[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; XF`2*:7
} A(Ct^/x-
int i1=l; Q*M#e
int i2=mid+1; +qi& ?}
for(int cur=l;cur<=r;cur++){ !-I,Dh-A
if(i1==mid+1) 0uy'Py@2<
data[cur]=temp[i2++]; -@Ap;,=
else if(i2>r) 5epI'D
data[cur]=temp[i1++]; CEfqFn3^
else if(temp[i1] data[cur]=temp[i1++]; ew;;e|24
else I}$`gUXX8x
data[cur]=temp[i2++]; BR|!ya+_2
} Bfb~<rs[
} vu0Ql1
{i;,Io7W
} q<RjAi
@2(u=E:^
改进后的归并排序: RB>=#03
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package org.rut.util.algorithm.support; I| TNo-!$
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import org.rut.util.algorithm.SortUtil; VZ]iep
~E}kwF
/** lZzW- %K
* @author treeroot y4\X~5kU
* @since 2006-2-2 0d2P
* @version 1.0 (Tx_`rO4VY
*/ l5z//E}W
public class ImprovedMergeSort implements SortUtil.Sort { =4TQ*;V:
~DH9iB
private static final int THRESHOLD = 10; 5SFr E`
+.cpZqWn3
/* aIgexi,
* (non-Javadoc) 74e=zW?
* HwU9y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 18$d-[hX
*/ T!/o^0w
public void sort(int[] data) { /R&`]9].s
int[] temp=new int[data.length]; fECV\Z
mergeSort(data,temp,0,data.length-1); Va!G4_OT
} u%-]-:c
@ZEBtM%.O
private void mergeSort(int[] data, int[] temp, int l, int r) { *%uzLW0
int i, j, k; Z% +$<J
int mid = (l + r) / 2; 2gWR2 H@
if (l == r) 4Kqo>|C
return; nDi^s{
if ((mid - l) >= THRESHOLD) ED0cnr\yG
mergeSort(data, temp, l, mid); ?NE/}?a
else XtCIUC{r,
insertSort(data, l, mid - l + 1); lpT&v;$`
if ((r - mid) > THRESHOLD) MqJTRBs%
mergeSort(data, temp, mid + 1, r); ^y,h0?Z9
else SIK:0>yK"
insertSort(data, mid + 1, r - mid); b'wy{~l@
d` GN!^
for (i = l; i <= mid; i++) { .!1[I{KU
temp = data; {S0-y
} K6{wM
for (j = 1; j <= r - mid; j++) { #-|fdcb
temp[r - j + 1] = data[j + mid]; !7t&d
} mG)5xD
int a = temp[l]; "#)|WVa=BM
int b = temp[r]; 3a:Hx| Yg
for (i = l, j = r, k = l; k <= r; k++) { stiF`l
if (a < b) { Wvl~|Sx]
data[k] = temp[i++]; ,#;hI{E
a = temp; <NZPLo F
} else { j$T12
data[k] = temp[j--]; c0wLc,)G
b = temp[j]; )at:Xm<s
} 7U7!'xU
} >/ _#+,
} ?j&hG|W9<z
-!!]1\S*Y
/** %P}H3;2
* @param data B/X$ZQ0
* @param l >5O~SF.
* @param i [IHo ~
*/ RKLE@h7[?
private void insertSort(int[] data, int start, int len) { -1Tr!I:1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3cHYe
} =!-}q
} 2hV -h
} )4rt-_t<
} a&{Y~Og?%
f2~Aug
堆排序： pW+uVv,
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package org.rut.util.algorithm.support; !h1:AW_iz
4T@+gy^.
import org.rut.util.algorithm.SortUtil; #E+ybwA
}etdXO_^
/** 9(t(sP_
* @author treeroot _1[Wv?
* @since 2006-2-2 YPx+9^)
* @version 1.0 he(K
*/ np2&W'C/i
public class HeapSort implements SortUtil.Sort{ fTXip)n!r
]Ea-MeH
/* (non-Javadoc) D>k(#vYKB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8XJi}YPQ
*/ 4Q!A w
public void sort(int[] data) { N.mRay,
MaxHeap h=new MaxHeap(); D\M"bf>q1
h.init(data); CHTK.%AQH!
