[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; uM$=v]e^4
} _eS*e-@O5
int i1=l; %"tf`,d~3
int i2=mid+1; `*B8IT)
for(int cur=l;cur<=r;cur++){ BehV :M
if(i1==mid+1) f/xBR"'
data[cur]=temp[i2++]; |?8wyP
else if(i2>r) Oc1ZIIkh\
data[cur]=temp[i1++]; WO^h\#^n
else if(temp[i1] data[cur]=temp[i1++]; vv3?ewr y
else G.;<?W
data[cur]=temp[i2++]; Nz8iU@!a
} [(1O_X(M
} ;:OJQFu%4
M&L"yQA
} ]pb3 Fm{
mdwY48b
改进后的归并排序: '5IJ;4k
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package org.rut.util.algorithm.support; YV9%^ZaN7
p[RD[&#b
import org.rut.util.algorithm.SortUtil; B{Rig5Sc
iJcl0)|
/** rW6LMkt72
* @author treeroot Y\lBPp0{\v
* @since 2006-2-2 =1D*K%
* @version 1.0 7RO=X%0A
*/ NEvt71k
public class ImprovedMergeSort implements SortUtil.Sort { }w$/x<Q[
'(Pbz
private static final int THRESHOLD = 10; j_Fr3BWS
XHV+Y+VG
/* RZ -w,~
* (non-Javadoc) 6eb5q/
* 7}xKiHh:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZyTah\yPM
*/ IMBqy-q
public void sort(int[] data) { RGcT
int[] temp=new int[data.length]; Qx:+n`$/
mergeSort(data,temp,0,data.length-1); j \SDw
} W[b/.u5z:
cWm.']
private void mergeSort(int[] data, int[] temp, int l, int r) { i''dY!2
int i, j, k; 0]T ;{
int mid = (l + r) / 2; iS{)Tll}&
if (l == r) 1oC/W?l^
return; 0-QkRr_I
if ((mid - l) >= THRESHOLD) Z|)~2[Roa
mergeSort(data, temp, l, mid); b{sFN!
else wM><DrQ
insertSort(data, l, mid - l + 1); =w8*n2
if ((r - mid) > THRESHOLD) >k:)'*
mergeSort(data, temp, mid + 1, r); Vi]D](^!
else t.m $|M>
insertSort(data, mid + 1, r - mid); ivt\| >
Bk8U\Ut
for (i = l; i <= mid; i++) { *H;&hq
temp = data; SN11J+
} g?`w)O7v
for (j = 1; j <= r - mid; j++) { ^s%Qt
temp[r - j + 1] = data[j + mid]; 1~j.jv$
} c$p1Sovw
int a = temp[l]; 9"/{gf3D
int b = temp[r]; H94$Xi"Bd
for (i = l, j = r, k = l; k <= r; k++) { 9[:nWp^
if (a < b) { eudPp"Km
data[k] = temp[i++]; \HRQSfGt
a = temp; 4*'NpqC(_
} else { 3b|.L Jz+
data[k] = temp[j--]; D4@=+
b = temp[j]; {C 7=
} ]RxNSr0e
} #Qkl| h
} CnAhEf)b
,2u]rLxx;
/** y:1?~R
* @param data qoOHWh&
* @param l VGTo$RH
* @param i b\}`L"
*/ E#T'=f[r~
private void insertSort(int[] data, int start, int len) { `9@!"p f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LV`- eW
} E]Kd`&^}
} 7m8L!t9
} )Y)7p//
} ^c+6?
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堆排序： MTr _8tI
b%AYYk)d?
package org.rut.util.algorithm.support; ^E>}A
O#9Q+BD
import org.rut.util.algorithm.SortUtil; jk)U~KGcg
zS.7O'I<'
/** 2H4+D)
* @author treeroot N:=D@x~]
* @since 2006-2-2 d ;ry!X
* @version 1.0 e;Q~P]x
*/ w:pc5N>we0
public class HeapSort implements SortUtil.Sort{ 0(teplo&P
OS,-dG(
/* (non-Javadoc) nQ8EV>j2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Bs_" P[
*/ GMksr%0Pj
public void sort(int[] data) { S# SA:>8s
MaxHeap h=new MaxHeap(); N+h|Ffnp
h.init(data); x%LWcT/
for(int i=0;i h.remove(); UGl}=hwKkG
System.arraycopy(h.queue,1,data,0,data.length); E|#'u^`yv
} 'tF<7\!
