[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; D_[NzCv<-
} <SQR";
int i1=l; "\T-r2
int i2=mid+1; =wW M\f`=
for(int cur=l;cur<=r;cur++){ |=0w_)Fa]
if(i1==mid+1) Bha("kG
data[cur]=temp[i2++]; @YQ*a4`
else if(i2>r) XjP&
data[cur]=temp[i1++]; /#SfgcDt
else if(temp[i1] data[cur]=temp[i1++]; 9_F&G('V{a
else ]7>#YKH.
data[cur]=temp[i2++]; l6 }+,v@#
} %<+uJ'pj
} 3$q#^UvD
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} 4b((,u$
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改进后的归并排序: D&I/Tbc
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package org.rut.util.algorithm.support; " DLIx}
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import org.rut.util.algorithm.SortUtil; "C&>$h_%
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/** bvrXz-j
* @author treeroot ^#mWV
* @since 2006-2-2 2boyBz}=S
* @version 1.0 }9W[7V?
*/ Vdefgq@<
public class ImprovedMergeSort implements SortUtil.Sort { Y`{62J8oy
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private static final int THRESHOLD = 10; JZ![:$:
upk+L^
/* 6-tIe_5
* (non-Javadoc) zPybPE8
* j~V$q/7S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RticGQy&5
*/ @ext6cFe3<
public void sort(int[] data) { r&B0-7r
int[] temp=new int[data.length]; [!wJIy?,
mergeSort(data,temp,0,data.length-1); iY?#R&
} _&U#*g
reArXmU<u
private void mergeSort(int[] data, int[] temp, int l, int r) { 2Xk;]-T!
int i, j, k; LAnC8O
int mid = (l + r) / 2; 9` UbsxFl
if (l == r) @t1pB]O:
return; V|B4lGS&
if ((mid - l) >= THRESHOLD) tKcC{
mergeSort(data, temp, l, mid); G4P*U3&p
else K1A<m=If
insertSort(data, l, mid - l + 1); ]+m2pEO
if ((r - mid) > THRESHOLD) U1Fo #L
mergeSort(data, temp, mid + 1, r); >i >|]
else 8#tuB8>
insertSort(data, mid + 1, r - mid); oF]]Pl{W
I= <eCv
for (i = l; i <= mid; i++) { koS?UYF`
temp = data; QdcuV\B}
} &4}=@'G@
for (j = 1; j <= r - mid; j++) { ot2zY dWAz
temp[r - j + 1] = data[j + mid]; 6__!M
} *QWOWg4w
int a = temp[l]; :[(%4se
int b = temp[r]; v0! 1W
for (i = l, j = r, k = l; k <= r; k++) { \}W3\To_
if (a < b) { T?d}IDv1
data[k] = temp[i++]; cN?/YkW?]
a = temp; %+,*$wk#*
} else { /5"T46jD
data[k] = temp[j--]; d0ht*b
b = temp[j]; !X$19"
} H lM7^3(&
} ~Js kA5h|&
} mVYfyLZ,(
*c=vEQn-
/** |4 \2,M#
* @param data Qc?W;Q+
* @param l yvzH}$!]
* @param i yp^k;G?_d
*/ Iy4%,8C]g
private void insertSort(int[] data, int start, int len) { O$e"3^Pa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EmrkaV-?k
} W^xO/xu1/
} [xrsa!$
} IvkYM`%
} ::#[lw
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堆排序： PX/{!_mM
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package org.rut.util.algorithm.support; $57Q g1v
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import org.rut.util.algorithm.SortUtil; Hd\oV^>
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/** UjoA$A!Od;
* @author treeroot ZYY2pY 1
* @since 2006-2-2 G rU`;M"
* @version 1.0 U?{oxy_[2
*/ z_R^C%0k
public class HeapSort implements SortUtil.Sort{ /ILd|j(e
*P7/ry^<F
/* (non-Javadoc) siCm)B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W!O/t^H>
*/ bQq/~
public void sort(int[] data) { Kx)PK
MaxHeap h=new MaxHeap(); LS9,:!$
h.init(data); f -F}~S
for(int i=0;i h.remove(); b/R7Mk1
System.arraycopy(h.queue,1,data,0,data.length); {'wvb "b
} Z:N;>.3i
aZ_3@I{d`
private static class MaxHeap{ aN07\
>2pxl(i
void init(int[] data){ -2[4 @
this.queue=new int[data.length+1]; %]0?vw:;j
for(int i=0;i queue[++size]=data; et)n`NlcK
fixUp(size); TB.>?*<n]
} ]4[%Sv6]G
} 2#^g] o-N
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private int size=0; Q Kr/
^JMG'@x
private int[] queue; |,oLZCNa
T!y 9v5
public int get() { xl,% Z~[
return queue[1]; "h[)5V{
} fvH{va.
