换 -!XrwQyk
break; 3 R5%N ~
SortUtil.swap(queue,j,k); Ff[H>Lp~
k = j; u{g]gA8s
} ?JuX~{{.L
} **T:eI+
private void fixUp(int k) { "[awmZ:wo
while (k > 1) { =:4'
int j = k >> 1; v\fzO#vj
if (queue[j]>queue[k]) J*}VV9H
break; /lf\ E=
SortUtil.swap(queue,j,k); <8iYL`3
k = j; g/OI|1a
} ISpeV
} eZynF<i
!?BW_vY
} AGh~8[
f|X[gL,B
} P7}t lHX
bHO7*E
SortUtil： :0nK`$'
pt=7~+r
package org.rut.util.algorithm; (3AYy0J%
#t=[w
import org.rut.util.algorithm.support.BubbleSort; hA@zoIoe
import org.rut.util.algorithm.support.HeapSort; nped
import org.rut.util.algorithm.support.ImprovedMergeSort; lN);~|IOv7
import org.rut.util.algorithm.support.ImprovedQuickSort; PASuf.U$"
import org.rut.util.algorithm.support.InsertSort; d-hbvLn
import org.rut.util.algorithm.support.MergeSort; XXXljh6
import org.rut.util.algorithm.support.QuickSort; s0gJ f[
import org.rut.util.algorithm.support.SelectionSort; <Cu'!h_nL
import org.rut.util.algorithm.support.ShellSort; B:e.gtM5
vAi"$e
/** vz6SCGg,
* @author treeroot JR/W9i
* @since 2006-2-2 ''_,S,.a20
* @version 1.0 1pWk9Xuh
*/ "=9-i-K9B
public class SortUtil { .JNcY]V#
public final static int INSERT = 1; XQK^$Iq]V
public final static int BUBBLE = 2; A)OdQFet(
public final static int SELECTION = 3; <"N:rn{Qq
public final static int SHELL = 4; 9Kc0&?q@D
public final static int QUICK = 5; 1W*V2`0>
public final static int IMPROVED_QUICK = 6; h{\t*U54'
public final static int MERGE = 7; W|lH
public final static int IMPROVED_MERGE = 8; +z+F-
public final static int HEAP = 9; a4%`"
)y6QAp
public static void sort(int[] data) { k - FB
sort(data, IMPROVED_QUICK); ,(6)ghr
} T0g0jr{
private static String[] name={ }|AX_=a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L?C\Q^0"`G
}; |Es0[cU
Ny[QT*nV
private static Sort[] impl=new Sort[]{ (viWY
new InsertSort(), =ntftSH
new BubbleSort(), KCE=|*6::|
new SelectionSort(), 5n:nZ_D
new ShellSort(), Og+)J9#
new QuickSort(), bk.*k~_
new ImprovedQuickSort(), %WZ$]M?q
new MergeSort(), I[@ts!YD
new ImprovedMergeSort(), ?vvG)nW
new HeapSort() %yeu"
}; 6Ux[,]GK
'[%jjUU
public static String toString(int algorithm){ 1bd$XnU
return name[algorithm-1]; dQ,Q+ON>
} ebzzzmwo
1y7y0V
public static void sort(int[] data, int algorithm) { X|,["Az 8
impl[algorithm-1].sort(data); Pv~:gP
} ]Z=Ij gr$
(/-lV&eR
public static interface Sort { v3-5"q!Sq
public void sort(int[] data); AHq M7+r9
} b)d^ `J
B`#*o<eb
public static void swap(int[] data, int i, int j) { 2_wvC
int temp = data; ?gU}[]
data = data[j]; _wmI(+_
data[j] = temp; HV8I nodi
} ?5`{7daot
} V- /YNRV