K&Zdk (l)
private static class MaxHeap{ b@nbXm]Z
S&@~F|
void init(int[] data){ 6jom6/F 4
this.queue=new int[data.length+1]; B,}%1+*
for(int i=0;i queue[++size]=data; {?,:M
fixUp(size); 9'O<d/xj/
} T<P4+#JK
} _)lK.5
DAJh9I
private int size=0; QiY7m<3
tBdvk>d
private int[] queue; erqg|TsFj
$yRbo'-
public int get() { N/]TZu~k z
return queue[1]; RtK/bUa
} VM|8HR7U
rY88xh^
public void remove() { /ZX8gR5x
SortUtil.swap(queue,1,size--); +STT(bMn
fixDown(1); R0{+Xd
} v^JyVf>
file://fixdown %J3#4gG^v
private void fixDown(int k) { B7va#'ne4{
int j; _k _F
while ((j = k << 1) <= size) { 9v0f4Pbxm
if (j < size %26amp;%26amp; queue[j] j++; HH8a"Hq)
if (queue[k]>queue[j]) file://不用交换 _/7[=e}y
break; tlG&PVvr
SortUtil.swap(queue,j,k); ;v#~o*
k = j; ;z!~-ByzL
} 2x'JR yef
} to+jQ9q8
private void fixUp(int k) { 0G;RMR':5
while (k > 1) { ai#0ZgO
int j = k >> 1; ^h=;]vxO
if (queue[j]>queue[k]) 65qH
break; O]i}r`E8,
SortUtil.swap(queue,j,k); %5jxq9:K
k = j; Ci=c"JdB
} /\h&t6B1
} DS-Kot(k(z
<"aPoGda
} e$ E=n
V<P@hAAr
} KG)Y{-Ao
PQ5QA61
SortUtil： 4T|b Cs?e
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package org.rut.util.algorithm; Q(wx nm
a&/#X9/
import org.rut.util.algorithm.support.BubbleSort; TaKLzd2
import org.rut.util.algorithm.support.HeapSort; PgtJ3oq[}
import org.rut.util.algorithm.support.ImprovedMergeSort; -GhP9; d
import org.rut.util.algorithm.support.ImprovedQuickSort; [q?<Qe
import org.rut.util.algorithm.support.InsertSort; RP[{4Q8
import org.rut.util.algorithm.support.MergeSort; le/,R@]B9
import org.rut.util.algorithm.support.QuickSort; ,(qRc(Ho
import org.rut.util.algorithm.support.SelectionSort; 9g'LkP
import org.rut.util.algorithm.support.ShellSort; ?XrQ53
a{^m-fSaR"
/** gQWa24
* @author treeroot hYPl&^
* @since 2006-2-2 I*{4rDt
* @version 1.0 + jc!5i .
*/ Q=;U@k@>
public class SortUtil { &"f";
public final static int INSERT = 1; n}F&1Z
public final static int BUBBLE = 2; 3!XjtVhK?I
public final static int SELECTION = 3; $q6BP'7
public final static int SHELL = 4; 7K,-01-:
public final static int QUICK = 5; ?Y-%'J(
public final static int IMPROVED_QUICK = 6; LlX{#R
public final static int MERGE = 7; eKE#Yr d=x
public final static int IMPROVED_MERGE = 8; $WyD^|~SF
public final static int HEAP = 9; Qu?R8+"KS
=RA /
public static void sort(int[] data) { QM5R`i{r
sort(data, IMPROVED_QUICK); ;RDh~EV
} @XLy7_}
private static String[] name={ `Q|*1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (eI5_`'VC
}; JjPKR?[>
PF)jdcX
private static Sort[] impl=new Sort[]{ K1mPr^3rC
new InsertSort(), *"?l]d
new BubbleSort(), K28+]qy[
new SelectionSort(), ALrw\qV
new ShellSort(), }\tdcTMgS
new QuickSort(), v- T$:cL
new ImprovedQuickSort(), ;X?}x%$
new MergeSort(), 1O/+8yw
new ImprovedMergeSort(), R;s?$;I
new HeapSort() l~c@^!
}; 7X0Lq}G@
~ELNyI11
public static String toString(int algorithm){ 2`7==?
return name[algorithm-1]; Oft-w)cYz,
} E7t+E)=8
7!@-*/|!S9
public static void sort(int[] data, int algorithm) { QLXN*c
impl[algorithm-1].sort(data); cii_U=
} wQqb`l7+
Isvx7$Vu+
public static interface Sort { 6h|q'.Y
public void sort(int[] data); z.7cy@N6
} f[<m<I
B:5Rr}eY+
public static void swap(int[] data, int i, int j) { )WRLBFi3
int temp = data; "'c A2~
data = data[j]; CJ1 7n
data[j] = temp; G,?hp>lj
} QQ%D8$k"
} ]RPs|R?