[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; SEE:v+3|
} u_FN'p=.
int i1=l; GXRW"4eF5
int i2=mid+1; t oM+Bd:Y
for(int cur=l;cur<=r;cur++){ <vb7X
if(i1==mid+1) U_Q;WPJ
data[cur]=temp[i2++]; J5z\e@?.0\
else if(i2>r) D<WGau2H
data[cur]=temp[i1++]; Y)#,6\=U
else if(temp[i1] data[cur]=temp[i1++]; [/<kPi
else Oh,Xjel
data[cur]=temp[i2++]; ~n(LBA
} (CAkzgTfc
} aN!,\D
'a:';hU3f
} !Y/S2J
'QTa<Z)E
改进后的归并排序: ~4xn^.w
nHU}OGzW
package org.rut.util.algorithm.support; ?JW/Stua
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import org.rut.util.algorithm.SortUtil; kv2 H3O
D z[,;
/** ~B7<Yg
* @author treeroot R0G!5>1i
* @since 2006-2-2 ih|&q
* @version 1.0 "I@akM$x
*/ VJ1rU mO~
public class ImprovedMergeSort implements SortUtil.Sort { :b!&Xw$
c4s,T"H
private static final int THRESHOLD = 10; by$mD_sr
y I[kaH"J
/* Z4m+GFY
* (non-Javadoc) /2Ok;!.
* Ds{DVdqA$c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M<Y{Cs
*/ 2tQ?=V(Di
public void sort(int[] data) { vYq"W%
int[] temp=new int[data.length]; E 0@u|
mergeSort(data,temp,0,data.length-1); E `V?Io
} AtqsrYj
#T8PgmR
private void mergeSort(int[] data, int[] temp, int l, int r) { \3hFb,/4k
int i, j, k; tg9{(_t/W
int mid = (l + r) / 2; c_aj-`BKp
if (l == r) !LsIHDs4
return; f=Oj01Ut*
if ((mid - l) >= THRESHOLD) ke)<E98DC
mergeSort(data, temp, l, mid); DU-dIqi
else ']Z%6_WF
insertSort(data, l, mid - l + 1); e488}h6#m
if ((r - mid) > THRESHOLD) i8#:y`ai
mergeSort(data, temp, mid + 1, r); KHM,lj*
else ~ cI`$kJ
insertSort(data, mid + 1, r - mid); F'@9kdp
}|nEbM]#
for (i = l; i <= mid; i++) { f?(g5o*2
temp = data; <y#@v G
} 7dOpJjv?)
for (j = 1; j <= r - mid; j++) { rmdg~
temp[r - j + 1] = data[j + mid]; (%9J(4
} X9C:AGbp
int a = temp[l]; L^2wEF
int b = temp[r]; //bQD>NBO
for (i = l, j = r, k = l; k <= r; k++) { W'e{2u
if (a < b) { )r(e\_n
data[k] = temp[i++]; gb}ov**
a = temp; 8k_hX^
} else { *=Ma5J.
data[k] = temp[j--]; n>)h9q S
b = temp[j]; o?aF
} 'vKae
} w,X J8+B
} -<tTT
#fXy4iL l
/** L:.Rv0XT
* @param data XMaw:Fgr
* @param l ;R3o$ZlY
* @param i :J+ANIRI
*/ 7>EMr}f C
private void insertSort(int[] data, int start, int len) { R?J8#JPXD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5H( ]"C
} v7D0E[)~
} $-\%%n0>6
} /)4Q%Zp
} },O7NSG<o
<t"fL RX
堆排序： xJOp~fKG
yz)Nco]
package org.rut.util.algorithm.support; fS%B/h=
]puDqu5!
import org.rut.util.algorithm.SortUtil; t{Ks}9B
YDgG2hT/2
/** I}awembw g
* @author treeroot eUD 5V
* @since 2006-2-2 ;h#Q!M&e#
* @version 1.0 +hs:W'`%
*/ G+m[W
public class HeapSort implements SortUtil.Sort{ -@~4:o
.4y44: T
/* (non-Javadoc) Ol;"}3*Z*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I~-sBMm(w
*/ gU?M/i2
public void sort(int[] data) { )H&ZHaO,_
MaxHeap h=new MaxHeap(); =n;LP#(h?
h.init(data); ]=Wq&~
for(int i=0;i h.remove(); \^lDd~MWG
System.arraycopy(h.queue,1,data,0,data.length); 0bu!(Tpg7
} -JclEp
q%XjJ -s:
private static class MaxHeap{ Q0L1!}w
9q2x}
void init(int[] data){ E:P_CDSd]
this.queue=new int[data.length+1]; WqHp23
for(int i=0;i queue[++size]=data; 6hHMxS^o
fixUp(size); ?O9|
} t*-_MG
} hF1Lj=x
]hbrzvo
private int size=0; -8SZ}J
p`'3Il3
private int[] queue; <JW%h :\t
/5?tXH"
public int get() { |#B)`r8
return queue[1]; l_ LH!Tu
} ^j1iCL!