for(int i=0;i h.remove(); \^6[^\@[
System.arraycopy(h.queue,1,data,0,data.length); k.C&6*l!5;
} NCh-BinK@
.@fA_8
private static class MaxHeap{ LEM%B??&5z
o/3.U=px~
void init(int[] data){ q\@_L.tc[
this.queue=new int[data.length+1]; u<8b5An;
for(int i=0;i queue[++size]=data; s,r|p@^
fixUp(size); JPn)Op6
} # bHkI~
} 3Ewdu
c5%}* "z
private int size=0; #OPEYJ;*9d
6=n|Ha
private int[] queue; CNb(\]
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public int get() { 0GxJja
return queue[1]; Iuz_u2"C
} G@/iK/>5|`
7d R?70Sz
public void remove() { vyDxX
SortUtil.swap(queue,1,size--); :pM8Q1:B
fixDown(1); rJGh3%
} -+{[.U<1jk
file://fixdown <Q(E {c3"
private void fixDown(int k) { T/E=?kBR
int j; I#xdksY
while ((j = k << 1) <= size) { f2[R2sto@
if (j < size %26amp;%26amp; queue[j] j++; ATqblU>D
if (queue[k]>queue[j]) file://不用交换 %SB4_ r*<
break; >%;i@"
SortUtil.swap(queue,j,k); !#pc@(rE
k = j; Eu' ;f_s
} h,FU5iK|
} 6HZtdRQF
private void fixUp(int k) { vYm-$KQ"o
while (k > 1) { lIS`_H}
int j = k >> 1; K@*+;6y@
if (queue[j]>queue[k]) B!pz0K*uG
break; C W#:'
SortUtil.swap(queue,j,k); )YgntI@
k = j; b9rQQS
} 3"m]A/6C}
} la<.B^
KO=$Hr?f;
} QTBc_Z
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} Hmr f\(x
n4!RGq.}
SortUtil： #1U>
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package org.rut.util.algorithm; qK7:[\T|?T
s8&q8r7%
import org.rut.util.algorithm.support.BubbleSort; <[\I`kzq
import org.rut.util.algorithm.support.HeapSort; UB5H8&Rf!
import org.rut.util.algorithm.support.ImprovedMergeSort; joskKik^
import org.rut.util.algorithm.support.ImprovedQuickSort; Bk\Y v0
import org.rut.util.algorithm.support.InsertSort; o3hgkoF
import org.rut.util.algorithm.support.MergeSort; we[+6Z6J
import org.rut.util.algorithm.support.QuickSort; m6[}KkW
import org.rut.util.algorithm.support.SelectionSort; ;Tnid7:S
import org.rut.util.algorithm.support.ShellSort; BW)-F (v
lXTE#,XVf
/** ,2$<Pt;
* @author treeroot Qu[QcB{ro-
* @since 2006-2-2 QNOdt2NN
* @version 1.0 4 9N.P;b
*/ :=y5713
public class SortUtil { 2c]"*Pb
public final static int INSERT = 1; 9[zxq`qT}+
public final static int BUBBLE = 2; )KE
public final static int SELECTION = 3; m|W17LhW{
public final static int SHELL = 4; 4*qBu}(
public final static int QUICK = 5; :pdX
public final static int IMPROVED_QUICK = 6; dscah0T
public final static int MERGE = 7; avq$aq(3&
public final static int IMPROVED_MERGE = 8; hUi@T}aA|
public final static int HEAP = 9; #?w07/~L
R`@T<ob)
public static void sort(int[] data) { WF`%7A39Af
sort(data, IMPROVED_QUICK); _cQ '3@
} dvjj"F'Bf
private static String[] name={ k5E2{&wZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iGhvQmd(/*
}; uQ-GJI^t
)9"^ D
private static Sort[] impl=new Sort[]{ H9)n<r
new InsertSort(), fYjmG[4
new BubbleSort(), 86)2\uan
new SelectionSort(), KV$&qM.
new ShellSort(), QO}~"lMj
new QuickSort(), 9oJM?&i
new ImprovedQuickSort(), I`{*QU
new MergeSort(), iY/2 `R
new ImprovedMergeSort(), N_bgWQY
new HeapSort() *@''OyL
}; ]S4"JcM
0\XWdTj{
public static String toString(int algorithm){ lo>9 \ Po
return name[algorithm-1]; 3eE=>E4,
} pL1ABvBB
%3qjgyLZ|
public static void sort(int[] data, int algorithm) { nDdY~f.B
impl[algorithm-1].sort(data); ]0*aE
} syBpF:`-W
={%'tv`
public static interface Sort { F2}Fuupb.
public void sort(int[] data); ?@4Mt2Z\
} <VhmtT%7
bUS:c 2"
public static void swap(int[] data, int i, int j) { Y:;_R=M
int temp = data; m@XX2l9:9
data = data[j]; |p[Mp:^^
data[j] = temp; S'34](9n6
} `.J)Z=o
} -:%QoRCy