R59iuHQ[
public void remove() { m^qFaf)6
SortUtil.swap(queue,1,size--); K`9~#Zx$
fixDown(1); %}zkmEY.e
} 4D<C;>*/b
file://fixdown O<L=N-
private void fixDown(int k) { U*Y]cohh
int j; 8/tB?j
while ((j = k << 1) <= size) { *aM7d>nG5
if (j < size %26amp;%26amp; queue[j] j++; Zv9JkY=+@
if (queue[k]>queue[j]) file://不用交换 9XDSL[[
break; x X3I`
SortUtil.swap(queue,j,k); =6:9y}~
k = j; Ym\<@[3+!
} !\1)?&y9j
} 2[pOGc$
private void fixUp(int k) { 2>k*9kyp
while (k > 1) { 25vjn 1$sW
int j = k >> 1; 985h]KQ
if (queue[j]>queue[k]) v.C
break; "PRHQW
SortUtil.swap(queue,j,k); 8M,o)oH
k = j; Q0jg(=9wP
} obF|;fwPnR
} 71AYDO
M_%KhK
} hLZfArq}
H3R{+7
} 59j`Z^e
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SortUtil： ><"|>(y
D-C]0Jf3
package org.rut.util.algorithm; B1~`*~@
K*DH_\SPK
import org.rut.util.algorithm.support.BubbleSort; =,N"% }
import org.rut.util.algorithm.support.HeapSort; Ekq(
import org.rut.util.algorithm.support.ImprovedMergeSort; L7(FDv,?
import org.rut.util.algorithm.support.ImprovedQuickSort; e/+.^ '{
import org.rut.util.algorithm.support.InsertSort; GU/P%c/V
import org.rut.util.algorithm.support.MergeSort; [DeDU:
import org.rut.util.algorithm.support.QuickSort; Ty{ SZUJ
import org.rut.util.algorithm.support.SelectionSort; fm^`
import org.rut.util.algorithm.support.ShellSort; VUUnB<j
<v'[Wl@hq
/** q#c+%,Z=C
* @author treeroot Nk\ni>Du3
* @since 2006-2-2 ,ps?@lD
* @version 1.0 OZf@cOTWK
*/ .EHq.cde
public class SortUtil { Tb2#y]27
public final static int INSERT = 1; 3zKeN:w
public final static int BUBBLE = 2; wt9f2
public final static int SELECTION = 3; k -R"e
public final static int SHELL = 4; C&qo$C
public final static int QUICK = 5; 1U/9=b
public final static int IMPROVED_QUICK = 6; ju[y-am$/
public final static int MERGE = 7; "wZvr}xk
public final static int IMPROVED_MERGE = 8; 4FYV]p8f
public final static int HEAP = 9; [c1Gq)ht
pl@K"PRE
public static void sort(int[] data) { G?,3Zn0
sort(data, IMPROVED_QUICK); %Ul,9qG+
} JK!`uG+v
private static String[] name={ ~PyS;L}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <aaT,J8%[
}; 9fbbJ"I+
P(@Q[XQ2
private static Sort[] impl=new Sort[]{ N& F.hi$_
new InsertSort(), EMr|#}]#s
new BubbleSort(), 1@'I eywg
new SelectionSort(), {#?|&n<
new ShellSort(), +(:Qf+:
new QuickSort(), =EYgck;)
new ImprovedQuickSort(), [75?cQD
new MergeSort(), Yh!k uS#<
new ImprovedMergeSort(), dB#c$1
new HeapSort() T'lycc4~a
}; L|#0CRiN
zq$L[X
public static String toString(int algorithm){ uc"%uc'
return name[algorithm-1]; Ue;Z)}
} (r?hD*2r
9\Ff z&
public static void sort(int[] data, int algorithm) { V73/q
impl[algorithm-1].sort(data); PeiRe
} *mj=kJ7(
5-fASN.Lx
public static interface Sort { :!CnGKgt
public void sort(int[] data); PY '^:0
} 8,h!&9
29Gel
public static void swap(int[] data, int i, int j) { +Z_VF30pa
int temp = data; alzdYiGf
data = data[j]; fsEQ4xN'
data[j] = temp; ~};q/-[r
} WY@g=W>+
} YSPUQ