!z5Ozm+}
public void remove() { j% '~l#nw
SortUtil.swap(queue,1,size--); JRDIGS_~
fixDown(1); pO2XQYhrY
} $Ut1vp1$
file://fixdown u>V~:q\X
private void fixDown(int k) { Bey9P)_Of
int j; f;bfR&v
while ((j = k << 1) <= size) { Mp@dts/|
if (j < size %26amp;%26amp; queue[j] j++; _ujhD
if (queue[k]>queue[j]) file://不用交换 e`?o`@vO,
break; O/oLQoH
SortUtil.swap(queue,j,k); <"7Wb"+
k = j; Q%0 N\
} = @lM*
} y!~ }7=
private void fixUp(int k) { 2Xv$
while (k > 1) { ~vMJ?P@
int j = k >> 1; 0 l+Jq
if (queue[j]>queue[k]) H)X&5E
break; 7<LCX{Uw
SortUtil.swap(queue,j,k); 4^ZbT
k = j; D+Z2y1
} Hr*xAx
} 1#|qT7
)p{,5"0u
} (?[%u0%_
dfXBgsc6i
} n -xCaq
iz27yXHZ~
SortUtil： b\UE+\a&
PD-*rG `
package org.rut.util.algorithm; ~8)l/I=`);
].@8/. rg
import org.rut.util.algorithm.support.BubbleSort; w$jSlgUHy)
import org.rut.util.algorithm.support.HeapSort; *d-JAE
import org.rut.util.algorithm.support.ImprovedMergeSort; ?JR?PW8
import org.rut.util.algorithm.support.ImprovedQuickSort; =RHIB1
import org.rut.util.algorithm.support.InsertSort; yB4eUa!1
import org.rut.util.algorithm.support.MergeSort; r>6FJ:Tx
import org.rut.util.algorithm.support.QuickSort; ./CDW
import org.rut.util.algorithm.support.SelectionSort; SgQ(#y|vV
import org.rut.util.algorithm.support.ShellSort; )eH?3""
]ts^h~BZ$
/** `KieN/d%
* @author treeroot nHQWO
* @since 2006-2-2 UXOf
* @version 1.0 b{.Y?.U
*/ _lfS"ae
public class SortUtil { Tzfk_h3hE
public final static int INSERT = 1; }wC=p>zA
public final static int BUBBLE = 2; Wp^A.
public final static int SELECTION = 3; OUy}1%HY
public final static int SHELL = 4; <=%G%V_s
public final static int QUICK = 5; WdbHT|.Aj
public final static int IMPROVED_QUICK = 6; !z]{zM%
public final static int MERGE = 7; 88l{M[B2
public final static int IMPROVED_MERGE = 8; `_OB_F
public final static int HEAP = 9; hSaw)g`w
ov1#BeQ
public static void sort(int[] data) { Y0ACJ?|
sort(data, IMPROVED_QUICK); =h/61Bl3
} 4H`B]Zt7
private static String[] name={ -#r=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /&5:v%L
}; '_" S/X+v
t6~~s iQI'
private static Sort[] impl=new Sort[]{ l=47#zbpZ]
new InsertSort(), xj JoWB
new BubbleSort(), =P,pW
new SelectionSort(), z h%b<
new ShellSort(), \+<=O`
new QuickSort(), DKG;up0
new ImprovedQuickSort(), jm[f|4\
new MergeSort(), iAXF;'|W
new ImprovedMergeSort(), Z.N9e
new HeapSort() z\Z+>A
}; 0bjZwC4J
AA}+37@2I
public static String toString(int algorithm){ G'Uq595'-
return name[algorithm-1]; e<"sZK
} w} r mYQ
y.a)M?3
public static void sort(int[] data, int algorithm) { i"n1E@
impl[algorithm-1].sort(data); 'r}y{`3M
} r(g2&}o\
#/)U0IR)
public static interface Sort { ^%qQ)>I=j
public void sort(int[] data); H:o=gP60]
} 8cj}9}k
avUdvV-
public static void swap(int[] data, int i, int j) { @`HW0Y_:
int temp = data; 3C2~heO>|
data = data[j]; vSk1/
data[j] = temp; 6`5DR~
} ;>Z0e`=
} _w7yfZLv+