[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; 5,|of{8
} tIk$4)ZAl
int i1=l; JFdMYb
int i2=mid+1; ?$MO!
for(int cur=l;cur<=r;cur++){ Rrrq>{D
if(i1==mid+1) lS|F&I5j
data[cur]=temp[i2++]; {A~3/M%74;
else if(i2>r) (%'`t(<
data[cur]=temp[i1++]; P~84#5R1
else if(temp[i1] data[cur]=temp[i1++]; z))rk vL%
else N)/7j7c~;
data[cur]=temp[i2++]; tzY?LX[3
} @1~cPt
} XVF!l>nE
5Y 7 %Z
} m2HO .ljc
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改进后的归并排序: tkQrxa|
!yvw5As%
package org.rut.util.algorithm.support; W/VEB3P>Z
`#:(F z
import org.rut.util.algorithm.SortUtil; b/_u\R ]-'
7)RRCsn
/** Z+=WICI/2
* @author treeroot >,.\`.0
* @since 2006-2-2 '|}H,I{
* @version 1.0 5&.I9}[)j
*/ I+QM":2
public class ImprovedMergeSort implements SortUtil.Sort { #r,!-;^'p
cd`P'GDF
private static final int THRESHOLD = 10; g'Wr+(A_
Z5g*'
/* U] P{~
* (non-Javadoc) <kJ`qbOU
* |9Y~k,rF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y7,t"XV
*/ {8 &=t8,c
public void sort(int[] data) { vXZ )
int[] temp=new int[data.length]; {N << JX
mergeSort(data,temp,0,data.length-1); ^9]g5.z:
} H6Ytp^~>
kkJ8xyO
private void mergeSort(int[] data, int[] temp, int l, int r) { PzT@q\O
int i, j, k; --k!KrL
int mid = (l + r) / 2; :Dfl,=S
if (l == r) x_9#:_S'
return; ltyhYPS
if ((mid - l) >= THRESHOLD) s)Xz}QPK.
mergeSort(data, temp, l, mid); ']d(m?
else vsPIvW!V
insertSort(data, l, mid - l + 1); {L \TO,
if ((r - mid) > THRESHOLD) 4&%E?_M
mergeSort(data, temp, mid + 1, r); 36Lf8~d4"h
else t qUBl?i
insertSort(data, mid + 1, r - mid); Zq'FOzs
0d$LUQ't
for (i = l; i <= mid; i++) { !^EA}N.u
temp = data; N'PK4:
} ~Lq`a@]A
for (j = 1; j <= r - mid; j++) { YV'B*arIA
temp[r - j + 1] = data[j + mid]; Esm=sPW
} b~{nS,_Rn
int a = temp[l]; :UX8^+bfZ
int b = temp[r]; -c{Y+M`
for (i = l, j = r, k = l; k <= r; k++) { 1ed^{Wa4$9
if (a < b) { {suQ"iv
data[k] = temp[i++]; }rnu:7
a = temp; p&\DG
} else { : rudo[L
data[k] = temp[j--]; 8bf@<VTO_
b = temp[j]; E&Zt<pRf;2
} fl40jo]
} 8@){\.M
} [!Djs![O
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/** b!`6s
* @param data YDZB$?&a
* @param l c[;A$P= 8.
* @param i xiL+s-
*/ sGh TP/
private void insertSort(int[] data, int start, int len) { EWq < B)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wKoar
} o}D }Q"=A
} 4;(W0RQa
} CtUAbR
} flz7{W
+U>Y.YP
堆排序： 9{rE7OX*A
F6\4[B
package org.rut.util.algorithm.support; 7\X_%SM%
ulk/I-y
import org.rut.util.algorithm.SortUtil; s){VU2.ra
'H"!%y{:i
/** ?m9=Me
* @author treeroot I,aaSBwt&2
* @since 2006-2-2 uL:NWgN
* @version 1.0 e;LC\*dG
*/ gQ|?~hYYv
public class HeapSort implements SortUtil.Sort{ "`mG_qHI[
~mZ[@Z
/* (non-Javadoc) -al
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 69t6lB#;!
*/ HdTB[(
public void sort(int[] data) { b8[ ayy
MaxHeap h=new MaxHeap(); sxdDI?W4
h.init(data); ma/<#l^}
for(int i=0;i h.remove(); 7mn&w$MS4:
System.arraycopy(h.queue,1,data,0,data.length); sQ&<cBs2
} C0khG9,BL
7W+{U02O
private static class MaxHeap{ >wR)p\UEb
s7\Ee-x)s
void init(int[] data){ uz:r'+v
this.queue=new int[data.length+1]; x7i,jMR
for(int i=0;i queue[++size]=data; BAG#YZB
fixUp(size); nITkgN:s
} |x=(}g
} ,#9i=gp
+i}uRO
private int size=0; MlLM $Y-@
,Ww.W'#P
private int[] queue; bIzBY+P
&'/bnN +R
public int get() { 1uEM;O
return queue[1]; M5xMTP-
} -zZb]8\E
3ly]DTbz
public void remove() { <p?oFD_e4
SortUtil.swap(queue,1,size--); vrh2}biCR
fixDown(1); Xi~I<&
} B7S)L#l_\
file://fixdown g6$\i m
private void fixDown(int k) { _s:5)
int j; ) bd`U
while ((j = k << 1) <= size) { Yf1%7+V35
if (j < size %26amp;%26amp; queue[j] j++; '#yIcV$
if (queue[k]>queue[j]) file://不用交换 2+K-I
break; Cd_H<8__
SortUtil.swap(queue,j,k); 'oM=ZU8wo
k = j; Wd7qpWItjQ
} X@/wsW(kM\
} q9\(<<f|
private void fixUp(int k) { :3b\pEO9\
while (k > 1) { n"vO?8Sx
int j = k >> 1; 6aWNLJ@
if (queue[j]>queue[k]) V<U9Pj^?^
break; q AsTiT6r
SortUtil.swap(queue,j,k); C?<[oQb#
k = j; f'tQLF[r<
} Z}IuR|=
} d_&~^*>
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} $dKo}
gEmsPk,
} #8%~u+"N
821 6_Qm
SortUtil： P` Gb}]rW
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package org.rut.util.algorithm; }_Y\6fcd
' R= OeH
import org.rut.util.algorithm.support.BubbleSort; a!&m\+?
import org.rut.util.algorithm.support.HeapSort; |T*t3}
import org.rut.util.algorithm.support.ImprovedMergeSort; 3g0v,7,Zv
import org.rut.util.algorithm.support.ImprovedQuickSort; YdYaLTz
import org.rut.util.algorithm.support.InsertSort; VK|$SY(
import org.rut.util.algorithm.support.MergeSort; LX(`@-<DH
import org.rut.util.algorithm.support.QuickSort; 20M]gw]
import org.rut.util.algorithm.support.SelectionSort; ~!e(e2
import org.rut.util.algorithm.support.ShellSort; X1Kze
d1NKVMeWr
/** $SzuUI
* @author treeroot vJQ_mz
* @since 2006-2-2 >/.Ae8I)
* @version 1.0 bV*q~@xh
*/ 7!e kINQ
public class SortUtil { /g!X[rn7Q
public final static int INSERT = 1; D6'-c#
public final static int BUBBLE = 2; o KY0e&5
public final static int SELECTION = 3; 2W/*1K}
public final static int SHELL = 4; 7+$P6[*
public final static int QUICK = 5; n]K{-C;
public final static int IMPROVED_QUICK = 6; "&\]1A}Z-x
public final static int MERGE = 7; {!pYQ|#
public final static int IMPROVED_MERGE = 8; .|y{1?f_
public final static int HEAP = 9; /f>I;z1
;v~xL!uQ
public static void sort(int[] data) { Fl\kt.G
sort(data, IMPROVED_QUICK); Ujvk*~:
} G.^^zmsM`
private static String[] name={ T1RICIf1F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,!98VJmr
}; OV-#8RXJ
K48QkZ_gY
private static Sort[] impl=new Sort[]{ h3p~\%^
new InsertSort(), x`K"1E{2
new BubbleSort(), '~xjaa;.
new SelectionSort(), u}jC$T>2%6
new ShellSort(), 't475?bY
new QuickSort(), :|=Xh"l"
new ImprovedQuickSort(), CSr2\ogT
new MergeSort(), y*lAmO
new ImprovedMergeSort(), )!sjXiC!h
new HeapSort() ?!bA#aSbl5
}; T6=~vOzTJ
?cD_\~
public static String toString(int algorithm){ "@itn
return name[algorithm-1]; nwJc%0
} ?Lr:>
l YjPrA]TC
public static void sort(int[] data, int algorithm) { |(5|6r3
impl[algorithm-1].sort(data); +4k4z:<n
} ?T>NvKF
s)9sbJ
public static interface Sort { N&W7g#F
public void sort(int[] data); "I3&a1*
} _D1)_?`a@-
oXGP6#
public static void swap(int[] data, int i, int j) { ,"T[#A~
int temp = data; e!4Kl:
data = data[j]; 1tH#QZIT
data[j] = temp; z|zd=3c
} 21~~=+)X
} .1[pO_